Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 46, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 11, 1990, 4:30 PM EDT for Brevard County, Florida. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Aug 11, 1990, 4:30 PM EDT (20:30 UTC)
- Expired
- Aug 11, 1990, 5:30 PM EDT
- In force
- 60 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Brevard 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, 8.5 hours before the alert went out and 27 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
- 1272 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1058 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 16 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 112030 SVRMLB FLC009-112130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 430 PM EDT SAT AUG 11 1990 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 530 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL FLORIDA ...BREVARD COUNTY AND FOR MARINE INTERESTS ON THE COASTAL WATERS FROM... ...MOSQUITO LAGOON TO SEBASTIAN INLET AT 428 PM NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF POSSIBLE SEVERE THUNDERSTORMS EXTENDING FROM OAK HILL TO 5 MILES WEST OF MELBOURNE. MOVEMENT WAS TO THE EAST AT 15 MPH. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. BOATERS AND MARINERS IN THE PATH OF THIS STORM SHOULD TAKE NECESSARY PRECAUTIONS. SEEK SAFE HARBOR IMMEDIATELY IF POSSIBLE.
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 11, 12:52 PM EDT, 3 hours 38 minutes before
FLZ006>017-020-111840 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 1250 PM EDT SAT AUG 11 1990 ...THIS STATEMENT IS FOR PERSONS IN THE EAST HALF OF MARION AND THE WESTERN SECTIONS OF FLAGLER AND VOLUSIA COUNTIES... AT 1228 PM A LINE OF THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS... FREQUENT DANGEROUS LIGHTNING STRIKES...POSSIBLY SMALL HAIL...AND VERY HEAVY RAINS CONTINUED TO DEVELOP OVER THE INTERIOR OF THE STATE. THE LINE EXTENDED FROM 10 MILES NORTHWEST OF PALATKA TO AROUND TAMPA. SOME OF THE HEAVIEST SHOWERS WERE OCCURRING OVER THE EAST HALF OF MARION COUNTY AROUND THE OKLAWAHA RIVER. THE LINE OF THUNDERSTORMS WAS MOVING SLOWLY EAST AND WILL LIKELY AFFECT THE WESTERN SECTIONS...AROUND THE ST JOHNS RIVER...OF FLAGLER AND VOLUSIA COUNTIES WITHIN AN HOUR. SHOULD THESE THUNDERSTORMS CONTINUE PROGRESSING EASTWARD... FURTHER STATEMENTS WILL BE ISSUED FOR THE COASTAL AREAS. RESIDENTS ARE ADVISED TO BE PREPARED FOR THE APPROACH OF THESE THUNDERSTORMS AND TO SEEK SAFE SHELTER IMMEDIATELY WHEN THEY ARE SIGHTED.
Special weather statement, Aug 11, 1:18 PM EDT, 3 hours 12 minutes before
FLZ011-111830- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 115 PM EDT SAT AUG 11 1990 ...STRONG THUNDERSTORMS MOVING INTO LAKE COUNTY... AT 110 PM EDT A LINE OF STRONG THUNDERSTORMS WAS MOVING INTO NORTHERN AND CENTRAL LAKE COUNTY. EARLIER THIS AFTERNOON THIS LINE OF STORMS PRODUCED STRONG GUSTY WINDS AND HEAVY RAIN OVER MARION COUNTY. AT 115 PM THIS LINE WAS MOVING EAST AT 10 MPH AND IT WILL MOVE ACROSS NORTHERN LAKE COUNTY BETWEEN 115 AND 230 PM. THE COMMUNITIES OF MT DORA... LEESBURG AND CLERMONT SHOULD BE ADVISED THAT THESE STORMS MAY PRODUCE STRONG GUSTY WINDS... POSSIBLE SMALL HAIL AND HEAVY RAIN. NUMEROUS CLOUD TO GROUND LIGHTNING STROKES WIL#L ALSO OCCUR IN THIS SITUATION. MOVEMENT WAS EAST 15 MPH.
