Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 79, NWS Jacksonville, FL

April 5, 2008Columbia County, Suwannee County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 5, 2008, 5:00 PM EDT for Columbia County, Suwannee County, Florida. It was in force for 75 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: Apr 5, 2008, 5:00 PM EDT (21:00 UTC)
Expired: Apr 5, 2008, 6:15 PM EDT
In force: 75 min
Issued by: NWS Jacksonville, FL
Area: Storm-based polygon

Counties Columbia County, FL, Suwannee County, FL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 5, 11:25 AM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.0 hours before the alert went out and 145 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: 1506 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 121 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.6

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 Apr 5, 2:15 PM EDT, 2 hours 45 minutes earlier.

Area forecast discussion, Apr 5, 2:15 PM EDT, 2 hours 45 minutes before

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Hazardous weather outlook, Apr 5, 11:41 AM EDT, 5 hours 19 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1141 AM EDT SAT APR 5 2008

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-061000-
ALACHUA-APPLING-ATKINSON-BACON-BAKER-BRADFORD-BRANTLEY-
CAMDEN (COASTAL)-CAMDEN (INLAND)-CHARLTON-CLAY-CLINCH-COFFEE-
COLUMBIA-DUVAL-ECHOLS-FLAGLER-GILCHRIST-GLYNN (COASTAL)-
GLYNN (INLAND)-HAMILTON-JEFF DAVIS-MARION-NASSAU-PIERCE-PUTNAM-
ST JOHNS-SUWANNEE-UNION-WARE-WAYNE-
1141 AM EDT SAT APR 5 2008

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR SOUTHEAST GEORGIA AND
NORTHEAST FLORIDA THROUGH 7 PM...
...A MODERATE RIP CURRENT RISK CONTINUES FOR AREA BEACHES...

STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON INTO
THIS EVENING WITH THE APPROACH OF AN UPPER LEVEL DISTURBANCE AND
SURFACE COLD FRONT. LOCALLY HEAVY RAINFALL...HAIL...AND DAMAGING
WINDS ARE POSSIBLE WITH THE STRONGER STORMS. STORMS WILL CONTINUE TO
AFFECT THE SUWANNEE RIVER VALLEY OF NORTHEAST FLORIDA AND SOUTHEAST
GEORGIA EARLY THIS AFTERNOON AND MOVE NORTHEAST AROUND 30 TO 40
MPH. STORMS WILL ADVANCE EAST TOWARD THE FLORIDA ATLANTIC COAST LATE
THIS AFTERNOON INTO THE EVENING HOURS.

LINGERING OCEAN SWELLS WILL MAINTAIN A MODERATE RIP CURRENT RISK FOR
AREA BEACHES. PLEASE REFER TO THE SURF ZONE FORECAST FOR ADDITIONAL
INFORMATION.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

THUNDERSTORMS CAN BE EXPECTED SUNDAY AND MONDAY MAINLY OVER
NORTHEAST FLORIDA. LOCALLY HEAVY DOWNPOURS...GUSTY WINDS...SMALL
HAIL...AND FREQUENT CLOUD TO GROUND LIGHTNING CAN BE EXPECTED IN THE
STRONGER STORMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS REQUESTED TODAY AND THIS EVENING.

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

ENYEDI

In the hours before

Special weather statement, Apr 5, 3:53 PM EDT, 1 hour 7 minutes before

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Special weather statement, Apr 5, 4:02 PM EDT, 58 minutes before

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Local storm report, Apr 5, 4:17 PM EDT, 43 minutes before

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Special weather statement, Apr 5, 4:27 PM EDT, 33 minutes before

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Local storm report, Apr 5, 4:32 PM EDT, 28 minutes before

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Special weather statement, Apr 5, 4:39 PM EDT, 21 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
Apr 4, 8:34 PM EDT	Special Marine Warning	JAX		57 min
Apr 5, 12:55 PM EDT	Severe Thunderstorm Warning	JAX	Nassau	50 min
Apr 5, 1:15 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Union	45 min
Apr 5, 1:27 PM EDT	Severe Thunderstorm Warning	JAX	Columbia, Hamilton, Suwannee	48 min
Apr 5, 1:42 PM EDT	Special Marine Warning	JAX		2 hr
Apr 5, 1:50 PM EDT	Severe Thunderstorm Warning	JAX	Marion	49 min
Apr 5, 2:01 PM EDT	Severe Thunderstorm Warning	JAX	Clay, Putnam	44 min
Apr 5, 2:16 PM EDT	Severe Thunderstorm Warning	JAX	Hamilton	44 min
Apr 5, 3:29 PM EDT	Severe Thunderstorm Warning	JAX	Saint Johns	29 min
Apr 5, 3:32 PM EDT	Special Marine Warning	JAX		118 min
Apr 5, 3:32 PM EDT	Severe Thunderstorm Warning	JAX	Duval	43 min
Apr 5, 4:13 PM EDT	Severe Thunderstorm Warning	JAX	Marion	47 min
Apr 5, 4:15 PM EDT	Severe Thunderstorm Warning	JAX	Duval	20 min
Apr 5, 5:34 PM EDT	Special Marine Warning	JAX		116 min
Apr 5, 5:38 PM EDT	Special Marine Warning	JAX		52 min
Apr 5, 5:41 PM EDT	Severe Thunderstorm Warning	JAX	Alachua, Gilchrist	49 min
Apr 5, 6:14 PM EDT	Severe Thunderstorm Warning	JAX	Baker, Bradford, Columbia, Union	61 min
Apr 5, 6:30 PM EDT	Severe Thunderstorm Warning	JAX	Alachua	60 min
Apr 5, 7:03 PM EDT	Severe Thunderstorm Warning	JAX	Bradford, Clay	72 min
Apr 5, 7:37 PM EDT	Special Marine Warning	JAX		113 min
Apr 5, 6:29 AM EDT	Severe Thunderstorm Warning	JAX	Clinch, Ware	46 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every severe thunderstorm warning in 2008

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.