TROPICAL DEPRESSION ISAAC ADVISORY NUMBER 40...CORRECTED
NWS HYDROMETEOROLOGICAL PREDICTION CENTER COLLEGE PARK MD AL092012
1000 PM CDT THU AUG 30 2012
CORRECTED FOR RAINFALL AMOUNTS.
...TROPICAL DEPRESSION ISAAC BRINGING HEAVY RAINFALL AND THE
THREAT OF FLASH FLOODING TO THE LOWER MISSISSIPPI RIVER VALLEY...
SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION
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LOCATION...33.5N 93.0W
ABOUT 85 MILES...135 KM...NE OF SHREVEPORT.
ABOUT 95 MILES...150 KM...SSW OF LITTLE ROCK.
MAXIMUM SUSTAINED WINDS...30 MPH... KM/H
PRESENT MOVEMENT...N OR 000 DEGREES AT 10 MPH...16 KM/H
MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES
WATCHES AND WARNINGS
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A TORNADO WATCH IS IN EFFECT FOR CENTRAL AND SOUTHERN MISSISSIPPI
AS WELL AS PORTIONS OF SOUTHEAST LOUISIANA.
FLOOD AND FLASH FLOOD WATCHES AND WARNINGS ARE IN EFFECT FOR AREAS
OF ARKANSAS...CENTRAL AND SOUTHERN MISSISSIPPI...AND EASTERN
LOUSIANA.
COASTAL FLOOD WARNINGS ARE IN EFFECT FOR PORTIONS OF THE LOUISIANA
AND MISSISSIPPI COASTLINES.
FOR INFORMATION SPECIFIC TO YOUR AREA...INCLUDING POSSIBLE WATCHES
AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE AT WWW.WEATHER.GOV.
DISCUSSION AND 48-HOUR OUTLOOK
------------------------------
AT 1000 PM CDT...0300 UTC...THE CENTER OF ISAAC WAS LOCATED NEAR
LATITUDE 33.5 NORTH...AND LONGITUDE 93.0 WEST. THE SYSTEM IS
EXPECTED TO CONTINUE MOVING NORTHWARD INTO THE MIDDLE MISSISSIPPI
RIVER VALLEY ON FRIDAY BEFORE TURNING NORTHEASTWARD INTO THE OHIO
RIVER VALLEY BY SATURDAY NIGHT.
MAXIMUM SUSTAINED WINDS ARE NEAR 30 MPH... KM/H...WITH HIGHER
GUSTS.
MINIMUM CENTRAL PRESSURE IS 998 MB...29.47 INCHES.
HAZARDS
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RAINFALL...AN ADDITIONAL 3 TO 5 INCHES OF RAIN...WITH LOCALIZED
AMOUNTS AS HIGH AS 8 INCHES...WILL BE POSSIBLE FOR MUCH OF THE
LOWER TO MIDDLE MISSISSIPPI RIVER VALLEY THROUGH LATE SATURDAY.
THESE HEAVY RAINFALL AMOUNTS WILL SPREAD INTO THE OHIO RIVER
VALLEY AND PORTIONS OF THE TENNESSEE RIVER VALLEY ON SUNDAY. BY
SUNDAY NIGHT INTO MONDAY AND TUESDAY...HEAVY RAINS WILL REACH THE
CENTRAL APPALACHIANS. WHILE THE ONGOING DROUGHT WILL TEND TO KEEP
THE THREAT FOR FLASH FLOODING DOWN INITIALLY...VERY HEAVY RAINFALL
OVER THE SAME AREAS WILL LEAD TO AN INCREASING FLASH FLOOD THREAT
OVER TIME.
RAINFALL TOTALS
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SELECTED STORM TOTAL RAINFALL IN INCHES THROUGH 7 PM CDT
...ALABAMA...
GRAND BAY 0.6 NW 11.07
MOBILE/BATES FIELD 9.67
WILMER 7.9 SE 8.75
FAIRHOPE 2.3 N 6.42
DAPHNE 1.8 ESE 5.87
THEODORE 8.0 SSE 5.12
POINT CLEAR 1.6 SSW 5.04
SILVERHILL 0.9 SSE 4.34
FOLEY 2.0 SSW 3.71
...ARKANSAS...
