Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 41, NWS Melbourne, FL

August 8, 1990Flagler County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 8, 1990, 4:12 PM EDT for Flagler County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Aug 8, 1990, 4:12 PM EDT (20:12 UTC)
Expired
Aug 8, 1990, 5:15 PM EDT
In force
63 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Flagler 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

Jacksonville, FL (KAYS), launched 12:00Z, 8.2 hours before the alert went out and 121 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, Jacksonville, FL at 12:00Z on 1990-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1066 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, Jacksonville, FL at 12:00Z on 1990-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
1066 J/kg
Mixed-layer CIN
-64 J/kg
Mixed-layer LCL
691 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
14 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 KDAB 082013
SVRDAB
FLC035-082115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
412 PM EDT WED AUG 8 1990
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  515 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST FLORIDA
 
   ...FLAGLER COUNTY AND THE ADJACENT COASTAL WATERS.
 
A SEVERE IMQ=I5WAS LOCATED 10 MILES SOUTHWEST OF BUNNELL AND
WAS MOVING NORTHEAST AT 10 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
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.
 
AS THE THUNDERSTORMS MOVE OUT OVER THE COASTAL WATERS...BOATERS
IN THE THREATENED AREA CAN EXPECT STRONG^ WINDS...ROUGH SEAS AND
LIGHTNING. BOATERS SHOULD TAKE NECESSARY ACTION TO AVOID THE
DANGEROUS THUNDERSTORMS.

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 8, 1:37 PM EDT, 2 hours 35 minutes before
FLZ009-081845-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
136 PM EDT WED AUG 8 1990

A STRONG THUNDERSTORM HAS DEVELOPED ALONG THE VOLUSIA COUNTY COAST
JUST INLAND FROM EDGpEWATER AND OAK HILL.

THIS THUNDERSTORMS MAY BE ACCOMPANIED WITH HAIL..STRONG WINDS AND
FREQUENT LIGHTNING AS IT MOVES NORTHEAST AT 10 MPH TOWARD NEW SMYRNA
BEACH AND PONDE DE LEON INLET.
Special weather statement, Aug 8, 2:03 PM EDT, 2 hours 9 minutes before
FLZ017-011-016-012-081900-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
202 PM EDT WED AUG 8 1990

...SEVERE THUNDERSTORM WATCH NUMBER 647 REMAINS IS IN EFFECT FOR MUCH
OF CENTRAL FLORIDA UNTIL 8PM EDT...

AT 155 PM EDT NATIONAL WEATHER SERVICE RADARS INDICATED THUNDERSTORMS
FROM EDGEWATER TO OAK HILL IN VOLUSIA COUNTY...FROM SEBASTIAN TO
MELBOURNE...AND FROM BROOKSVILLE TO OCALA IN CENTRAL FLORIDA.
MOVEMENT WAS NORTHEAST AT 10 MPH.

LATEST SATELLITE AND RADAR INFORMATION HAS POINTED TO A RAPID
DEVELOPMENT OF THUNDERSTORMS OVER CENTRAL FLORIDA DURING THE PAST
HOUR. AS A RESULT A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED AND
INCLUDES FLAGLER...VOLUSIA...LAKE...SEMINOLE...ORANGE...OSCEOLA...AND
BREVARD COUNTIES AND THE ADJACENT EAST CENTRAL COASTAL WATERS. ANY
THUNDERSTORM IN OR NEAR THE WATCH AREA HAS THE POTENTIAL TO BECOME
SEVERE. THIS MEANS THAT SOME THUNDERSTORMS WILL HAVE THE CAPABILITY TO
PRODUCE WIND GUSTS TO AS MUCH AS 58 MPH AND/OR HAIL THREE QUATER INCH
IN DIAMETER. PEOPLE IN EAST CENTRAL FLORIDA NEED TO BE ALERT TO
THREATENING WEATHER TODAY AND BE READY TO TAKE ACTION IF A WARNING IS
ISSUED.

DURING THE NEXT TWO HOURS...THUNDERSTORMS WILL CONTINUE TO DEVELOP
ACROSS EAST CENTRAL FLORIDA. THE MOST FAVORED AREAS FOR STRONG
THUNDERSTORMS THIS HOUR WILL BE ALONG THE IMMEDIATE COAST...AND OVER
LAKE COUNTY.
Special weather statement, Aug 8, 2:52 PM EDT, 1 hour 20 minutes before
FLZ017-011-016-012-081945-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
251 PM EDT WED AUG 8 1990

...STRONG THUNDERSTORMS MOVING TOWARDS LAKE COUNTY...

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MUCH OF CENTRAL
FLORIDA UNTIL 8 PM EDT...

AT 245 PM EDT NATIONAL WEATHER SERVICE RADARS INDICATED A CLUSTER OF
STRONG THUNDERSTORMS IN SUMTER COUNTY. A SEVERE THUNDERSTORM WAS NOTED
IN SOUTHWEST SUMTER COUNTY AND A WARNING IS IN EFFECT FOR THIS STORM
UNTIL 315 PM EDT. MOVEMENT OF THESE THUNDERSTORMS WAS NORTHEAST AT 10
MPH. THIS MEANS THAT STRONG THUNDERSTORMS WILL BE ENTERING LAKE COUNTY
FROM THE SOUTHWEST DURING THE NEXT HOUR. RESIDENTS OF LAKE COUNTY
SHOULD BE PREPARED TO TAKE IMMEDIATE ACTION IF A WARNING IS ISSUED.

