Alert archive / Florida / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 15, NWS Melbourne, FL

April 25, 1991Alachua County, Marion County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 25, 1991, 12:12 PM EDT for Alachua County, Marion County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Apr 25, 1991, 12:12 PM EDT (16:12 UTC)
Expired
Apr 25, 1991, 1:15 PM EDT
In force
63 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Alachua County, FL, Marion County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 4.2 hours before the alert went out and 194 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 1991-04-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 924 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 1991-04-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.193958Sfc1 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
924 J/kg
Mixed-layer CIN
-92 J/kg
Mixed-layer LCL
843 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
103 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

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 Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 25, 4:43 PM EDTTornado WarningMLBOsceola62 min
Apr 25, 5:41 PM EDTSevere Thunderstorm WarningMLBBrevard, Indian River64 min

Nearby

Severe Thunderstorm Warnings in Florida, 1991Every severe thunderstorm warning in 1991

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.