Alert archive / Florida / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 43, NWS Tampa Bay, FL

May 26, 2009Highlands County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at May 26, 2009, 4:30 PM EDT for Highlands County, Florida. It was in force for 30 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, 4:30 PM EDT (20:30 UTC)
Expired
May 26, 2009, 5:00 PM EDT
In force
30 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon

County Highlands County, FL

The radar

The Melbourne radar (KMLB), 109 km from the middle of the area, began a volume at 20:32 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, 8.5 hours before the alert went out and 112 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 2009-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1168 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 2009-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 47 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
1168 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
848 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
47 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
May 25, 10:11 PM EDTSpecial Weather StatementTBWHillsborough49 min
May 25, 10:30 PM EDTSpecial Marine WarningTBW30 min
May 25, 10:49 PM EDTSpecial Marine WarningTBW41 min
May 25, 11:02 PM EDTSpecial Weather StatementTBWHillsborough, Pasco, Pinellas43 min
May 25, 11:09 PM EDTAreal Flood AdvisoryTBWHillsborough51 min
May 26, 1:25 PM EDTSevere Thunderstorm WarningTBWPasco35 min
May 26, 1:55 PM EDTSpecial Weather StatementTBWPasco50 min
May 26, 3:49 PM EDTSpecial Weather StatementTBWDeSoto, Hardee41 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.