Special weather statement, Aug 11, 1:45 PM EDT, 2 hours 45 minutes before
FLZ006>017-020-111840 SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 140 PM EDT SAT AUG 11 1990 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM FOR EASTERN MARION COUNTY AND NORTHWEST VOLUSIA COUNTY... AT 131 PM A NEARLY SOLID BAND OF THUNDERSTORMS WITH VERY HEAVY RAINS...ABOUT 30 MILES WIDE...EXTENDED FROM JUST WEST OF ST AUGUSTINE ACROSS LAKE GEORGE AND CONTINUED SOUTH TO NEAR LAKELAND. THE THUNDERSTORMS WERE MOVING EAST AT AROUND 15 MPH. THE THUNDERSTORMS OVER NORTHWEST VOLUSIA AND EASTERN MARION COUNTY REMAIN DANGEROUS...CAPABLE OF PRODUCING WIND GUSTS IN EXCESS OF 50 MPH AND LARGE HAIL. THESE THUNDERSTORMS WILL ALSO PRODUCE F:REQUENT DANGEROUS LIGHTNING STRIKES AND VERY HEAVY RAINFALL AMOUNTS. RESIDENTS ARE ADVISED TO BE PREPARED FOR THE APPROACH OF THESE THUNDERSTORMS AND TO SEEK SAFE SHELTER IMMEDIATELY WHEN THEY ARE SIGHTED.
Special weather statement, Aug 11, 1:45 PM EDT, 2 hours 45 minutes before
FLZ011-016-017-111945- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 145 PM EDT SAT AUG 11 1990 ...STRONG THUNDERSTORMS MOVING TOWARDS METRO ORLANDO... AT 140 PM A BROKEN LINE OF SHOWERS AND THUNDERSTORMS EXTENDED FROM PALATKA TO ASTOR PARK... TO JUST NORTH OF LEESBURG AND THEN TO NEAR MASCOTTE. SOME OF THE THUNDERSTORMS CONTAIN GUSTY WINDS AND HEAVY RAIN. AT THIS TIME THE STRONGEST STORMS WERE NEAR ASTOR PARK9 AND MASCOTTE. BETWEEN 145 AM AND 345 PM SHOWERS AND THUNDERSTORMS WILL MOVE ACROSS LAKE COUNTY AND INTO SEMINOLE AND ORANGE COUNTIES. THESE STORMS WILL MOVE INTO WESTERN ORANGE COUNTY BY 230 PM AND REACH METRO ORLANDO BY 300 PM.
Special weather statement, Aug 11, 2:10 PM EDT, 2 hours 20 minutes before
FLZ012-111940 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTONA BEACH FL 210 PM EDT SAT AUG 11 1990 ...THIS IS A SPECIAL WEATHER STATEMENT FOR FLAGLER AND NORTHERN VOLUSIA COUNTIES AND THEIR ADJACENT COASTAL WATERS... AT 205 PM STRONG THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS... FREQUENT DANGEROUS LIGHTNING STRIKES...POSSIBLY SMALL HAIL...AND VERY HEAVY RAIN EXTENDED FROM THE NORTHWEST CORNER OF FLAGLER COUNTY INTO NORTHWEST VOLUSIA NEAR DELAND. THE THUNDERSTORMS WERE MOVING EAST AT AROUND 10 MPH AND WILL LIKELY REMAIN DANGEROUS AS THEY MOVE TO THE ADJACENT COASTAL WATERS. RESIDENTS AND ARE ADVISED TO BE PREPARED FOR THE APPROACH OF THESE THUNDERSTORMS AND TO SEETK SAFE SHELTER IMMEDIATELY WHEN THEY ARE SIGHTED. BOATERS TOO...SHOULD BE PREPARED TO SEEK SAFE HARBOR.
Special weather statement, Aug 11, 3:53 PM EDT, 37 minutes before
FLZ017-011-016-012-112200- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 353 PM EDT SAT AUG 11 1990 ....SEVERE THUNDERSTORM WARNING CONTINUES IN EFFECT FOR NORTHERN OSCEOLA COUNTY UNTIL 4 PM... A LINE OF STRONG THUNDERSTORMS EXTENDED FROM LAKE KISSIMMEE NORTHEAST TO JUST EAST OF ORLANDO TO OAK HILL. THIS LINE EXTENDED OFFSHORE OF THE COASTAL WATERS OF NEW SMYRNA BEACH. THESE THUNDERSTORMS WERE MOVING TOWARD THE EAST AT 25 MPH. THESE THUNDERSTORMS WILL LIKELY PRODUCE STRONG WIND GUSTS...VERY HEAVY RAIN...FREQUENT LIGHTNING STRIKES AND POSSIBLY SMALL HAIL. THIS LINE WILL BE MOVING INTO NORTHERN AND CENTRAL BREVARD COUNTY WITHIN THE HOUR.
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 3:15 PM EDT | Severe Thunderstorm Warning | MLB | Osceola | 45 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.