Alert archive / Florida / Tornado Warnings in 1999

Tornado Warning 21, NWS Tallahassee, FL

May 7, 1999Bay County, Florida

NWS Tallahassee, FL issued this tornado warning at May 7, 1999, 4:13 AM CDT for Bay County, Florida. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 7, 1999, 4:13 AM CDT (09:13 UTC)
Expired
May 7, 1999, 4:45 AM CDT
In force
32 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Bay County, FL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 7, 2:15 AM CDTTornado WatchSPC6 hr

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 9.2 hours before the alert went out and 129 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, Tallahassee Rgnl, FL at 00:00Z on 1999-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1740 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 00:00Z on 1999-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939Sfc1 km3 km6 km9 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
1740 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
86 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 KTLH 070913 RRA
TORTLH
FLC005-070945-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
513 AM EDT FRI MAY 7 1999

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* TORNADO WARNING FOR...
  BAY COUNTY IN NORTHWESTERN FLORIDA

* UNTIL 445 AM CDT (545 AM EDT)

* AT 411 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A DEVELOPING TORNADO 4 MILES SOUTHEAST OF PANAMA CITY... MOVING
  NORTHEAST AT 15 MPH. THIS STORM WILL ALSO LIKELY PRODUCE LARGE
  HAIL.



THIS IS A DANGEROUS SITUATION.  ACT QUICKLY.  IF YOU ARE IN
THE PATH OF THIS TORNADO...MOVE TO A SHELTER BELOW GROUND IF
AVAILABLE.  OTHERWISE...GO TO A SMALL INTERIOR ROOM ON THE LOWEST
FLOOR.

THIS TORNADO IS LIKELY OBSCURED BY HEAVY RAIN AND MAY NOT BE
VISIBLE.
GO TO A PLACE OF SAFETY IMMEDIATELY.

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 2:07 AM CDTTornado WarningTAEBay33 min
May 7, 2:46 AM CDTTornado WarningTAEBay59 min
May 7, 3:44 AM CDTTornado WarningTAEJackson31 min
May 7, 4:51 AM CDTSevere Thunderstorm WarningTAEBay34 min
May 7, 5:42 AM CDTFlash Flood WarningTAEBay4 hr
May 7, 6:20 AM CDTTornado WarningTAEGulf35 min

Nearby

Tornado Warnings in Florida, 1999Every tornado warning in 1999Tornadoes in 1999

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.