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WESTERN PACIFIC · SEASON MAP

1970 Pacific typhoon season

Every recorded track, mapped · 51 storms · 19 Feb 1970–16 Dec 1970

ACCUMULATED CYCLONE ENERGY287.5
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1970 Pacific typhoon season: every recorded storm trackRecorded tracks of all 51 storms, colored by the wind category at each observation. Hover or focus a storm in the table to highlight its track.UNITED STATESCANADAMEXICOAFRICAEUROPECHINAJAPANPHILIPPINESINDIAGulf of MexicoPacific OceanPhilippine SeaArabian SeaBay of BengalNancy: 19 Feb–27 Feb, peak 120 kt, Category 4Unnamed: 16 Mar–17 Mar, no US-agency windUnnamed: 12 Jun–14 Jun, no US-agency windUnnamed: 15 Jun–16 Jun, no US-agency windUnnamed: 22 Jun–24 Jun, no US-agency windPamela: 28 Jun–1 Jul, peak 50 kt, Tropical stormOlga: 28 Jun–5 Jul, peak 140 kt, Category 5Ruby: 11 Jul–16 Jul, peak 55 kt, Tropical stormUnnamed: 12 Jul–12 Jul, no US-agency windUnnamed: 17 Jul–18 Jul, no US-agency windSally: 20 Jul–23 Jul, peak 40 kt, Tropical stormUnnamed: 22 Jul–24 Jul, no US-agency windUnnamed: 25 Jul–31 Jul, no US-agency windUnnamed: 26 Jul–3 Aug, no US-agency windUnnamed: 27 Jul–1 Aug, no US-agency windTherese: 1 Aug–4 Aug, peak 40 kt, Tropical stormUnnamed: 1 Aug–2 Aug, no US-agency windViolet: 4 Aug–9 Aug, peak 40 kt, Tropical stormWilda: 7 Aug–15 Aug, peak 105 kt, Category 3Anita: 16 Aug–22 Aug, peak 135 kt, Category 4Unnamed: 18 Aug–19 Aug, no US-agency windUnnamed: 19 Aug–19 Aug, no US-agency windBillie: 23 Aug–31 Aug, peak 110 kt, Category 3Unnamed: 22 Aug–26 Aug, no US-agency windUnnamed: 26 Aug–28 Aug, no US-agency windClara: 25 Aug–4 Sep, peak 85 kt, Category 2Unnamed: 29 Aug–3 Sep, no US-agency windFran: 1 Sep–7 Sep, peak 55 kt, Tropical stormEllen: 3 Sep–6 Sep, peak 45 kt, Tropical stormUnnamed: 3 Sep–5 Sep, no US-agency windUnnamed: 4 Sep–4 Sep, no US-agency windGeorgia: 7 Sep–16 Sep, peak 140 kt, Category 5Unnamed: 17 Sep–21 Sep, no US-agency windUnnamed: 20 Sep–25 Sep, no US-agency windHope: 18 Sep–30 Sep, peak 150 kt, Category 5Unnamed: 25 Sep–26 Sep, no US-agency windUnnamed: 28 Sep–1 Oct, no US-agency windUnnamed: 3 Oct–4 Oct, no US-agency windIris: 2 Oct–8 Oct, peak 100 kt, Category 3Unnamed: 4 Oct–5 Oct, no US-agency windUnnamed: 8 Oct–9 Oct, no US-agency windJoan: 9 Oct–18 Oct, peak 150 kt, Category 5Kate: 13 Oct–25 Oct, peak 130 kt, Category 4Unnamed: 14 Oct–16 Oct, no US-agency windLouise: 23 Oct–29 Oct, peak 60 kt, Tropical stormMarge: 27 Oct–7 Nov, peak 55 kt, Tropical stormNora: 1 Nov–4 Nov, peak 50 kt, Tropical stormOpal: 13 Nov–17 Nov, peak 50 kt, Tropical stormPatsy: 14 Nov–22 Nov, peak 135 kt, Category 4Ruth: 24 Nov–29 Nov, peak 40 kt, Tropical stormUnnamed: 14 Dec–16 Dec, no US-agency wind

