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Hurricane Ida Public Advisory Number 15A
2021-08-30 01:54:16| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Sun Aug 29 2021 000 WTNT34 KNHC 292354 TCPAT4 BULLETIN Hurricane Ida Intermediate Advisory Number 15A NWS National Hurricane Center Miami FL AL092021 700 PM CDT Sun Aug 29 2021 ...IDA MOVING FURTHER INLAND OVER SOUTHEASTERN LOUISIANA... ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING CONTINUE IN PORTIONS OF SOUTHEASTERN LOUISIANA... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...29.9N 90.5W ABOUT 25 MI...40 KM WSW OF NEW ORLEANS LOUISIANA ABOUT 55 MI...85 KM SE OF BATON ROUGE LOUISIANA MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...944 MB...27.88 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Morgan City Louisiana to the Alabama/Florida border * Lake Borgne, Lake Pontchartrain, Lake Maurepas, and Mobile Bay A Hurricane Warning is in effect for... * Morgan City Louisiana to the Mouth of the Pearl River * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Intracoastal City Louisiana to west of Morgan City Louisiana * Mouth of the Pearl River to the Alabama/Florida border A Storm Surge Warning means there is a danger of life-threatening inundation from rising water moving inland from the coastline 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 Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. 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 700 PM CDT (0000 UTC), the eye of Hurricane Ida was located near latitude 29.9 North, longitude 90.5 West. Ida is moving toward the northwest near 10 mph (17 km/h). A turn toward the north is expected overnight, followed by a slightly faster northeastward motion by Monday night and Tuesday. On the forecast track, the center of Ida will move farther inland over southeastern Louisiana tonight. Ida is then forecast to move well inland over portions of western Mississippi Monday and Monday night, and move across the Tennessee Valley on Tuesday. Doppler radar data indicate that the maximum sustained winds are near 120 mph (195 km/h) with higher gusts. Ida is a dangerous category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Rapid weakening is expected during the next day or so, however, Ida is forecast to remain a hurricane through late tonight and remain a tropical storm until Monday afternoon. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). A sustained wind of 62 mph (100 km/h) with a gust of 83 mph (133 km/h) was recently observed at New Orleans International Airport. A sustained wind of 62 mph (100 km/h) and a gust of 85 mph (137 km/h) was recently reported at Frenier Landing, Louisiana. The estimated minimum central pressure is 944 mb (27.88 inches). A Florida Coastal Monitoring Program observing station located northeast of Raceland, Louisiana, recently reported a minimum pressure of 945 mb (27.91). HAZARDS AFFECTING LAND ---------------------- Key messages for Ida can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at hurricanes.gov/graphics_at4.shtml?key_messages. 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 Bay St. Louis, MS including Lake Borgne...7-11 ft Lake Pontchartrain...5-8 ft Bay St. Louis, MS to Ocean Springs, MS...4-7 ft Lake Maurepas...4-6 ft Ocean Springs to AL/FL border including Mobile Bay...3-5 ft Intracoastal City, LA to Morgan City, LA including Vermilion Bay...1-3 ft AL/FL border to Okaloosa/Walton County Line including Pensacola Bay...1-3 ft Overtopping of local levees outside of the Hurricane and Storm Damage Risk Reduction System is possible where local inundation values may be higher than those shown above. The deepest water will occur along the immediate coast near and to the east of the landfall location, 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: Catastrophic wind damage is likely near the core of Ida as it moves farther inland over southeastern Louisiana through this evening. Hurricane conditions will spread farther inland within the Hurricane Warning area over southeastern Louisiana tonight. Tropical storm conditions will also spread inland over portions of Louisiana and Mississippi tonight and Monday. RAINFALL: Heavy rainfall from Ida will continue to impact the southeast Louisiana coast, spreading northeast into the Lower Mississippi Valley this evening into Monday. Total rainfall accumulations of 10 to 18 inches with isolated maximum amounts of 24 inches are possible