Alert archive / Florida / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 21, NWS Tallahassee, FL

May 23, 1989Escambia County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at May 23, 1989, 4:27 PM CDT for Escambia County, Florida. It was in force for 63 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: May 23, 1989, 4:27 PM CDT (21:27 UTC)
Expired: May 23, 1989, 5:30 PM CDT
In force: 63 min
Issued by: NWS Tallahassee, FL
Area: Whole counties

County Escambia 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
May 23, 4:45 PM CDT	Hail 0.75	Escambia, 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

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 9.5 hours before the alert went out and 82 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2529 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 586 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPNS 232129
SVRPNS
FLC033-232230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PENSACOLA FL
427 PM CDT TUE MAY 23 1989
 
THE NATIONAL WEATHER SERVICE IN PENSACOLA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN NORTHWEST FLORIDA
          ...ESCAMBIA
 
A SEVERE THUNDERSTORM WAS INDICATED BY RADAR OVER NORTHERN ESCAMBIA
COUNTY FLORIDA.
 
THE STORM WAS MOVING TO THE SOUTHEAST AT 25 MILES AN HOUR.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 3:56 PM CDT	Severe Thunderstorm Warning	TAE	Okaloosa, Walton	64 min
May 23, 4:11 PM CDT	Severe Thunderstorm Warning	TAE	Santa Rosa	49 min
May 23, 4:56 PM CDT	Severe Thunderstorm Warning	TAE	Santa Rosa	34 min
May 23, 5:24 PM CDT	Severe Thunderstorm Warning	TAE	Escambia, Santa Rosa	66 min

Nearby

Severe Thunderstorm Warnings in Florida, 1989 Every severe thunderstorm warning in 1989

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.