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Whole season

DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5Post-tropical
Every storm of the 1970 Pacific typhoon season. Column headers sort the list.
Nancy–120Cat 49502,520
Unnamed–—Unclassified—800
Unnamed–—Unclassified—1,740
Unnamed–—Unclassified—1,050
Unnamed–—Unclassified—630
Pamela–50Tropical storm9801,440
Olga–140Cat 59053,590
Ruby–55Tropical storm9855,620
Unnamed–—Unclassified—1,330
Unnamed–—Unclassified—1,850
Sally–40Tropical storm9921,870
Unnamed–—Unclassified—1,210
Unnamed–—Unclassified—1,330
Unnamed–—Unclassified—1,950
Unnamed–—Unclassified9941,020
Unnamed–—Unclassified—130
Therese–40Tropical storm9902,410
Violet–40Tropical storm9922,010
Wilda–105Cat 39403,940
Anita–135Cat 49103,730
Unnamed–—Unclassified—810
Unnamed–—Unclassified—690
Unnamed–—Unclassified—1,440
Billie–110Cat 39452,310
Clara–85Cat 29602,590
Unnamed–—Unclassified—1,110
Unnamed–—Unclassified—590
Fran–55Tropical storm9752,020
Ellen–45Tropical storm9851,540
Unnamed–—Unclassified—400
Unnamed–—Unclassified—110
Georgia–140Cat 59052,200
Unnamed–—Unclassified—1,330
Hope–150Cat 59003,520
Unnamed–—Unclassified—1,770
Unnamed–—Unclassified—980
Unnamed–—Unclassified—1,520
Iris–100Cat 3960820
Unnamed–—Unclassified—1,670
Unnamed–—Unclassified—170
Unnamed–—Unclassified—1,170
Joan–150Cat 59052,590
Kate–130Cat 49402,580
Unnamed–—Unclassified—1,870
Louise–60Tropical storm9902,120
Marge–55Tropical storm9903,000
Nora–50Tropical storm1000590
Opal–50Tropical storm9901,660
Patsy–135Cat 49102,970
Ruth–40Tropical storm9962,730
Unnamed–—Unclassified—530

51 storms with an IBTrACS 1970 typhoon season record. Tracks are the archived center positions, first observation 19 Feb 1970, last 16 Dec 1970.

Tropical storms24

Tropical-stage US-agency wind of 34 kt or more

Typhoons12

64 kt or more, one-minute sustained

Major (Category 3+)11

96 kt or more, Saffir–Simpson scale

Category 54

137 kt or more at any tropical-stage observation

Strongest stormHope

150 kt · 173 mph / 278 km/h

Lowest pressure900 hPa

Hope, 24 Sept 1970

Longest track record14.3 days

Ruby, full archive record

Storms without US-agency wind27

Mapped, but outside the counts above

QUICK ANSWERS

The 1970 season in brief

How many typhoons were there in the 1970 Pacific typhoon season?

The archive records 12 typhoons (one-minute winds of 64 kt or more) among 24 tropical storms, with 11 major typhoons reaching 96 kt. Counts use US-agency winds during the tropical stage.

What was the strongest storm of the 1970 Pacific typhoon season?

Hope, with a peak one-minute sustained wind of 150 kt (Category 5) on 24 Sept 1970, 00:00 UTC and a minimum central pressure of 900 hPa.

How many Category 5 storms were there in 1970?

4 storms in the 1970 Pacific typhoon season reached Category 5 on the Saffir–Simpson one-minute wind scale: Olga, Georgia, Hope, Joan.

When did the 1970 Pacific typhoon season start and end?

The first tropical-stage observation is on 19 Feb 1970 and the last on 16 Dec 1970, from 51 tracked storms in the archive.

What was the first typhoon of the 1970 Pacific typhoon season?

Nancy, which reached typhoon strength (64 kt) on 22 Feb 1970, 06:00 UTC.

METHODOLOGY

Data sources and limitations

The map and totals are generated from NOAA’s IBTrACS v04r01 archive. A storm belongs to this page when the archive lists it in the Western Pacific basin for the 1970 season, so a December storm whose track ends in January stays with its season. Storms that cross between basins appear on the page of their archive basin only.

Counts use US-agency one-minute winds during the tropical stage: 34 kt for a tropical storm, 64 kt for typhoon strength and 96 kt for major intensity, on the Saffir–Simpson scale in every basin. Local agencies classify storms differently, and official season summaries can differ from the archive. Accumulated cyclone energy sums squared winds at six-hourly synoptic times, counting observations in the calendar year. Storms with no US-agency wind are mapped but cannot enter the counts.

The map frame is the same for every Western Pacific season, so a track that leaves it is cut at the edge. Lines show each storm’s center, not its size, rainfall or flood extent. Coastlines use Natural Earth’s 1:10m land data.

Archive retrieved

NOAA IBTrACS archive · Field documentation

Sources & methodology