Alert archive / Florida / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 91, NWS Tampa Bay, FL

July 22, 2008Highlands County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 22, 2008, 4:28 PM EDT for Highlands County, Florida. It was in force for 32 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, 4:28 PM EDT (20:28 UTC)
Expired: Jul 22, 2008, 5:00 PM EDT
In force: 32 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 20:31 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

Issued	Product	Office	Counties	Lasted
Jul 22, 11:06 AM EDT	Special Marine Warning	TBW		24 min
Jul 22, 3:00 PM EDT	Special Weather Statement	TBW	Lee	15 min
Jul 22, 3:45 PM EDT	Severe Thunderstorm Warning	TBW	Polk	30 min
Jul 22, 4:55 PM EDT	Areal Flood Advisory	TBW	Highlands	95 min
Jul 22, 4:59 PM EDT	Areal Flood Advisory	TBW	Pinellas	91 min
Jul 22, 5:00 PM EDT	Severe Thunderstorm Warning	TBW	Highlands	45 min
Jul 22, 5:07 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pinellas	38 min
Jul 22, 5:08 PM EDT	Special Marine Warning	TBW		52 min
Jul 22, 7:24 PM EDT	Areal Flood Advisory	TBW	Citrus	66 min

Nearby

Severe Thunderstorm Warnings in Florida, 2008 Every 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.