Tropical Storm Isaac BriefingAugust 26, 2012

10:00 CDT

Weather Forecast OfficeSlidell, LA

Satellite ViewsIssued at 10:00 CDT

NHC Official ForecastIssued 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: 10-12 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 call @1300 today.

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