Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 36, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jul 24, 1990, 3:00 PM EDT for Seminole County, Florida. It was in force for 30 min.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1990, 3:00 PM EDT (19:00 UTC)
- Expired
- Jul 24, 1990, 3:30 PM EDT
- In force
- 30 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Seminole County, FL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 12:00Z, 7.0 hours before the alert went out and 77 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
- 3557 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 710 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KMLB 241901 SVRMLB FLC117-241930- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 300 PM EDT TUE JUL 24 1990 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 330 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN CENTRAL FLORIDA ...SEMINOLE COUNTY ...SEVERE THUNDERSTORM WEST OF SANFORD... AT 255 PM EDT RADAR INDICATED A SEVERE THUNDERSTORM OVER SEMINOLE COUNTY WEST OF SANFORD MOVING SLOWLY SOUTHEAST TOWARD LONGWOOD. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 58 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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, Jul 24, 2:26 PM EDT, 34 minutes before
FLZ012-222300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTONA BEACH FL 225 PM EDT TUE JUL 24 1990 AT 220 PM EDT THE NATIONAL WEATHER SERVICE RADAR AT DAYTONA BEACH SHOWED A LINE OF STRONG THUNDERSTORMS FROM FLAGLER COUNTY SOUTHEAST TO VOLUSIA AND NORTHERN BREVARD COUNTY. THE LINE WAS MOVING SLOWLY SOUTH. THESE THUNDERSTORMS COULD CAUSE STRONG SURFACE WINDS...FREQUENT DANGEROUS CLOUD TO GROUND LIGHTNING AND VERY HEAVY RAINFALL CAUSING FLOODING IN AREAS THAT USUALLY FLOOD IN HEAVY RAIN. RESIDENTS OF SOUTH FLAGLER..VOLUSIA AND NORTH BREVARD COUNTIES SHOULD BE ALERT FOR ADVERSE WEATHER CONDITIONS AND TAKE SHELTER IF CONDITIONS BECOME THREATENING.
Special weather statement, Jul 24, 2:59 PM EDT, 1 minute before
FLZ011-012-016-017-242045- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 250 PM EDT TUE JUL 24 1990 AT 245 PM STRONG THUNDERSTORMS WITH HEAVY RAIN... GUSTY WINDS AND LIGHTNING WERE FROM FLAGLER BEACH TO DAYTONA BEACH AND THEN SOUTH TO NEAR COCOA. OTHER STORNG THUNDERSTORMS WERE SCATTERED FROM ASTOR PARK TO SANFORD. ALSO AT THIS TIME AN ISOLATED THUNDERSTORM WAS DEVELOPING ALONG THE BREVARD- OSCEOLA COUNTY LINE AROUND 15 MILES SOUTHWEST OF MELBOURNE. BETWEEN 145 AND 345 PM... STRONG THUNDERSTORMS WILL PERSIST AND CONTINUE REDEVELOPING ALONG THE SEA BREEZE BOUNDARY AROUND 5 TO 15 MILES INLAND FROM THE COAST ALONG ITS ENTIRE LENGTH IN EAST CENTRAL FLORIDA. NORTHERN SEMINOLE COUNTY AND THE GREATER SANFORD WILL ALSO EXPERIENCE DETERIORATING WEATHER CONDITIONS. AREAS AFFECTED BY THESE STORMS CAN EXPECT REDUCED VISIBILITIES AND PONDING OF WATER ON ROADWAYS DUE TO HEAVY RAIN. GUSTY WINDS AND FREQUENT LIGHTNING WILL ALSO OCCUR WITH THESE STORMS. ACROSS INTERIOR SECTIONS BETWEEN 250 AND 450 PM SHOWERS AND THUNDERSTORMS
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 8:06 PM EDT | Tornado Warning | MLB | Okeechobee | 54 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990
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.