across southeast Louisiana into far southern Mississippi through Monday. This is likely to result in life- threatening flash and urban flooding and significant river flooding impacts. Ida is forecast to turn to the northeast on Monday and track across the Middle Tennessee Valley and Upper Ohio Valley through Wednesday, producing the following rainfall totals: Coastal Alabama to the far western Florida panhandle: 5 to 10 inches with isolated maximum amounts of 15 inches, today through Tuesday morning. Central Mississippi: 4 to 8 inches with isolated maximum amounts of 12 inches, tonight through Monday night. Middle Tennessee Valley, Upper Ohio Valley, Central Appalachians into the Mid-Atlantic: 3 to 6 inches with isolated higher amounts, Tuesday into Wednesday. These rainfall totals will result in considerable flash flooding along with widespread minor to isolated major riverine flooding from the Lower Mississippi Valley into far western Alabama. TORNADOES: Tornadoes will be most likely through Monday over southeast Louisiana, southern Mississippi, southwest Alabama, and the western Florida Panhandle. A few tornadoes are also possible farther north across much of Mississippi and Alabama on Monday. SURF: Swells will continue to affect the northern Gulf coast through early Monday. 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 1000 PM CDT. $$ Forecaster Cangialosi
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Tropical Storm Nora Public Advisory Number 17A
2021-08-30 01:46:15| National Hurricane Center (East Pacific)
Issued at 600 PM MDT Sun Aug 29 2021 000 WTPZ34 KNHC 292346 TCPEP4 BULLETIN Tropical Storm Nora Intermediate Advisory Number 17A NWS National Hurricane Center Miami FL EP142021 600 PM MDT Sun Aug 29 2021 ...HEAVY RAINS WITH THE RISK OF FLOODING CONTINUES NEAR NORA ALONG PORTIONS OF THE NORTHWEST COAST OF MEXICO... SUMMARY OF 600 PM MDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...24.5N 107.7W ABOUT 120 MI...195 KM NW OF MAZATLAN MEXICO ABOUT 180 MI...290 KM NE OF CABO SAN LUCAS MEXICO MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NNW OR 330 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Mazatlan to Topolobampo Mexico A Tropical Storm Watch is in effect for... * North of Topolobampo to Huatabampito Mexico A Tropical Storm Warning means that tropical storm conditions are expected or occurring somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within the next 12 to 24 hours. Interests elsewhere along the coast of Sonora should monitor the progress of Nora. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 600 PM MDT (0000 UTC), the center of Tropical Storm Nora was located along the coast of Mexico, near latitude 24.5 North, longitude 107.7 West. Nora is moving toward the north-northwest near 12 mph (19 km/h). A northwestward motion at a slightly slower forward speed is expected to begin tonight and continue through early this week. Maximum sustained winds are near 60 mph (95 km/h) with higher gusts. At least gradual weakening is forecast during the next couple of days as the center moves roughly parallel to the coast of Mexico. However, rapid weakening will likely occur if the center moves inland sooner than forecast. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 992 mb (29.30 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Nora can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP4, WMO header WTPZ44 KNHC, and on the web at hurricanes.gov/graphics_ep4.shtml?key_messages. WIND: Tropical storm conditions are ongoing in portions of the Tropical Storm Warning area in mainland Mexico. Tropical storm conditions are possible within the Tropical Storm Watch area on Monday. RAINFALL: Heavy rainfall is likely along the west coast of Mexico from Jalisco to Sonora through late week as Nora lifts northward through the Gulf of California. Rainfall of 8 to 12 inches with maximum amounts of 20 inches is possible. This rainfall will produce life-threatening flash flooding and mudslides. Rainfall of 2 to 4 inches with maximum amounts of 6 inches is possible in Baja California Sur. Toward the middle and latter part of the week, moisture associated with Nora is likely to bring heavy rainfall and the potential for scattered flash flooding to portions of the southwestern U.S. and central Rockies. STORM SURGE: A storm surge is expected to produce coastal flooding in areas of onshore winds within the tropical storm warning area. Near the coast, the surge will be accompanied by large waves. SURF: Swells generated by Nora are affecting the southwestern coast of Mexico and will spread northward into the Gulf of California through Monday. 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 900 PM MDT. $$ Forecaster D. Zelinsky
