27 Aug 2026 - 21:18 EDT
28 Aug 2026 - 01:18 UTC

Post-tropical Cyclone Iselle at 23.0°N - 125.9°W

North Pacific Ocean

Last observation: 27 Aug 2026 - 11:05 UTC

« Active Storms »

23 Aug 2026 - 27 Aug 2026

Links and Animation
PTC Iselle - RGB Loops
PTC Iselle - Channel Loops

Storm images and information

Post-tropical Cyclone Iselle Tropical Pacific Eastern East Pacific GOES-West - All States Download images NHC Storm Maps Auto-refresh link for storm

NHC Storm Description:

PTC Iselle - The NHC has issued its final advisory on this system. Relevant sectors and Mesoscale views are shown here for 7 days beyond the final NHC advisory for reference.

27 Aug 2026 - 3:00 UTC ...ISELLE HAS BECOME A POST-TROPICAL CYCLONE... ...THIS IS THE FINAL NHC ADVISORY ON THE SYSTEM... As of 8:00 PM PDT Wed Aug 26 the center of Iselle was located near 23.0, -125.9 with movement WNW at 9 mph. The minimum central pressure was 1002 mb with maximum sustained winds of about 35 mph.

26 Aug 2026 - 21:00 UTC ...ISELLE CONTINUES TO WEAKEN... ...FORECAST TO BECOME A POST-TROPICAL CYCLONE TONIGHT... As of 2:00 PM PDT Wed Aug 26 the center of Iselle was located near 22.7, -124.9 with movement WNW at 10 mph. The minimum central pressure was 1003 mb with maximum sustained winds of about 40 mph.

More storm history

26 Aug 2026 - 15:00 UTC ...ISELLE WEAKENS... ...FORECAST TO BECOME A POST-TROPICAL CYCLONE TONIGHT... As of 8:00 AM PDT Wed Aug 26 the center of Iselle was located near 22.2, -124.0 with movement WNW at 9 mph. The minimum central pressure was 999 mb with maximum sustained winds of about 45 mph.

26 Aug 2026 - 9:00 UTC ...ISELLE DRIFTING WEST-NORTHWESTWARD... As of 2:00 AM PDT Wed Aug 26 the center of Iselle was located near 21.8, -123.5 with movement WNW at 9 mph. The minimum central pressure was 996 mb with maximum sustained winds of about 50 mph.

26 Aug 2026 - 3:00 UTC ...ISELLE WEAKENS SLIGHTLY... As of 8:00 PM PDT Tue Aug 25 the center of Iselle was located near 21.3, -122.5 with movement WNW at 9 mph. The minimum central pressure was 996 mb with maximum sustained winds of about 50 mph.

25 Aug 2026 - 21:00 UTC ...ISELLE LIKELY TO FURTHER WEAKEN THIS WEEK... As of 2:00 PM PDT Tue Aug 25 the center of Iselle was located near 21.0, -121.8 with movement WNW at 9 mph. The minimum central pressure was 994 mb with maximum sustained winds of about 60 mph.

25 Aug 2026 - 15:00 UTC ...LARGE ISELLE FORECAST TO SLOWLY WEAKEN DURING THE NEXT FEW DAYS... As of 8:00 AM PDT Tue Aug 25 the center of Iselle was located near 20.9, -121.1 with movement WNW at 10 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

25 Aug 2026 - 9:00 UTC ...ISELLE MOVING NORTHWESTWARD AS A STRONG TROPICAL STORM... As of 2:00 AM PDT Tue Aug 25 the center of Iselle was located near 20.7, -119.9 with movement NW at 15 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

25 Aug 2026 - 3:00 UTC ...ISELLE REMAINS JUST BELOW HURRICANE STRENGTH... As of 8:00 PM PDT Mon Aug 24 the center of Iselle was located near 20.1, -118.6 with movement NW at 15 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

24 Aug 2026 - 21:00 UTC ...ISELLE NEAR HURRICANE STRENGTH... As of 2:00 PM PDT Mon Aug 24 the center of Iselle was located near 19.2, -118.0 with movement NW at 13 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

24 Aug 2026 - 15:00 UTC ...ISELLE CONTINUES TO STRENGTHEN... As of 8:00 AM PDT Mon Aug 24 the center of Iselle was located near 18.5, -117.1 with movement NW at 13 mph. The minimum central pressure was 992 mb with maximum sustained winds of about 65 mph.

24 Aug 2026 - 9:00 UTC No current storm in NHC EP4 as of Mon, 24 Aug 2026 09:48:30 GMT

24 Aug 2026 - 3:00 UTC ...ISELLE CONTINUES TO MOVE NORTHWESTWARD WELL OFFSHORE OF MEXICO... As of 8:00 PM PDT Sun Aug 23 the center of Iselle was located near 17.1, -115.3 with movement NW at 12 mph. The minimum central pressure was 999 mb with maximum sustained winds of about 50 mph.

23 Aug 2026 - 21:00 UTC ...ISELLE STRENGTHENS AS IT MOVES NORTHWESTWARD WELL OFFSHORE OF MEXICO... As of 2:00 PM PDT Sun Aug 23 the center of Iselle was located near 16.9, -115.1 with movement NW at 16 mph. The minimum central pressure was 1001 mb with maximum sustained winds of about 50 mph.

23 Aug 2026 - 15:00 UTC ...TROPICAL STORM ISELLE FORMS WELL OFFSHORE OF MEXICO... As of 8:00 AM MST Sun Aug 23 the center of Iselle was located near 15.3, -114.2 with movement WNW at 12 mph. The minimum central pressure was 1003 mb with maximum sustained winds of about 45 mph.

PTC Iselle
Tropical Pacific
Eastern East Pacific
GOES-West - All States

GeoColor GLM Flash Extent Density Air Mass RGB Day Night Cloud Micro Combo RGB Sandwich RGB Day Convection RGB 2 7 8 13 14

GeoColor

GeoColor is a multispectral product composed of True Color (using a simulated green component) during daytime, and an Infrared product that uses bands 7 and 13 at night. During the day, the imagery looks approximately as it would when viewed with human eyes from space. At night, the blue colors represent liquid water clouds such as fog and stratus, while gray to white indicate higher ice clouds, and the city lights come from a static database derived from the VIIRS Day Night Band.

GeoColor was developed at the Cooperative Institute for Research in the Atmosphere (CIRA) and the STAR Regional and Mesoscale Meteorology Branch (RAMMB). For a full description of the algorithm, please see this article.

Please credit CIRA/NOAA when using GeoColor imagery.

NOTE: Lighted areas shown in nighttime images are not real-time depictions of city lights. The layer is derived from a compilation of JPSS VIIRS Day Night Band images and is included for orientation purposes.

• CIRA GeoColor Product Quick Guide

GeoColor GLM Flash Extent Density Sandwich RGB 2 7 8 13