Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 234, NWS Jacksonville, FL

August 4, 2003Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Aug 4, 2003, 2:37 PM EDT for Marion County, Florida. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 4, 2003, 2:37 PM EDT (18:37 UTC)
Expired: Aug 4, 2003, 3:15 PM EDT
In force: 38 min
Issued by: NWS Jacksonville, FL
Area: Counties, with a storm outline in the text

County Marion County, FL

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.6 hours before the alert went out and 148 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 436 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 31 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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.

NWS Jacksonville, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 10:15 AM EDT, 4 hours 22 minutes earlier.

Area forecast discussion, Aug 4, 10:15 AM EDT, 4 hours 22 minutes before

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Hazardous weather outlook, Aug 4, 12:45 PM EDT, 1 hour 52 minutes before

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-042200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1245 PM EDT MON AUG 4 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST
GEORGIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT...
NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP DURING
THE AFTERNOON AND LINGER INTO THE EVENING. SCATTERED STORMS WERE JUST
EAST OF INTERSTATE 75 IN NORTH FLORIDA AND ALONG INTERSTATE 10
AROUND NOON. ANOTHER AREA OF SHOWERS WITH A FEW STORMS WAS ALONG THE
INTERSTATE 95 CORRIDOR IN SOUTHEAST GEORGIA. CONVECTION IS MOVING TO
THE EAST AROUND 10 TO 15 MPH. THE STRONGEST STORMS WILL BE
ACCOMPANIED BY DEADLY AND FREQUENT CLOUD TO GROUND LIGHTNING...
PERIODS OF HEAVY RAINFALL WITH LOCAL AMOUNTS POSSIBLY IN EXCESS OF 2
INCHES...AS WELL AS WIND GUSTS POSSIBLY TO 50 MPH. LOCALIZED MINOR
FLOODING IS POSSIBLE...ESPECIALLY IN AREAS NORTH OF HIGHWAY 32 AND
WEST OF HIGHWAY 84 IN SOUTHEAST GEORGIA WHERE THE GROUND IS MORE THAN
SATURATED FROM RECENT HEAVY RAINS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...SCATTERED TO
NUMEROUS THUNDERSTORMS ARE EXPECTED EACH DAY MAINLY DURING THE
AFTERNOON AND EVENING. LOCALIZED FLOODING IS POSSIBLE.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME...BUT SPOTTERS
ARE REQUESTED TO SELF-ACTIVATE THIS AFTERNOON AND EVENING IF WARNINGS
ARE ISSUED IN YOUR AREA.

FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
JACKSONVILLE WEBSITE ON THE INTERNET AT WWW.SRH.NOAA.GOV/JAX.

ABE

In the hours before

Local storm report, Aug 4, 10:08 AM EDT, 4 hours 29 minutes before

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Special weather statement, Aug 4, 2:14 PM EDT, 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 4:12 PM EDT	Special Marine Warning	JAX		33 min
Aug 3, 8:49 PM EDT	Flash Flood Warning	JAX	Coffee, Jeff Davis	56 min
Aug 3, 9:33 PM EDT	Flash Flood Warning	JAX	Appling	87 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003 Every severe thunderstorm warning in 2003

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.