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Hurricane Ida Public Advisory Number 15
2021-08-29 22:51:39| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Sun Aug 29 2021 622 WTNT34 KNHC 292051 TCPAT4 BULLETIN Hurricane Ida Advisory Number 15 NWS National Hurricane Center Miami FL AL092021 400 PM CDT Sun Aug 29 2021 ...IDA MOVING NORTHWESTWARD OVER SOUTHEASTERN LOUISIANA... ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING CONTINUES IN PORTIONS OF SOUTHEASTERN LOUISIANA... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...29.5N 90.6W ABOUT 45 MI...75 KM SW OF NEW ORLEANS LOUISIANA ABOUT 70 MI...115 KM SSE OF BATON ROUGE LOUISIANA MAXIMUM SUSTAINED WINDS...130 MPH...215 KM/H PRESENT MOVEMENT...NW OR 325 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...938 MB...27.70 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Hurricane Warning along the coast of Louisiana from Morgan City to Intracoastal City has been changed to a Tropical Storm Warning. The Tropical Storm Warning from Cameron to Intracoastal City Louisiana has been discontinued. The Storm Surge Warning west of Morgan City has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Morgan City Louisiana to the Alabama/Florida border * Lake Borgne, Lake Pontchartrain, Lake Maurepas, and Mobile Bay A Hurricane Warning is in effect for... * Morgan City Louisiana to the Mouth of the Pearl River * Lake Pontchartrain, Lake Maurepas, and Metropolitan New Orleans A Tropical Storm Warning is in effect for... * Intracoastal City Louisiana to west of Morgan City Louisiana * Mouth of the Pearl River to the Alabama/Florida border A Storm Surge Warning means there is a danger of life-threatening inundation from rising water moving inland from the coastline 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 Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area. 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 400 PM CDT (2100 UTC), the eye of Hurricane Ida was located near latitude 29.5 North, longitude 90.6 West. Ida is moving toward the northwest near 10 mph (17 km/h). A turn toward the north is expected overnight, followed by a slightly faster northeastward motion by Monday night and Tuesday. On the forecast track, the center of Ida will move farther inland over southeastern Louisiana tonight. Ida is then forecast to move well inland over portions of western Mississippi Monday and Monday night, and move across the Tennessee Valley on Tuesday. Doppler radar data indicate that the maximum sustained winds are near 130 mph (215 km/h) with higher gusts. Ida is an extremely dangerous category 4 hurricane on the Saffir-Simpson Hurricane Wind Scale. Rapid weakening is expected during the next day or so, however Ida is forecast to remain a hurricane through late tonight and remain a tropical storm until Monday afternoon. Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). A Weatherflow station near Dulac just reported sustained winds of 93 mph (150 km/h) and a gust to 135 mph (217 km/h). A Florida Coastal Monitoring Program observing station at the South Lafourche airport recently reported a sustained wind of 91 mph (146 km/h) and wind gust of 122 mph (196 km/h). A sustained wind of 51 mph (81 km/h) and a gust to 82 mph (131 km/h) was recently reported at Lakefront Airport in New Orleans. The estimated minimum central pressure is 938 mb (27.70 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Ida can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at hurricanes.gov/graphics_at4.shtml?key_messages. 