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1970 Pacific typhoon season

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1970 Pacific typhoon season
Season summary map
Seasonal boundaries
First system formedJanuary 1, 1970
Last system dissipatedDecember 19, 1970
Strongest storm
NameHope
 • Maximum winds280 km/h (175 mph)
(1-minute sustained)
 • Lowest pressure895 hPa (mbar)
Seasonal statistics
Total depressions31
Total storms26
Typhoons13
Super typhoons7 (unofficial)
Total fatalities> 1,847
Total damage> $216 million (1970 USD)
Related articles
Pacific typhoon seasons
1968, 1969, 1970, 1971, 1972

The 1970 Pacific typhoon season has no official bounds; it ran year-round in 1970, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.

The scope of this article is limited to the Pacific Ocean, north of the equator and west of the International Dateline. Storms that form east of the date line and north of the equator are called hurricanes; see 1970 Pacific hurricane season. Tropical Storms formed in the entire west Pacific basin were assigned a name by the Joint Typhoon Warning Center. Tropical depressions in this basin have the "W" suffix added to their number. Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the Philippine Atmospheric, Geophysical and Astronomical Services Administration or PAGASA. This can often result in the same storm having two names.

Systems

[edit]
Typhoon PatsyTyphoon KateTyphoon Joan

27 tropical depressions formed this year in the Western Pacific, of which 24 became tropical storms. 12 storms reached typhoon intensity, of which 7 reached super typhoon strength.

Typhoon Nancy (Atang)

[edit]
Typhoon (JMA)
Category 4-equivalent typhoon (SSHWS)
 
DurationFebruary 19 – February 28
Peak intensity220 km/h (140 mph) (1-min);
950 hPa (mbar)

Nancy originated from the interaction between an active ITCZ and a cold front near the Caroline Islands and the equator in mid February. An increase in convection was shown by weather satellites on February 18 and by the following day a recon aircraft found a weak depression to the south of the Caroline Islands. The depression moved west, suppressed south by a high pressure ridge to the north, and gradually strengthened into a tropical storm and was given the name Nancy early on February 20. Nancy became a typhoon on the 22 about 100 miles northwest from Woleai. On February 23 Nancy passed to the north of Yap where strong gale winds occurred. Continuing to encounter more favorable conditions Nancy was able to achieve a peak intensity of 140 mph (220 km/h) and a pressure of 952 hPa (28.1 inHg) on February 24.[1] This was the equivalent of a category four hurricane. It is rare to have a typhoon of this magnitude during the month of February, as noted by the JTWC, only Irma of the 1953 season reached the same intensity at the time. As Nancy approached the Philippine Islands the typhoon traversed to the western ambit of the ridge that had kept it to the south, allowing it to move farther in a north direction. During the 25 Nancy passed east off the coast of the easternmost islands of the Philippines. On the island of Catanduanes, the edge of the eye brushed the eastern coast. A U. S. Coast Guard loran station on Catanduanes recorded intense winds, at which point the equipment malfunctioned. The storm encountered a hostile environment to the northeast of Luzon and began to weaken. By February 26 Nancy had become a tropical storm and shortly afterward had transitioned into an extra tropical cyclone and moved off into open ocean. By the 28 what remained of Nancy was a frontal trough.[2]

Nancy caused significant damage to the Philippines and surrounding islands. Particularly hard hit were the islands of Catanduanes and Samar. Damage was estimated near a million dollars with 5,000 families homeless. On the Island of Yap heavy storm surge caused $160,000 in damages, luckily no one was killed. A 6,065 ton American ship, Antinous, encountered the full brunt of the typhoon shortly before midnight, February 24. Ship logs record sea swells of over 40 feet, winds over 100 knots, a central pressure of 953 millibars, and three of the ships large butane tanks on the main dock broke free during the storm along with a portion of its bulwark.[2]

Typhoon Olga (Deling)

[edit]
Typhoon (JMA)
Category 5-equivalent super typhoon (SSHWS)
 
DurationJune 27 – July 5
Peak intensity260 km/h (160 mph) (1-min);
905 hPa (mbar)

