Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 137, NWS Jacksonville, FL

June 1, 2008Marion County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 1, 2008, 2:18 PM EDT for Marion County, Florida. It was in force for 42 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
Jun 1, 2008, 2:18 PM EDT (18:18 UTC)
Expired
Jun 1, 2008, 3:00 PM EDT
In force
42 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

County Marion County, FL

The radar

The Jacksonville radar (KJAX), 146 km from the middle of the area, began a volume at 18:18 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.3 hours before the alert went out and 171 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, Tampa Bay, FL at 12:00Z on 2008-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1476 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2008-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.1939Sfc1 km3 km6 km9 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
1476 J/kg
Mixed-layer CIN
-54 J/kg
Mixed-layer LCL
852 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
26 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 Jun 1, 9:06 AM EDT, 5 hours 12 minutes earlier.

Area forecast discussion, Jun 1, 9:06 AM EDT, 5 hours 12 minutes before
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Hazardous weather outlook, Jun 1, 5:16 AM EDT, 9 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE JACKSONVILLE FL
516 AM EDT SUN JUN 1 2008

FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-020930-
HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY-
ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE-
JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY-
INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN-
COASTAL CAMDEN-
516 AM EDT SUN JUN 1 2008

THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

A WEAK AREA OF LOW PRESSURE WILL TRACK THROUGH THE DEEP SOUTH
TODAY AND COMBINE WITH AN UPPER LEVEL DISTURBANCE TO PRODUCE A
BROKEN LINE OF SHOWERS AND THUNDERSTORMS NORTH OF THE AREA.
THROUGH THE EVENING HOURS...THIS ACTIVITY WILL SINK SOUTHWARD TO
AFFECT THE GEORGIA PORTION OF THE FORECAST AREA WITH SCATTERED
SHOWERS AND THUNDERSTORMS.

MEANWHILE...A SEPARATE AREA OF SCATTERED ACTIVITY IS EXPECTED TO
FORM ALONG THE EAST AND WEST COAST SEABREEZE COLLISION. THIS IS
EXPECTED TO OCCUR ALONG THE INTERSTATE 95 CORRIDOR OF NORTHEAST
FLORIDA LATE THIS AFTERNOON. BOTH AREAS OF DISTURBED WEATHER WILL
HAVE THE POTENTIAL FOR ISOLATED STRONG WIND GUSTS...SMALL HAIL AND
FREQUENT CLOUD TO GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

SCATTERED SHOWERS AND THUNDERSTORMS WILL AFFECT THE AREA MONDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

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

DEESE

In the hours before

Special weather statement, Jun 1, 1:50 PM EDT, 28 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 9:45 PM EDTAreal Flood AdvisoryJAXAlachua, Marion90 min
May 31, 9:48 PM EDTSevere Thunderstorm WarningJAXMarion28 min
Jun 1, 2:31 PM EDTAreal Flood AdvisoryJAXMarion119 min
Jun 1, 3:53 PM EDTSpecial Marine WarningJAX67 min
Jun 1, 4:25 PM EDTSevere Thunderstorm WarningJAXAlachua35 min
Jun 1, 4:38 PM EDTAreal Flood AdvisoryJAXAlachua2 hr
Jun 1, 5:09 PM EDTSevere Thunderstorm WarningJAXDuval, Saint Johns36 min
Jun 1, 5:27 PM EDTSevere Thunderstorm WarningJAXDuval, Saint Johns33 min
Jun 1, 5:45 PM EDTAreal Flood AdvisoryJAXDuval, Saint Johns90 min
Jun 1, 6:06 PM EDTAreal Flood AdvisoryJAXClay, Duval, Saint Johns84 min
Jun 1, 6:11 PM EDTSevere Thunderstorm WarningJAXClay, Duval34 min
Jun 1, 6:45 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau45 min
Jun 1, 6:48 PM EDTSevere Thunderstorm WarningJAXBradford, Clay27 min
Jun 1, 7:03 PM EDTAreal Flood AdvisoryJAXDuval, Nassau87 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008Every 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; radar from the NEXRAD Level II archive.