Alert archive / Florida / Tornado Warnings in 1987
Tornado Warning 4, NWS Jacksonville, FL
NWS Jacksonville, FL issued this tornado warning at Jul 23, 1987, 6:11 PM EDT for Bradford County, Florida. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jul 23, 1987, 6:11 PM EDT (22:11 UTC)
- Expired
- Jul 23, 1987, 7:00 PM EDT
- In force
- 49 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
County Bradford 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
Jacksonville, FL (KAYS), launched 12:00Z, 10.2 hours before the alert went out and 76 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
- 524 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1382 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 76 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 KJAX 232211 RRA TORJAX FLC007-232300- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE JACKSONVILLE FL 611 PM EDT THU JUL 23 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 700 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST FLORIDA...BRADFORD AT 600 PM EDT A TORNADO HAD BEEN SIGHTED WEST OF STARKE NEAR STATE ROAD 125. SOME TREE AND POWER LINE DAMAGE HAS BEEN REPORTED. THE MOVEMENT OF THE THUNDERSTORMS IN THAT AREA WAS TO THE SOUTHWEST AT 10 TO 15 MILES AN HOUR. IF YOU ARE IN THE PATH OF THIS TORNADO..THE SAFEST PLACE IS A BASEMENT. GET UNDER A PIECE OF STURDY FURNITURE. IF NO BASEMENT IS AVAILABLE..SEEK SHELTER IN AN INTERIOR ROOM ON THE LOWEST FLOOR. USE BLANKETS OR PILLOWS TO COVER YOUR BODY. AVOID WINDOWS. DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A TO RNADO..LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO STRUCTURE IS NEARBY..SEEK SHELTER IN A DITCH OR LOW SPOT.
What forecasters said that day
The local office's own words before this tornado 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, Jul 23, 2:44 PM EDT, 3 hours 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 243 PM EDT THU JUL 23 1987 ...OZONE ADVISORY IN EFFECT FOR JACKSONVILLE UNTIL 500 PM EDT... DR. PATRICIA C. COWDERY...DIRECTOR OF THE DEPARTMENT OF HEALTH... WELFARE...AND BIO ENVIRONMENTAL SERVICES HAS ISSUED AN OZONE ADVISORY FOR JACKSONVILLE. AT 200 PM EDT THE AIR QUALITY INDEX READING WAS 134 WHICH IS IN THE UNHEALTHFUL CATEGORY. PERSONS WITH EXISTING HEART OR RESPIRATORY AILMENTS SHOULD REDUCE PHYSICAL EXERCISE AND OUTDOOR ACTIVITY. MOTORISTS SHOULD REFRAIN FROM UNNECESSARY DRIVING. AGAIN...THE OZONE ADVISORY FOR UNHEALTHFUL CONDITIONS IS IN EFFECT UNTIL 5 PM EDT. ...ALSO VERY HOT OVER NORTHEAST FLORIDA... AT 155 PM EDT THE TEMPERATURE AT JACKSONVILLE INTERNATIONAL AIRPORT REACHED 99 DEGREES...TYING THE RECORD FOR THIS DATE SET IN 1952. THE COMBINATION OF 99 DEGREE HEAT WITH A RELATIVE HUMIDITY OF 42 PERCENT GIVES A HEAT INDEX TEMPERATURE OF 110 DEGREES. THIS IS IN THE VERY HOT CATEGORY. IF WORKING OUTDOORS SUNSTROKE...HEAT CRAMPS... OR HEAT EXHAUSTION IS LIKELY...AND HEATSTROKE POSSIBLE WITH PROLONGED EXPOSURE AND/OR PHYSICAL ACTIVITY. IF POSSIBLE GET RELIEF IN AN AIRCONDITIONED BUILDING OR WITH THE USE OF FANS AND SHADE. A CHECK SHOULD BE MADE ON THE ELDERLY... THE VERY YOUNG...AND THOSE WITH HEART OR RESPIRATORY AILMENTS... ESPECIALLY THOSE LIVING IN A NON AIRCONDITIONED RESIDENCE.
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 5:58 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Union | 32 min |
| Jul 23, 7:58 PM EDT | Tornado Warning | JAX | Gilchrist, Suwannee | 32 min |
Nearby
Tornado Warnings in Florida, 1987Every tornado warning in 1987Tornadoes in 1987
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.