Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 39, NWS Melbourne, FL

July 25, 1990Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 25, 1990, 5:28 PM EDT for Osceola County, Florida. It was in force for 62 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 25, 1990, 5:28 PM EDT (21:28 UTC)
Expired: Jul 25, 1990, 6:30 PM EDT
In force: 62 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Osceola County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

Time	Report	Where	Remark
Jul 25, 5:35 PM EDT	Thunderstorm Wind 50	Osceola, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.5 hours before the alert went out and 78 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1083 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1081 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 6 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 252130
SVRMLB
FLC097-252230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
528 PM EDT WED JUL 25 1990
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  630 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL FLORIDA
 
   ...OSCEOLA COUNTY
 
AT 525 PM EDT A SEVERE THUNDERSTORM WAS CENTERED JUST SOUTH OF
ORLANDO MOVING SOUTH AT 10 MPH. THIS STORM HAS A HISTORY OF
PRODUCING WIND GUSTS OF 50 TO 60 MPH AND VERY INTENSE LIGHTNING
IN THE ORLANDO AREA. THE STORM WILL BE MOVING THROUGH THE
KISSIMME AND ST CLOUD AREAS.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58
MPH.c..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.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 3:45 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	45 min
Jul 25, 4:57 PM EDT	Severe Thunderstorm Warning	MLB	Orange	48 min

Nearby

Severe Thunderstorm Warnings in Florida, 1990 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.