Alert archive / Florida / Tornado Warnings in 1987
Tornado Warning 8, NWS Jacksonville, FL
NWS Jacksonville, FL issued this tornado warning at Sep 11, 1987, 4:39 PM EDT for Columbia County, Florida. It was in force for 66 min.
The area
The counties it named.
The facts
- Issued
- Sep 11, 1987, 4:39 PM EDT (20:39 UTC)
- Expired
- Sep 11, 1987, 5:45 PM EDT
- In force
- 66 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
County Columbia 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, 8.7 hours before the alert went out and 94 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
- 1074 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 911 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 54 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 112039 TORJAX FLC023-112145- BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE JACKSONVILLE FL 439 PM EDT FRI SEP 11 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 545 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHEAST FLORIDA...COLUMBIA AT 510 PM EDT THE PUBLIC HAS REPORTED A TORNADO IN THE LAKE CITY AREA...WEST OF INTERSTATE 75...MOVING TO THE NORTHWEST. 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 TORNADO..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, Sep 11, 3:35 PM EDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 335 PM EDT FRI SEP 11 1987 ...STRONG THUNDERSTORMS IN THE JACKSONVILLE METROPOLITAN AREA... DURING THE PAST HOUR STRONG THUNDERSTORMS HAVE DEVELOPED IN THE JACKSONVILLE METROPOLITAN AREA. SOME STRONG THUNDERSTORMS AND SHOWERS WERE ALSO NEAR THE COAST FROM DAYTONA BEACH NORTH TO FERNANDINA BEACH. IN THE PAST HOUR NEARLY AN INCH OF RAIN HAS FALLEN IN THE GLENLEA SECTION OF JACKSONVILLE AND IT IS STILL RAINING HARD. SOME STREET FLOODING WAS OCCURRING IN THE GLENLEA SECTION OF JACKSONVILLE. PERIODS OF LOCALLY HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING STRIKES...AND POSSIBLY SOME SMALL HAIL WILL ACCOMPANY THESE STRONGER THUNDERSTORMS. REMEMBER...MORE PEOPLE ARE KILLED BY LIGHTNING IN FLORIDA THAN ANY OTHER STATE IN THE COUNTRY. WHEN A THUNDERSTORM THREATENS TRY TO GET INSIDE A HOME OR LARGE BUILDING. IF YOU DO NOT HAVE TIME TO REACH A SAFE BUILDING OR CAR...AVOID OPEN FIELDS SUCH AS GOLF COURSES... BASEBALL FIELDS...BEACHES...OR FISHING FROM A SMALL BOAT OR PIERS. SLOW MOVING THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINS WILL CAUSE TEMPORARY FLOODING OF SMALL CREEKS...LOW LYING AREAS...DRAINAGE DITCHES...AND UNDERPASSES FOR THE NEXT 1 TO 3 HOURS. MARINE INTERESTS OPERATING IN THE COASTAL WATERS OFF MAYPORT... ST. AUGUSTINE...AMELIA ISLAND BE ALERT FOR GUSTY WINDS...BUILDING SEAS...AND POOR VISIBILITY AS THESE THUNDERSTORMS MOVE OFF THE COAST WITHIN THE HOUR. BE PREPARED TO SEEK SAFE HARBOR IF THREATENING CONDITIONS ARE SIGHTED.
Special weather statement, Sep 11, 4:03 PM EDT, 36 minutes before
SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE JACKSONVILLE FL 335 PM EDT FRI SEP 11 1987 ...STRONG THUNDERSTORMS IN THE JACKSONVILLE METROPOLITAN AREA... DURING THE PAST HOUR STRONG THUNDERSTORMS HAVE DEVELOPED IN THE JACKSONVILLE METROPOLITAN AREA. SOME STRONG THUNDERSTORMS AND SHOWERS WERE ALSO NEAR THE COAST FROM DAYTONA BEACH NORTH TO FERNANDINA BEACH. IN THE PAST HOUR NEARLY AN INCH OF RAIN HAS FALLEN IN THE GLENLEA SECTION OF JACKSONVILLE AND IT IS STILL RAINING HARD. SOME STREET FLOODING WAS OCCURRING IN THE GLENLEA SECTION OF JACKSONVILLE. PERIODS OF LOCALLY HEAVY RAIN...GUSTY WINDS...DANGEROUS LIGHTNING STRIKES...AND POSSIBLY SOME SMALL HAIL WILL ACCOMPANY THESE STRONGER THUNDERSTORMS. REMEMBER...MORE PEOPLE ARE KILLED BY LIGHTNING IN FLORIDA THAN ANY OTHER STATE IN THE COUNTRY. WHEN A THUNDERSTORM THREATENS TRY TO GET INSIDE A HOME OR LARGE BUILDING. IF YOU DO NOT HAVE TIME TO REACH A SAFE BUILDING OR CAR...AVOID OPEN FIELDS SUCH AS GOLF COURSES... BASEBALL FIELDS...BEACHES...OR FISHING FROM A SMALL BOAT OR PIERS. SLOW MOVING THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINS WILL CAUSE TEMPORARY FLOODING OF SMALL CREEKS...LOW LYING AREAS...DRAINAGE DITCHES...AND UNDERPASSES FOR THE NEXT 1 TO 3 HOURS. MARINE INTERESTS OPERATING IN THE COASTAL WATERS OFF MAYPORT... ST. AUGUSTINE...AMELIA ISLAND BE ALERT FOR GUSTY WINDS...BUILDING SEAS...AND POOR VISIBILITY AS THESE THUNDERST3ORMS MOVE OFF THE COAST WITHIN THE HOUR. BE PREPARED TO SEEK SAFE HARBOR IF THREATENING CONDITIONS ARE SIGHTED. MOVEMENT OF THESE THUNDERSTORMS WAS NORTHEAST AT 10 MPH.
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 4:44 PM EDT | Tornado Warning | JAX | Saint Johns | 31 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.