Alert archive / Florida / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 16, NWS Jacksonville, FL
NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 12, 1992, 4:30 PM EDT for Clay County, Duval County, Saint Johns County, Florida. It was in force for 60 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
- Jun 12, 1992, 4:30 PM EDT (20:30 UTC)
- Expired
- Jun 12, 1992, 5:30 PM EDT
- In force
- 60 min
- Issued by
- NWS Jacksonville, FL
- Area
- Whole counties
Counties Clay County, FL, Duval County, FL, Saint Johns County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 4:30 PM EDT | Hail 0.88 | Duval, 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
Jacksonville, FL (KAYS), launched 12:00Z, 8.5 hours before the alert went out and 47 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
- 200 J/kg
- Mixed-layer CIN
- -78 J/kg
- Mixed-layer LCL
- 580 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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, Jun 12, 2:51 PM EDT, 1 hour 39 minutes before
FLZ007-008-092030 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 250 PM EDT FRI JUN 12 1992 AT 250 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS ALONG THE FLORIDA/GEORGIA BORDER IN NORTHERN BAKER..NORTHERN COLUMBIA.. NORTHERN SUWANNEE AND ACROSS MUCH OF HAMILTON COUNTIES FLORIDA. THESE STORMS HAVE A HISTORY OF CONTAINING STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES AND HAIL. THE THUNDERSORMS ARE MOVING EAST AT 15 MPH AND WILL BE MOVING INTO JASPER IN HAMILTON COUNTY WITHIN THE NEXT 1/2 HOUR AND INTO LAKE CITY IN COLUMBIA COUNTY WITHIN THE HOUR. REMEMBER MORE PEOPLE ARE KILLED BY LIGHTNING IN FLORIDA THAN ANY OTHER STATE IN THE COUNTRY. WHEN A THQUNDERSTORM THREATENS SEEK SHELTER IN A HOME OR BUILDING...AVOID OPEN BASEBALL FIELDS AND GOLF COURSES.
Special weather statement, Jun 12, 4:16 PM EDT, 14 minutes before
FLZ007-008-092215 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 415 PM EDT FRI JUN 12 1992 AT 410 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS IN THE VICINITIES OF LIVE OAK...LAKE CITY...MACLENNY AND JACKSONVILLE. THESE STORMS HAVE A HISTORY OF CONTAINING STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES AND HAIL. THE THUNDERSORMS ARE MOVING EAST AT 10 MPH AND WILL BE MOVING INTO THE COASTAL WATERS OFF JACKSONVILLE BEACH AND MAYPORT WITHIN THE HOUR. THESE THUNDERSTORMS CONTAIN HEAVY RAIN THAT WILL CAUSE TEMPORARY FLOODING OF STREETS...UNDERPASSES AND DRAINAGE DITCHES FOR THE NEXT TWO HOURS. MARINE INTERESTS OPERATING IN THE COASTAL WATERS OFF MAY-PORT AND JACKSONVILLE BEACH BE AWARE OF THE THREAT OF HIGH WINDS AND ROUGH SEAS WITH THESE THUNDERSTORMS. BE PREPARED TO SEEK SAFE HARBOR.
Special weather statement, Jun 12, 4:23 PM EDT, 7 minutes before
FLZ007-008-122215 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 415 PM EDT FRI JUN 12 1992 AT 410 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED STRONG THUNDERSTORMS IN THE VICINITIES OF LIVE OAK...LAKE CITY...MACLENNY AND JACKSONVILLE. THESE STORMS HAVE A HISTORY OF CONTAINING STRONG GUSTY WINDS..FREQUENT LIGHTNING STRIKES AND HAIL. THE THUNDERSORMS ARE MOVING EAST AT 10 MPH AND WILL BE MOVING INTO THE COASTAL WATERS OFF JACKSONVILLE BEACH AND MAYPORT WITHIN THE HOUR. THESE THUNDERSTORMS CONTAIN HEAVY RAIN THAT WILL CAUSE TEMPORARY FLOODING OF STREETS...UNDERPASSES AND DRAINAGE DITCHES FOR THE NEXT TWO HOURS. MARINE INTERESTS OPERATING IN THE COASTAL WATERS OFF^ MAYPORT AND JACKSONVILLE BEACH BE AWARE OF THE THREAT OF HIGH WINDS AND ROUGH SEAS WITH THESE THUNDERSTORMS. BE PREPARED TO SEEK SAFE HARBOR.
The office that day
Everything else NWS Jacksonville, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 4:30 PM EDT | Severe Thunderstorm Warning | JAX | Baker, Columbia | 60 min |
| Jun 12, 4:46 PM EDT | Tornado Warning | JAX | Clay, Duval, Saint Johns | 59 min |
| Jun 12, 6:32 PM EDT | Severe Thunderstorm Warning | JAX | Putnam, Saint Johns | 58 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1992Every severe thunderstorm warning in 1992
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.