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1970 Pacific typhoon season

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1970 Pacific typhoon season
Season summary map
Seasonal boundaries
First system formedFebruary 19, 1970
Last system dissipatedDecember 17, 1970
Strongest storm
NameHope
 • Maximum winds280 km/h (175 mph)
(1-minute sustained)
 • Lowest pressure895 hPa (mbar)
Seasonal statistics
Total depressions30
Total storms24
Typhoons12
Super typhoons7 (unofficial)
Total fatalities3,909 total
Total damageUnknown
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 date line. 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

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)

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]

CMA Tropical Depression Two

Tropical depression (CMA)
 
DurationMarch 15 – March 17
Peak intensity35 km/h (25 mph) (10-min);
1004 hPa (mbar)

On March 14 the CMA started to track an area of disturbed weather east of Yap. It moved in a northwest direction before tracking over Yap on March 15 at which point it had become a tropical depression. Continuing to track in a northwest direction it eventually reached a peak intensity of 25 mph (40 km/h) and a pressure of 1,004 hPa (29.6 inHg) on March 16. Late on March 17 the depression moved into the Philippines.[3]

CMA Tropical Storm 03

Tropical storm (CMA)
 
DurationJune 11 – June 16
Peak intensity75 km/h (45 mph) (10-min);
992 hPa (mbar)

On June 11 the CMA began tracking a tropical depression in the South China Sea, west of Luzon. The depression moved northeast toward Taiwan. Early on June 13 the HKO started to track the depression while the CMA had upgraded it into a tropical storm. Not long after, the storm passed over Taiwan and weakened back to a depression. It regained strength on June 14, while the HKO stopped tracking it, the CMA continued to monitor its intensification. By midday it reached a peak strength of 45 mph (75 km/h) and a pressure of 992 hPa (29.3 inHg) while located to the south of the Korean Peninsula. The tropical storm passed over the island of Jeju and brushed the southern tip of South Korea. While in the Yellow Sea the storm weakened back to a depression and sharply curved toward Shandong before dissipating on June 16.[4]

Tropical Depression Bising

Tropical depression (PAGASA)
 
DurationJune 13 – June 17
Peak intensity55 km/h (35 mph) (10-min);
1000 hPa (mbar)

The CMA tracked a weak depression in the South China Sea a few days following Tropical Storm Three. It took a similar track to the east-northeast toward Luzon. It reached a peak intensity of 35 mph (55 km/h) and a pressure of 1,000 hPa (30 inHg) on June 15. It took a turn to the northwest off the coast of Taiwan which then brought it inland. It dissipated on June 17 north of Taiwan.[5]

CMA Tropical Depression Five

Tropical depression (CMA)
 
DurationJune 20 – June 22
Peak intensity35 km/h (25 mph) (10-min);
1002 hPa (mbar)

Following a string of storms in the South China Sea another depression formed on June 20. It moved north-northwest, reaching a peak of 25 mph (40 km/h) and a pressure of 1,002 hPa (29.6 inHg), before making landfall on Hainan. It took a curved path in the Gulf of Tonkin which lead it to make its second landfall in Vietnam.[6]

Typhoon Olga (Deling)

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 of these waves would become 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, though the JMA had classified it a tropical depression two days earlier. Later that day reconnaissance had detected a closed center and gale force winds and the low was upgraded to 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. Moving into an increasingly favorable environment, the storm slowed in its forward speed, and strengthened into a typhoon late on June 29. Rapid intensification followed as the system bottomed out at a pressure of 906 hPa (26.8 inHg) and winds of 160 mph (260 km/h) on July 1.[7] The strengthening happened within a little over a day brought it to a super typhoon, the first of the season. The 62 millibar drop with the day of June 30 and July 1 caused a very high wind profile around the six mile radius eye. The storm followed a break in the ridge and moved northward while weakening gradually. While passing to the east of Taiwan a short wave from the Chinese mainland caused a sharp direction change in Olga's path. A low developed in the wake of the short wave, dominated Olga causing the typhoon to greatly weaken. Dry air soon entered the circulation caused a shallowing in the systems overall convection. By July 5 Olga made landfall on the Kansai region, south of Osaka, as a tropical storm. The system continued into the Sea of Japan, and became merged within 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 measurement were as high as 130 mph (205 km/h) as it passed 50 miles to the west on July 4. Heavy rains occurred over Japan, up to 14 inches, caused landslides and extensive flooding in some areas, as well as in South Korea. In Japan 20 fatalities were recorded and in South Korea 29 were recorded due to the extreme rainfall.[2]

