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Tropical Storm Nicholas Potential Storm Surge Flooding Map

2021-09-14 06:35:54| National Hurricane Center (Atlantic)

Potential Storm Surge Flooding Map last updated Tue, 14 Sep 2021 04:35:54 GMT

Summary for Hurricane Nicholas (AT4/AL142021)

2021-09-14 05:25:18| National Hurricane Center (Atlantic)

...NICHOLAS BECOMES A HURRICANE... ...BRINGING HEAVY RAINS, STRONG WINDS, AND STORM SURGES TO PORTIONS OF THE CENTRAL AND UPPER TEXAS COASTS... As of 10:00 PM CDT Mon Sep 13 the center of Nicholas was located near 28.4, -95.8 with movement NNE at 10 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 75 mph.

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Hurricane Nicholas Public Advisory Number 8

2021-09-14 05:25:18| National Hurricane Center (Atlantic)

Issued at 1000 PM CDT Mon Sep 13 2021 000 WTNT34 KNHC 140324 CCA TCPAT4 BULLETIN Hurricane Nicholas Advisory Number 8...Corrected NWS National Hurricane Center Miami FL AL142021 1000 PM CDT Mon Sep 13 2021 Corrected for Tropical Storm Warning Summary ...NICHOLAS BECOMES A HURRICANE... ...BRINGING HEAVY RAINS, STRONG WINDS, AND STORM SURGES TO PORTIONS OF THE CENTRAL AND UPPER TEXAS COASTS... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...28.4N 95.8W ABOUT 20 MI...30 KM SE OF MATAGORDA TEXAS ABOUT 45 MI...75 KM SW OF FREEPORT TEXAS MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNE OR 25 DEGREES AT 10 MPH...17 KM/H MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Hurricane Watch south of Port O'Connor Texas, is discontinued, and the Tropical Storm Warning south of Port Aransas, Texas, is discontinued. The Hurricane Watch from Port O'Connor north to Freeport, Texas has been upgraded to a Hurricane Warning. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Port Aransas Texas to Sabine Pass * Galveston Bay, Aransas Bay, San Antonio Bay, and Matagorda Bay A Hurricane Warning is in effect for... * Port O'Connor to Freeport Texas A Hurricane Watch is in effect for... * Freeport to San Luis Pass Texas A Tropical Storm Warning is in effect for... * North of Port Aransas to Port O'Connor * North of Freeport to Sabine Pass A Storm Surge Watch is in effect for... * Sabine Pass to Rutherford Beach Louisiana 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. A Storm Surge Watch means there is a possibility of life-threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic, available at hurricanes.gov. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. Preparations to protect life and property should be rushed to completion. A Hurricane Watch means that hurricane conditions are possible within the watch area. Interests elsewhere in southwestern Louisiana should monitor the progress of Nicholas. 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 PM CDT (0300 UTC), the center of Hurricane Nicholas was located near latitude 28.4 North, longitude 95.8 West. Nicholas is moving toward the north-northeast near 10 mph (17 km/h) and this general motion is expected to continue through tonight, followed by a turn toward the northeast and a slower motion by late Tuesday and an even slower eastward motion on Wednesday. On the forecast track, the center of Nicholas is expected to make landfall along the Texas coast in a few hours, move over extreme southeastern Texas on Tuesday and early Wednesday, and over southwestern Louisiana later on Wednesday. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Little change in strength is likely before landfall, followed by weakening after the center moves inland. Hurricane-force winds extend outward up to 25 miles (35 km) from the center and tropical-storm-force winds extend outward up to 115 miles (185 km). A Weatherflow station at Matagorda Bay recently reported a 1-minute sustained wind of 76 mph (122 km/h) gusting to 95 mph (153 km/h). The estimated minimum central pressure is 988 mb (29.18 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Nicholas 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 RAINFALL: Nicholas is expected to produce storm total rainfall of 6 to 12 inches, with isolated maximum amounts of 18 inches, across the upper Texas coastal areas into Wednesday. Life-threatening flash flooding impacts, especially in urbanized metropolitan areas, are possible across portions of the upper Texas Gulf Coast into far southwestern Louisiana. Across interior southeast Texas into southern-central Louisiana and southern Mississippi, rainfall totals of 4 to 8 inches with locally higher amounts near 10 inches are expected into Thursday. This rainfall may produce areas of considerable flash and urban flooding. The potential for minor to isolated major river flooding exists across the entire region especially in smaller river basins and urban areas. 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 O'Connor, TX to High Island, TX...3-5 ft Matagorda Bay and Galveston Bay...3-5 ft High Island, TX to Rutherford Beach, LA...2-4 ft Port Aransas, TX to Port O'Connor, TX...2-4 ft Aransas Bay and San Antonio Bay...2-4 ft Rutherford Beach, LA to Intracoastal City, LA...1-3 ft Sabine Lake and Calcasieu Lake...1-3 ft Baffin Bay to Port Aransas, TX...1-3 ft Corpus Christi Bay...1-3 ft Mouth of the Rio Grande to Baffin Bay...1-2 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 within the warning area across the central and upper Texas coasts through tonight. Hurricane conditions are possible in the Hurricane Watch area for the next few hours. Hurricane conditions are expected in the warning area for the next few hours. TORNADOES: A tornado or two will be possible through Tuesday morning along the upper Texas and southwest Louisiana coast. SURF: Swells generated by Nicholas will continue affecting portions of the northwest Gulf coast through Tuesday. 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 100 AM CDT. Next complete advisory at 400 AM CDT. $$ Forecaster Pasch/Blake/Papin

