Hurricane Isis (1998)

Basin

Eastern Pacific

Dates

August 29, 1998 to September 3, 1998

Peak strength

Category 1, 65 kt (75 mph)

Lowest pressure

988 mb (29.18 inHg)

Landfall

Yes

Accumulated cyclone energy

2.7

Fastest the center moved

12 kt (14 mph)

Identifier

EP101998

The sources count different things and are not added together.

NOAA’s Storm Events database, the record National Weather Service offices compile months after a storm, as compiled March 2026.

Deaths

0 (0 direct, 0 indirect)

Injuries

0

Property damage

none recorded

Crop damage

$5.0 million

Events recorded

1 in 1 reports from 1 states and marine areas

State by state

What was recorded

1 heavy rain.

The Weather Prediction Center attributes 519 rain gauge totals over the contiguous United States to this storm. The wettest reached 3.01 inches (76 mm).

WPC’s storm rainfall file, 1900 to 2020, compiled by David Roth.

• Tropical Storm AgathaEastern Pacific · 1998Tropical Storm55 kt · 993 mb
• Unnamed tropical depressionEastern Pacific · 1998Tropical Depression30 kt
• Hurricane BlasEastern Pacific · 1998Cat 4120 kt · 943 mb
• Tropical Storm CeliaEastern Pacific · 1998Tropical Storm50 kt · 997 mb
• Hurricane DarbyEastern Pacific · 1998Cat 3100 kt · 958 mb
• Hurricane EstelleEastern Pacific · 1998Cat 4115 kt · 948 mb
• Tropical Storm FrankEastern Pacific · 1998Tropical Storm40 kt · 1001 mb
• Hurricane GeorgetteEastern Pacific · 1998Cat 3100 kt · 960 mb
• Unnamed tropical depressionEastern Pacific · 1998Tropical Depression30 kt
• Hurricane HowardEastern Pacific · 1998Cat 4130 kt · 932 mb
• Tropical Storm JavierEastern Pacific · 1998Tropical Storm50 kt · 995 mb
• Unnamed tropical depressionEastern Pacific · 1998Tropical Depression30 kt
• Hurricane MadelineEastern Pacific · 1998Cat 175 kt · 979 mb
• Hurricane KayEastern Pacific · 1998Cat 165 kt · 987 mb
• Hurricane LesterEastern Pacific · 1998Cat 3100 kt · 965 mb

A best track is the record a warning agency settles on after the storm, not what it said at the time: position, maximum sustained wind and central pressure every six hours, revised against every observation that came in later. Category is the Saffir-Simpson scale, which runs from Category 1 at 64 kt to Category 5 at 137 kt and reads wind only, so it says nothing about surge or rain. Accumulated cyclone energy adds up the square of the wind through the storm's life, so it counts strength and duration together.

Storm history from NOAA NCEI’s International Best Track Archive for Climate Stewardship (IBTrACS), which merges the official best track of every warning agency. Live storms, cones, watches and warnings from the National Hurricane Center and the Central Pacific Hurricane Center. Archived radar from NOAA’s Level II archive.

• Tropical cyclone report, National Hurricane Center
• Wikipedia article: Hurricane Isis