Alert archive / Florida / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 35, NWS Melbourne, FL

July 22, 1990Palm Beach County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 22, 1990, 5:43 PM EDT for Palm Beach County, Florida. It was in force for 62 min.

The area

The counties it named.

The facts

Issued: Jul 22, 1990, 5:43 PM EDT (21:43 UTC)
Expired: Jul 22, 1990, 6:45 PM EDT
In force: 62 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Palm Beach 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, 9.7 hours before the alert went out and 203 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: 1009 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 972 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -18 m²/s²
0-3 km storm-relative helicity: -16 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 KPBI 222143
SVRPBI
FLC099-222245-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE WEST PALM BEACH FL
543 PM EDT SUN JUL 22 1990
 
THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL  645 PM EDT
FOR THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST FLORIDA
 
   ...SOUTHEASTERN PALM BEACH COUNTY
 
  AND FOR BOATERS ON THE WATERS...
 
   ...PALM BEACH INLET  TO  BOYNTON INLET
   ...BOYNTON INLET  TO  BOCA RATON INLET
 
RADAR SHOWED SEVERE THUNDERSTORMS HAD FORMED OVER THE FLORIDA TURNPIKE
AREA OF SOUTHEAST PALM BEACH COUNTY. THE THUNDERSTORMS WERE SPREADING
NORTH TOWARD LAKE WORTH AND WEST PALM BEACH AS THEY MOVED TO THE EAST
AT 10 MPH.
 
THESE SEVERE THUNDERSTORMS WILL MOVE INTO THE PALM BEACH COUNTY
COASTAL WATERS AND BOATERS SHOULD SEEK SAFE HARBOR NOW.
 
 
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.
 |
NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 4:14 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	31 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; the sounding from the Mesonet's radiosonde archive.