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... Port Fourchon, LA to Mouth of the Mississippi River...12-16 ft Morgan City, LA to Port Fourchon, LA...8-12 ft Mouth of the Mississippi River to Bay St. Louis, MS including Lake Borgne...8-12 ft Bay St. Louis, MS to Ocean Springs, MS...5-8 ft Lake Pontchartrain...5-8 ft Ocean Springs, MS to MS/AL border...4-7 ft Lake Maurepas...4-6 ft MS/AL border to AL/FL border including Mobile Bay...3-5 ft Intracoastal City, LA to Morgan City, LA including Vermilion Bay...1-3 ft AL/FL border to Okaloosa/Walton County Line including Pensacola Bay...1-3 ft Overtopping of local levees outside of the Hurricane and Storm Damage Risk Reduction System is possible where local inundation values may be higher than those shown above. The deepest water will occur along the immediate coast near and to the east of the landfall location, 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: Catastrophic wind damage is likely near the core of Ida as it moves inland over southeastern Louisiana through this evening. Hurricane conditions will spread farther inland within the Hurricane Warning area over southeastern Louisiana tonight. Tropical storm conditions will also spread inland over portions of Louisiana and Mississippi tonight and Monday. RAINFALL: Heavy rainfall from Ida will continue to impact the southeast Louisiana coast, spreading northeast into the Lower Mississippi Valley this evening into Monday. Total rainfall accumulations of 10 to 18 inches with isolated maximum amounts of 24 inches are possible across southeast Louisiana into far southern Mississippi through Monday. This is likely to result in life- threatening flash and urban flooding and significant river flooding impacts. Ida is forecast to turn to the northeast on Monday and track across the Middle Tennessee Valley and Upper Ohio Valley through Wednesday, producing the following rainfall totals: Coastal Alabama to the far western Florida panhandle: 5 to 10 inches with isolated maximum amounts of 15 inches, today through Tuesday morning. Central Mississippi: 4 to 8 inches with isolated maximum amounts of 12 inches, tonight through Monday night. Middle Tennessee Valley, Upper Ohio Valley, Central Appalachians into the Mid-Atlantic: 3 to 6 inches with isolated higher amounts, Tuesday into Wednesday. These rainfall totals will result in considerable flash flooding along with widespread minor to isolated major riverine flooding from the Lower Mississippi Valley into far western Alabama. TORNADOES: Tornadoes will be most likely through Monday over southeast Louisiana, southern Mississippi, southwest Alabama, and the western Florida Panhandle. A few tornadoes are also possible farther north across much of Mississippi and Alabama on Monday. SURF: Swells will continue to affect the northern Gulf coast through early Monday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 700 PM CDT. Next complete advisory at 1000 PM CDT. $$ Forecaster Brown
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Hurricane Ida Forecast Advisory Number 15
2021-08-29 22:51:11| National Hurricane Center (Atlantic)
Issued at 2100 UTC SUN AUG 29 2021 982 WTNT24 KNHC 292051 TCMAT4 HURRICANE IDA FORECAST/ADVISORY NUMBER 15 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092021 2100 UTC SUN AUG 29 2021 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE HURRICANE WARNING ALONG THE COAST OF LOUISIANA FROM MORGAN CITY TO INTRACOASTAL CITY HAS BEEN CHANGED TO A TROPICAL STORM WARNING. THE TROPICAL STORM WARNING FROM CAMERON TO INTRACOASTAL CITY LOUISIANA HAS BEEN DISCONTINUED. THE STORM SURGE WARNING WEST OF MORGAN CITY HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * MORGAN CITY LOUISIANA TO THE ALABAMA/FLORIDA BORDER * LAKE BORGNE...LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND MOBILE BAY A HURRICANE WARNING IS IN EFFECT FOR... * MORGAN CITY LOUISIANA TO THE MOUTH OF THE PEARL RIVER * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS A TROPICAL STORM WARNING IS IN EFFECT FOR... * INTRACOASTAL CITY LOUISIANA TO WEST OF MORGAN CITY LOUISIANA * MOUTH OF THE PEARL RIVER TO THE ALABAMA/FLORIDA BORDER A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING INUNDATION FROM RISING WATER MOVING INLAND FROM THE COASTLINE 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 HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. HURRICANE CENTER LOCATED NEAR 29.5N 90.6W AT 29/2100Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 938 MB EYE DIAMETER 15 NM MAX SUSTAINED WINDS 115 KT WITH GUSTS TO 140 KT. 64 KT....... 40NE 35SE 20SW 25NW. 50 KT....... 70NE 60SE 40SW 40NW. 34 KT.......130NE 120SE 80SW 80NW. 12 FT SEAS..180NE 180SE 150SW 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 29.5N 90.6W AT 29/2100Z AT 29/1800Z CENTER WAS LOCATED NEAR 29.2N 90.3W FORECAST VALID 30/0600Z 30.7N 90.9W...INLAND MAX WIND 65 KT...GUSTS 90 KT. 64 KT... 25NE 25SE 10SW 15NW. 50 KT... 50NE 50SE 25SW 30NW. 34 KT... 80NE 100SE 70SW 60NW. FORECAST VALID 30/1800Z 32.4N 90.7W...INLAND MAX WIND 35 KT...GUSTS 50 KT. 34 KT... 