Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 84, NWS Jacksonville, FL

May 25, 2009Clay County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at May 25, 2009, 7:06 PM EDT for Clay County, Florida. It was in force for 39 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 25, 2009, 7:06 PM EDT (23:06 UTC)
Expired
May 25, 2009, 7:45 PM EDT
In force
39 min
Issued by
NWS Jacksonville, FL
Area
Storm-based polygon

County Clay County, FL

The radar

The Jacksonville radar (KJAX), 58 km from the middle of the area, began a volume at 23:08 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, 11.1 hours before the alert went out and 214 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 2009-05-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 46 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 2009-05-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
46 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
1058 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
10 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 25, 4:07 PM EDTSpecial Weather StatementJAXMarion38 min
May 25, 4:15 PM EDTSevere Thunderstorm WarningJAXMarion45 min
May 25, 4:42 PM EDTSpecial Weather StatementJAXMarion48 min
May 25, 5:11 PM EDTSpecial Weather StatementJAXMarion49 min
May 25, 5:20 PM EDTSpecial Weather StatementJAXAlachua40 min
May 25, 5:22 PM EDTSpecial Weather StatementJAXMarion38 min
May 25, 5:28 PM EDTSpecial Weather StatementJAXColumbia32 min
May 25, 5:39 PM EDTSpecial Weather StatementJAXGilchrist51 min
May 25, 6:02 PM EDTSpecial Weather StatementJAXColumbia43 min
May 25, 6:05 PM EDTSpecial Weather StatementJAXPutnam40 min
May 25, 6:14 PM EDTSpecial Weather StatementJAXUnion46 min
May 25, 6:35 PM EDTSpecial Weather StatementJAXClay40 min
May 25, 6:44 PM EDTSpecial Weather StatementJAXPutnam46 min
May 25, 7:01 PM EDTSpecial Weather StatementJAXBradford29 min
May 25, 7:02 PM EDTSpecial Weather StatementJAXBaker43 min
May 25, 7:49 PM EDTSpecial Weather StatementJAXClay41 min
May 25, 7:58 PM EDTSpecial Weather StatementJAXNassau47 min
May 24, 8:05 PM EDTSpecial Weather StatementJAXBacon40 min
May 24, 8:11 PM EDTSpecial Weather StatementJAXJeff Davis34 min
May 24, 8:42 PM EDTSpecial Weather StatementJAXJeff Davis33 min
May 24, 8:43 PM EDTAreal Flood AdvisoryJAXBacon, Jeff Davis2 hr
May 25, 5:57 PM EDTSpecial Weather StatementJAXAppling33 min
May 25, 7:42 PM EDTSpecial Weather StatementJAXCharlton, Ware33 min
May 25, 7:44 PM EDTSpecial Weather StatementJAXCharlton, Ware31 min

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; radar from the NEXRAD Level II archive.