In mid-June a change in the jet stream over a large part of the Pacific Ocean caused an increase in tropical wave frequency; one becoming the precursor to Olga. The wave was first noticed near the Marshall Islands, particularly the Island of Majuro on June 24. As it moved west weather satellites depicted the wave had begun to organize with considerable convection and spiraling storm bands as it neared the Central Caroline Islands. Due to the waves close proximity to a high pressure area to the north, strong easterlies accelerated it to the west. The increased forward speed inhibited the establishment of a circulation until it was south of Guam early on June 29. Later that day reconnaissance found a closed center and gale-force winds, prompting the JTWC to upgrade the low into a tropical storm and was given the name Olga. As it entered the Philippine Sea the ridge that had kept it to the south began to weaken allowing Olga to move in a northwestward direction. As Olga entered an increasingly favorable environment, the storm slowed its forward speed and strengthened into a typhoon late on June 29. Rapid intensification followed as the system bottomed out at a pressure of 904 hPa (26.7 inHg) and winds of 160 mph (260 km/h) on July 1.[3] The rapid 62 millibar drop between June 30 and July 1 caused an intense wind profile surrounding the small eye. The storm followed a break in the ridge and moved north while gradually weakening. As Olga was passing to the east of Taiwan a short wave from the China mainland gave an eastward component to the storm's motion. A low developed following the short wave and began to influence Olga, causing the typhoon to weaken. Dry air soon entered the circulation, reducing the systems overall convection. During July 5 Olga made landfall on the Kansai region of Japan, south of Osaka, as a tropical storm. The system continued into the Sea of Japan, and merged with a cold front. The remaining low tracked over South Korea before completely dissipating on July 7.[2]

Olga was a very intense typhoon, causing an estimated ten million dollars to Japan alone. While passing through the Ryukyu Islands wind measurements were as high as 130 mph (205 km/h) on July 4. Heavy rains occurred over Japan, up to 14 inches in some areas, caused landslides and extensive flooding; killing 20. In South Korea 29 deaths were caused by the heavy rainfall associated with Olga's remnants.[2]

Severe Tropical Storm Pamela (Klaring)

[edit]
Severe tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationJune 28 – July 1
Peak intensity95 km/h (60 mph) (1-min);
980 hPa (mbar)

Forming on June 28, Pamela slowly travelled towards the Philippines , and made landfall late on June 30. The tropical storm brought rains and winds to the Philippines, but no major damage was reported. Having greatly weakened after landfall, Pamela degenerated into a remnant low and dissipated over the South China Sea on July 1, just as Category 5 Super Typhoon Olga reached its peak.

Severe Tropical Storm Ruby (Emang)

[edit]
Severe tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationJuly 11 – July 17
Peak intensity100 km/h (65 mph) (1-min);
985 hPa (mbar)

Tropical Storm Ruby formed as a disturbance east of the Philippines. It slowly traveled west-southwest, becoming a tropical storm on the 12th. It crossed the northern part of Luzon before making landfall in China on the 15th.[2] The storm became extratropical over China, and proceeded northwest, crossing Hokkaido before dissipating over the Aleutian Islands.

Tropical Storm Sally

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationJuly 19 – July 23
Peak intensity75 km/h (45 mph) (1-min);
992 hPa (mbar)

Tropical Storm Sally was a tropical cyclone that formed in the Western Pacific Ocean during the 1970 Pacific typhoon season . It developed from a tropical disturbance on July 19 and gradually intensified into a tropical storm . It became a tropical storm on the 21st, then became extratropical on the 22nd Sally moved generally westward, remaining at sea throughout its lifespan. The storm reached its peak intensity as a tropical storm with maximum sustained winds of 75 kilometers per hour (45 miles per hour). Sally eventually weakened and dissipated on July 23. Due to its offshore track, Tropical Storm Sally did not cause any significant impact on land. The storm primarily affected open waters, generating rough seas and strong winds in the vicinity of its path.[2]

Tropical Depression 07W (Gading)

[edit]
Tropical depression (JMA)
Tropical storm (SSHWS)
 
DurationJuly 25 – August 2
Peak intensity85 km/h (50 mph) (1-min);
994 hPa (mbar)

Tropical Depression 07W, also known in the Philippines as Gading, was a tropical cyclone that formed in the Western Pacific Ocean during the 1970 Pacific typhoon season . It originated from a tropical depression that developed on July 25. The system gradually organized and intensified, reaching tropical depression strength. 07W generally moved westward, passing the PAR or Philippine Area of Responsibility , bringing rainfall in Taiwan , and hitting Eastern China . The depression maintained its intensity for a short period before weakening and dissipating on August 2. Due to its relatively weak intensity and offshore track, Tropical Depression 07W (Gading) did not cause any significant impact on land areas but still bringing rainfall. The storm primarily affected open waters, generating rough seas and gusty winds in the vicinity of its path.