OTHER STRONG THUNDERSTORMS WERE NEAR TITUSVILLE...BETWEEN MELBOURNE
AND SEBASTIAN...AND FROM NEAR MASCOTTE TO OCALA. MOVEMENT WAS ALSO
NORTHEAST AT 10 MPH.

ANY THUNDERSTORM TODAY IN CENTRAL FLORIDA HAS THE CAPABILITY TO BECOME
SEVERE. DESTRUCTIVE HAIL AND/OR WIND GUSTS OF AT LEAST 58 MPH OCCUR
WITH SEVERE THUNDERSTORMS. ALSO...VERY HEAVY RAIN WILL LIKELY CAUSE
SOME TEMPORARY FLOODING OF SOME STREETS AND POOR DRAINAGE AREAS. SOME
STREETS IN TITUSVILLE ARE ALREADY EXPERIENCING MINOR FLOODING. DO NOT
DRIVE YOUR CAR INTO WATER THAT COVERS THE ROAD.

DURING THE NEXT HOUR...THE FAVORED AREAS FOR STRONG THUNDERSTORMS WILL
BE IN LAKE COUNTY...AND ALONG THE IMMEDIATE COAST FROM SEBASTIAN TO
NEW SMYRNA BEACH MAINLY NEAR TITUSVILLE AND SOUTH OF MELBOURNE.
Special weather statement, Aug 8, 2:54 PM EDT, 1 hour 18 minutes before
FLZ006>017-020-082000-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
250 PM EDT WED AUG 8 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF
NORTH AND CENTRAL FLORIDA UNTIL 800 PM EDT...

THIS WATCH INCLUDES THE FOLLOWING COUNTIES...MARION...FLAGLER AND
VOLUSIA.

STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND SHOWERS WERE OVER THE
PENINULSA FROM LAKE CITY AND JACKSONVILLE SOUTH TO TAMPA AND VERO BEACH.

THE HEAVIEST RAIN WAS FALLING BETWEEN JACKSONVILLE AND GAINESVILLE AND
BETWEEN OCALA AND LAKELAND AND ALSO ALONG THE COAST BETWEEN CAPE CANAVERAL
AND DAYTONA BEACH.

MOVEMENT WAS NORTHEAST AT 10 MPH.
Special weather statement, Aug 8, 3:53 PM EDT, 19 minutes before
FLZ017-011-016-012-082100-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
351 PM EDT WED AUG 8 1990

...STRONG THUNDERSTORMS WERE FROM WEST OF COCOA TO TITUSVILLE AND
FROM JUST SOUTH OF MELBOURNE TO VERO BEACH...

...SOME STREET FLOODING IN TITUSVILLE...

...SEVERE THUNDERSTORM WATCH NUMBER 647 REMAINS IN EFFECT FOR MUCH OF
CENTRAL FLORIDA UNTIL 8 PM EDT...

AT 345 PM EDT NATIONAL WEATHER SERVICE RADARS INDICATED STRONG
THUNDERSTORMS OVER BREVARD AND INDIAN RIVER COUNTIES...MAINLY FROM
WEST OF COCOA TO TITUSVILLE AND FROM SOUTH OF MELBOURNE TO VERO BEACH.
THESE STORMS HAVE BEEN PRODUCING VERY HEAVY RAIN AND SOME STREET
FLOODING HAS OCCURRED IN THE TITUSVILLE AREA. THERE IS THE POSSIBILITY
THAT THESE STORMS COULD BECOME SEVERE PRODUCING WIND GUSTS OF AT LEAST
58 MPH AND/OR HAIL OF THREE QUARTER INCH IN DIAMETER OR LARGER.
MOVEMENT WAS NORTHEAST AT 10 MPH.

OTHER THUNDERSTORMS WERE FROM LAKELAND...TO MASCOTTE...TO ASTOR PARK
AND ALSO FROM OCALA...TO NEAR FLAGLER BEACH. THE THUNDERSTORMS IN LAKE
COUNTY HAVE SHOWN SIGN OF DECREASING BUT MAY INCREASE AGAIN AT ANY
TIME. DURING THE NEXT HOUR...STRONG THUNDERSTORMS ARE EXPECTED NEAR
COCJOA...AND OVER INDIAN RIVER COUNTY. RESIDENTS OF BREVARD COUNTY...
ESPECIALLY IN COCOA AND TITUSVILLE AND ALSO RESIDENTS IN INDIAN RIVER
COUNTY SHOULD REMAIN ALERT FOR POSSIBLE WARNINGS.
Special weather statement, Aug 8, 4:00 PM EDT, 12 minutes before
FLZ006>017-020-082100-

SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
350 PM EDT WED AUG 8 1990

...A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF
NORTH AND CENTRAL FLORIDA UNTIL 800 PM EDT...

THIS WATCH INCLUDES THE FOLLOWING COUNTIES...MARION...FLAGLER AND
VOLUSIA.

STRONG THUNDERSTORMS WITH VERY HEAVY RAIN AND SHOWERS WERE OVER THE
PENINULSA FROM LAKE CITY AND JACKSONVILLE SOUTH TO TAMPA QAND VERO BEACH.

THE HEAVIEST RAIN CONTINUED BETWEEN JACKSONVILLE AND GAINESVILLE AND FROM
LAKE GEORGE TO LAKELAND. OTHER VERY HEAVY RAINFALL WAS OCCURRING FROM CAPE
CANAVERAL TO COCOA.

MOVEMENT WAS NORTHEAST AT 10 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 1:12 PM EDTSevere Thunderstorm WarningMLBMarion63 min
Aug 8, 5:19 PM EDTSevere Thunderstorm WarningMLBVolusia56 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.