Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 59, NWS Tampa Bay, FL

May 10, 1999Pasco County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at May 10, 1999, 3:27 PM EDT for Pasco County, Florida. It was in force for 63 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 10, 1999, 3:27 PM EDT (19:27 UTC)
Expired
May 10, 1999, 4:30 PM EDT
In force
63 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Pasco County, FL

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 7.5 hours before the alert went out and 254 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, Jacksonville, FL at 12:00Z on 1999-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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, Jacksonville, FL at 12:00Z on 1999-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2026 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

The office that day

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

IssuedProductOfficeCountiesLasted
May 9, 8:14 PM EDTSevere Thunderstorm WarningTBWCharlotte46 min
May 10, 2:44 PM EDTSevere Thunderstorm WarningTBWPasco46 min
May 10, 2:52 PM EDTSevere Thunderstorm WarningTBWHillsborough48 min
May 10, 3:47 PM EDTSevere Thunderstorm WarningTBWHillsborough63 min
May 10, 4:21 PM EDTSevere Thunderstorm WarningTBWLee64 min
May 10, 4:39 PM EDTSevere Thunderstorm WarningTBWManatee61 min
May 10, 4:41 PM EDTSevere Thunderstorm WarningTBWCitrus64 min
May 10, 4:49 PM EDTSevere Thunderstorm WarningTBWCharlotte61 min
May 10, 4:52 PM EDTSevere Thunderstorm WarningTBWHighlands58 min
May 10, 5:21 PM EDTSevere Thunderstorm WarningTBWLee64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999

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.