Tropical Storm 06W

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationJuly 28 – August 1
Peak intensity75 km/h (45 mph) (1-min);
994 hPa (mbar)

Tropical Storm Therese

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationAugust 1 – August 4
Peak intensity75 km/h (45 mph) (1-min);
990 hPa (mbar)

Tropical Storm Therese also remained far at sea during its life. It formed as a disturbance on the 30th, then turned northwestward and became a tropical storm, before undergoing extratropical transition and dissipating over the Bering Sea.

Tropical Storm Violet (Heling)

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationAugust 3 – August 9
Peak intensity75 km/h (45 mph) (1-min);
992 hPa (mbar)

Tropical Storm Violet formed east of the Philippines, then traveled westward, becoming a tropical storm before making landfall on Luzon. Violet then crossed the South China Sea before making landfall in China as a weak tropical storm. It dissipated over China shortly after.

Typhoon Wilda (Iliang)

[edit]
Typhoon (JMA)
Category 3-equivalent typhoon (SSHWS)
 
DurationAugust 9 – August 15
Peak intensity195 km/h (120 mph) (1-min);
940 hPa (mbar)

A broad surface trough developed into Tropical Storm Wilda on August 9. After drifting to the west-southwest, it turned to the north, where it reached a peak of 120 mph winds on the 12th near Okinawa. Wilda continued northward, and weakened slightly to a 105 mph typhoon before making landfall on western Kyūshū on the 14th. Wilda accelerated to the northeast, and became extratropical on the 15th. The typhoon caused heavy rain, killing 11 people.

Typhoon Anita

[edit]
Typhoon (JMA)
Category 4-equivalent typhoon (SSHWS)
 
DurationAugust 15 – August 22
Peak intensity250 km/h (155 mph) (1-min);
910 hPa (mbar)

An upper level low contributed to the formation of Tropical Depression 11W on August 16 over the northern Marianas Islands. It quickly intensified, reaching typhoon status that night. Anita's intensification rate slowed initially, but as it continued northwestward late on the 18th and 19th, Anita rapidly strengthened to a 155 mph super typhoon. It weakened as it accelerated to the north-northwest, and hit western Shikoku in Japan on the 21st as a 115 mph typhoon. Anita, which became extratropical on the 22nd, caused 23 deaths and sank 31 vessels.

Typhoon Billie (Loleng)

[edit]
Typhoon (JMA)
Category 3-equivalent typhoon (SSHWS)
 
DurationAugust 21 – August 31
Peak intensity205 km/h (125 mph) (1-min);
945 hPa (mbar)

Typhoon Billie formed in the Philippine Sea as a weak depression. It intensified while heading northwards, becoming a tropical storm on the 23rd, a typhoon on the 25th, and reaching its maximum intensity of 110-knot winds and a 945-millibar central pressure as it passed the Ryukyu Islands on the 27th. The storm brushed South Korea as a category-1-equivalent typhoon on the 29th before making landfall in North Korea on the 30th.[2] The remnants of Billie dissipated over the Sino-Soviet border shortly after.

Typhoon Clara

[edit]
Typhoon (JMA)
Category 2-equivalent typhoon (SSHWS)
 
DurationAugust 25 – September 4
Peak intensity155 km/h (100 mph) (1-min);
960 hPa (mbar)

Tropical Storm Clara developed on August 26 southeast of Japan from an upper tropospheric circulation that separated from the Mid-Pacific trough. It quickly strengthened, and became a typhoon on the 27th at 31.9º North, one of only 16 Western Pacific typhoons to reach that strength north of 30ºN. Clara peaked at 95 mph before coming close to Japan, when a shortwave trough forced it sharply eastward. The storm maintained its intensity until becoming extratropical on September 3. An interesting fact about Clara was a reconnaissance mission flown into Hurricane Dot in the central Pacific also flew into Clara on the same flight, an unusual accomplishment not normally seen.

