Alert archive / Florida / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 8, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 5, 1989, 3:10 PM EDT for Martin County, Saint Lucie County, Florida. It was in force for 65 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
- Apr 5, 1989, 3:10 PM EDT (19:10 UTC)
- Expired
- Apr 5, 1989, 4:15 PM EDT
- In force
- 65 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
Counties Martin County, FL, Saint Lucie 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 |
|---|---|---|---|
| Apr 5, 3:25 PM EDT | Hail 0.75 | Martin, 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, 7.2 hours before the alert went out and 138 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
- 2341 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 463 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.6
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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, Apr 5, 11:11 AM EDT, 3 hours 59 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 1110 AM EDT WED APR 5 1989 ...STRONG THUNDERSTORMS MOVING IN MARION COUNTY... STRONG THUNDERSTORMS WERE MOVING INTO MARION COUNTY FROM THE WEST AND SHOULD COUNTINUE FOR THE NEXT THREE TO FOUR HOURS. THESE THUNDERSTORMS WILL PRODUCE LIGHTNING..HEAVY RAIN..STRONG WIND GUSTS...AND POSSIBLE HAIL. THE THUNDERSTORMS WERE MOVING NORTHEAST 25 MILES AN HOUR.
Special weather statement, Apr 5, 2:04 PM EDT, 1 hour 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ORLANDO FL 205 PM EDT WED APR 5 1989 ...A TORNADO WATCH IS IN EFFECT FOR THE CENTRAL FLORIDA COUNTIES OF LAKE...ORANGE...SEMINOLE AND OSCEOLA UNTIL 9 PM TONIGHT... AT 200 PM EDT WEATHER RADAR WAS SHOWING SCATTERED SHOWERS AND THUNDER- STORMS OVER NORTHERN LAKE AND SEMINOLE COUNTIES. ANOTHER THUNDERSTORMS WAS LOCATED IN CENTRAL ORANGE COUNTY. THUNDERSTORMS ARE MOVING RAPIDLY NORTHEAST AT ABOUT 25 MPH. STRONGER THUNDERSTORMS WILL PRODUCE STRONG AND GUSTY WINDS...FREQUENT LIGHTNING...HAIL AND POSSIBLE TORNADOS AS THEY DEVELOP AND MOVE THROUGH CENTRAL FLORIDA THE REMAINDER OF THIS AFTERNOON AND EVENING. A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOS AND SEVERE THUNDERSTORMS. PERSONS IN THESE AREAS SHOULD BE ON THE ALERT FOR SEVERE WEATHER AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
Special weather statement, Apr 5, 2:40 PM EDT, 30 minutes before
RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 228 PM EDT WED APR 5 1989 ...A TORNADO WATCH REMAINS IN EFFECT UNTIL 9 PM EDT FOR CENTRAL FLORIDA INCLUDING MARION...VOLUSIA...BREVARD...AND INDIAN RIVER COUNTIES... STRONG THUNDERSTORMS HAD DEVELOPED ALONG AND JUST OFFSHORE THE COAST BETWEEN DAYTONA BEACH AND MELBOURNE. OTHER SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH VERY HEAVY RAIN... CONTINUED OVER CENTRAL FLORIDA FROM ST AUGUSTIN TO THE TAMPA BAY AREA AND SOUTH TO LAKE OKEECHOBEE. THE AREA EXTENDED OVER THE ATLANTIC TO MORE THAN 100 MILES OFFSHORE BETWEEN ST AUGUSTINE AND VERO BEACH. MOVEMENT WAS EAST 25 MILES AN HOUR.
Nearby
Severe Thunderstorm Warnings in Florida, 1989Every severe thunderstorm warning in 1989
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.