Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 6, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jun 4, 1990, 5:30 PM EDT for Palm Beach County, Florida. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jun 4, 1990, 5:30 PM EDT (21:30 UTC)
- Expired
- Jun 4, 1990, 6:30 PM EDT
- In force
- 60 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, 9.5 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPBI 042129 SVRPBI FLC099-042230- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WEST PALM BEACH FL 530 PM EDT MON JUN 4 1990 THE NATIONAL WEATHER SERVICE IN WEST PALM BEACH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM EDT FOR THE FOLLOWING LOCATIONS... IN SOUTHEAST FLORIDA ...SOUTHEASTERN PALM BEACH COUNTY AND THE ADJACANT WATERS OF THE SOUTHEAST FLORIDA COAST AT 530 PM EDT WEATHER SERVICE RADAR WAS INDICATING A SEVERE THUNDERSTORM JUST SOUTH OF BOCA RATON ON THE BROWARD - PALM BEACH COUNTY LINE MOVING TO THE NORTHEAST AT 10 MPH. THIS THUNDERSTORM IS EXPECTD TO PRODUCE WIND GUSTS OF 55 MILES AN HOUR...3/4 QUARTER INCH HAIL AND OR DANGEROUS LIGHTNING STRIKES. ALSO...HEAVY DOWNPOURS MAY CAUSE STREET FLOODING. NNNN
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 4, 4:36 PM EDT, 54 minutes before
FLZ012-042200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DAYTONA BEACH FL 435 PM EDT MON JUN 4 1990 THIS IS A SPECIAL WEATHER STATEMENT FOR FLAGLER AND VOLUSIA COUNTIES AND THEIR ADJACENT COASTAL WATERS... AT 435 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED VERY STRONG THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS...FREQUENT DANGEROUS LIGHTNING STRIKES ...POSSIBLY SMALL HAIL...AND VERY HEAVY RAINFALL AMOUNTS...EXTENDING FROM THE COASTAL WATERS OF FLAGLER COUNTY INTO THE THE NORTHWEST CORNER OF VOLUSIA COUNTY NEAR LAKE GEORGE. THESE THUNDERSTORM WILL MOVE EAST AT AROUND 10 MPH. PERSONS IN THE AFFECTED AREA SHOULD BE PREPARED FOR THE APPROACH OF THESE THUNDERSTORMS AND AND BE PREPARED TO SEEK SAFE SHELTER IMMEDIATELY. BOATERS OVER THE ATLANTIC AND INTRACOASTAL WATERWAYS ALONG FLAGLER AND VOLUSIA COUNTIES EAST COAST...SHOULD EXPECT LOCALLY ROUGH SEAS AND STRONG GUSTY WINDS TO ACCOMPANY THESE THUNDERSTORMS FOR THE NEXT HOUR OR SO.
Special weather statement, Jun 4, 4:47 PM EDT, 43 minutes before
FLZ017-011-016-012-042245- SPECIAL EAST CENTRAL FLORIDA WEATHER UPDATE NATIONAL WEATHER SERVICE MELBOURNE FL 445 PM EDT MON JUN 4 1990 AT 445 PM STRONG THUNDERSTORMS WERE ALONG THE COAST FROM NORTH OF DAYTONA INTO FLAGLER COUNTY. THESE THUNDERSTORMS WILL LIKELY PRODUCE STRONG GUSTY WINDS FREQUENT DANGEROUS LIGHTNING...HEAVY DOWNPOURS AND POSSIBLE SMALL HAIL. OTHER THUNDERSTORMS WERE ACTIVE ALONG THE COAST FROM CAPE CANAVERAL TO MELBOURNE TO NEAR VERO BEACH. THUNDERSTORMS WERE ALSO INLAND FROM NEAR KISSIMMEE WEST AND SOUTH INTO POLK COUNTY. ALL THUNDERSTORMS WERE MOVING EAST AT 15 MPH. DURING THE NEXT 2 HOURS THUNDERSTORMS WILL CONTINUE TO INCREASE OVER MUCH OF CENTRAL FLORIDA ESPECIALLY ALONG THE EAST COAST AND WILL LIKELY DRIFT OVER THE ADJACENT COASTAL WATERS.
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, 6:12 PM EDT | Severe Thunderstorm Warning | MLB | Indian River | 33 min |
| Jun 4, 6:34 PM EDT | Severe Thunderstorm Warning | MLB | Saint Lucie | 56 min |
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.