Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 87, NWS Jacksonville, FL

May 26, 20095 counties in Florida; Charlton County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at May 26, 2009, 4:11 PM EDT for 5 counties in Florida; Charlton County, Georgia. It was in force for 21 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 26, 2009, 4:11 PM EDT (20:11 UTC)
Expired
May 26, 2009, 4:32 PM EDT
In force
21 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

Counties Baker County, FL, Bradford County, FL, Clay County, FL, Duval County, FL, Nassau County, FL, Charlton County, GA

The radar

The Jacksonville radar (KJAX), 31 km from the middle of the area, began a volume at 20:13 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 8.2 hours before the alert went out and 252 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, Cape Canaveral, FL at 12:00Z on 2009-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 341 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, Cape Canaveral, FL at 12:00Z on 2009-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
341 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1016 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
44 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 26, 1:51 PM EDTSpecial Weather StatementJAXAlachua39 min
May 26, 2:36 PM EDTSpecial Weather StatementJAXAlachua39 min
May 26, 3:09 PM EDTSpecial Weather StatementJAXMarion51 min
May 26, 3:10 PM EDTSpecial Weather StatementJAXBaker50 min
May 26, 3:26 PM EDTSevere Thunderstorm WarningJAXAlachua, Marion, Putnam49 min
May 26, 3:47 PM EDTSevere Thunderstorm WarningJAXBradford, Clay, Putnam43 min
May 26, 3:54 PM EDTSpecial Weather StatementJAXBaker51 min
May 26, 4:17 PM EDTSpecial Weather StatementJAXPutnam, Saint Johns58 min
May 26, 4:32 PM EDTSpecial Weather StatementJAXClay43 min
May 26, 4:51 PM EDTSpecial Weather StatementJAXSaint Johns39 min
May 26, 4:55 PM EDTSevere Thunderstorm WarningJAXClay, Duval, Saint Johns50 min
May 26, 5:07 PM EDTSpecial Marine WarningJAX83 min
May 26, 5:12 PM EDTSpecial Weather StatementJAXNassau48 min
May 25, 8:14 PM EDTSpecial Weather StatementJAXWare31 min
May 26, 3:16 PM EDTSpecial Weather StatementJAXAtkinson, Clinch, Echols29 min
May 26, 3:46 PM EDTSpecial Weather StatementJAXAtkinson, Clinch, Coffee29 min
May 26, 4:42 PM EDTSpecial Weather StatementJAXAppling, Bacon, Jeff Davis, Pierce18 min

Nearby

Severe Thunderstorm Warnings in Florida, 2009Severe Thunderstorm Warnings in Georgia, 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; radar from the NEXRAD Level II archive.