Alert archive / Florida / Tornado Warnings in 1990

Tornado Warning 11, NWS Tallahassee, FL

March 17, 1990Bay County, Florida

NWS Tallahassee, FL issued this tornado warning at Mar 17, 1990, 12:47 AM CST for Bay County, Florida. It was in force for 28 min.

The area

The counties it named.

The facts

Issued
Mar 17, 1990, 12:47 AM CST (06:47 UTC)
Expired
Mar 17, 1990, 1:15 AM CST
In force
28 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.

The nearest sounding before it

Apalachicola Mun, FL (KAQQ), launched 00:00Z, 6.8 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.

Skew-T log-pSkew-T log-p diagram, Apalachicola Mun, FL at 00:00Z on 1990-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 557 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Apalachicola Mun, FL at 00:00Z on 1990-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 257 square meters per square second.1939587897117Sfc1 km3 km6 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
557 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
83 kt
0-1 km storm-relative helicity
257 m²/s²
0-3 km storm-relative helicity
250 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPNS 170644
TORPNS
FLC005-170715-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE PENSACOLA FL
1247 AM CST SAT MAR 17 1990
 
THE NATIONAL WEATHER SERVICE IN PENSACOLA HAS ISSUED A
TORNADO AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  115 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHWEST FLORIDA
 
   ...SOUTHERN BAY COUNTY
 
  AND FOR BOATERS AND MARINE INTERESTS ON THE COASTAL WATERS OF
 
  ...BAY
 J
RADAR INDICATED A POSSIBLE WATERSPOUT...A SEA-GOING TORNADO...12 MILES
SOUTHWEST OF PANAMA CITY.
 
THE THUNDERSTORM PRODUCING THE SUSPECT STORM WAS MOVING TO THE
NORTHEAST AT 45 MILES AN HOUR...TOWARD THE BEACHES OF CENTRAL BAY
COUNTY.

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 16, 7:48 PM CSTFlash Flood WarningTAEOkaloosa, Walton3 hr
Mar 16, 7:48 PM CSTFlash Flood WarningTAEEscambia, Santa Rosa3 hr

Nearby

Tornado Warnings in Florida, 1990Every tornado warning in 1990Tornadoes 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; the sounding from the Mesonet's radiosonde archive.