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Hurricane Nicholas Forecast Advisory Number 8

2021-09-14 05:22:21| National Hurricane Center (Atlantic)

Issued at 0300 UTC TUE SEP 14 2021 252 WTNT24 KNHC 140321 CCA TCMAT4 HURRICANE NICHOLAS FORECAST/ADVISORY NUMBER 8...CORRECTED NWS NATIONAL HURRICANE CENTER MIAMI FL AL142021 0300 UTC TUE SEP 14 2021 CORRECTED FOR TROPICAL STORM WARNING SUMMARY CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE HURRICANE WATCH SOUTH OF PORT O'CONNOR TEXAS...IS DISCONTINUED...AND THE TROPICAL STORM WARNING SOUTH OF PORT ARANSAS...TEXAS...IS DISCONTINUED. THE HURRICANE WATCH FROM PORT O'CONNOR NORTH TO FREEPORT, TEXAS HAS BEEN UPGRADED TO A HURRICANE WARNING. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * PORT ARANSAS TEXAS TO SABINE PASS * GALVESTON BAY...ARANSAS BAY...SAN ANTONIO BAY...AND MATAGORDA BAY A HURRICANE WARNING IS IN EFFECT FOR... * PORT O'CONNOR TO FREEPORT TEXAS A HURRICANE WATCH IS IN EFFECT FOR... * PORT O'CONNOR TO SAN LUIS PASS TEXAS A TROPICAL STORM WARNING IS IN EFFECT FOR... * NORTH OF PORT ARANSAS TO PORT O'CONNOR * NORTH OF FREEPORT TO SABINE PASS A STORM SURGE WATCH IS IN EFFECT FOR... * SABINE PASS TO RUTHERFORD BEACH LOUISIANA 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 HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS. FOR A DEPICTION OF AREAS AT RISK...PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC...AVAILABLE AT HURRICANES.GOV. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. INTERESTS ELSEWHERE IN SOUTHWESTERN LOUISIANA SHOULD MONITOR THE PROGRESS OF NICHOLAS. HURRICANE CENTER LOCATED NEAR 28.4N 95.8W AT 14/0300Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 25 DEGREES AT 9 KT ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB MAX SUSTAINED WINDS 65 KT WITH GUSTS TO 80 KT. 64 KT....... 20NE 0SE 0SW 0NW. 50 KT....... 50NE 30SE 0SW 0NW. 34 KT.......100NE 100SE 40SW 40NW. 12 FT SEAS..105NE 60SE 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 28.4N 95.8W AT 14/0300Z AT 14/0000Z CENTER WAS LOCATED NEAR 28.1N 96.0W FORECAST VALID 14/1200Z 29.6N 95.4W...INLAND MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 30NE 30SE 0SW 0NW. 34 KT... 50NE 100SE 20SW 20NW. FORECAST VALID 15/0000Z 30.2N 94.8W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 30NE 100SE 20SW 20NW. FORECAST VALID 15/1200Z 30.3N 93.7W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 16/0000Z 30.3N 93.3W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 16/1200Z 30.3N 93.0W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 17/0000Z 30.5N 92.5W...POST-TROP/REMNT LOW 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 18/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.4N 95.8W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 14/0600Z NEXT ADVISORY AT 14/0900Z $$ FORECASTER PASCH

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