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Summary for Tropical Storm Iselle (EP4/EP142020)
2020-08-28 10:31:32| National Hurricane Center (East Pacific)
...ISELLE A LITTLE STRONGER... ...BUT EXPECTED TO BEGIN WEAKENING TONIGHT... As of 2:00 AM PDT Fri Aug 28 the center of Iselle was located near 17.9, -115.0 with movement NE at 5 mph. The minimum central pressure was 997 mb with maximum sustained winds of about 60 mph.
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Tropical Storm Iselle Public Advisory Number 8
2020-08-28 10:31:32| National Hurricane Center (East Pacific)
Issued at 200 AM PDT Fri Aug 28 2020 000 WTPZ34 KNHC 280831 TCPEP4 BULLETIN Tropical Storm Iselle Advisory Number 8 NWS National Hurricane Center Miami FL EP142020 200 AM PDT Fri Aug 28 2020 ...ISELLE A LITTLE STRONGER... ...BUT EXPECTED TO BEGIN WEAKENING TONIGHT... SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...17.9N 115.0W ABOUT 480 MI...770 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NE OR 45 DEGREES AT 5 MPH...7 KM/H MINIMUM CENTRAL PRESSURE...997 MB...29.44 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 200 AM PDT (0900 UTC), the center of Tropical Storm Iselle was located near latitude 17.9 North, longitude 115.0 West. Iselle is moving toward the northeast near 5 mph (7 km/h) and this general motion is expected to continue through tonight. A northward and then northwestward motion is expected during the weekend. Maximum sustained winds have increased to near 60 mph (95 km/h) with higher gusts. Little change in strength is expected today, but a gradual weakening trend should begin tonight. Tropical-storm-force winds extend outward up to 45 miles (75 km) from the center. The estimated minimum central pressure is 997 mb (29.44 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells generated by Iselle and a large area of southwesterly winds to its south are affecting portions of the southwestern coast of Mexico. These swells are expected to spread northward along the coast of west-central Mexico and the southern Baja California peninsula through Sunday, and will likely cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 800 AM PDT. $$ Forecaster Cangialosi
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Tropical Storm Hernan Graphics
2020-08-28 10:10:45| National Hurricane Center (East Pacific)
5-Day Uncertainty Track last updated Fri, 28 Aug 2020 08:10:45 GMT Wind Speed Probabilities last updated Fri, 28 Aug 2020 08:10:45 GMT
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Tropical Storm Hernan Public Advisory Number 9
2020-08-28 10:09:29| National Hurricane Center (East Pacific)
Issued at 300 AM MDT Fri Aug 28 2020 000 WTPZ33 KNHC 280809 TCPEP3 BULLETIN Tropical Storm Hernan Advisory Number 9 NWS National Hurricane Center Miami FL EP132020 300 AM MDT Fri Aug 28 2020 ...HERNAN LOCATED NORTHEAST OF PREVIOUS ESTIMATES... ...COULD ENTER THE GULF OF CALIFORNIA LATER THIS MORNING... SUMMARY OF 300 AM MDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...22.7N 107.3W ABOUT 165 MI...265 KM E OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 14 MPH...22 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests along the southeastern coast of the Baja California peninsula should monitor the progress of Hernan. DISCUSSION AND OUTLOOK ---------------------- At 300 AM MDT (0900 UTC), the center of Tropical Storm Hernan was located near latitude 22.7 North, longitude 107.3 West. Hernan is moving toward the northwest near 14 mph (22 km/h). A slow turn toward the west with a decrease in forward speed is expected during the next day or so. Hernan is forecast to move over the southern Gulf of California later today and could approach the southeast coast of the Baja California peninsula by late Friday. Recent satellite-derived wind data indicate that the maximum sustained winds remain near 40 mph (65 km/h) with higher gusts. Weakening is expected during the next day or so and Hernan is forecast to dissipate on Saturday, if not sooner. Tropical-storm-force winds extend outward up to 45 miles (75 km) from the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 900 AM MDT. $$ Forecaster Zelinsky
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Tropical Storm Hernan Forecast Discussion Number 9
2020-08-28 10:09:25| National Hurricane Center (East Pacific)
Issued at 300 AM MDT Fri Aug 28 2020 000 WTPZ43 KNHC 280809 TCDEP3 Tropical Storm Hernan Discussion Number 9 NWS National Hurricane Center Miami FL EP132020 300 AM MDT Fri Aug 28 2020 Shortly after the release of the previous advisory, microwave imagery from a WindSat overpass showed no indication of a well-defined center near Hernan's estimated location. However,there was a hint of a small vortex well to the northeast. Subsequent ASCAT data showed that the well-defined vortex had moved near the Islas Marias and had winds of 30-35 kt. Data from the Geostationary Lightning Mapper showed a continuous maximum in lightning near Hernan's center from yesterday afternoon through the new estimated position. Confidence is therefore fairly high that Hernan has persisted as a tropical cyclone, at least through 0400 UTC this morning. Due to the northeastward relocation of the center, the track forecast has been significantly changed in that direction and now shows Hernan entering the Gulf of California later today. Hernan appears to be quickly moving around a larger low-level cyclonic gyre centered just west of the coast of Mexico. The gyre could steer Hernan or its remnants over the Baja California peninsula later today or early Saturday, but it is not forecast to have sustained tropical-storm-force winds at that time. All of the global models show Hernan opening into a trough within about 24 hours, but it could happen much sooner than that- possibly before Hernan even reaches the Gulf of California. If Hernan does make it to the coast as a depression or remnant low, it could produce some gusty winds before it quickly weakens and dissipates. FORECAST POSITIONS AND MAX WINDS INIT 28/0900Z 22.7N 107.3W 35 KT 40 MPH 12H 28/1800Z 23.6N 108.9W 35 KT 40 MPH 24H 29/0600Z 24.2N 110.6W 30 KT 35 MPH...POST-TROPICAL 36H 29/1800Z...DISSIPATED $$ Forecaster Zelinsky
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