hurricanesmapped

EASTERN PACIFIC · SEASON MAP

1977 Pacific hurricane season

Every recorded track, mapped · 17 storms · 25 May 1977–23 Oct 1977

ACCUMULATED CYCLONE ENERGY22.3
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1977 Pacific hurricane season: every recorded storm trackRecorded tracks of all 17 storms, colored by the wind category at each observation. Hover or focus a storm in the table to highlight its track.UNITED STATESMEXICOCUBACHINAJAPANPHILIPPINESINDIAGulf of MexicoAtlantic OceanPacific OceanPhilippine SeaArabian SeaBay of BengalAva: 25 May–30 May, peak 55 kt, Tropical stormUnnamed: 30 May–1 Jun, peak 30 kt, Tropical depressionUnnamed: 9 Jun–11 Jun, peak 29 kt, Tropical depressionBernice: 25 Jun–28 Jun, peak 35 kt, Tropical stormClaudia: 3 Jul–7 Jul, peak 80 kt, Category 1Unnamed: 8 Jul–9 Jul, peak 30 kt, Tropical depressionUnnamed: 9 Jul–9 Jul, peak 30 kt, Tropical depressionUnnamed: 25 Jul–25 Jul, peak 25 kt, Tropical depressionUnnamed: 1 Aug–2 Aug, peak 27 kt, Tropical depressionDoreen: 13 Aug–17 Aug, peak 65 kt, Category 1Unnamed: 3 Sep–4 Sep, peak 29 kt, Tropical depressionEmily: 13 Sep–14 Sep, peak 35 kt, Tropical stormUnnamed: 19 Sep–22 Sep, peak 30 kt, Tropical depressionFlorence: 20 Sep–24 Sep, peak 90 kt, Category 2Glenda: 23 Sep–27 Sep, peak 35 kt, Tropical stormHeather: 4 Oct–7 Oct, peak 75 kt, Category 1Unnamed: 22 Oct–23 Oct, peak 30 kt, Tropical depression

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Whole season

DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5Post-tropical
Every storm of the 1977 Pacific hurricane season. Column headers sort the list.
Ava–55Tropical storm997620
Unnamed–30Tropical depression—110
Unnamed–29Tropical depression—190
Bernice–35Tropical storm—950
Claudia–80Cat 1—1,120
Unnamed–30Tropical depression—320
Unnamed–30Tropical depression—90
Unnamed–25Tropical depression—100
Unnamed–27Tropical depression—250
Doreen–65Cat 19791,160
Unnamed–29Tropical depression—310
Emily–35Tropical storm—420
Unnamed–30Tropical depression—800
Florence–90Cat 2—1,020
Glenda–35Tropical storm—1,220
Heather–75Cat 1—1,000
Unnamed–30Tropical depression—60

17 storms with an IBTrACS 1977 hurricane season record. Tracks are the archived center positions, first observation 25 May 1977, last 23 Oct 1977.

Tropical storms8

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

Hurricanes4

64 kt or more, one-minute sustained

Major (Category 3+)0

96 kt or more, Saffir–Simpson scale

Category 50

137 kt or more at any tropical-stage observation

Strongest stormFlorence

90 kt · 104 mph / 167 km/h

Lowest pressure979 hPa

Doreen, 14 Aug 1977

Longest track record5 days

Doreen, full archive record

Storms without US-agency wind0

Mapped, but outside the counts above

QUICK ANSWERS

The 1977 season in brief

How many hurricanes were there in the 1977 Pacific hurricane season?

The archive records 4 hurricanes (one-minute winds of 64 kt or more) among 8 tropical storms, with 0 major hurricanes reaching 96 kt. Counts use US-agency winds during the tropical stage.

What was the strongest storm of the 1977 Pacific hurricane season?

Florence, with a peak one-minute sustained wind of 90 kt (Category 2) on 22 Sept 1977, 18:00 UTC.

How many Category 5 storms were there in 1977?

None. No storm in the 1977 Pacific hurricane season reached Category 5 on the Saffir–Simpson one-minute wind scale in the archive.

When did the 1977 Pacific hurricane season start and end?

The first tropical-stage observation is on 25 May 1977 and the last on 23 Oct 1977, from 17 tracked storms in the archive.

What was the first hurricane of the 1977 Pacific hurricane season?

Claudia, which reached hurricane strength (64 kt) on 4 Jul 1977, 03:00 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 Eastern Pacific basin for the 1977 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 hurricane 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 Eastern 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