Severe Tropical Storm Pamela (Klaring)

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

Severe Tropical Storm Ruby (Emang)

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

Tropical Storm Sally

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

Tropical Storm Therese

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

Tropical Storm Violet (Heling)

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

Typhoon Wilda (Iliang)

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

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)

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

Typhoon Clara

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 Storm Ellen (Norming)

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

Severe Tropical Storm Fran (Oyang)

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

Typhoon Georgia (Pitang)

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

On September 11, Super Typhoon Georgia, which formed on the 8th, struck northern Luzon with winds of 160 mph. It weakened over the island, turned to the northwest, and hit southern China as a strong tropical storm on the 13th. Georgia produced little rain over the Philippines, but its strong winds caused 95 casualties (with 80 missing) and damage at $1.4 million (1970 USD).

Typhoon Hope

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

Tropical depression (PAGASA)
 
DurationSeptember 21 – September 25
Peak intensity55 km/h (35 mph) (10-min);

Typhoon Iris

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

Typhoon Joan (Sening)

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 (1970)

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)

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 (1970)

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

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

Severe Tropical Storm Marge (Uding)

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

Tropical Storm Nora

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

The remnants of Tropical Storm Nora contributed to the formation of the 1970 Bhola cyclone which devastated Bangladesh.

Severe Tropical Storm Opal

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

Typhoon Patsy (Yoling)

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 (1970)

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, its difficult to say about the damage or death toll, but estimates say that 30 people died in Vietnam.

Tropical Depression Aning

Tropical depression (PAGASA)
 
DurationNovember 24 – November 25
Peak intensity55 km/h (35 mph) (10-min);

Tropical Storm Ruth

Tropical storm (JMA)
Tropical storm (SSHWS)
 
DurationNovember 26 – November 29
Peak intensity75 km/h (45 mph) (1-min);
996 hPa (mbar)

Tropical Depression Bidang

Tropical depression (PAGASA)
 
DurationDecember 17 – December 17
Peak intensity55 km/h (35 mph) (10-min);

Other systems

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.[8]

Storm names

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

Akang 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

Due to an extreme impact in the Philippines, PAGASA later retired the names Pitang, Sening, Titang, and Yoling and replaced by Pasing, Susang, Tering, and Yaning for the 1974 season. This season has the most retired names by PAGASA at that time.

Season effects

This is a table of all of the storms that have formed in the 1970 Pacific typhoon season. It includes their duration, names, landfall(s), denoted in parenthesis, damages, and death totals. Deaths in parentheses are additional and indirect, but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a wave, or a low, and all of the damage figures are in 1970 USD.

