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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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Summary for Hurricane Ida (AT4/AL092021)
2021-08-29 21:56:41| National Hurricane Center (Atlantic)
...IDA MOVING NORTHWESTWARD OVER SOUTHEASTERN LOUISIANA... ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING CONTINUES IN PORTIONS OF SOUTHEASTERN LOUISIANA... As of 4:00 PM CDT Sun Aug 29 the center of Ida was located near 29.5, -90.6 with movement NW at 10 mph. The minimum central pressure was 938 mb with maximum sustained winds of about 130 mph.
Summary for Hurricane Ida (AT4/AL092021)
2021-08-29 20:55:38| National Hurricane Center (Atlantic)
...EXTREMELY DANGEROUS CATEGORY 4 HURRICANE IDA MAKES SECOND LANDFALL SOUTHWEST OF GALLIANO LOUISIANA... ...HURRICANE CONDITIONS SPREADING INLAND ACROSS SOUTHEAST LOUISIANA... As of 2:00 PM CDT Sun Aug 29 the center of Ida was located near 29.3, -90.4 with movement NW at 12 mph. The minimum central pressure was 934 mb with maximum sustained winds of about 145 mph.
Hurricane Ida Update Statement
2021-08-29 20:55:38| National Hurricane Center (Atlantic)
Issued at 200 PM CDT Sun Aug 29 2021 000 WTNT64 KNHC 291855 TCUAT4 Hurricane Ida Tropical Cyclone Update NWS National Hurricane Center Miami FL AL092021 200 PM CDT Sun Aug 29 2021 ...EXTREMELY DANGEROUS CATEGORY 4 HURRICANE IDA MAKES SECOND LANDFALL SOUTHWEST OF GALLIANO LOUISIANA... ...HURRICANE CONDITIONS SPREADING INLAND ACROSS SOUTHEAST LOUISIANA... NOAA Doppler radar imagery indicates that the eye of Ida made a second landfall along the southeastern coast of Louisiana just southwest of Galliano around 200 PM CDT (1900 UTC). Maximum sustained winds are estimated to be 145 mph (235 km/h). The estimated central pressure is 934 mb (27.58 in). Within the past hour, a research wind gauge near Golden Meadow, Louisiana, reported sustained winds of 70 mph (113 km/h) and a gust to 107 mph (172 km/h) and a Weatherflow site in Dulac reported sustained winds of 76 mph (122 km/h) and a gust to 104 mph (167 km/h). The New Orleans Lakefront airport reported a peak wind gust of 76 mph (122 km/h) within the last hour. A NOAA National Ocean Service tide gauge in Shell Beach, Louisiana, recently reported a water level of 6.8 feet above mean higher high water, which is an approximation of inundation in that area. A NOAA National Ocean Service tide gauge at Bay Waveland Yacht Club, Mississippi, recently reported a water level of 5.6 feet above mean higher high water, which is an approximation of inundation in that area. SUMMARY OF 200 PM CDT...1900 UTC...INFORMATION ----------------------------------------------- LOCATION...29.3N 90.4W ABOUT 25 MI...40 KM WNW OF GRAND ISLE LOUISIANA ABOUT 25 MI...40 KM SE OF HOUMA LOUISIANA MAXIMUM SUSTAINED WINDS...145 MPH...235 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...934 MB...27.58 INCHES $$ Forecaster D. Zelinsky/Brown
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Hurricane Ida Public Advisory Number 14A
2021-08-29 19:52:36| National Hurricane Center (Atlantic)
Issued at 100 PM CDT Sun Aug 29 2021 000 WTNT34 KNHC 291752 TCPAT4 BULLETIN Hurricane Ida Intermediate Advisory Number 14A NWS National Hurricane Center Miami FL AL092021 100 PM CDT Sun Aug 29 2021 ...EYE OF EXTREMELY DANGEROUS CATEGORY 4 HURRICANE IDA MOVING OVER SOUTHEASTERN LOUISIANA... ...CATASTROPHIC STORM SURGE, EXTREME WINDS, AND FLASH FLOODING IN PORTIONS OF LOUISIANA... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...29.2N 90.3W ABOUT 20 MI...30 KM W OF GRAND ISLE LOUISIANA ABOUT 55 MI...90 KM SSW OF NEW ORLEANS LOUISIANA MAXIMUM SUSTAINED WINDS...150 MPH...240 KM/H PRESENT MOVEMENT...NW OR 320 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...930 MB...27.46 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Intracoastal City Louisiana to the Alabama/Florida border * Vermilion Bay, Lake Borgne, Lake Pontchartrain, Lake Maurepas, and Mobile Bay A Hurricane Warning is in effect for... * Intracoastal 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... * Cameron Louisiana to west of Intracoastal 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 100 PM CDT (1800 UTC), the eye of Hurricane Ida was located by NWS Doppler radar near latitude 29.2 North, longitude 90.3 West. Ida is moving toward the northwest near 13 mph (20 km/h), and a slightly slower northwestward motion should continue through this evening. A turn toward the north should occur by Monday morning, 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 this afternoon and tonight. Ida is then forecast to move well inland over portions of Louisiana and western Mississippi Monday and Monday night, and move across the Tennessee Valley on Tuesday. Maximum sustained winds are near 150 mph (240 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. Hurricane-force winds extend outward up to 50 miles (85 km) from the center and tropical-storm-force winds extend outward up to 150 miles (240 km). A Florida Coastal Monitoring Observation Tower at South Lafourche Airport recently reported a sustained wind of 70 mph (113 km/h) and a wind gust of 102 mph (164 km/h). A sustained wind of 47 mph (60 km/h) and a gust of 63 mph (102 km/h) were recently reported at Lakefront Airport in New Orleans. A NOAA National Ocean Service tide gauge in Shell Beach, Louisiana, recently reported a water level of 6.8 feet above mean higher high water, which is an approximation of inundation in that area. The estimated minimum central pressure is 930 mb (27.46 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 Burns Point, LA to Morgan City, LA...5-8 ft Lake Pontchartrain...5-8 ft Ocean Springs, MS to MS/AL border...4-7 ft Lake Maurepas...4-6 ft East of Intracoastal City, LA to Burns Point, LA including Vermilion Bay...3-5 ft MS/AL border to AL/FL border including Mobile Bay...3-5 ft Rockefeller Wildlife Refuge, LA to Intracoastal City, LA...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 afternoon. Hurricane conditions will spread farther inland within the Hurricane Warning area over southeastern Louisiana through 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 this morning, spreading northeast into the Lower Mississippi Valley later today 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 riverine flooding impacts. Ida is forecast to turn to the northeast early 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 and riverine flooding. 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 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 400 PM CDT. $$ Forecaster Brown/Brennan
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