Tropical Depression Miding

[edit]
Tropical depression (JMA)
 
DurationAugust 31 – September 2
Peak intensity55 km/h (35 mph) (10-min);
996 hPa (mbar)

Severe Tropical Storm Fran (Norming)

[edit]
Severe tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationSeptember 3 – September 10
Peak intensity100 km/h (65 mph) (1-min);
975 hPa (mbar)

Tropical Storm Fran formed east of the Philippines on the 3rd, then traveled in a rather unusual fashion, traveling away from the coast before turning back towards it. It passed over the northern part of Taiwan Island on the 6th, before making landfall in China on the 7th. The remnants of Fran lingered over China for some days before it dissipated.[2]

Tropical Storm Ellen (Oyang)

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationSeptember 3 – September 6
Peak intensity85 km/h (50 mph) (1-min);
985 hPa (mbar)

Tropical Storm Ellen formed east of the Philippines and traveled northwestwards, becoming a tropical storm well south of Japan. It passed over the southern Ryukyu Islands before dissipating.

Typhoon Georgia (Pitang)

[edit]
Typhoon (JMA)
Category 5-equivalent super typhoon (SSHWS)
 
DurationSeptember 7 – September 16
Peak intensity260 km/h (160 mph) (1-min);
905 hPa (mbar)

Georgia originated from a tropical wave on September 7, and became tropical storm Georgia on the 8th. Moving over warmer waters, Georgia reached typhoon status late on the 8th and super typhoon status on the 10th, developing a distinct eye. Georgia continued to strengthen further and peaked as a 160 mph category 5 super typhoon, just as the typhoon made landfall at Luzon. Georgia did not drop a lot of rain during its passage through the Philippines, but its strong winds caused 95 casualties (with 80 missing) and damage at $1.4 million (1970 USD). Georgia greatly weakened over the Philippines, and emerged into the South China Sea on the 12th, as a category 1 typhoon. A trough turned Georgia to the north on the 13th, and Georgia made its final landfall in China, degenerating into a remnant low on the 14th, and completely dissipating on the 16th.

Typhoon Hope

[edit]
Typhoon (JMA)
Category 5-equivalent super typhoon (SSHWS)
 
DurationSeptember 19 – September 30
Peak intensity280 km/h (175 mph) (1-min);
895 hPa (mbar)

The strongest storm of the season, Hope was a very strong category 5 super typhoon with pressure reaching 895 mbar. Hope did not affect land and stayed well out to sea. It formed in September 19 and dissipated on September 30.

Tropical Depression Ruping

[edit]
Tropical depression (JMA)
 
DurationSeptember 18 – September 28
Peak intensity55 km/h (35 mph) (10-min);
1000 hPa (mbar)

Typhoon Iris

[edit]
Typhoon (JMA)
Category 3-equivalent typhoon (SSHWS)
 
DurationOctober 2 – October 8
Peak intensity185 km/h (115 mph) (1-min);
960 hPa (mbar)

Iris was the first typhoon to develop over the South China Sea in October since 1957.[2] Iris developed on the 2nd due to a shear line. It intensified while slowly traveling northwards, reaching its maximum intensity on the afternoon of the 6th while 140 miles south of Hong Kong. The conditions around the system rapidly became unfavorable after that, and it weakened quickly, finally dissipating on the 9th.[2]

Tropical Depression 20W

[edit]
Tropical depression (JMA)
Tropical depression (SSHWS)
 
DurationOctober 4 – October 10
Peak intensity55 km/h (35 mph) (10-min);
1004 hPa (mbar)

Typhoon Joan (Sening)

[edit]
Typhoon (JMA)
Category 5-equivalent super typhoon (SSHWS)
 
DurationOctober 9 – October 18
Peak intensity280 km/h (175 mph) (1-min);
905 hPa (mbar)
Main article: Typhoon Joan

A tropical disturbance organized into Tropical Storm Joan on October 10, east of the Philippines. Conditions favored strengthening, and Joan reached typhoon status on the 11th. From late on the 11th to early on the 13th, Typhoon Joan rapidly intensified to a 175 mph Super Typhoon. It struck the southeastern Luzon at that intensity on the 13th, and crossed the archipelago. After weakening to a minimal typhoon, Joan turned to the northwest, where it reintensified to a 115 mph typhoon. It made landfall on eastern Hainan Island on the 16th, and dissipated on the 18th over China. Joan left 768 people dead (with 193 missing), and caused $74 million in damage (1970 USD), mostly from agricultural losses.

