EASTERN PACIFIC SEASON MAP
1958 Pacific hurricane season
13 recorded storms from Jun 6, 1958 to Oct 30, 1958
Last updated
The 1958 Pacific hurricane season produced 13 tropical storms and 5 hurricanes, none of them major. A September hurricane peaked at 90 kt, the season's strongest, and activity ran from 6 June to 30 October. Storms struck southern Mexico, flooded Hilo and carried rain into southern California and New Mexico. Read more
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| Unnamed | – | 86 | Cat 1 | 992 | 1,460 |
|---|---|---|---|---|---|
| Unnamed | – | 52 | Tropical storm | — | 450 |
| Unnamed | – | 86 | Cat 1 | — | 710 |
| Unnamed | – | 86 | Cat 1 | — | 790 |
| Unnamed | – | 52 | Tropical storm | — | 1,300 |
| Unnamed | – | 52 | Tropical storm | — | 330 |
| Unnamed | – | 52 | Tropical storm | — | 470 |
| Unnamed | – | 52 | Tropical storm | — | 420 |
| Unnamed | – | 104 | Cat 2 | — | 1,090 |
| Unnamed | – | 52 | Tropical storm | — | 610 |
| Unnamed | – | 86 | Cat 1 | — | 1,840 |
| Unnamed | – | 52 | Tropical storm | — | 800 |
| Unnamed | – | 52 | Tropical storm | — | 300 |
13 storms with an IBTrACS 1958 hurricane season record. Tracks are the archived center positions, first observation Jun 6, 1958, last Oct 30, 1958.
Tropical-stage US-agency wind of 39 mph or more
74 mph or more, one-minute sustained
110 mph or more, Saffir–Simpson scale
158 mph or more at any tropical-stage observation
104 mph
Unnamed, Jun 7, 1958
Unnamed, full archive record
Mapped, but outside the counts above
SEASON HISTORY
Thirteen storms in the record
The archive records 13 tropical storms, five of which reached hurricane strength, for an accumulated cyclone energy of 75.8. The current best track also counts thirteen systems. Its storm list adds Typhoon June, a western Pacific storm that crossed the Date Line briefly on 20 September and does not count toward this basin's total on the site.
The strongest storm, a hurricane from 6 to 13 September, peaked at 90 kt on 8 September. The lowest pressure in the archive, 992 hPa, belongs to the June hurricane, the season's first, which hit southern Mexico as a tropical storm on 14 June.
A July run west of Mexico
Ship observations pinned down several July storms. The ship Waitemata found a hurricane near 18°N, 129°W on 19 July, and it tracked west to about 139°W by 21 July. Another storm organized near 19°N, 125°W, reached hurricane strength on 23 July for about a day and broke down into squalls near 24°N, 136°W on 25 July.
A tropical storm located about 140 miles west of Acapulco on 26 July held winds of 45 to 55 kt as it moved northwest off the coast, then broke up near 26°N, 117°W on 30 July. Its moisture brought 2 inches of rain to Barton Flats in southern California, where floods and mudslides buried five cars, covered part of U.S. Route 66 and entered buildings.
Hilo floods and a hurricane over Baja California
A tropical storm developed just east of Hawaii on 7 August and moved west into Hilo, where the island disrupted its circulation. The weakened system lingered two more days and caused heavy flooding.
A tropical storm moved up the Baja California coast in mid-September. From 30 September to 5 October a hurricane tracked north through Baja California and mainland Mexico and dissipated over New Mexico; it killed two people and destroyed at least 30 houses. The season closed when a tropical storm hit southwestern Mexico on 30 October.
Further reading
QUICK ANSWERS
The 1958 season in brief
How many hurricanes were there in the 1958 Pacific hurricane season?
The archive records 5 hurricanes (one-minute winds of 74 mph or more) among 13 tropical storms, with 0 major hurricanes reaching 110 mph. Counts use US-agency winds during the tropical stage.
What was the strongest storm of the 1958 Pacific hurricane season?
Unnamed, with a peak one-minute sustained wind of 104 mph (Category 2) on Sep 8, 1958, 06:00 PM UTC.
How many Category 5 storms were there in 1958?
None. No storm in the 1958 Pacific hurricane season reached Category 5 on the Saffir–Simpson one-minute wind scale in the archive.
When did the 1958 Pacific hurricane season start and end?
The first tropical-stage observation is on Jun 6, 1958 and the last on Oct 30, 1958, from 13 tracked storms in the archive.
What was the first hurricane of the 1958 Pacific hurricane season?
Unnamed, which reached hurricane strength (74 mph) on Jun 6, 1958, 12:00 AM 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 1958 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 and Field documentation
Sources & methodology