Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 90, NWS Tampa Bay, FL

July 22, 2008Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 22, 2008, 3:45 PM EDT for Polk 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
Jul 22, 2008, 3:45 PM EDT (19:45 UTC)
Expired
Jul 22, 2008, 4:15 PM EDT
In force
30 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon

County Polk County, FL

The radar

The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 19:48 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, 7.8 hours before the alert went out and 74 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 2008-07-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1831 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 2008-07-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
1831 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
896 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
6 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
Jul 22, 11:06 AM EDTSpecial Marine WarningTBW24 min
Jul 22, 3:00 PM EDTSpecial Weather StatementTBWLee15 min
Jul 22, 4:28 PM EDTSevere Thunderstorm WarningTBWHighlands32 min
Jul 22, 4:55 PM EDTAreal Flood AdvisoryTBWHighlands95 min
Jul 22, 4:59 PM EDTAreal Flood AdvisoryTBWPinellas91 min
Jul 22, 5:00 PM EDTSevere Thunderstorm WarningTBWHighlands45 min
Jul 22, 5:07 PM EDTSevere Thunderstorm WarningTBWHillsborough, Pinellas38 min
Jul 22, 5:08 PM EDTSpecial Marine WarningTBW52 min
Jul 22, 7:24 PM EDTAreal Flood AdvisoryTBWCitrus66 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.