Typhoon Kate (Titang)

[edit]
Typhoon (JMA)
Category 4-equivalent typhoon (SSHWS)
 
DurationOctober 14 – October 26
Peak intensity240 km/h (150 mph) (1-min);
940 hPa (mbar)
Main article: Typhoon Kate

Tropical Storm Kate developed just behind Typhoon Joan, east of the southern Philippines on October 14. It tracked westward as a small cyclone, and strengthened into a typhoon on the 15th. It made landfall twice, once in the Philippines and once in Vietnam, resulting in at least 631 fatalities (with 284 missing) and $50 million in damage.

Typhoon Louise (Uding)

[edit]
Typhoon (JMA)
Tropical storm (SSHWS)
 
DurationOctober 23 – October 29
Peak intensity110 km/h (70 mph) (1-min);
990 hPa (mbar)

Typhoon Louise (classified as a tropical storm by the JTWC) formed as a disturbance east of the Philippines. The disturbance traveled across them before it became a tropical storm over the South China Sea. It made landfall in South Vietnam and dissipated over the Gulf of Thailand.[2]

Severe Tropical Storm Marge (Wening)

[edit]
Severe tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationOctober 27 – November 8
Peak intensity100 km/h (65 mph) (1-min);
990 hPa (mbar)

Tropical Storm Marge followed a similar path to Louise. It formed over the Pacific, becoming a tropical depression south of Guam. It became a tropical storm 3 days later, then crossed southern Luzon before dissipating over the South China Sea off the Vietnamese coast.

Tropical Storm Nora

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationNovember 1 – November 4
Peak intensity95 km/h (60 mph) (1-min);
1000 hPa (mbar)

Tropical Storm Nora formed south of Vietnam and began to strengthen, becoming a tropical storm the next day. The system passed south of Cape Cà Mau as a tropical storm before weakening and dissipating over the Gulf of Thailand.[2] The remnants of Nora then crossed the Malay Peninsula on the 5th, and contributed to the formation of the 1970 Bhola cyclone on the 8th, which devastated East Pakistan (Modern day Bangladesh).

Severe Tropical Storm Opal

[edit]
Severe tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationNovember 11 – November 17
Peak intensity95 km/h (60 mph) (1-min);
990 hPa (mbar)

Tropical Storm Opal formed as a disturbance over the sea east of Mindanao, then crossed the Philippines before becoming a depression over the South China Sea. It intensified into a tropical storm as it turned southwestward over the South China Sea, passing close to Vietnam, but it dissipated southeast of the Mekong Delta.

Typhoon Patsy (Yoling)

[edit]
Typhoon (JMA)
Category 4-equivalent typhoon (SSHWS)
 
DurationNovember 14 – November 22
Peak intensity250 km/h (155 mph) (1-min);
910 hPa (mbar)
Main article: Typhoon Patsy

A tropical disturbance organized into Tropical Depression 27W on November 14 near the Marianas Islands. A strong ridge to its north forced it westward, where it strengthened to tropical storm status later on the 14th. Patsy steadily intensified, reaching typhoon strength on the 16th and peaking at 155 mph on the 18th. Its inflow became disrupted by the Philippines to its west, and Patsy hit Luzon on the 19th with winds of 130 mph, making it the 3rd strong typhoon since September to strike the island. After crossing the island, Patsy traversed the South China Sea, where cooler waters kept the system a tropical storm. On November 22, Patsy struck Vietnam, and dissipated soon after. Typhoon Patsy was one of the deadliest typhoons to strike the Philippines in its history. 611 people were killed (with 351 missing) on the island, and 135 people were killed at sea due to shipping failures. Because the Vietnam War was raging at that time, it is difficult to say about the damage or death toll, but estimates say that 30 people died in Vietnam.

