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Hurricane Harvey Forecast Advisory Number 20
2017-08-25 10:45:41| National Hurricane Center (Atlantic)
Issued at 0900 UTC FRI AUG 25 2017 000 WTNT24 KNHC 250845 TCMAT4 HURRICANE HARVEY FORECAST/ADVISORY NUMBER 20 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017 0900 UTC FRI AUG 25 2017 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * PORT MANSFIELD TO HIGH ISLAND TEXAS A STORM SURGE WATCH IS IN EFFECT FOR... * SOUTH OF PORT MANSFIELD TEXAS TO THE MOUTH OF THE RIO GRANDE A HURRICANE WARNING IS IN EFFECT FOR... * PORT MANSFIELD TO SARGENT TEXAS A TROPICAL STORM WARNING IS IN EFFECT FOR... * NORTH OF SARGENT TO HIGH ISLAND TEXAS * SOUTH OF PORT MANSFIELD TEXAS TO THE MOUTH OF THE RIO GRANDE A HURRICANE WATCH IS IN EFFECT FOR... * SOUTH OF PORT MANSFIELD TEXAS TO THE MOUTH OF THE RIO GRANDE A TROPICAL STORM WATCH IS IN EFFECT FOR... * SOUTH OF THE MOUTH OF THE RIO GRANDE TO BOCA DE CATAN MEXICO 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... IN THIS CASE WITHIN THE NEXT 12 TO 24 HOURS. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. 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. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. IN ADDITION... INTERESTS IN SOUTHWESTERN LOUISIANA SHOULD CONTINUE TO MONITOR THE PROGRESS OF THIS SYSTEM. HURRICANE CENTER LOCATED NEAR 25.9N 95.4W AT 25/0900Z POSITION ACCURATE WITHIN 15 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 8 KT ESTIMATED MINIMUM CENTRAL PRESSURE 967 MB EYE DIAMETER 10 NM MAX SUSTAINED WINDS 90 KT WITH GUSTS TO 110 KT. 64 KT....... 20NE 20SE 10SW 20NW. 50 KT....... 30NE 30SE 20SW 30NW. 34 KT.......120NE 50SE 40SW 90NW. 12 FT SEAS..120NE 90SE 75SW 120NW. 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 25.9N 95.4W AT 25/0900Z AT 25/0600Z CENTER WAS LOCATED NEAR 25.6N 95.1W FORECAST VALID 25/1800Z 26.9N 96.3W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 20NE 20SE 10SW 20NW. 50 KT... 30NE 30SE 20SW 30NW. 34 KT...120NE 50SE 40SW 90NW. FORECAST VALID 26/0600Z 28.0N 97.1W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 30NE 30SE 20SW 30NW. 50 KT... 60NE 50SE 40SW 50NW. 34 KT...130NE 100SE 70SW 100NW. FORECAST VALID 26/1800Z 28.5N 97.4W...INLAND MAX WIND 65 KT...GUSTS 80 KT. 64 KT... 20NE 20SE 0SW 0NW. 50 KT... 60NE 60SE 50SW 40NW. 34 KT...120NE 120SE 80SW 70NW. FORECAST VALID 27/0600Z 28.5N 97.5W...INLAND MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 40NE 40SE 30SW 20NW. 34 KT...120NE 100SE 70SW 50NW. FORECAST VALID 28/0600Z 28.3N 97.0W...INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT...100NE 100SE 30SW 0NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 29/0600Z 28.5N 96.0W...OVER WATER MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 30/0600Z 29.5N 95.0W...INLAND MAX WIND 35 KT...GUSTS 45 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.9N 95.4W NEXT ADVISORY AT 25/1500Z $$ FORECASTER AVILA
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