Alert archive / Florida / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 66, NWS Tallahassee, FL
NWS Tallahassee, FL issued this severe thunderstorm warning at Aug 18, 1990, 5:02 PM CDT for Bay County, Florida. It was in force for 58 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 18, 1990, 5:02 PM CDT (22:02 UTC)
- Expired
- Aug 18, 1990, 6:00 PM CDT
- In force
- 58 min
- Issued by
- NWS Tallahassee, FL
- Area
- Whole counties
County Bay 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 18, 6:00 PM CDT | Thunderstorm Wind 0 | Bay, 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
Apalachicola Mun, FL (KAQQ), launched 12:00Z, 10.0 hours before the alert went out and 83 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
- 2311 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 821 m above ground
- 0-6 km bulk shear
- 8 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- 24 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 KPNS 182220 SVRPNS FLC005-182300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PENSACOLA FL 502 PM CDT SAT AUG 18 1990 THE NATIONAL WEATHER SERVICE IN PENSACOLA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 600 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN NORTHWEST FLORIDA ...NORTHERN BAY COUNTY A SEVERE THUNDERSTORM WAS INDICATED BY RADAR OVER NORTH BAY COUNTY OF FLORIDA. LJITTLE OR NO MOVEMENT WAS NOTED. LARGE HAIL...ALONG WITH FREQUENT LIGHTNING...GUSTY WINDS AND LOCALLY HEAVY RAIN ICAN BE EXPECTED WITH THIS THUNDERSTORM.
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 18, 3:29 PM CDT, 1 hour 33 minutes before
FLZ005-182130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TALLAHASSEE FL 426 PM EDT SAT AUG 18 1990 AT 425 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A STRONG THUNDERSTORM 10 MILES NORTHEAST OF TALLAHASSEE OVER NORTHERN LEON COUNTY. THIS THUNDERSTORM IS CAPABLE OF PRODUCING VERY HEAVY RAINFALL...FREQUENT CLOUD TO GROUND LIGHTNING...STRONG GUSTY WINDS...AND POSSIBLE SMALL HAIL. MOVEMENT WAS TOWARD THE SOUTH SOUTHWEST AT 10 MILES AN HOUR AND THIS THUNDERSTORM SHOULD MOVE ACROSS THE EASTERN HALF OF LEON COUNTY OF NORTH FLORIDA DURING THE NEXT HOUR. JGM
The office that day
Everything else NWS Tallahassee, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 4:19 PM CDT | Severe Thunderstorm Warning | TAE | Jackson | 26 min |
| Aug 18, 5:05 PM CDT | Severe Thunderstorm Warning | TAE | Gadsden, Liberty | 40 min |
| Aug 18, 5:21 PM CDT | Severe Thunderstorm Warning | TAE | Calhoun | 39 min |
Nearby
Severe Thunderstorm Warnings in Florida, 1990Every severe thunderstorm warning in 1990
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.