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Tropical Storm Marco Public Advisory Number 18
2020-08-24 19:56:17| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Mon Aug 24 2020 000 WTNT34 KNHC 241756 TCPAT4 BULLETIN Tropical Storm Marco Special Advisory Number 18 NWS National Hurricane Center Miami FL AL142020 100 PM CDT Mon Aug 24 2020 ...MARCO WEAKENS... ...GUSTY WINDS AND HEAVY RAINFALL STILL POSSIBLE OVER PORTIONS OF THE NORTHERN GULF COAST THROUGH TONIGHT... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...28.7N 88.6W ABOUT 40 MI...65 KM SE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 6 MPH...9 KM/H MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning and Storm Surge Warning for the U.S. Gulf Coast have been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: There are no coastal watches or warnings in effect. Gusty winds, heavy rainfall, and lingering coastal flooding are expected from Marco along portions of the Gulf Coast through this evening. For information on these hazards see products from your local National Weather Service office. Tropical cyclone wind and surge watches or warnings are likely to be issued for portions of the U.S. Gulf Coast later today for Tropical Storm Laura. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 100 PM CDT (1800 UTC), the center of Tropical Storm Marco was located near latitude 28.7 North, longitude 88.6 West. Marco is moving toward the northwest near 6 mph (9 km/h). A turn to the west-northwest is expected to occur by Tuesday, and this motion should continue until the system dissipates in a couple of days. Aircraft and satellite derived wind data indicate that maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Further weakening is expected, and Marco is forecast to become a tropical depression tonight and degenerate to a remnant low on Tuesday. Tropical-storm-force winds extend outward up to 80 miles (130 km) to the northeast of the center over water. A National Ocean Service weather station located on Petit Bois Island, Mississippi recently reported a wind gust to 35 mph (58 km/h). The latest minimum central pressure reported by aircraft reconnaissance is 1008 mb (29.77 inches). HAZARDS AFFECTING LAND ---------------------- WIND: Wind gusts to tropical storm force are possible over the coastal sections of southeastern Louisiana and Mississippi through this evening. RAINFALL: Marco is expected to produce total rainfall accumulations of 2 to 4 inches with isolated maximum amounts of 7 inches across portions of the northeast and north-central Gulf coast through Tuesday. This rainfall may result in areas of flash, urban and small stream flooding along the same area. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast for the next day or so. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A couple of tornadoes are possible today into tonight across the Florida Panhandle, southern Georgia, southern Alabama, and southern Mississippi. NEXT ADVISORY ------------- Next complete advisory at 400 PM CDT. $$ Forecaster Latto
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Tropical Storm Marco Forecast Advisory Number 18
2020-08-24 19:54:46| National Hurricane Center (Atlantic)
Issued at 1800 UTC MON AUG 24 2020 044 WTNT24 KNHC 241754 TCMAT4 TROPICAL STORM MARCO SPECIAL FORECAST/ADVISORY NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 1800 UTC MON AUG 24 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING AND STORM SURGE WARNING FOR THE U.S. GULF COAST HAVE BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT. GUSTY WINDS...HEAVY RAINFALL...AND LINGERING COASTAL FLOODING ARE EXPECTED FROM MARCO ALONG PORTIONS OF THE GULF COAST THROUGH THIS EVENING. FOR INFORMATION ON THESE HAZARDS SEE PRODUCTS FROM YOUR LOCAL NATIONAL WEATHER SERVICE OFFICE. TROPICAL CYCLONE WIND AND SURGE WATCHES OR WARNINGS ARE LIKELY TO BE ISSUED FOR PORTIONS OF THE U.S. GULF COAST LATER TODAY FOR TROPICAL STORM LAURA. TROPICAL STORM CENTER LOCATED NEAR 28.7N 88.6W AT 24/1800Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 5 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1008 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT....... 70NE 0SE 0SW 0NW. 12 FT SEAS.. 60NE 0SE 0SW 0NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 28.7N 88.6W AT 24/1800Z AT 24/1200Z CENTER WAS LOCATED NEAR 28.1N 88.4W FORECAST VALID 25/0000Z 29.4N 89.3W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 25/1200Z 30.0N 91.3W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/0000Z 30.5N 93.6W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/1200Z 30.9N 95.9W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 27/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.7N 88.6W NEXT ADVISORY AT 24/2100Z $$ FORECASTER LATTO