Tropical Storm Ruth (Aning)

[edit]
Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationNovember 24 – November 29
Peak intensity75 km/h (45 mph) (1-min);
996 hPa (mbar)

Tropical Storm Ruth formed as a disturbance far at sea, then slowly travelled westward, but it did not intensify into a tropical depression until it was in the South China Sea. It briefly became a tropical storm south of the Mekong Delta, but it weakened into a tropical depression before it crossed just south of Cape Cà Mau. The remnants of Ruth dissipated just off the coast of Thailand.

Tropical Depression Bidang

[edit]
Tropical depression (JMA)
 
DurationDecember 15 – December 19
Peak intensity55 km/h (35 mph) (10-min);
1002 hPa (mbar)

Other systems

[edit]

According to the Japan Meteorological Agency, on September 2 Tropical Cyclone Dot briefly crossed the International Date Line from the Central Pacific into its area of responsibility, crossing back later that day.[4]

Storm names

[edit]

Western North Pacific tropical cyclones were named by the Joint Typhoon Warning Center. The first storm of 1970 was named Nancy and the final one was named Ruth.

  • Agnes
  • Bonnie
  • Carmen
  • Della
  • Elaine
  • Faye
  • Gloria
  • Hester
  • Irma
  • Judy
  • Kit
  • Lola
  • Mamie
  • Nina
  • Ora
  • Phyllis
  • Rita
  • Susan
  • Tess
  • Viola
  • Winnie
  • Alice
  • Betty
  • Cora
  • Doris
  • Elsie
  • Flossie
  • Grace
  • Helen
  • Ida
  • June
  • Kathy
  • Lorna
  • Marie
  • Nancy 1W
  • Olga 2W
  • Pamela 3W
  • Ruby 4W
  • Sally 5W
  • Therese 8W
  • Violet 9W
  • Wilda 10W
  • Anita 11W
  • Billie 12W
  • Clara 13W
  • Dot 14C
  • Ellen 15W
  • Fran 16W
  • Georgia 17W
  • Hope 18W
  • Iris 19W
  • Joan 21W
  • Kate 22W
  • Louise 23W
  • Marge 24W
  • Nora 25W
  • Opal 26W
  • Patsy 27W
  • Ruth 28W
  • Sarah
  • Thelma
  • Vera
  • Wanda
  • Amy
  • Babe
  • Carla
  • Dinah
  • Emma
  • Freda
  • Gilda
  • Harriet
  • Ivy
  • Jean
  • Kim
  • Lucy
  • Mary
  • Nadine
  • Olive
  • Polly
  • Rose
  • Shirley
  • Trix
  • Virginia
  • Wendy

One Central Pacific System developed, Hurricane Dot. The policy at that time was to use Western Pacific Names for the Central Pacific.

Philippines

[edit]
Atang Bising Klaring Deling Emang
Gading Heling Iliang Loleng Miding
Norming Oyang Pitang Ruping Sening
Titang Uding Wening Yoling
Auxiliary list
Aning
Bidang Kading (unused) Delang (unused) Esang (unused) Garding (unused)

The Philippine Atmospheric, Geophysical and Astronomical Services Administration uses its own naming scheme for tropical cyclones in their area of responsibility. PAGASA assigns names to tropical depressions that form within their area of responsibility and any tropical cyclone that might move into their area of responsibility. Should the list of names for a given year prove to be insufficient, names are taken from an auxiliary list, the first 6 of which are published each year before the season starts. Names not retired from this list will be used again in the 1974 season. This is the same list used for the 1966 season. PAGASA uses its own naming scheme that starts in the Filipino alphabet, with names of Filipino female names ending with "ng" (A, B, K, D, etc.). Names that were not assigned/going to use are marked in gray.

Retirement

[edit]

Due to the severe damage in the Philippines, PAGASA later retired the names Pitang, Sening, Titang, and Yoling. Those were replaced by Pasing, Susang, Tering, and Yaning for the 1974 season. This season had the most retired names by PAGASA at that time.

Season effects

[edit]

This table will list all the storms that developed in the northwestern Pacific Ocean west of the International Date Line and north of the equator during 1970. It will include their intensity, duration, name, areas affected, deaths, missing persons (in parentheses), and damage totals. Classification and intensity values will be based on estimations conducted by the JMA, however due to lack of information around this time sustained winds were recorded by the JTWC. All damage figures will be in 1970 USD. Damages and deaths from a storm will include when the storm was a precursor wave or an extratropical low.

