Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 11, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Aug 3, 1990, 6:47 PM EDT for Hendry County, Florida. It was in force for 28 min.
The area
The counties it named.
The facts
- Issued
- Aug 3, 1990, 6:47 PM EDT (22:47 UTC)
- Expired
- Aug 3, 1990, 7:15 PM EDT
- In force
- 28 min
- Issued by
- NWS Miami, FL
- Area
- Whole counties
County Hendry 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
Tampa Bay, FL (KTBW), launched 12:00Z, 10.8 hours before the alert went out and 177 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 15 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 KMIA 032249 SVRMIA FLC051-032315- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MIAMI FL 647 PM EDT FRI AUG 3 1990 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN SOUTH FLORIDA ...NORTHERN HENDRY COUNTY AT 647 PM EDT...MIAMI RADAR DETECTED A SEVERE THUNDERSTORM OVER LA BELLE IN NORTHERN HENDRY COUNTY. THIS THUNDERSTORM IS DRIFTING VERY SLOWLY TOWARD THE SOUTH. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USEF TELEPHONES OR ELECTRICAL APPLIANCES. A MOBILE HOME IS NOT A SAFE REFUGE FROM A SEVERE THUNDERSTORM...MOVE TO A MORE SUBSTANTIAL BUILDING.
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, Aug 3, 2:44 PM EDT, 4 hours 3 minutes before
FLZ015>023-031930- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 231 PM EDT FRI AUG 03 1990 AT 230 PM RADAR INDICATED THAT NUMEROUS SHOWERS AND THUNDERSTORMS CONTINUED TO RAPIDLY DEVELOP OVER MUCH OF THE SOUTHERN PENINUSLA FROM MARTIN COUNTY TO THE EVERGLADES NATIONAL PARK. THE STRONGEST OF THESE THUNDERSTORMS WILL LIKELY BE ATTENDED BY STRONG AND GUSTY WINDS...RAINFALL RATES IN EXCESS OF TWO INCHES AN HOUR...FREQUENT LIGHTNING...AND POSSIBLY SOME SMALL HAIL. THESE SHOWERS AND THUNDERSTORMS SHOWED LITTLE MOVEMENT DURING THE PAST HOUR ...HOWEVER....THEY WERE DEVELOPING IN A EASTWARD DIRECTION. ELSEWHERE....WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH VERY HEAVY RAINFALL...CONTINUED THROUGH OUT THE NORTHERN AND WESTERN BAHAMAS ...LOWER KEYS...AND CAY SAL BANK. THE MAXIMUM PRECIPITATION TOPS OBSERVED WERE 54 THOUSAND FEET IN CENTRAL BROWARD COUNTY AND IN EXCESS OF 48 THOUSAND FEET IN CENTRALa DADE COUNTY.
Special weather statement, Aug 3, 3:30 PM EDT, 3 hours 17 minutes before
FLZ015>023-032030- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 325 PM EDT FRI AUG 03 1990 AT 325 PM RADAR INDICATED THAT NUMEROUS SHOWERS AND THUNDERSTORMS CONTINUED TO RAPIDLY DEVELOP OVER MUCH OF THE SOUTHERN PENINUSLA FROM MARTIN COUNTY TO THE EVERGLADES NATIONAL PARK. THE STRONGEST OF THESE THUNDERSTORMS WILL LIKELY BE ATTENDED BY STRONG AND GUSTY WINDS...RAINFALL RATES IN EXCESS OF TWO INCHES AN HOUR...FREQUENT LIGHTNING...AND POSSIBLY SOME SMALL HAIL. THESE SHOWERS AND THUNDERSTORMS SHOWED LITTLE MOVEMENT DURING THE PAST HOUR ...HOWEVER....THEY WERE DEVELOPING IN A EASTWARD DIRECTION. ELSEWHERE....WIDELY SCATTERED SHOWERS AND THUNDERSTORMS...A FEW WITH VERY HEAVY RAINFALL...CONTINUED THROUGH OUT THE NORTHERN AND WESTERN BAHAMAS ...LOWER KEYS...AND CAY SAL BANK. THE MAXIMUM PRECIPITATION TOPS OBSERVED WERE 56 THOUSAND FEET JUST SOUTHWEST OF WEST PALM BEACH AND IN SOUTH CENTRAL BROWARD COUNTY.