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Tropical Storm Laura Public Advisory Number 19A
2020-08-24 19:44:48| National Hurricane Center (Atlantic)
Issued at 200 PM EDT Mon Aug 24 2020 000 WTNT33 KNHC 241744 TCPAT3 BULLETIN Tropical Storm Laura Intermediate Advisory Number 19A NWS National Hurricane Center Miami FL AL132020 200 PM EDT Mon Aug 24 2020 ...CENTER OF LAURA PASSING NEAR CAYO LARGO CUBA.... ...HEAVY RAINFALL AND FLASH FLOODING CONTINUES OVER THE CAYMAN ISLANDS AND PORTIONS OF CUBA... SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...21.4N 81.6W ABOUT 15 MI...25 KM S OF CAYO LARGO ABOUT 80 MI...125 KM E OF THE ISLE OF YOUTH MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...WNW OR 285 DEGREES AT 20 MPH...31 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Little Cayman and Cayman Brac * Cuban provinces of Camaguey, Las Tunas, Ciego De Avila, Sancti Spiritus, Villa Clara, Cienfuegos, Matanzas, Mayabeque, La Habana, Artemisa, Pinar del Rio, and the Isle of Youth * Florida Keys from Craig Key to Key West * Dry Tortugas The Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 12 hours. Hurricane and Storm Surge Watches will likely be required for portions of the U.S. northwest Gulf coast area by this evening. 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 EDT (1800 UTC), the center of Tropical Storm Laura was located near latitude 21.4 North, longitude 81.6 West. Laura is moving toward the west-northwest near 20 mph (31 km/h), and this general motion with some decrease in forward speed is expected over the next day or so. A turn toward the northwest is forecast by Wednesday, and a northwestward to north-northwestward motion should continue through Wednesday night. On the forecast track, the center of Laura will move over the Caribbean Sea just offshore of the southern coast of Cuba this afternoon, cross western Cuba this evening, and move into the southeastern Gulf of Mexico overnight. Laura is then forecast to move over the central and northwestern Gulf of Mexico Tuesday night and Wednesday, and approach the northwestern coast of the Gulf of Mexico Wednesday night. Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. Little change in strength is forecast today, but strengthening is expected when the storm moves over the Gulf of Mexico. Laura is foreast to become a hurricane on Tuesday, with additional strengthening forecast on Wednesday. Tropical-storm-force winds extend outward up to 175 miles (280 km) primarily to the northeast and east of the center. An elevated observing site at Sand Key located south of Key West, Florida, has recently reported a wind gust of 41 mph (67 km/h). A wind gust of 47 mph (76 km/h) has been observed at Santa Clara, Cuba, within the past few hours. The estimated minimum central pressure based on reconnaissance aircraft data is 1001 mb (29.56 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: Laura is expected to produce the following storm total rainfall accumulations through today: Jamaica, Cuba and the Cayman Islands: 4 to 6 inches, with maximum amounts of 10 inches. Across the Greater Antilles this heavy rainfall could lead to life-threatening flash and urban flooding, and the potential for mudslides. From Wednesday afternoon into Friday, Laura is expected to produce rainfall of 4 to 8 inches, with isolated maximum amounts of 12 inches across portions of the west-central U.S. Gulf Coast near the Texas and Louisiana border north into portions of the lower Mississippi Valley. This rainfall could cause widespread flash and urban flooding, small streams to overflow their banks, and minor to isolated moderate river flooding. WIND: Tropical storm conditions are expected to spread westward within the warning area in Cuba through today. Tropical storm conditions are expected in Little Cayman and Cayman Brac today. Tropical storm conditions are also expected within the warning area in the middle and lower Florida Keys and the Dry Tortugas this afternoon and tonight. SURF: Swells generated by Laura are affecting portions of Hispaniola, Cuba, the central Bahamas, and the Florida Keys. Swells are expected to spread northward along portions of the west coast of Florida peninsula and the coast of the Florida panhandle on Tuesday and Tuesday night. These swells are likely to cause life- threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: An isolated tornado will be possible later today into tonight across the Florida Keys. NEXT ADVISORY ------------- Next complete advisory at 500 PM EDT. $$ Forecaster Brown
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Tropical Storm Marco Public Advisory Number 17
2020-08-24 16:42:50| National Hurricane Center (Atlantic)