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
TD January 1 – 2 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD January 9 Tropical depression Not specified 1010 hPa (29.83 inHg) None None None
Nancy February 19 – 28 Typhoon 220 km/h (140 mph) 950 hPa (28.05 inHg) Caroline Islands, Philippines $160,000 None
TD March 14 – 17 Tropical depression Not specified 1004 hPa (29.65 inHg) Palau, Philippines None None
Bising June 11 – 13 Tropical depression 55 km/h (35 mph) 997 hPa (29.44 inHg) Taiwan None None
TD June 23 – 24 Tropical depression Not specified 1008 hPa (29.77 inHg) Philippines None None
Olga (Deling) June 27 – July 5 Typhoon 260 km/h (160 mph) 905 hPa (26.72 inHg) Caroline Islands, Ryukyu Islands, Japan, South Korea $10 million 49
Pamela (Klaring) June 28 – July 1 Severe tropical storm 95 km/h (60 mph) 980 hPa (28.94 inHg) Philippines Unknown Unknown
TD July 9 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD July 10 – 11 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
Ruby (Emang) July 11 – 17 Severe tropical storm 100 km/h (65 mph) 985 hPa (29.09 inHg) Philippines, South China None None
TD July 10 – 12 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD July 15 – 30 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Sally July 19 – 23 Tropical storm 75 km/h (45 mph) 992 hPa (29.29 inHg) None None None
TD July 19 – August 2 Tropical depression Not specified 996 hPa (29.65 inHg) None None None
07W (Gading) July 25 – August 2 Tropical depression 85 km/h (50 mph) 996 hPa (29.41 inHg) Taiwan, East China None None
06W July 28 – August 1 Tropical storm 75 km/h (45 mph) 994 hPa (29.35 inHg) Ryukyu Islands None None
TD July 29 Tropical depression Not specified 1006 hPa (29.71 inHg) Ryukyu Islands None None
Therese August 1 – 4 Tropical storm 75 km/h (45 mph) 990 hPa (29.23 inHg) None None None
TD August 1 Tropical depression Not specified 1000 hPa (29.71 inHg) None None None
TD August 3 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
Violet (Heling) August 3 – 9 Tropical storm 75 km/h (45 mph) 992 hPa (29.29 inHg) Philippines, South China None None
TD August 6 – 9 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Wilda (Iliang) August 9 – 15 Typhoon 195 km/h (120 mph) 940 hPa (27.76 inHg) Ryukyu Islands, Japan Unknown 11
TD August 11 – 16 Tropical depression Not specified 1004 hPa (29.65 inHg) Philippines None None
TD August 12 – 16 Tropical depression Not specified 1004 hPa (29.65 inHg) Vietnam None None
TD August 12 – 15 Tropical depression Not specified 1006 hPa (29.71 inHg) Mariana Islands None None
TD August 14 – 19 Tropical depression Not specified 997 hPa (29.44 inHg) Vietnam None None
TD August 14 – 16 Tropical depression Not specified 1004 hPa (29.65 inHg) Ryukyu Islands None None
Anita August 15 – 22 Typhoon 250 km/h (155 mph) 910 hPa (26.87 inHg) Japan None 31
TD August 15 – 20 Tropical depression Not specified 1006 hPa (29.71 inHg) Japan None None
TD August 18 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Billie (Loleng) August 21 – 31 Typhoon 205 km/h (125 mph) 945 hPa (27.91 inHg) Ryukyu Islands, Korean Peninsula Unknown Unknown
TD August 21 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
Clara August 25 – September 4 Typhoon 155 km/h (100 mph) 960 hPa (28.35 inHg) None None None
TD August 25 – 31 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
TD August 25 – 26 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Miding August 31 – September 2 Tropical depression 55 km/h (35 mph) 996 hPa (29.41 inHg) Taiwan None None
Dot September 2 Severe ropical storm 75 km/h (45 mph) 1004 hPa (29.65 inHg) None None None
Fran (Norming) September 3 – 10 Severe tropical storm 100 km/h (65 mph) 975 hPa (28.79 inHg) Ryukyu Islands, Taiwan, East China None None
TD September 3 Tropical depression Not specified 1000 hPa (29.53 inHg) Laos None None
