Alert archive / Georgia / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 7, NWS Jacksonville, FL

March 13, 1993Chatham County, Effingham County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Mar 13, 1993, 2:42 AM EST for Chatham County, Effingham County, Georgia. It was in force for 48 min.

The area

The counties it named.

The facts

Issued
Mar 13, 1993, 2:42 AM EST (07:42 UTC)
Expired
Mar 13, 1993, 3:30 AM EST
In force
48 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

Counties Chatham County, GA, Effingham County, GA

The nearest sounding before it

Jacksonville, FL (KAYS), launched 00:00Z, 7.7 hours before the alert went out and 191 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Jacksonville, FL at 00:00Z on 1993-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 232 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 1993-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 200 square meters per square second.19395878Sfc1 km3 km6 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
232 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
827 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
200 m²/s²
0-3 km storm-relative helicity
350 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Mar 12, 10:17 PM EST, 4 hours 25 minutes before
FLZ008-007-009-012-GAZ013-015-130615-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1009 PM EST FRI MAR 12 1993

....A TORNADO WATCH IN EFFECT FOR THE FOLLOWING COUNTIES OF NORTHEAST
FLORIDA AND SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS UNTIL 4AM
SATURDAY MORNING...COLUMBIA...GILCHRIST...NASSAU...BAKER...HAMILTON..
UNION...BRADFORD...DUVAL...LAFAYETTE...SUWANNEE...CAMDEN GA...CHARLTON
GA...

...A TORNADO WATCH IS IN EFFECT FOR THE FOLLOWING COUNTIES OF NORTHEAST
FLORIDA AND THE ADJACENT COASTAL WATERS  UNTIL 7AM SATURDAY MORNING...
ALACHUA...CLAY...LEVY...MARION...PUTNAM...AND ST JOHNS...

AT 10 PM EST...THUNDERSTORMS IN THE NORTHERN GULF OF MEXICO WILL BE
MOVING ONSHORE THE WEST COAST OF FLORIDA LATE TONIGHT AND THROUGHOUT
MOST OF SATURDAY MORNING. SOME OF THESE THUNDERSTORMS MAY BECOME
SEVERE WITH STRONG GUSTY WINDS...FREQUENT LIGHTNING...HEAVY RAINFALL AND
HAIL. TORNADOS ARE ALWAYS POSSIBLE WHEN SEVERE THUNDERSTORMS DEVELOP
AT THIS TIME OF YEAR.

THE THUNDERSTORMS ARE MOVING EAST NORTHEAST AT 40 MILES AN HOUR.

RESIDENTS IN THE WATCH AREA SHOULD BE PREPARED IF SEVERE WEATHER IMPACTS
YOUR AREA IN THE NEXT 8 HOURS. MARINE INTERESTS SHOULD STAY IN PORT
TONIGHT AS WINDS WILL BE GUSTY AND SEAS WILL BE ROUGH.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER STATEMENTS.

The office that day

Everything else NWS Jacksonville, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 13, 12:29 AM ESTTornado WarningJAXAlachua, Bradford, Union61 min
Mar 13, 1:24 AM ESTTornado WarningJAXDuval, Nassau36 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1993Every severe thunderstorm warning in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.