Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 7, NWS Melbourne, FL

June 4, 1990Indian River County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 4, 1990, 6:12 PM EDT for Indian River County, Florida. It was in force for 33 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: Jun 4, 1990, 6:12 PM EDT (22:12 UTC)
Expired: Jun 4, 1990, 6:45 PM EDT
In force: 33 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Indian River 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
Jun 4, 6:20 PM EDT	Thunderstorm Wind 0	Indian River, FL
Jun 4, 6:37 PM EDT	Thunderstorm Wind 62	Indian River, 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, 10.2 hours before the alert went out and 86 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: 928 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -18 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 042215
SVRMLB
FLC061-042245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
612 PM EDT MON JUN 4 1990
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  645 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL FLORIDA
 
   ...EASTERN INDIAN RIVER COUNTY
 
  AND FOR MARINE INTERESTS ON THE COASTAL WATERS FROM...
 
   ...SEBASTIAN INLET  TO  VERO BEACH
 
AT 612 PM A SEVERE THUNDERSTORM WAS OVER THE COAST AT SEBASTIAN INLET.
THE THUNDERSTORM WAS MOVING TO THE SOUTHEAST AT 15 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
 
BOATERS AND MARINERS IN THE PATH OF THIS STORM SHOULD TAKE
NECESSARY PRECAUTIONS. SEEK SAFE HARBOR IMMEDIATELY IF POSSIBLE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 4, 4:37 PM EDT	Tornado Warning	MLB	Palm Beach	53 min
Jun 4, 5:30 PM EDT	Severe Thunderstorm Warning	MLB	Palm Beach	60 min
Jun 4, 6:34 PM EDT	Severe Thunderstorm Warning	MLB	Saint Lucie	56 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.