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Hurricane Nicholas Forecast Advisory Number 8

2021-09-14 05:01:20| National Hurricane Center (Atlantic)

Issued at 0300 UTC TUE SEP 14 2021 000 WTNT24 KNHC 140301 TCMAT4 HURRICANE NICHOLAS FORECAST/ADVISORY NUMBER 8 NWS NATIONAL HURRICANE CENTER MIAMI FL AL142021 0300 UTC TUE SEP 14 2021 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 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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Tropical Storm Nicholas Graphics

2021-09-14 02:01:24| National Hurricane Center (Atlantic)

5-Day Uncertainty Track last updated Tue, 14 Sep 2021 00:01:24 GMT Wind Speed Probabilities last updated Mon, 13 Sep 2021 21:22:45 GMT

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Summary for Tropical Storm Nicholas (AT4/AL142021)

2021-09-14 01:58:49| National Hurricane Center (Atlantic)

...NICHOLAS BRINGING HEAVY RAINS, STRONG WINDS, AND STORM SURGES TO PORTIONS OF THE CENTRAL AND UPPER TEXAS COASTS... As of 7:00 PM CDT Mon Sep 13 the center of Nicholas was located near 28.1, -96.2 with movement NNE at 12 mph. The minimum central pressure was 988 mb with maximum sustained winds of about 70 mph.

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Tropical Storm Nicholas Public Advisory Number 7A

2021-09-14 01:58:49| National Hurricane Center (Atlantic)

Issued at 700 PM CDT Mon Sep 13 2021 000 WTNT34 KNHC 132358 TCPAT4 BULLETIN Tropical Storm Nicholas Intermediate Advisory Number 7A NWS National Hurricane Center Miami FL AL142021 700 PM CDT Mon Sep 13 2021 ...NICHOLAS BRINGING HEAVY RAINS, STRONG WINDS, AND STORM SURGES TO PORTIONS OF THE CENTRAL AND UPPER TEXAS COASTS... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...28.1N 96.2W ABOUT 35 MI...60 KM SSW OF MATAGORDA TEXAS MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNE OR 15 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. 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 Watch is in effect for... * Port Aransas to San Luis Pass Texas A Tropical Storm Warning is in effect for... * Baffin Bay 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 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 700 PM CDT (0000 UTC), the center of Tropical Storm Nicholas was located near latitude 28.1 North, longitude 96.2 West. Nicholas is moving toward the north-northeast near 12 mph (19 km/h) and this general motion is expected to continue through tonight, followed by a turn toward the northeast by late Tuesday. On the forecast track, the center of Nicholas is expected to make landfall along the central Texas coast later tonight. Maximum sustained winds have increased to near 70 mph (110 km/h) with higher gusts. Some additional strengthening is possible during the next few hours, and Nicholas could become a hurricane when it reaches the Texas coast. Weakening is anticipated on Tuesday and Wednesday while Nicholas moves over land. Tropical-storm-force winds extend outward up to 115 miles (185 km) from the center. A WeatherFlow station at Matagorda Bay recently reported a sustained wind of 55 mph (89 km/h) with a gust to 71 mph (115 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 portions of the middle and upper Texas coastal areas through Wednesday. Life-threatening flash flooding impacts, especially in highly urbanized metropolitan areas, are possible across portions of the upper Texas Gulf Coast and 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 through Thursday. This rainfall may produce areas of considerable flash and urban flooding. The potential for minor to isolated moderate river flooding exists across the entire region, along with isolated major river flooding, especially in the 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 San Luis Pass including Matagorda Bay...3-5 ft San Luis Pass to Rutherford Beach, LA including Galveston Bay...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, making outside preparations difficult or dangerous. Hurricane conditions are possible in the Hurricane Watch area as early as this evening. TORNADOES: A couple of tornadoes will be possible through tonight, mainly along the upper Texas 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 complete advisory at 1000 PM CDT. $$ Forecaster Pasch

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