Tropical Storm Isaac Briefing August 26, :00 CDT Weather Forecast Office Slidell, LA

Satellite Views Issued at 10:00 CDT

NHC Official Forecast Issued at 10:00 CDT

Model Output Track

Model Output Intensity

Tropical Storm Wind Speed Probabilities Issued at 10:00 CDT

Wave Heights 1PM Monday

Wave Heights 1AM Tuesday

Wave Heights 1PM Tuesday

Southwest Pass Monday winds: NE 25 kt seas: 5 ft mostly SE swell with periods 6 sec tides: 2 ft above normal Tuesday AM winds: N 30 kt gusts to 35 kt seas: 8-10 ft mostly SE swell with periods 7 to 8 sec tides: 3 ft above normal Tuesday PM winds: NW 35 kt gusts to 40 kt seas: ft mostly SE swell with periods 8 to 10 sec tides: 4 ft above normal

Summary Overall track forecast has shifted significantly to the west. A hurricane watch is now in effect across all coastal MS and across coastal LA to Morgan City. The current forecast could have major impacts for the Louisiana and Mississippi coastal waters beginning by Monday and Tuesday. Tropical storm force wind probabilities are 80 to 90% for the MS coastal waters and 40 to 80% for the Louisiana coastal waters. Hurricane force wind probabilities have now increased and are 15 to 30% for the MS coastal waters and 5 to 15% for the LA coastal waters.

Updates Next conference today.

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