Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 20, NWS Melbourne, FL

February 18, 1992Flagler County, Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Feb 18, 1992, 9:12 PM EST for Flagler County, Volusia County, Florida. It was in force for 48 min. 2 reports 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: Feb 18, 1992, 9:12 PM EST (02:12 UTC)
Expired: Feb 18, 1992, 10:00 PM EST
In force: 48 min
Issued by: NWS Melbourne, FL
Area: Whole counties

Counties Flagler County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 140 km from the middle of the area, began a volume at 02:12 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.

What was reported inside it

Time	Report	Where	Remark
Feb 18, 9:15 PM EST	Hail 0.75	Volusia, FL
Feb 18, 9:55 PM EST	Hail 0.75	Volusia, 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

Jacksonville, FL (KAYS), launched 00:00Z, 2.2 hours before the alert went out and 145 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: 46 J/kg
Mixed-layer CIN: -127 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 281 m²/s²
0-3 km storm-relative helicity: 344 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDAB 190212
SVRDAB
FLC127-035-190300-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DAYTONA BEACH FL
912 PM EST TUE FEB 18 1992
 
THE NATIONAL WEATHER SERVICE IN DAYTONA BEACH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL FLORIDA
 
   ...VOLUSIA COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
IN NORTHEAST FLORIDA
 
   ...FLAGLER COUNTY
 
AND THE ADJACENT COASTAL WATERS.
 
 
RADAR INDICATED A SEVERE THUNDERSTORM NEAR BARBERVILLIE IN NORTHWEST
VOLUSIA COUNTY. THE STORM WAS MOVING TOWARD THE NORTHEAST AT 30 MPH.
 
REPORTS OF HAIL AND SEVERE LIGHTNING HAVE BEEN RECEIVERED.
 
 THE
STORM WILL MOVE INTO SOUTH FLAGLER COUNTY WITHIN THE HOUR.
PERSONS IN NORTHWEST VOLUSIA AND SOUTH FLAGLER COUNTY SHOULD STAY
ALERT AS THIS STORM MOVES THROUGH THE AREA.
 
 
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.

Nearby

Severe Thunderstorm Warnings in Florida, 1992 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.