Hurricane Harvey

Forecast Advisory 23



113
WTNT24 KNHC 260259
TCMAT4

HURRICANE HARVEY FORECAST/ADVISORY NUMBER 23
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017
0300 UTC SAT AUG 26 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 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

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.

A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA... IN THIS CASE WITHIN THE NEXT
FEW HOURS. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD ALREADY
BE COMPLETE.

INTERESTS IN SOUTHWESTERN LOUISIANA SHOULD CONTINUE TO MONITOR THE
PROGRESS OF THIS SYSTEM.

HURRICANE CENTER LOCATED NEAR 28.0N 97.0W AT 26/0300Z...ON COAST
POSITION ACCURATE WITHIN 10 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT 6 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 938 MB
EYE DIAMETER 15 NM
MAX SUSTAINED WINDS 115 KT WITH GUSTS TO 140 KT.
64 KT....... 35NE 25SE 20SW 25NW.
50 KT....... 60NE 40SE 40SW 40NW.
34 KT.......120NE 90SE 80SW 70NW.
12 FT SEAS..210NE 180SE 90SW 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 28.0N 97.0W AT 26/0300Z
AT 26/0000Z CENTER WAS LOCATED NEAR 27.8N 96.8W...ON COAST

FORECAST VALID 26/1200Z 28.6N 97.3W...INLAND
MAX WIND 95 KT...GUSTS 115 KT.
64 KT... 25NE 20SE 15SW 20NW.
50 KT... 40NE 50SE 30SW 30NW.
34 KT...120NE 100SE 70SW 70NW.

FORECAST VALID 27/0000Z 29.0N 97.7W...INLAND
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 15NE 15SE 15SW 15NW.
50 KT... 30NE 30SE 30SW 30NW.
34 KT... 90NE 100SE 60SW 60NW.

FORECAST VALID 27/1200Z 29.0N 97.9W...INLAND
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 20SE 20SW 20NW.
34 KT... 60NE 80SE 50SW 50NW.

FORECAST VALID 28/0000Z 28.7N 97.8W...INLAND
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 60NE 70SE 50SW 50NW.

FORECAST VALID 29/0000Z 28.0N 97.5W...INLAND
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 60NE 60SE 40SW 40NW.

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 30/0000Z 28.5N 96.5W...INLAND
MAX WIND 40 KT...GUSTS 50 KT.

OUTLOOK VALID 31/0000Z 29.5N 96.0W...INLAND
MAX WIND 35 KT...GUSTS 45 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 28.0N 97.0W

NEXT ADVISORY AT 26/0900Z

$$
FORECASTER BEVEN