Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 22, NWS Melbourne, FL

March 6, 1992Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 6, 1992, 4:45 PM EST for Brevard County, Florida. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Mar 6, 1992, 4:45 PM EST (21:45 UTC)
Expired
Mar 6, 1992, 5:30 PM EST
In force
45 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 21 km from the middle of the area, began a volume at 21:46 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, 9.8 hours before the alert went out and 180 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 1992-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 466 joules per kilogram.LCLLFCEL10008507005003002001001 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 1992-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.193958Sfc1 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
466 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
737 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 062146
SVRMLB
FLC009-062230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
445 PM EST FRI MAR 6 1992
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  530 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL FLORIDA
 
   ...CENTRAL BREVARD COUNTY
 
  AND FOR MARINE INTERESTS ON THE COASTAL WATERS FROM...
 
   ...COCOA BEACH  TO  MELBOURNE BEACH
   ...MELBOURNE BEACH  TO  SEBASTIAN INLET
 
...A SEVERE THUNDERSTORMS WAS FORMING IN THE VICINITY OF MELBOURNE...
 
AT 445 PM EST...RADAR INDICATED A SEVERE THUNDERSTORM FORMING OVER THE
CITY OF MELBOURNE MOVING EAST AT 20 MPH. THIS STORM WILL BE MOVING OUT
OVER THE COASTAL WATERS WITHIN 20 MINUTES.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOURU 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, Mar 6, 3:49 PM EST, 56 minutes before
FLZ017-062145-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
348 PM EST FRI MAR 6 1992

...STRONG THUNDERSTORMS APPOACHING EAST COAST...

AT 345 PM WEATHER SERVICE RADAR SHOWED A CLUSTER OF STRONG
THUNDERSTORMS EXTENDING FROM TITUSVILLE TO ABOUT 10 MILES WEST OF
MELBOURNE. THE THUNDERSTORMS WERE MOVING TO THE NORTHEAST AT 15 MPH
AND WILL BE MOVING TO THE EAST COAST WITHIN THE NEXT HOUR. IN
ADDITION TO VERY HEAVY DOWNPOURS THE THUNDERSTORMS MAY PRODUCE
DANGEROUS LIGHTNING AND WIND GUSTS OF OVER 30 MPH AS THEY PASS.

RESIDENTS IN THESE AREAS SHOULD BE ALERT FOR THE THUNDERSTORMS
AND USE EXTRA CAUTION WHEN DRIVING LATE THIS AFTERNOON.

ELSEWHERE IN EAST CENTRAL FLORIDA...STRONG THUNDERSTORMS WERE
ALONG THE COAST BETWEEN FLAGLER BEACH AND NEW SMYRNA BEACH
AND FROM LAKE GEORGE AND EUSTIS TO WEST OF OCALA. SCATTERED
SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER EAST CENTRAL
FLORIDA INTO THE EVENINtG HOURS.

PAF
Special weather statement, Mar 6, 4:21 PM EST, 24 minutes before
FLZ011-062215-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
420 PM EST FRI MAR 6 1992

...STRONG THUNDERSTORM WITH POSSIBLE HAIL NEAR TAVARES AND MT DORA IN
LAKE COUNTY...

AT 418 PM EST...WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM
IN LAKE COUNTY NEAR TAVARES AND MT DORA. THIS STORM WAS PRODUCING VERY
HEAVY RAIN AND FREQUENT LIGHTNING. IT IS ALSO VERY LIKELY THAT SOME
HAIL TO ONE-HALF INCH AND GUSTY WINDS TO 45 MPH WERE ASSOCIATED WITH
THIS STORM. THE STORM WAS MOVING NORTHEAST AT 20 MPH.

RESIDENTS ACROSS THE NORTH HALF OF LAKE COUNTY SHOULD PREPARE FOR
THREATENING WEATHER AND BE READY TO TAKE ACTION IF A WARNING IS
ISSUED. WHEN THUNDERSTORMS ARE OCCURRING...STAY INSIDE A STURDY
STRUCTURE AND AVOID WINDOWS.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 4:38 PM ESTSevere Thunderstorm WarningMLBLake52 min
Mar 6, 4:49 PM ESTSevere Thunderstorm WarningMLBOrange41 min
Mar 6, 4:54 PM ESTSevere Thunderstorm WarningMLBSeminole66 min
Mar 6, 5:32 PM ESTSevere Thunderstorm WarningMLBOrange58 min
Mar 6, 5:43 PM ESTTornado WarningMLBOrange62 min
Mar 6, 6:18 PM ESTSevere Thunderstorm WarningMLBBrevard, Indian River42 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.