Alert archive / Florida / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 12, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 23, 1991, 12:24 PM EDT for Lake County, Florida. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Apr 23, 1991, 12:24 PM EDT (16:24 UTC)
- Expired
- Apr 23, 1991, 1:30 PM EDT
- In force
- 66 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Lake County, FL
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 4.4 hours before the alert went out and 123 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.
- Mixed-layer CAPE
- 281 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 734 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Apr 23, 9:11 AM EDT, 3 hours 13 minutes before
FLZ012-231430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTONA BEACH FL 910 AM EDT TUE APR 23 1991 VERY STRONG THUNDERSTORMS WERE CLUSTERED IN PUTNAM COUNTY AND MOVING VERY RAPIDLY TOWARD THE NORTHWEST AND NORTH HALF OF FLAGLER. COUNTY AND WILL ENTER FLAGLER COUNTY DURING THE NEXT 30 MINUTES. THESE VERY STRONG THUNDERSTORMS WERE MOVING EAST AND A LITTLE SOUTH OF EAST AT 40 MPH AND ARE CAPABLE OF PRDUCING VERY STRONG AND GUSTY WIND...VERY HEAVY DOWNPOURS...FREQUENT DEADLY LIGHTNING STRIKES AND HAIL. RESIDENTS OF FLAGLER COUNTY...ESPECIALLY...THE NORTH HALF SHOULD PREPARE FOR THESE STRONG STORMS AS THEY CROSS THE COUNTY DURING THE NEXT 1 TO 2 HOURS. MARINE OPERATORS SHOULD SEEK SAFE HARBOR. WARNINGS ARE LIKEY WITH THESE STORMS DURING THIS HOUR.
Special weather statement, Apr 23, 10:32 AM EDT, 1 hour 52 minutes before
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</html>The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:28 AM EDT | Severe Thunderstorm Warning | MLB | Flagler | 62 min |
| Apr 23, 9:57 AM EDT | Tornado Warning | MLB | Flagler | 48 min |
| Apr 23, 4:01 PM EDT | Severe Thunderstorm Warning | MLB | Brevard | 29 min |
| Apr 23, 4:31 PM EDT | Severe Thunderstorm Warning | MLB | Brevard | 29 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.