Issued at 1000 AM CDT Mon Aug 24 2020 000 WTNT34 KNHC 241442 TCPAT4 BULLETIN Tropical Storm Marco Advisory Number 17 NWS National Hurricane Center Miami FL AL142020 1000 AM CDT Mon Aug 24 2020 ...MARCO CONTINUES TO PRODUCE HEAVY RAINFALL AND GUSTY WINDS ALONG PORTIONS OF THE NORTHERN GULF COAST... SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...28.5N 88.5W ABOUT 55 MI...90 KM SE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...NNW OR 330 DEGREES AT 8 MPH...13 KM/H MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Tropical Storm Warning from west of Morgan City to Intracoastal City, Louisiana, has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for.... * Morgan City Louisiana to Ocean Springs Mississippi * Lake Borgne A Tropical Storm Warning is in effect for... * Morgan City to the Mississippi/Alabama border * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 6 to 18 hours. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 1000 AM CDT (1500 UTC), the center of Tropical Storm Marco was located near latitude 28.5 North, longitude 88.5 West. Marco is moving toward the north-northwest near 8 mph (13 km/h). A turn to the west-northwest is expected to occur by Tuesday, and this motion should continue until the system dissipates in a couple of days. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Steady weakening is forecast, and Marco is expected to weaken to a tropical depression tonight, and degenerate to a remnant low on Tuesday. Tropical-storm-force winds extend outward up to 105 miles (165 km) from the center. The estimated minimum central pressure is 1006 mb (29.71 inches). HAZARDS AFFECTING LAND ---------------------- STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... Morgan City LA to Ocean Springs MS, including Lake Borgne...2-4 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large and dangerous waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Tropical storm conditions are expected to start by this afternoon in portions of the warning area. RAINFALL: Marco is expected to produce total rainfall accumulations of 3 to 6 inches with isolated maximum amounts of 10 inches across portions of the northeast and north-central Gulf coast through Tuesday. This rainfall may result in areas of flash, urban and small stream flooding along the same area. SURF: Swells generated by Marco are likely to affect portions of the northern Gulf Coast for the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A couple of tornadoes are possible today into tonight across the Florida Panhandle, southern Georgia, southern Alabama, and southern Mississippi. NEXT ADVISORY ------------- Next intermediate advisory at 100 PM CDT. Next complete advisory at 400 PM CDT. $$ Forecaster Latto
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Tropical Storm Marco Forecast Advisory Number 17
2020-08-24 16:41:58| National Hurricane Center (Atlantic)
Issued at 1500 UTC MON AUG 24 2020 000 WTNT24 KNHC 241441 TCMAT4 TROPICAL STORM MARCO FORECAST/ADVISORY NUMBER 17 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142020 1500 UTC MON AUG 24 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING FROM WEST OF MORGAN CITY TO INTRACOASTAL CITY...LOUISIANA HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR.... * MORGAN CITY LOUISIANA TO OCEAN SPRINGS MISSISSIPPI * LAKE BORGNE A TROPICAL STORM WARNING IS IN EFFECT FOR... * MORGAN CITY TO THE MISSISSIPPI/ALABAMA BORDER * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...DURING THE NEXT 36 HOURS IN THE INDICATED LOCATIONS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. THIS IS A LIFE-THREATENING SITUATION. PERSONS LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR OTHER DANGEROUS CONDITIONS. PROMPTLY FOLLOW EVACUATION AND OTHER INSTRUCTIONS FROM LOCAL OFFICIALS. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE DURING THIS AFTERNOON AND EVENING. TROPICAL STORM CENTER LOCATED NEAR 28.5N 88.5W AT 24/1500Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 330 DEGREES AT 7 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT. 34 KT....... 90NE 0SE 0SW 0NW. 12 FT SEAS.. 60NE 60SE 60SW 60NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 28.5N 88.5W AT 24/1500Z AT 24/1200Z CENTER WAS LOCATED NEAR 28.1N 88.4W FORECAST VALID 25/0000Z 29.2N 89.3W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 80NE 30SE 0SW 0NW. FORECAST VALID 25/1200Z 30.0N 91.3W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/0000Z 30.5N 93.6W...POST-TROP/REMNT LOW MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 26/1200Z 30.9N 95.9W...POST-TROP/REMNT LOW MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 27/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.5N 88.5W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 24/1800Z NEXT ADVISORY AT 24/2100Z $$ FORECASTER LATTO
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