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TROPICAL STORM EDOUARD DISCUSSION NUMBER 4
NATIONAL WEATHER SERVICE MIAMI FL
11 AM EDT MON SEP 02 2002
MOST RECENT RECONNAISSANCE REPORTS INDICATE THAT THERE HAS BEEN
LITTLE CHANGE WITH EDOUARD THIS MORNING...WITH THE PRESSURE HOLDING
STEADY AT 1007 MB AND PEAK FLIGHT-LEVEL WINDS NEAR 45 KT. THE
CENTER WAS EXPOSED TO THE WEST OF THE DEEP CONVECTION UNTIL A RECENT
BURST OBSCURED IT.
THE NET MOTION OVER THE PAST 6-12 HOURS HAS BEEN NORTHWARD...BUT
EAST OF NORTH MORE RECENTLY. A MID-LEVEL TROUGH TO THE NORTH OF THE
CYCLONE IS PASSING THE SYSTEM BY...AND SHOULD LEAVE EDOUARD IN A
VERY WEAK STEERING ENVIRONMENT FOR THE NEXT COUPLE OF DAYS. AS
HEIGHTS BUILD OVER THE SOUTHEASTERN STATES...EDOUARD IS LIKELY TO
RESPOND BY DRIFTING BACK TOWARD THE COAST. THERE IS A CLUSTERING OF
MODEL GUIDANCE...LED BY THE AVN AND GFDL...TAKING THE SYSTEM
ULTIMATELY INLAND IN NORTH FLORIDA OR SOUTH GEORGIA. THE TIMING OF
THIS WESTWARD TURN IS UNCERTAIN...BUT FORECASTS OF THE MID-LEVEL
FLOW FROM THE AVN AND UKMET SUGGEST THAT NOT MORE THAN 12 TO 24
HOURS OF NORTHWARD MOTION IS LIKELY. AS A RESULT...THE OFFICIAL
FORECAST HAS BEEN SHIFTED SOUTHWARD FROM THE PREVIOUS ADVISORY.
THE UPPER-LEVEL ENVIRONMENT...WITH MODERATE WESTERLY SHEAR...IS NOT
FAVORABLE. IN SPITE OF THIS...THE SHIPS GUIDANCE SUGGESTS
STRENGTHENING. GIVEN THAT THE UPPER-LEVEL WINDS ARE NOT EXPECTED TO
ABATE MUCH...EVEN AFTER THE MID-LEVEL FLOW TURNS...THE OFFICIAL
FORECAST CONTINUES TO BE BELOW THIS GUIDANCE. IT IS QUITE POSSIBLE
THAT THE SHEAR WILL DO EDOUARD IN ENTIRELY.
FORECASTER FRANKLIN
FORECAST POSITIONS AND MAX WINDS
INITIAL 02/1500Z 30.5N 79.4W 35 KTS
12HR VT 03/0000Z 30.9N 79.4W 40 KTS
24HR VT 03/1200Z 31.2N 79.4W 45 KTS
36HR VT 04/0000Z 31.3N 79.6W 50 KTS
48HR VT 04/1200Z 31.3N 80.0W 50 KTS
72HR VT 05/1200Z 31.0N 80.5W 50 KTS
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