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This is the final warning / advisory for this storm as it has weakened below warning levels and/or the storm system is no longer a tropical cyclone.
Current Wind Speed 30 knots / 35 MPH
Max Predicted Wind Speed 30 knots / 35 MPH at
Spaghetti models for ISELLE can be found here:
ISELLE spaghetti models page »
000 WTPZ34 KNHC 270232 TCPEP4 BULLETIN Post-Tropical Cyclone Iselle Advisory Number 15 NWS National Hurricane Center Miami FL EP092026 800 PM PDT Wed Aug 26 2026 ...ISELLE HAS BECOME A POST-TROPICAL CYCLONE... ...THIS IS THE FINAL NHC ADVISORY ON THE SYSTEM... SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...23.0N 125.9W ABOUT 1015 MI...1635 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...WNW OR 300 DEGREES AT 9 MPH...15 KM/H MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 800 PM PDT (0300 UTC), the center of Post-Tropical Cyclone Iselle was located near latitude 23.0 North, longitude 125.9 West. The post-tropical cyclone is moving toward the west-northwest near 9 mph (15 km/h) and this motion is expected to continue over the next few days. Maximum sustained winds are near 35 mph (55 km/h) with higher gusts. Iselle has become a Post-Tropical Cyclone and is expected to continue to weaken until it dissipates in a couple of days or less. The estimated minimum central pressure is 1002 mb (29.59 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells generated by Iselle will continue to affect the west coast of the Baja California Peninsula for a couple more days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- This is the last public advisory issued by the National Hurricane Center on this system. For additional information on the remnant low please see High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFEPI, WMO header FZPN01 KWBC, and on the web at ocean.weather.gov/shtml/NFDHSFEPI.php $$ Forecaster Katz/Hagen/Papin
Public Advisory not available for this storm.
000 WTPZ44 KNHC 270233 TCDEP4 Post-Tropical Cyclone Iselle Discussion Number 15 NWS National Hurricane Center Miami FL EP092026 800 PM PDT Wed Aug 26 2026 Iselle continues to have no deep convective organization this evening with the low-level center still fully exposed due to dry air and moderate wind shear. With the lack of convection occuring, Iselle is now considered to have become a Post-Tropical Cyclone. The most recent TAFB Dvorak fix has 1.5/25 kt and the objective satellite intensity estimates are in the range of 25-43 kt. Based on that data, the current NHC initial intensity has been set to 30 kt. Iselle should continue to move west-northwestward over the next couple of days, steered by a mid-level ridge to the north of the cyclone. Increasing wind shear, cooler sea surface temperatures, and a drier air mass will continue to weaken the system. The post-tropical remnant low is expected to gradually spin down and open into a trough in about 2 to 3 days. However, it still remains possible that the cyclone could spin down even sooner. Very minor adjustments were made to the previous NHC track and intensity forecasts. For additional information on the remnant low please see High Seas Forecasts issued by the National Weather Service, under AWIPS header NFDHSFEPI, WMO header FZPN01 KWBC, and on the web at ocean.weather.gov/shtml/NFDHSFEPI.php FORECAST POSITIONS AND MAX WINDS INIT 27/0300Z 23.0N 125.9W 30 KT 35 MPH...POST-TROP/REMNT LOW 12H 27/1200Z 23.6N 127.2W 25 KT 30 MPH...POST-TROP/REMNT LOW 24H 28/0000Z 24.3N 128.8W 20 KT 25 MPH...POST-TROP/REMNT LOW 36H 28/1200Z 24.8N 130.2W 20 KT 25 MPH...POST-TROP/REMNT LOW 48H 29/0000Z 25.3N 131.6W 20 KT 25 MPH...POST-TROP/REMNT LOW 60H 29/1200Z...DISSIPATED $$ Forecaster Katz/Hagen/Papin
| Time | Speed | Location | Status |
|---|---|---|---|
| 30 knots | 23.0, -125.9 | POST-TROPICAL CYCLONE | |
| 25 knots | 23.6, -127.2 | POST-TROPICAL CYCLONE | |
| 20 knots | 24.3, -128.8 | POST-TROPICAL CYCLONE | |
| 20 knots | 24.8, -130.2 | POST-TROPICAL CYCLONE | |
| 20 knots | 25.3, -131.6 | POST-TROPICAL CYCLONE | |
| 0 knots | DISSIPATED |
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