Ellen (Oyang) September 3 – 6 Tropical storm 85 km/h (50 mph) 985 hPa (29.09 inHg) Ryukyu Islands None None
TD September 4 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
Georgia (Pitang) September 7 – 16 Typhoon 260 km/h (160 mph) 905 hPa (26.72 inHg) Philippines, China $1.4 million 95
TD September 11 – 13 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD September 13 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD September 16 – 24 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
Ruping September 18 – 28 Tropical depression 45 km/h (30 mph) 1000 hPa (29.53 inHg) Philippines None None
Hope September 19 – 30 Typhoon 280 km/h (175 mph) 895 hPa (26.43 inHg) None None None
TD September 27 – October 4 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
TD October 1 – 4 Tropical depression Not specified 1002 hPa (29.59 inHg) None None None
Iris October 2 – 8 Typhoon 185 km/h (115 mph) 960 hPa (28.35 inHg) South China None None
TD October 4 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
20W October 4 – 10 Tropical depression 45 km/h (35 mph) 1004 hPa (29.65 inHg) None None None
TD October 7 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Joan (Sening) October 9 – 18 Typhoon 280 km/h (175 mph) 905 hPa (26.72 inHg) Caroline Islands, Philippines, South China $74 million 768
TD October 12 Tropical depression Not specified 1006 hPa (29.71 inHg) Vietnam None None
TD October 14 – 19 Tropical depression Not specified 1002 hPa (29.59 inHg) None None None
Kate (Titang) October 14 – 26 Typhoon 240 km/h (150 mph) 940 hPa (27.76 inHg) Philippines $50 million 631
TD October 18 – 19 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD October 18 – 19 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
TD October 23 – 24 Tropical depression Not specified 1010 hPa (29.83 inHg) None None None
Louise (Uding) October 23 – 29 Typhoon 110 km/h (70 mph) 990 hPa (29.23 inHg) Philippines, Vietnam, Laos None None
Marge (Wening) October 27 – November 8 Severe tropical storm 100 km/h (65 mph) 990 hPa (29.23 inHg) Philippines, Vietnam None None
TD October 27 – 29 Tropical depression Not specified 1012 hPa (29.88 inHg) None None None
TD October 29 – 30 Tropical depression Not specified 1012 hPa (29.88 inHg) None None None
Nora November 1 – 4 Tropical storm 95 km/h (60 mph) 1000 hPa (29.53 inHg) Vietnam, Thailand None None
TD November 3 – 5 Tropical depression Not specified 1006 hPa (29.71 inHg) None None None
Opal November 11 – 17 Severe tropical storm 95 km/h (60 mph) 990 hPa (29.23 inHg) Vietnam None None
TD November 11 – 12 Tropical depression Not specified 1012 hPa (29.88 inHg) None None None
TD November 14 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
Patsy (Yoling) November 14 – 22 Typhoon 250 km/h (155 mph) 910 hPa (26.87 inHg) Mariana Islands, Philippines, Vietnam $80 million 262
Ruth (Aning) November 24 – 29 Tropical storm 75 km/h (45 mph) 996 hPa (29.41 inHg) None None None
TD December 2 – 3 Tropical depression Not specified 1008 hPa (29.77 inHg) None None None
TD December 2 – 3 Tropical depression Not specified 1004 hPa (29.65 inHg) None None None
Bidang December 15 – 19 Tropical depression 55 km/h (35 mph) 1002 hPa (29.59 inHg) None None None
Season aggregates
76 systems January 1 – December 19, 1970 280 km/h (175 mph) 895 hPa (26.43 inHg) >$216 million >1,847

See also

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References

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  1. ^ National Climatic Data Center (2013). "Nancy IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  2. ^ a b c d e f g h i j k l Joint Typhoon Warning Center (1971). "Annual Typhoon Report 1970" (PDF). United States Navy. Retrieved 2020-10-29.
  3. ^ National Climatic Data Center (2013). "Olga IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 11 July 2013.
  4. ^ JMA Best Track Data (Text)
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