60NE 60SE 30SW 30NW. FORECAST VALID 31/0600Z 34.0N 89.4W...INLAND MAX WIND 25 KT...GUSTS 40 KT. FORECAST VALID 31/1800Z 35.6N 87.2W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 01/0600Z 37.1N 84.2W...POST-TROP/INLAND MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 01/1800Z 38.6N 80.5W...POST-TROP/EXTRATROP MAX WIND 20 KT...GUSTS 30 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 02/1800Z 41.3N 72.5W...POST-TROP/EXTRATROP MAX WIND 30 KT...GUSTS 40 KT. OUTLOOK VALID 03/1800Z 43.8N 67.0W...POST-TROP/EXTRATROP MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 29.5N 90.6W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 30/0000Z NEXT ADVISORY AT 30/0300Z $$ FORECASTER BROWN
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Tropical Storm Nora Public Advisory Number 17
2021-08-29 22:51:11| National Hurricane Center (East Pacific)
Issued at 300 PM MDT Sun Aug 29 2021 983 WTPZ34 KNHC 292051 TCPEP4 BULLETIN Tropical Storm Nora Advisory Number 17 NWS National Hurricane Center Miami FL EP142021 300 PM MDT Sun Aug 29 2021 ...NORA TO CONTINUE PRODUCING HEAVY RAINS AND FLOODING ACROSS PORTIONS OF WEST-CENTRAL AND NORTHWESTERN MEXICO... SUMMARY OF 300 PM MDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...24.3N 107.5W ABOUT 105 MI...165 KM NW OF MAZATLAN MEXICO ABOUT 180 MI...290 KM ENE OF CABO SAN LUCAS MEXICO MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NNW OR 330 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The government of Mexico has issued a Tropical Storm Watch north of Topolobampo to Huatabampito. The Tropical Storm Warning south of Mazatlan to Escuinapa has been discontinued, and the Tropical Storm Watch from Cabo San Lucas to La Paz has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Mazatlan to Topolobampo Mexico A Tropical Storm Watch is in effect for... * North of Topolobampo to Huatabampito Mexico A Tropical Storm Warning means that tropical storm conditions are expected or occurring somewhere within the warning area. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, in this case within the next 12 to 24 hours. Interests elsewhere along the coast of Sonora should monitor the progress of Nora. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 300 PM MDT (2100 UTC), the center of Tropical Storm Nora was located near latitude 24.3 North, longitude 107.5 West. Nora is moving toward the north-northwest near 12 mph (19 km/h). A northwestward motion at a slightly slower forward speed is expected to begin tonight and continue through early this week. Maximum sustained winds have decreased to near 60 mph (95 km/h) with higher gusts. Gradual weakening is forecast during the couple of days as the center moves roughly parallel to the coast of Mexico. However, rapid weakening will likely occur if the center moves inland sooner than forecast. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 992 mb (29.30 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Nora can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDEP4, WMO header WTPZ44 KNHC, and on the web at hurricanes.gov/graphics_ep4.shtml?key_messages. WIND: Tropical storm conditions are ongoing in portions of the Tropical Storm Warning area in mainland Mexico. Tropical storm conditions are possible within the Tropical Storm Watch area on Monday. RAINFALL: Heavy rainfall is likely along the west coast of Mexico from Jalisco to Sonora through late week as Nora lifts northward through the Gulf of California. Rainfall of 8 to 12 inches with maximum amounts of 20 inches is possible. This rainfall will produce life-threatening flash flooding and mudslides. Rainfall of 2 to 4 inches with maximum amounts of 6 inches is possible in Baja California Sur. Toward the middle and latter part of the week, moisture associated with Nora is likely to bring heavy rainfall and the potential for scattered flash flooding to portions of the southwestern U.S. and central Rockies. STORM SURGE: A storm surge is expected to produce coastal flooding in areas of onshore winds within the tropical storm warning area. Near the coast, the surge will be accompanied by large waves. SURF: Swells generated by Nora are affecting the southwestern coast of Mexico and will spread northward into the Gulf of California through Monday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 600 PM MDT. Next complete advisory at 900 PM MDT. $$ Forecaster Reinhart
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