Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 94, NWS Melbourne, FL

August 4, 1992Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 4, 1992, 4:12 PM EDT for Orange County, Florida. It was in force for 43 min.

The area

The counties it named.

The facts

Issued
Aug 4, 1992, 4:12 PM EDT (20:12 UTC)
Expired
Aug 4, 1992, 4:55 PM EDT
In force
43 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Orange County, FL

The radar

The Melbourne radar (KMLB), 79 km from the middle of the area, began a volume at 20:13 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.2 hours before the alert went out and 139 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 1992-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1992-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
19 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMLB 042013
SVRMLB
FLC095-042115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
412 PM EDT TUE AUG 4 1992
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  515 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL FLORIDA
 
   ...ORANGE COUNTY
 
AT 410 PM EDT...WEATHER RADAR INDICATED A SEVERE THUNDERSTORM OVER THE
EAST SIDE OF METRO ORLANDO MOVING EAST AT 5 TO 10 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 A STRONG BUILDING. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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 4, 11:15 AM EDT, 4 hours 57 minutes before
FLZ009-041715-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
1115 AM EDT TUE AUG 4 1992

...THIS STATEMENT IS FOR MARION COUNTY...

STRONG THUNDERSTORMS HAVE MOVED INTO THE WEST PART OF MARION
COUNTY AND WERE BETWEEN DUNNELLON AND OCALA.

THESE THUNDERSTORM WILL LIKELY PRODUCE STRONG AND GUSTY WINDS...
DANGEROUS LIGHTNING AND VERY HEAVY DOWNPOURS AND THEY PUSH
EASTWARD THROUGH THE COUNTY DURING THE LATE MORNING AND EARLY
AFTERNOON.

THE SAFEST PLACE DURING A THUNDERSTORM IS INSIDE AND AWAY FROM
WINDOWS AND DOORS.  MOTORISTS SHOULD EXERCISE CAUTION DURING THE
HEAVY DOWNPOURS AND WATCH FOR PONDING OF WATER ON THE ROADWAY.
Special weather statement, Aug 4, 2:20 PM EDT, 1 hour 52 minutes before
FLZ012-042015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
220 PM EDT TUE AUG 4 1992

...THIS STATEMENT CONCERNS VOLUSIA COUNTY...

STRONG THUNDERSTORMS HAVE DEVELOPED ALONG THE SEA BREEZE LINE
JUST INLAND FROM THE COAST AROUND THE DAYTONA BEACH AREA.

THESE THUNDERSTORMS WILL LIKELY PRODUCE STRONG AND GUSTY WINDS...
DANGEROUS LIGHTNING AND VERY HEAVY DOWNPOURS THIS AFTERNOON AS
THEY MOVE SLOWLY THROUGH THE AREA.

WIND GUSTS TO 30 MPH HAVE BEEN RECORDED AT THE NATIONAL WEATHER
SERVICE OFFICE IN THESE THUNDERSTORMS.

THE SAFEST PLACE DURING A THUNDERSTORM IS INSIDE AND AWAY FROM
WINDOWS AND DOORS.  MOTORISTS ARE ADVISED TO EXERCISE CAUTION
THIS AFTERNOON AS| THE HEAVY DOWNPOURS CAN CAUSE PONDING OF
WATER ON THE ROADWAYS.
Special weather statement, Aug 4, 3:02 PM EDT, 1 hour 10 minutes before
FLZ012-042000-
SPECIAL WEATHER AND MARINE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
300 PM EDT TUE AUG 4 1992

...THIS STATEMENT CONCERNS VOLUSIA COUNTY...

STRONG THUNDERSTORMS CONTINUED ALONG THE FLORIDA EAST COAST IN
THE DAYTONA BEACH AREA.

THESE THUNDERSTORMS WILL LIKELY PRODUCE STRONG AND GUSTY WINDS...
DANGEROUS LIGHTNING AND VERY HEAVY DOWNPOURS THIS AFTERNOON AS
THEY MOVE EAST THROUGH THE AREA AND OUT OVER THE COASTAL WATERS.

WIND GUSTS TO 31 MPH HAVE BEEN RECORDED AT THE NATIONAL WEATHER
SERVICE OFFICE IN THESE THUNDERSTORMS...ALONG WITH OVER THREE-
QUARTERS /.82/ OF AN INCH OF RAIN IN LESS THAN ONE HOUR.

THE SAFEST PLACE DURING A THUNDERSTORM IS INSIDE AND AWAY FROM
WINDOWS AND DOORS.  MOTORISTS ARE ADVISED TO EXERCISE CAUTION
THIS AFTERNOON AS THE HEAVY DOWNPOURS CAN CAUSE PONDING OF
WATER ON THE ROADWAYS.  SOME FLODDING OF LOW LYING AREAS CAN
BE EXPECTED THIS AFTERNOON WITH THESE THUNDERSTORMS.

BOATERS ON THE INLAND WATERWAYS AND ON THE COASTAL WATERS OFFSHORE
DAYTONA BEACH SHOULD BE ESPECIALLY ALERT FOR THE THUNDERSTORMS AS
THEY MOVE OVER THE COASTAL WATERS.
Special weather statement, Aug 4, 3:42 PM EDT, 30 minutes before
FLZ017-011-016-042045-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
340 PM EDT TUE AUG 4 1992

...STRONG THUNDERSTORMS FORM ONCE AGAIN IN THE AFTERNOON HEAT...

AT 335 PM EDT...WEATHER RADAR INDICATED STRONG THUNDERSTORMS OVER EAST
CENTRAL FLORIDA FROM VERO BEACH TO YEEHAW JUNCTION...ALONG I-4 THROUGH
ORANGE COUNTY...AND NEAR DAYTONA BEACH.

SOME OF THESE STORMS WILL PRODUCE LOCALLY HEAVY RAIN AND GUSTY WINDS.

ELSEWHERE...SHOWERS AND THUNDERSTORMS WERE FROM GAINESVILLE AND ST
AUGUSTINE...TO LAKE GEORGE AND DELAND...TO WINTER GARDEN AND
SANFORD...TO LAKE KISSIMMEE.

THESE SHOWERS AND THUNDERSTORMS WERE GENERALLY MOVING EAST AT 5 TO
10 MPH.

THROUGH 5PM EDT...SHOWERS AND A FEW STRONG THUNDERSTORMS WILL BE
PASSING THROUGH THE ORLANDO METRO AREA. MOTORISTS SHOULD DRIVE WITH
EXTRA CAUTION. THUNDERSTORMS WILL BECOME STRONG OVER PARTS OF INDIAN
RIVER COUNTY...NEAR KISSIMMEE...AND AROUND LONGWOOD AND OVIEDO.

WHEN THUNDERSTORMS ARE OCCURRING...MOVE FOR SAFE SHELTER. IF CAUGHT
OUTSIDE...DO NOT STAND UNDER A TALL ISOLATED TREE. MARINE INTERESTS
SHOULD BE ON THE ALERT FROM CAPE CANAVERAL NORTH TO ST AUGUSTINE...AND
FROM SEBASTIAN INLET RSOUTH.

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 4, 4:31 PM EDTSevere Thunderstorm WarningMLBBrevard44 min
Aug 4, 5:14 PM EDTSevere Thunderstorm WarningMLBPalm Beach46 min

Nearby

Severe Thunderstorm Warnings in Florida, 1992Every severe thunderstorm warning in 1992

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; radar from the NEXRAD Level II archive.