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Tropical Storm Isaias Graphics
2020-07-30 19:54:32| National Hurricane Center (Atlantic)
5-Day Uncertainty Track last updated Thu, 30 Jul 2020 17:54:32 GMT Wind Speed Probabilities last updated Thu, 30 Jul 2020 15:24:46 GMT
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Summary for Tropical Storm Isaias (AT4/AL092020)
2020-07-30 19:54:28| National Hurricane Center (Atlantic)
...ISAIAS BRINGING HEAVY RAINFALL AND TROPICAL-STORM-FORCE WINDS TO PORTIONS OF THE DOMINICAN REPUBLIC... As of 2:00 PM AST Thu Jul 30 the center of Isaias was located near 18.9, -69.8 with movement NW at 20 mph. The minimum central pressure was 1003 mb with maximum sustained winds of about 60 mph.
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Tropical Storm Isaias Public Advisory Number 9A
2020-07-30 19:54:28| National Hurricane Center (Atlantic)
Issued at 200 PM AST Thu Jul 30 2020 000 WTNT34 KNHC 301754 TCPAT4 BULLETIN Tropical Storm Isaias Intermediate Advisory Number 9A NWS National Hurricane Center Miami FL AL092020 200 PM AST Thu Jul 30 2020 ...ISAIAS BRINGING HEAVY RAINFALL AND TROPICAL-STORM-FORCE WINDS TO PORTIONS OF THE DOMINICAN REPUBLIC... SUMMARY OF 200 PM AST...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...18.9N 69.8W ABOUT 95 MI...150 KM WNW OF PUNTA CANA DOMINICAN REPUBLIC ABOUT 85 MI...140 KM SE OF PUERTO PLATA DOMINICAN REPUBLIC MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NW OR 310 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning for Puerto Rico, Vieques, Culebra, and the U.S. Virgin Islands has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Dominican Republic entire southern and northern coastlines * North coast of Haiti from Le Mole St Nicholas eastward to the northern border with the Dominican Republic * Turks and Caicos Islands * Southeastern Bahamas including the Acklins, Crooked Island, Long Cay, the Inaguas, Mayaguana, and the Ragged Islands * Central Bahamas, including Cat Island, the Exumas, Long Island, Rum Cay, and San Salvador A Tropical Storm Watch is in effect for... * Northwestern Bahamas including Andros Island, New Providence, Eleuthera, Abacos Islands, Berry Islands, Grand Bahamas Island, and Bimini Interests in Cuba and the Florida peninsula should monitor the progress of this system. Watches may be required for a portion of the Florida peninsula later today. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area in the United States, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. For storm information specific to your area outside of the United States, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM AST (1800 UTC), the center of Tropical Storm Isaias was located near latitude 18.9 North, longitude 69.8 West. Isaias is moving toward the northwest near 20 mph (31 km/h), and a west- northwestward to northwestward motion with some decrease in forward speed is expected over the next couple of days. On the forecast track, the center of Isaias will continue to move over Hispaniola through this evening, and be near the Southeastern Bahamas by late tonight or early Friday. Isaias is forecast to be near the Central Bahamas Friday night and move near or over the Northwest Bahamas or South Florida on Saturday. Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. Some slight weakening is possible as Isaias continues to move over Hispaniola today. Re-strengthening is forecast on Friday and Friday night. Tropical-storm-force winds extend outward up to 310 miles (500 km) primarily to the north of the center. A weather station at Punta Cana near the eastern tip of the Dominican Republic reported sustained winds of 39 mph (63 km/h) with a gust to 52 mph (83 km/h) within the past couple of hours. The estimated minimum central pressure is 1003 mb (29.62 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Isaias can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. WIND: Tropical storm conditions will continue to spread across portions of the Dominican Republic and Haiti within the warning area, and are expected to spread over the southeastern Bahamas and Turks and Caicos later today. Tropical storm conditions are expected in the Central Bahamas beginning Friday morning and are possible in the northwestern Bahamas beginning late Friday. RAINFALL: Isaias is expected to produce the following rain accumulations: Puerto Rico, Dominican Republic and northern Haiti: 4 to 8 inches, with isolated maximum totals of 10 inches. Bahamas, Turks and Caicos: 4 to 8 inches. Cuba: 1 to 2 inches, with isolated maximum totals of 4 inches. These rainfall amounts will lead to life-threatening flash flooding and mudslides, as well as river flooding. Urban and small stream flooding is expected for the U.S. Virgin Islands, eastern and southwestern Puerto Rico, and Hispaniola. Heavy rains associated with Isaias may begin to affect South Florida Saturday morning. This rain could result in isolated flash and urban flooding, especially in low-lying and poorly drained areas. SURF: Swells generated by Isaias are affecting portions of the Leeward Islands, the Virgin Islands, Puerto Rico, the Dominican Republic, the Turks and Caicos Islands and the southeastern Bahamas. 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 500 PM AST. $$ Forecaster Brown
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Eastern North Pacific Tropical Weather Outlook
2020-07-30 19:26:22| National Hurricane Center (East Pacific)
000 ABPZ20 KNHC 301726 TWOEP Tropical Weather Outlook NWS National Hurricane Center Miami FL 1100 AM PDT Thu Jul 30 2020 For the eastern North Pacific...east of 140 degrees west longitude: Showers and thunderstorms continue in association with a broad area of low pressure located about a thousand miles southwest of the southern tip of the Baja California peninsula. Some slight additional development is possible as it drifts northwestward during the next day or so. By Saturday, significant development is not likely while the system moves over cooler waters and into less favorable environmental conditions. * Formation chance through 48 hours...low...20 percent. * Formation chance through 5 days...low...20 percent. $$ Forecaster Roberts
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Atlantic Tropical Weather Outlook
2020-07-30 19:25:22| National Hurricane Center (Atlantic)
000 ABNT20 KNHC 301725 TWOAT Tropical Weather Outlook NWS National Hurricane Center Miami FL 200 PM EDT Thu Jul 30 2020 For the North Atlantic...Caribbean Sea and the Gulf of Mexico: The National Hurricane Center is issuing advisories on Tropical Storm Isaias, located over the northeastern Caribbean Sea. Showers and thunderstorms associated with a small area of low pressure, located a few hundred miles south-southeast of the Cabo Verde Islands have increased and become better organized during the day. Environmental conditions appear conducive for further development, and this system could become a tropical depression during the next day or so while it drifts generally north-northwestward. After that time, environmental conditions are forecast to become less favorable for development. * Formation chance through 48 hours...medium...50 percent. * Formation chance through 5 days...medium...50 percent. && Public Advisories on Tropical Storm Isaias are issued under WMO header WTNT34 KNHC and under AWIPS header MIATCPAT4. Forecast/Advisories on Tropical Storm Isaias are issued under WMO header WTNT23 KNHC and under AWIPS header MIATCMAT4. $$ Forecaster Roberts
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