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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 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 Iselle Public Advisory Number 7

2020-08-28 04:35:52| National Hurricane Center (East Pacific)

Issued at 800 PM PDT Thu Aug 27 2020 000 WTPZ34 KNHC 280235 TCPEP4 BULLETIN Tropical Storm Iselle Advisory Number 7 NWS National Hurricane Center Miami FL EP142020 800 PM PDT Thu Aug 27 2020 ...ISELLE COULD STRENGTHEN A LITTLE OVERNIGHT... ...THEN EXPECTED TO BEGIN GRADUALLY WEAKENING BY LATE FRIDAY... SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...17.6N 115.5W ABOUT 515 MI...830 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NNE OR 30 DEGREES AT 3 MPH...6 KM/H MINIMUM CENTRAL PRESSURE...999 MB...29.50 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 Tropical Storm Iselle was located near latitude 17.6 North, longitude 115.5 West. Iselle is moving toward the north-northeast near 3 mph (6 km/h), and this general motion is expected to continue through Friday night. A northward and then northwestward motion is expected during the weekend. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Some strengthening is possible overnight, but Iselle is expected to begin to gradually weaken late Friday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 999 mb (29.50 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 and are expected to spread northward along the coast of west-central Mexico and the southern Baja California peninsula tonight and continue through Sunday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 200 AM PDT. $$ Forecaster Berg

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Tropical Storm Hernan Public Advisory Number 8

2020-08-28 04:34:27| National Hurricane Center (East Pacific)

Issued at 900 PM MDT Thu Aug 27 2020 000 WTPZ33 KNHC 280234 TCPEP3 BULLETIN Tropical Storm Hernan Advisory Number 8 NWS National Hurricane Center Miami FL EP132020 900 PM MDT Thu Aug 27 2020 ...HERNAN MOVING NORTH-NORTHWESTWARD PARALLEL TO THE COAST OF MEXICO... ...EXPECTED TO WEAKEN DURING THE NEXT TWO DAYS... SUMMARY OF 900 PM MDT...0300 UTC...INFORMATION ---------------------------------------------- LOCATION...20.5N 107.0W ABOUT 85 MI...135 KM W OF CABO CORRIENTES MEXICO ABOUT 250 MI...400 KM SE OF THE SOUTHERN TIP OF BAJA CALIFORNIA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NNW OR 335 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...1004 MB...29.65 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 900 PM MDT (0300 UTC), the center of Tropical Storm Hernan was located near latitude 20.5 North, longitude 107.0 West. Hernan is moving toward the north-northwest near 8 mph (13 km/h). A turn toward the northwest at a faster forward speed is expected on Friday, followed by a turn toward the west-northwest Friday night. On the forecast track, the center of Hernan, along with the strongest winds and heaviest rains, is expected to remain offshore of the southwestern coast of Mexico and the southern Baja California peninsula. Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Weakening is forecast during the next 48 hours, and Hernan is expected to weaken to a tropical depression on Friday and to a remnant low pressure area on Saturday. Tropical-storm-force winds extend outward up to 105 miles (165 km) mainly to the south of the center. The estimated minimum central pressure is 1004 mb (29.65 inches). HAZARDS AFFECTING LAND ---------------------- None. NEXT ADVISORY ------------- Next complete advisory at 300 AM MDT. $$ Forecaster Beven

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Tropical Depression Laura Public Advisory Number 33

2020-08-28 04:34:27| National Hurricane Center (Atlantic)

Issued at 1000 PM CDT Thu Aug 27 2020 000 WTNT33 KNHC 280234 TCPAT3 BULLETIN Tropical Depression Laura Advisory Number 33 NWS National Hurricane Center Miami FL AL132020 1000 PM CDT Thu Aug 27 2020 ...LAURA WEAKENS TO A DEPRESSION OVER ARKANSAS... ...FLOOD THREAT CONTINUES... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...35.1N 92.0W ABOUT 30 MI...50 KM NNE OF LITTLE ROCK ARKANSAS MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. DISCUSSION AND OUTLOOK ---------------------- At 1000 PM CDT (0300 UTC), the center of Tropical Depression Laura was located near latitude 35.1 North, longitude 92.0 West. The depression is moving toward the north-northeast near 15 mph (24 km/h), and this general motion should continue overnight. A northeastward to east-northeastward motion is expected to begin on Friday and continue into Saturday. On the forecast track, the center of Laura is forecast to move over Arkansas tonight, the mid-Mississippi Valley on Friday, the mid-Atlantic states on Saturday, and over the western Atlantic on Sunday. Maximum sustained winds have decreased to near 35 mph (55 km/h) with higher gusts. Laura is expected to become a remnant low pressure system on Saturday, and an extratropical low later this weekend. The estimated minimum central pressure is 993 mb (29.33 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Laura can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC. RAINFALL: Through Friday, Laura is expected to produce the following additional rainfall totals: Over central and northern Arkansas: Additional 3 to 6 inches. Over southern Louisiana and southern Mississippi: 1 to 3 inches, with isolated additional totals of 5 inches. Over northern Mississippi, western Tennessee, and south-central to southeast Missouri: 1 to 3 inches, with isolated totals of 5 inches. This rainfall will continue to cause widespread flash and urban flooding, small streams and creeks to overflow their banks, and minor to moderate freshwater river flooding. Through Saturday, Laura is expected to produce 1 to 3 inches with isolated maximum amounts of 5 inches across portions of the Tennessee and Lower Ohio Valleys, the central and southern Appalachians, and the Mid-Atlantic States. This rainfall may lead to flash and urban flooding and rapid rises on small streams. TORNADOES: A few tornadoes remain possible this evening across eastern Arkansas, western Tennessee, northern Mississippi, and the Missouri Bootheel. The risk for a few tornadoes is expected to redevelop Friday afternoon into the evening across parts of the Mid-South and Tennessee Valley regions. SURF: Swells produced by Laura continue to affect the U.S. Gulf coast from the Florida Panhandle to Texas. 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. Future information on this system can be found in Public Advisories issued by the Weather Prediction Center beginning at 4 AM CDT, under AWIPS header TCPAT3, WMO header WTNT33 KWNH, and on the web at http://www.wpc.ncep.noaa.gov. $$ Forecaster Pasch

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