Name Dates active Peak classification Pressure Land areas affected Damage
(USD) 		Deaths Refs
TD January 1 – 2 Tropical depression 1008 hPa (29.77 inHg) None None None
TD January 9 Tropical depression 1010 hPa (29.83 inHg) None None None
Nancy February 19 – 28 Typhoon 950 hPa (28.05 inHg) None None None
TD March 14 Tropical depression 1008 hPa (29.77 inHg) None None None
TD March 16 – 17 Tropical depression 1004 hPa (29.77 inHg) None None None
TD June 11 – 13 Tropical depression 997 hPa (29.44 inHg) None None None
TD June 23 – 24 Tropical depression 1008 hPa (29.77 inHg) None None None
Olga June 27 – July 5 Typhoon 905 hPa (26.72 inHg) None None None
Pamela June 28 – July 1 Severe tropical storm 980 hPa (28.94 inHg) None None None
TD July 9 Tropical depression 1008 hPa (29.77 inHg) None None None
TD July 10 – 11 Tropical depression 1008 hPa (29.77 inHg) None None None
Ruby July 11 – 17 Severe tropical storm 985 hPa (29.09 inHg) None None None
TD July 10 – 12 Tropical depression 1008 hPa (29.77 inHg) None None None
TD July 15 – 25 Tropical depression 1004 hPa (29.65 inHg) None None None
Sally July 19 – 23 Tropical storm 992 hPa (29.29 inHg) None None None
TD July 19 – August 3 Tropical depression 996 hPa (29.65 inHg) None None None
TD July 25 – 31 Tropical depression 1006 hPa (29.71 inHg) None None None
TD July 25 – August 2 Tropical depression 1006 hPa (29.71 inHg) None None None
TS 7006 July 28 – August 1 Tropical storm 994 hPa (29.35 inHg) None None None
TD July 29 Tropical depression 1006 hPa (29.71 inHg) None None None
Therese August 1 – 4 Tropical storm 990 hPa (29.23 inHg) None None None
TD August 1 Tropical depression 1000 hPa (29.71 inHg) None None None
TD August 3 Tropical depression 1008 hPa (29.77 inHg) None None None
Violet August 3 – 9 Tropical storm 992 hPa (29.29 inHg) None None None
TD August 6 – 8 Tropical depression 1002 hPa (29.59 inHg) None None None
TD August 6 Tropical depression 1006 hPa (29.71 inHg) None None None
Wilda August 9 – 15 Typhoon 940 hPa (27.76 inHg) None None None
TD August 11 – 13 Tropical depression 1004 hPa (29.65 inHg) None None None
TD August 12 – 13 Tropical depression 1004 hPa (29.65 inHg) None None None
TD August 12 – 15 Tropical depression 1006 hPa (29.71 inHg) None None None
TD August 14 – 15 Tropical depression 1004 hPa (29.65 inHg) None None None
TD August 14 – 16 Tropical depression 1004 hPa (29.65 inHg) None None None
TD August 14 – 15 Tropical depression 1004 hPa (29.65 inHg) None None None
Anita August 15 – 22 Typhoon 910 hPa (26.87 inHg) None None None
TD August 15 – 18 Tropical depression 1008 hPa (29.77 inHg) None None None
TD August 15 – 16 Tropical depression 1002 hPa (29.59 inHg) None None None
TD August 16 – 19 Tropical depression 997 hPa (29.44 inHg) None None None
TD August 17 – 18 Tropical depression 1004 hPa (29.65 inHg) None None None
TD August 18 – 20 Tropical depression 1006 hPa (29.71 inHg) None None None
Billie August 21 – 31 Typhoon 945 hPa (27.91 inHg) None None None
TD August 21 – 26 Tropical depression 1000 hPa (29.53 inHg) None None None
TD August 21 Tropical depression 1008 hPa (29.77 inHg) None None None
Clara August 25 – September 4 Typhoon 960 hPa (28.35 inHg) None None None
TD August 25 – 31 Tropical depression 1004 hPa (29.65 inHg) None None None
TD September 1 – 2 Tropical depression 996 hPa (29.41 inHg) None None None
Dot September 2 Tropical storm 1004 hPa (29.65 inHg) None None None
Fran September 3 – 10 Severe tropical storm 975 hPa (28.79 inHg) None None None
TD September 3 Tropical depression 1000 hPa (29.53 inHg) None None None
TD September 3 – 5 Tropical depression 996 hPa (29.41 inHg) None None None
Ellen September 3 – 6 Tropical storm 985 hPa (29.09 inHg) None None None
TD September 4 Tropical depression 1006 hPa (29.71 inHg) None None None
TD September 4 Tropical depression 1010 hPa (29.83 inHg) None None None
