Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 66, NWS Jacksonville, FL

May 13, 2009Gilchrist County, Suwannee County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at May 13, 2009, 6:54 PM EDT for Gilchrist County, Suwannee County, Florida. It was in force for 34 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
May 13, 2009, 6:54 PM EDT (22:54 UTC)
Expired
May 13, 2009, 7:28 PM EDT
In force
34 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Gilchrist County, FL, Suwannee County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 10.9 hours before the alert went out and 255 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 2009-05-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 601 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 2009-05-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
601 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
949 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
84 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 1:03 PM EDTSpecial Weather StatementJAXMarion87 min
May 13, 1:59 PM EDTSpecial Weather StatementJAXMarion31 min
May 13, 2:34 PM EDTSpecial Weather StatementJAXPutnam26 min
May 13, 2:52 PM EDTSpecial Weather StatementJAXMarion23 min
May 13, 3:18 PM EDTSpecial Weather StatementJAXMarion57 min
May 13, 3:52 PM EDTSpecial Weather StatementJAXPutnam53 min
May 13, 4:14 PM EDTSpecial Weather StatementJAXCitrus31 min
May 13, 4:50 PM EDTSpecial Weather StatementJAXPutnam40 min
May 13, 4:51 PM EDTAreal Flood AdvisoryJAXMarion54 min
May 13, 5:00 PM EDTAreal Flood AdvisoryJAXPutnam60 min
May 13, 5:39 PM EDTSpecial Weather StatementJAXGilchrist36 min
May 13, 5:53 PM EDTSevere Thunderstorm WarningJAXAlachua, Gilchrist52 min
May 13, 6:34 PM EDTSpecial Weather StatementJAXGilchrist26 min
May 13, 6:40 PM EDTAreal Flood AdvisoryJAXGilchrist2 hr

Nearby

Severe Thunderstorm Warnings in Florida, 2009Every severe thunderstorm warning in 2009

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.