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HURRICANE IDA FORECAST/ADVISORY NUMBER  15
NWS NATIONAL HURRICANE CENTER MIAMI FL       AL092021
2100 UTC SUN AUG 29 2021
 
CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY...
 
THE HURRICANE WARNING ALONG THE COAST OF LOUISIANA FROM MORGAN
CITY TO INTRACOASTAL CITY HAS BEEN CHANGED TO A TROPICAL STORM
WARNING.
 
THE TROPICAL STORM WARNING FROM CAMERON TO INTRACOASTAL CITY
LOUISIANA HAS BEEN DISCONTINUED.
 
THE STORM SURGE WARNING WEST OF MORGAN CITY HAS BEEN DISCONTINUED.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
A STORM SURGE WARNING IS IN EFFECT FOR...
* MORGAN CITY LOUISIANA TO THE ALABAMA/FLORIDA BORDER
* LAKE BORGNE...LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND MOBILE BAY
 
A HURRICANE WARNING IS IN EFFECT FOR...
* MORGAN CITY LOUISIANA TO THE MOUTH OF THE PEARL RIVER
* LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND METROPOLITAN NEW ORLEANS
 
A TROPICAL STORM WARNING IS IN EFFECT FOR...
* INTRACOASTAL CITY LOUISIANA TO WEST OF MORGAN CITY LOUISIANA
* MOUTH OF THE PEARL RIVER TO THE ALABAMA/FLORIDA BORDER
 
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.
 
A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE
EXPECTED SOMEWHERE WITHIN THE WARNING AREA.
 
HURRICANE CENTER LOCATED NEAR 29.5N  90.6W AT 29/2100Z
POSITION ACCURATE WITHIN  15 NM
 
PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT   9 KT
 
ESTIMATED MINIMUM CENTRAL PRESSURE  938 MB
EYE DIAMETER  15 NM
MAX SUSTAINED WINDS 115 KT WITH GUSTS TO 140 KT.
64 KT....... 40NE  35SE  20SW  25NW.
50 KT....... 70NE  60SE  40SW  40NW.
34 KT.......130NE 120SE  80SW  80NW.
12 FT SEAS..180NE 180SE 150SW   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 29.5N  90.6W AT 29/2100Z
AT 29/1800Z CENTER WAS LOCATED NEAR 29.2N  90.3W
 
FORECAST VALID 30/0600Z 30.7N  90.9W...INLAND
MAX WIND  65 KT...GUSTS  90 KT.
64 KT... 25NE  25SE  10SW  15NW.
50 KT... 50NE  50SE  25SW  30NW.
34 KT... 80NE 100SE  70SW  60NW.
 
FORECAST VALID 30/1800Z 32.4N  90.7W...INLAND
MAX WIND  35 KT...GUSTS  50 KT.
34 KT... 60NE  60SE  30SW  30NW.
 
FORECAST VALID 31/0600Z 34.0N  89.4W...INLAND
MAX WIND  25 KT...GUSTS  40 KT.
 
FORECAST VALID 31/1800Z 35.6N  87.2W...INLAND
MAX WIND  25 KT...GUSTS  35 KT.
 
FORECAST VALID 01/0600Z 37.1N  84.2W...POST-TROP/INLAND
MAX WIND  20 KT...GUSTS  30 KT.
 
FORECAST VALID 01/1800Z 38.6N  80.5W...POST-TROP/EXTRATROP
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 02/1800Z 41.3N  72.5W...POST-TROP/EXTRATROP
MAX WIND  30 KT...GUSTS  40 KT.
 
OUTLOOK VALID 03/1800Z 43.8N  67.0W...POST-TROP/EXTRATROP
MAX WIND  35 KT...GUSTS  45 KT.
 
REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 29.5N  90.6W
 
INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 30/0000Z
 
NEXT ADVISORY AT 30/0300Z
 
$$
FORECASTER BROWN
 
 
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