Georgia September 7 – 16 Typhoon 905 hPa (26.72 inHg) None None None
TD September 11 Tropical depression 1008 hPa (29.77 inHg) None None None
TD September 13 Tropical depression 1008 hPa (29.77 inHg) None None None
TD September 16 – 24 Tropical depression 1006 hPa (29.71 inHg) None None None
TD September 18 Tropical depression 1010 hPa (29.83 inHg) None None None
TD September 18 – 25 Tropical depression 1000 hPa (29.53 inHg) None None None
Hope September 19 – 30 Typhoon 895 hPa (26.43 inHg) None None None
TD September 26 – 28 Tropical depression 1002 hPa (29.59 inHg) None None None
TD September 27 – October 4 Tropical depression 1004 hPa (29.65 inHg) None None None
TD October 1 – 4 Tropical depression 1002 hPa (29.59 inHg) None None None
Iris October 2 – 8 Typhoon 960 hPa (28.35 inHg) None None None
TD October 4 Tropical depression 1006 hPa (29.71 inHg) None None None
TD October 4 – 7 Tropical depression 1004 hPa (29.65 inHg) None None None
TD October 7 Tropical depression 1004 hPa (29.65 inHg) None None None
TD October 7 – 10 Tropical depression 1000 hPa (29.53 inHg) None None None
Joan October 9 – 18 Typhoon 905 hPa (26.72 inHg) None None None
TD October 12 Tropical depression 1006 hPa (29.71 inHg) None None None
TD October 14 – 16 Tropical depression 1002 hPa (29.59 inHg) None None None
Kate October 14 – 26 Typhoon 940 hPa (27.76 inHg) None None None
TD October 18 – 19 Tropical depression 1008 hPa (29.77 inHg) None None None
TD October 18 – 19 Tropical depression 1008 hPa (29.77 inHg) None None None
TD October 18 – 19 Tropical depression 1006 hPa (29.71 inHg) None None None
TD October 21 Tropical depression 1008 hPa (29.77 inHg) None None None
TD October 23 – 24 Tropical depression 1010 hPa (29.83 inHg) None None None
Louise October 23 – 29 Typhoon 990 hPa (29.23 inHg) None None None
Marge October 27 – November 8 Severe tropical storm 990 hPa (29.23 inHg) None None None
TD October 27 – 28 Tropical depression 1012 hPa (29.88 inHg) None None None
TD October 29 – 30 Tropical depression 1012 hPa (29.88 inHg) None None None
Nora November 1 – 4 Tropical storm 1000 hPa (29.53 inHg) None None None
TD November 3 – 5 Tropical depression 1006 hPa (29.71 inHg) None None None
Opal November 11 – 17 Severe tropical storm 990 hPa (29.23 inHg) None None None
TD November 11 – 12 Tropical depression 1012 hPa (29.88 inHg) None None None
TD November 14 Tropical depression 1008 hPa (29.77 inHg) None None None
Patsy November 14 – 22 Typhoon 910 hPa (26.87 inHg) None None None
Ruth November 26 – 29 Tropical storm 996 hPa (29.41 inHg) None None None
TD December 2 – 3 Tropical depression 1008 hPa (29.77 inHg) None None None
TD December 2 – 3 Tropical depression 1004 hPa (29.65 inHg) None None None
TD December 15 – 19 Tropical depression 1002 hPa (29.59 inHg) None None None
Season Aggregates
89 systems January 1 –December 19 900 hPa (26.58 inHg)


References

  1. ^ National Climatic Data Center (2013). "Nancy IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  2. ^ a b c d Joint Typhoon Warning Center (1971). "Annual Typhoon Report 1970" (PDF). United States Navy. Retrieved 2013-06-23.
  3. ^ National Climatic Data Center (2013). "CMA TD 2 IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  4. ^ National Climatic Data Center (2013). "CMA TS 3 IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  5. ^ National Climatic Data Center (2013). "CMA TD 4 IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  6. ^ National Climatic Data Center (2013). "CMA TD 5 IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 23 June 2013.
  7. ^ National Climatic Data Center (2013). "Olga IBTrACS File". National Oceanic and Atmospheric Administration. Retrieved 11 July 2013.
  8. ^ JMA Best Track Data (Text)
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