Skip Navigation Links
NOAA NOAA United States Department of Commerce

Parts of the U.S. Government are closed. However, because the information this site provides is necessary to protect life and property, it will be updated and maintained during the Federal Government shutdown. For critical weather information, please visit www.weather.gov. To learn more, see www.commerce.gov.

Hurricane HARVEY


ZCZC MIATCMAT4 ALL
TTAA00 KNHC DDHHMM
 
HURRICANE HARVEY FORECAST/ADVISORY NUMBER  21
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092017
1500 UTC FRI AUG 25 2017
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
THE HURRICANE WATCH SOUTH OF PORT MANSFIELD TEXAS TO THE MOUTH OF
THE RIO GRANDE HAS BEEN DISCONTINUED.
 
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 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 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.
 
INTERESTS IN SOUTHWESTERN LOUISIANA SHOULD CONTINUE TO MONITOR THE
PROGRESS OF THIS SYSTEM.
 
HURRICANE CENTER LOCATED NEAR 26.7N  96.0W AT 25/1500Z
POSITION ACCURATE WITHIN  10 NM
 
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT   9 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  947 MB
EYE DIAMETER  15 NM
MAX SUSTAINED WINDS  95 KT WITH GUSTS TO 115 KT.
64 KT....... 30NE  20SE  10SW  20NW.
50 KT....... 50NE  40SE  40SW  30NW.
34 KT.......120NE  90SE  80SW 100NW.
12 FT SEAS..150NE 120SE  90SW 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 26.7N  96.0W AT 25/1500Z
AT 25/1200Z CENTER WAS LOCATED NEAR 26.4N  95.9W
 
FORECAST VALID 26/0000Z 27.6N  96.8W
MAX WIND 105 KT...GUSTS 130 KT.
64 KT... 30NE  25SE  15SW  20NW.
50 KT... 60NE  50SE  40SW  40NW.
34 KT...120NE 100SE  90SW 100NW.
 
FORECAST VALID 26/1200Z 28.4N  97.3W...INLAND
MAX WIND  90 KT...GUSTS 110 KT.
64 KT... 30NE  30SE  20SW  20NW.
50 KT... 60NE  50SE  40SW  40NW.
34 KT...120NE 120SE 100SW 100NW.
 
FORECAST VALID 27/0000Z 28.8N  97.5W...INLAND
MAX WIND  70 KT...GUSTS  85 KT.
64 KT... 20NE  20SE   0SW   0NW.
50 KT... 50NE  50SE  40SW  30NW.
34 KT...100NE 120SE  90SW  80NW.
 
FORECAST VALID 27/1200Z 28.9N  97.6W...INLAND
MAX WIND  55 KT...GUSTS  65 KT.
50 KT... 40NE  40SE  30SW  20NW.
34 KT...100NE 110SE  80SW  50NW.
 
FORECAST VALID 28/1200Z 28.3N  96.8W...INLAND
MAX WIND  35 KT...GUSTS  45 KT.
34 KT...120NE  70SE  50SW   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 29/1200Z 28.5N  95.5W...OVER WATER
MAX WIND  40 KT...GUSTS  50 KT.
 
OUTLOOK VALID 30/1200Z 30.0N  94.5W...INLAND
MAX WIND  40 KT...GUSTS  50 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 26.7N  96.0W
 
NEXT ADVISORY AT 25/2100Z
 
$$
FORECASTER BERG
 
 
NNNN