MONTICELLO AIRPORT 2.91
PINE BLUFF/GRIDER FIELD 2.63
EL DORADO/GOODWIN FIELD 1.71
...FLORIDA...
VERO BEACH 5.2 S 16.60
ROYAL PALM BEACH 5.0 W 16.29
BOYNTON BEACH 1.9 NNW 14.41
PORT ST LUCIE 1.5 NE 13.04
ABERDEEN 4.2 NNW 12.41
PALM CITY 4.0 SW 11.69
HOMESTEAD AFB 9.37
FORT PIERCE/ST LUCIE 9.18
WEST PALM BEACH INTL ARPT 8.64
VERO BEACH MUNI ARPT 7.66
FORT LAUDERDALE EXECUTIVE APT 7.02
MIAMI/OPA LOCKA 6.64
POMPANO BEACH AIRPARK 5.33
WINTER HAVEN GILBERT ARPT 5.19
ORLANDO/HERNDON 5.12
HOLLYWOOD/NORTH PERRY ARPT 5.12
...GEORGIA...
GUYTON 1.9 S 5.60
BROOKLET 13.1 SE 4.60
RINCON 1.2 NNW 4.03
MONROE 5.6 NNE 3.11
JESUP 7.1 N 3.04
AUGUSTA/BUSH FIELD 2.53
ALMA/BACON CO. ARPT 2.49
SAVANNAH MUNI ARPT 2.47
FORT STEWART/WRIGHT AAF 2.06
AUGUSTA/DANIEL FIELD 1.95
MOODY AFB/VALDOSTA 1.50
...LOUISIANA...
RESERVE 0.5 SSE 13.46
HAMMOND 2.3 WSW 11.93
TERRYTOWN 3.3 S 10.56
SLIDELL 10.40
NEW ORLEANS/MOISANT 10.29
ABITA SPRINGS 1.9 NE 10.15
BATON ROUGE/RYAN MUNI ARPT 4.57
BOOTHVILLE 4.20
MONROE RGNL ARPT 2.37
PATTERSON MEMORIAL ARPT 2.00
LAFAYETTE RGNL ARPT 1.55
ALEXANDRIA/ESLER 1.50
...MISSISSIPPI...
KILN 3.3 N 17.04
MARION RAWS/COLUMBIA 15.02
SAUCIER 1.7 NNE 12.78
PICAYUNE 5.6 ENE 12.17
DIAMONDHEAD 1.5 NE 12.04
LONG BEACH 0.7 S 11.95
MCCOMB/LEWIS FIELD 10.93
GULFPORT-BILOXI 10.85
PASCAGOULA 10.67
KEESLER AFB/BILOXI 10.17
HATTIESBURG/CHAIN MUNI ARPT 9.44
HATTIESBURG/LAUREL 7.93
JACKSON/HAWKINS FIELD 4.03
MERIDIAN/KEY FIELD 4.00
JACKSON WFO 3.93
MERIDIAN NAS/MCCAIN 1.72
...NORTH CAROLINA...
WILMINGTON/NEW HANOVER CO. ARPT 4.07
JACKSONVILLE/ELLIS AIRPORT 1.50
...SOUTH CAROLINA...
MOUNT PLEASANT 5.5 NNE 9.08
PAWLEYS ISLAND 5.6 NNE 8.36
CHARLESTON 2.8 NE 7.36
JOHNS ISLAND 9.0 SE 6.44
MEGGETT 1.8 W 4.85
BEAUFORT MCAS 3.59
ROCK HILL-YORK CO. ARPT 2.89
DARLINGTON 1.75
NEXT ADVISORY
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NEXT ADVISORY ISSUED AT 400 AM CDT. PLEASE REFER TO YOUR LOCAL
NATIONAL WEATHER SERVICE OFFICE FOR FURTHER INFORMATION ON THIS
STORM.
FORECASTER RYAN
FORECAST POSITIONS
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INITIAL 31/0300Z 33.5N 93.0W
12HR VT 31/1200Z 35.0N 93.3W
24HR VT 01/0000Z 36.9N 93.5W...
36HR VT 01/1200Z 38.3N 92.4W...
48HR VT 02/0000Z 38.9N 90.8W...
72HR VT 03/0000Z 39.0N 88.0W...
96HR VT 04/0000Z 39.0N 86.1W...