Special weather statement, Aug 3, 4:08 PM EDT, 2 hours 39 minutes before
FLZ020-020-032215- SPECIAL WEATHER STATEMENT AND MARINE WEATHER STATEMENT NATIONAL WEATHER SERVICE WEST PALM BEACH FL 408 PM EDT FRI AUG 3 1990 AT 400 PM EDT A BAND OF STRONG THUNDERSTORMS EXTENDED ALONG AND 15 MILES INLAND FROM THE COAST BETWEEN JUPITER AND FORT PIERCE. THEY WERE DRIFTING SLOWLY TO THE EAST TOWARD THE COAST AND HUTCHINSON ISLAND. THE STRONGEST THUNDERSTORM WITHIN THE BAND WAS BETWEEN STUART AND FORT PIERCE. BRIEF HEAVY RAINFALL INTENSE CLOUD TO GROUND LIGHTNING AND GUSTY WINDS WILL ACCOMPANY THESE THUNDERSTORMS AS THEY CONTINUE MOVING EAST THE NEXT HOUR OR TWO. BOATERS ALONG THE COAST CAN EXPECT NEAR ZERO VISIBILITY IN HEAVY RAIN AND ROUGH SEAS AS THESE THUNDERSTORMS MOVE TO THE COASTAL WATERS. NNNN
Special weather statement, Aug 3, 4:40 PM EDT, 2 hours 7 minutes before
FLZ015>023-032135- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 440 PM EDT FRI AUG 03 1990 AT 430 PM RADAR INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS...MANY WITH VERY HEAVY RAINFALL...CONTINUING TO BLANKET MOST OF THE SOUTHERN PENINUSLA SOUTH OF A FORT MYERS/VERO BEACH LINE. THESE SHOWERS AND THUNDERSTORMS EXTENDED ALONG THE IMMEDIATE COASTAL WATERS...OVER THE ATLANTIC TO THE NORTHERN AND WESTERN BAHAMAS AND FROM THE LOWER KEYS OVER THE FLORIDA STRAITS TO THE CAY SAL BANK. MOTORISTS...BOATERS AND OTHER CONCERNED INTERESTS SHOULD BE ALERT FOR THESE THUNDERSTORMS AS THEY WILL BE ACCOMPANIED BY FREQUENT DANGEROUS LIGHTNING STRIKES...SHARPLY REDUCE VISIBILITIES IN PERIODS OF VERY HEAVY RAINS...HAVE LOCALLY STRONG GUSTY WINDS WHICH COULD CREATE ROUGH AND CONFUSED SEAS...AND CAUSE POOLING OF WATER ON LOW LYING POOR DRAINAGE ROADWAYS. THERE IS ALSO A POSSIBILITY OF SMALL HAIL WITH THE MORE INTENSE THUNDERSTORMS. THUNDERSTORM MOVEMENT WAS SLOWLY SOUTH 5 MILES AN HOUR. THE MAXIMUM PRECIPITATION TOP WAS 58 THOUSAND FEET OVER THE KENDALL AREA OF SOUTHWEST DADE COUNTY.
Special weather statement, Aug 3, 5:41 PM EDT, 1 hour 6 minutes before
FLZ015>023-032235- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 545 PM EDT FRI AUG 03 1990 AT 534 PM RADAR INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS...MANY WITH VERY HEAVY RAINFALL...CONTINUING TO BLANKET MOST OF THE SOUTHERN PENINUSLA SOUTH OF A FORT MYERS/VERO BEACH LINE. THESE SHOWERS AND THUNDERSTORMS EXTENDED ALONG THE IMMEDIATE COASTAL WATERS...OVER THE ATLANTIC TO THE NORTHERN AND WESTERN BAHAMAS AND OVER THE FLORIDA STRAITS TO THE CAY SAL BANK. MOTORISTS...BOATERS AND OTHER CONCERNED INTERESTS SHOULD BE ALERT FOR THESE THUNDERSTORMS AS THEY WILL BE ACCOMPANIED BY FREQUENT DANGEROUS LIGHTNING STRIKES...SHARPLY REDUCE VISIBILITIES IN PERIODS OF VERY HEAVY RAINS...HAVE LOCALLY STRONG GUSTY WINDS WHICH COULD CREATE ROUGH AND CONFUSED SEAS...AND CAUSE POOLING OF WATER ON LOW LYING POOR DRAINAGE ROADWAYS. THERE IS ALSO A POSSIBILITY OF SMALL HAIL WITH THE MORE INTENSE THUNDERSTORMS. THUNDERSTORM MOVEMENT WAS SLOWLY SOUTHEAST 5 MILES AN HOUR. THE MAXIMUM PRECIPITATION TOP WAS 48 THOUSAND FEET OVER WESTERN PALM BEACH COUNTY SOUTH OF LAKE OKEECHOBEE.
Special weather statement, Aug 3, 6:40 PM EDT, 7 minutes before
FLZ015>023-032335- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE MIAMI FL 645 PM EDT FRI AUG 03 1990 AT 635 PM RADAR INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS...MANY WITH VERY HEAVY RAINFALL...CONTINUING TO BLANKET MOST OF THE SOUTHERN PENINUSLA SOUTH OF A FORT MYERS/VERO BEACH LINE. THESE SHOWERS AND THUNDERSTORMS EXTENDED ALONG THE IMMEDIATE COASTAL WATERS...OVER THE ATLANTIC TO THE NORTHERN AND WESTERN BAHAMAS AND OVER THE FLORIDA STRAITS TO THE CAY SAL BANK. MOTORISTS...BOATERS AND OTHER CONCERNED INTERESTS SHOULD BE ALERT FOR THESE THUNDERSTORMS AS THEY WILL BE ACCOMPANIED BY FREQUENT DANGEROUS LIGHTNING STRIKES...SHARPLY REDUCE VISIBILITIES IN PERIODS OF VERY HEAVY RAINS...HAVE LOCALLY STRONG GUSTY WINDS WHICH COULD CREATE ROUGH AND CONFUSED SEAS...AND CAUSE POOLING OF WATER ON LOW LYING POOR DRAINAGE ROADWAYS. THERE IS ALSO A POSSIBILITY OF SMALL HAIL WITH THE MORE INTENSE THUNDERSTORMS. LITTLE THUND9ERSTORM MOVEMENT WAS NOTED. THE MAXIMUM PRECIPITATION TOP WAS 55 THOUSAND FEET OVER LABELLE IN NORTHERN GLADES COUNTY.
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.