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TROPICAL STORM IDA FORECAST/ADVISORY NUMBER  17
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092021
0900 UTC MON AUG 30 2021
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
THE STORM SURGE WARNING HAS BEEN DISCONTINUED FROM MORGAN CITY TO
GRAND ISLE...LOUISIANA.
 
THE HURRICANE AND TROPICAL STORM WARNINGS HAVE BEEN DISCONTINUED
WEST OF GRAND ISLE...LOUISIANA.
 
THE HURRICANE WARNING HAS BEEN REPLACED WITH A TROPICAL STORM
WARNING FROM GRAND ISLE TO THE MOUTH OF THE PEARL RIVER...INCLUDING
LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A STORM SURGE WARNING IS IN EFFECT FOR...
*GRAND ISLE...LOUISIANA...TO THE ALABAMA/FLORIDA BORDER
 
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* GRAND ISLE...LOUISIANA...TO THE ALABAMA/FLORIDA BORDER...INCLUDING
LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS
 
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 TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA.
 
TROPICAL STORM CENTER LOCATED NEAR 31.0N  90.8W AT 30/0900Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE NORTH OR 355 DEGREES AT   7 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  990 MB
MAX SUSTAINED WINDS  50 KT WITH GUSTS TO  70 KT.
50 KT....... 40NE  40SE   0SW   0NW.
34 KT....... 70NE 130SE  40SW   0NW.
12 FT SEAS..  0NE 180SE   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 31.0N  90.8W AT 30/0900Z
AT 30/0600Z CENTER WAS LOCATED NEAR 30.6N  90.8W
 
FORECAST VALID 30/1800Z 32.2N  90.6W...INLAND
MAX WIND  30 KT...GUSTS  45 KT.
 
FORECAST VALID 31/0600Z 33.7N  89.4W...INLAND
MAX WIND  25 KT...GUSTS  35 KT.
 
FORECAST VALID 31/1800Z 35.1N  87.2W...INLAND
MAX WIND  25 KT...GUSTS  35 KT.
 
FORECAST VALID 01/0600Z 36.6N  84.3W...POST-TROP/INLAND
MAX WIND  20 KT...GUSTS  30 KT.
 
FORECAST VALID 01/1800Z 38.1N  80.8W...POST-TROP/INLAND
MAX WIND  20 KT...GUSTS  30 KT.
 
FORECAST VALID 02/0600Z 39.0N  77.4W...POST-TROP/EXTRATROP
MAX WIND  25 KT...GUSTS  35 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 03/0600Z 40.1N  71.5W...POST-TROP/EXTRATROP OVER WATER
MAX WIND  30 KT...GUSTS  40 KT.
 
OUTLOOK VALID 04/0600Z 40.5N  67.2W...POST-TROP/EXTRATROP OVER WATER
MAX WIND  30 KT...GUSTS  40 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 31.0N  90.8W
 
INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 30/1200Z
 
NEXT ADVISORY AT 30/1500Z
 
$$
FORECASTER STEWART
 
 
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