Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 17, NWS Melbourne, FL

June 25, 1990Lake County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 25, 1990, 7:28 PM EDT for Lake County, Florida. It was in force for 47 min.

The area

The counties it named.

The facts

Issued
Jun 25, 1990, 7:28 PM EDT (23:28 UTC)
Expired
Jun 25, 1990, 8:15 PM EDT
In force
47 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Lake 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, 11.5 hours before the alert went out and 123 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, Cape Canaveral, FL at 12:00Z on 1990-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2968 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, Cape Canaveral, FL at 12:00Z on 1990-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
2968 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
656 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
20 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 252327
SVRMLB
FLC069-260015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
728 PM EDT MON JUN 25 1990
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  815 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL FLORIDA
 
   ...SOUTHERN LAKE COUNTY
 
AT 725 PM EDT NATIONAL WEATHER SERVICE RADARS INDICATED A SEVERE
THUNDERSTORM IN SOUTH LAKE COUNTY NEAR THE TOWN OF MASCOTTE. MOVEMENT
WAS NORTHEAST AT 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 YOUR HOME OR BUSINESS.  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, Jun 25, 7:16 PM EDT, 12 minutes before
FLZ011-260015-

SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE
NATIONAL WEATHER SERVICE MELBOURNE FL
717 PM EDT MON JUN 25 1990

AT 712 PM EDT NATIONAL WEATHER SERVICE RADARS INDICATED A CLUSTER OF
STRONG THUNDERSTORMS IN SOUTH LAKE COUNTY...EXTENDING INTO SOUTHWEST
ORANGE COUTNY NEAR DISNEY. OTHER STRONG THUNDERSTORMS WERE DEVELOPING
IN SEMINOLE COUNTY NEAR SANFORD AS WELL. THESE STORMS WILL LIKELY
PRODUCE STRONG GUSTY WINDS...FREQUENT CLOUD TO GROUND LIGHTNING...AND
VERY HEAVY RAIN. SMALL HAIL IS ALSO A POSSIBILITY. MOVEMENT WAS
NORTHEAST AT 10 MPH.

PEOPLE NEAR THESE STORMS SHOULD REMAIN ALERT TO THREATENING WEATHER
CONDITIONS FOR THE NEXT HOUR OR SO. BE PREPARED TO TAKE ACTION IF A
SEVERE THUNDERSTORM WARNING IS ISSUED. THE STORMS IN SOUTH LAKE COUNTY
STILL SEEM TO BE INCREASING IN INTENSITY. LISTEN TO NOAA WEATHER RADIO
FOR THE MOST CURRENT AND ACCURATE INFORMATION.

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.