Alert archive / Florida / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 29, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 2, 1989, 6:23 PM EDT for Orange County, Florida. It was in force for 67 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
- Aug 2, 1989, 6:23 PM EDT (22:23 UTC)
- Expired
- Aug 2, 1989, 7:30 PM EDT
- In force
- 67 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Orange 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 |
|---|---|---|---|
| Aug 2, 6:45 PM EDT | Thunderstorm Wind 50 | Orange, 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, 10.4 hours before the alert went out and 81 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
- 1693 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 936 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 15 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 KMCO 022234
SVRMCO
FLC095-022330-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ORLANDO FL
623 PM EDT WED AUG 2 1989
THE NATIONAL WEATHER SERVICE IN ORLANDO HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN CENTRAL FLORIDA
...EASTERN ORANGE
WEATHER SERVICE RADAR INDICATES A VERY STRONG THUNDERSTORM IN EASTERN
ORANGE COUNTY. THIS THUNDERSTORM IS MOVING SLOWLY TO THE SOUTH.
RESIDENTS IN THE AREA OF THIS THUNDERSTORM MAY EXPECT HEAVY RAIN...
FREQUENT LIGHTNING...STRONG GUSTY WIND AND POSSIBLE SMALL HAIL.
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM
HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.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, Aug 2, 5:38 PM EDT, 45 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 535 PM EDT WED AUG 2 1989 ...A SEVERE THUNDERSTORMS WARNING IS IN EFFECT FOR FLAGLER COUNTY UNTIL 6PM EDT... AT 535PM RADAR SHOWED THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS...FREQUENT DANGEROUS LIGHTNING...HEAVY DOWNPOURS...AND POSSIBLE HAIL JUST NORTHWEST OF FLAGLER BEACH...NEAR GAINESVILLE...AND 10 MILES WEST OF TITUSVILLE. OTHER THUNDERSTORMSo AND SHOWERS WERE BETWEEN ASTOR PARK AND DUNNELLON AND FROM THE ORLANDO AREA TO SEBASTIAN. MOVEMENT WAS SOUTH 15 MPH.
Special weather statement, Aug 2, 5:43 PM EDT, 40 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DAYTONA BEACH FL 535 PM EDT WED AUG 2 1989 ...A SEVERE THUNDERSTORM WARNING IS IN EFFECT FOR FLAGLER COUNTY UNTIL 615PM EDT... AT 535PM RADAR SHOWED THUNDERSTORMS CAPABLE OF PRODUCING STRONG GUSTY WINDS...FREQUENT DANGEROUS LIGHTNING...HEAVY DOWNPOURS...AND POSSIBLE HAIL JUST NORTHWEST OF FLAGLER BEACH...NEAR GAINESVILLE...AND 10 MILES WEST OF TITUSVILLE. OTHER THUNDERSpTORMS AND SHOWERS WERE BETWEEN ASTOR PARK AND DUNNELLON AND FROM THE ORLANDO AREA TO SEBASTIAN. MOVEMENT WAS SOUTH 15 MPH.
Special weather statement, Aug 2, 6:18 PM EDT, 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ORLANDO FL 620 PM EDT WED AUG 2 1989 WEATHER SERVICE RADAR INDICATES VERY STRONG THUNDERSTORMS HAVE DEVELOPED IN EAST ORANGE COUNTY. THESE THUNDERSTORMS ARE MOVING VERY SLOWLY TO THE SOUTH. SHOWER AND THUNDERSTORM ACTIVITY WILL CONTINUE OVER CENTRAL FLORIDA FOR THE REMAINDER OF THE AFTERNOON AND EARLY EVENING HOURS. RESIDENTS IN THE AFFECTED AREA CAN EXPECT FREQUENT LIGHTNING... HEAVY RAIN...STRONG GUSTY WIND AND POSSIBLY SMALL HAIL AS THESE THUNDERSTORMS MOVE THROUGH THEIR AREA.
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 5:14 PM EDT | Severe Thunderstorm Warning | MLB | Flagler | 61 min |
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.