Alert archive / Florida / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 150, NWS Tallahassee, FL

July 17, 1995Wakulla County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 17, 1995, 5:21 PM EDT for Wakulla County, Florida. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jul 17, 1995, 5:21 PM EDT (21:21 UTC)
Expired
Jul 17, 1995, 6:03 PM EDT
In force
42 min
Issued by
NWS Tallahassee, FL
Area
Whole counties

County Wakulla County, FL

The radar

The Tallahassee radar (KTLH), 28 km from the middle of the area, began a volume at 21:21 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 9.4 hours before the alert went out and 29 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 12:00Z on 1995-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2407 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 12:00Z on 1995-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
2407 J/kg
Mixed-layer CIN
-62 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KTLH 172121 RRA
SVRTLH
FLC129-FLZ505-172215-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE TSTM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
521 PM EDT (421 PM CDT) MON JUL 17 1995
 
THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A
SEVERE TSTM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL  615 PM EDT (515 
 FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN NORTH FLORIDA
 
   ...WAKULLA COUNTY
 
  AND FOR MARINE INTERESTS ON THE GULF COASTAL WATERS FROM THE
 
   ...ST. MARKS  TO  OCHLOCKONEE RIVER
 
AT 520 PM... DOPPLER RADAR SHOWED A SEVERE THUNDERSTORM OVER THE COAST
AND COASTAL WATERS BETWEEN THE OCHLOCKNEE BAY AND SHELL POINT. THIS
THUNDERSTORM WAS MOVING VERY SLOWLY AND WILL BRING STRONG DAMAGING WINDS
TO COASTAL AREAS AND AND VERY HIGH SEAS TO THE APALACHEE AND OCHLOCKNEE
BAY THROUGH AROUND 6PM.
 
SEVERE THUNDERSTORMS PRODUCE WINDS OF 50 KNOTS OR GREATER...
VERY ROUGH SEAS AND LIGHTNING.  YOUR BEST COURSE OF ACTION
IS BTO SEEK SAFE HARBOR...BUT IF YOU ARE CAUGHT ON THE OPEN WATER...
STAY BELOW DECK AND AWAY FROM UNGROUNDED METAL OBJECTS. MAKE SURE
YOU AND ALL YOUR CREW ARE WEARING FLOTATION DEVICES.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 8:35 PM EDTSevere Thunderstorm WarningTAEJefferson40 min
Jul 17, 7:09 AM EDTSevere Thunderstorm WarningTAETaylor66 min
Jul 17, 3:17 PM EDTSevere Thunderstorm WarningTAEHolmes43 min
Jul 17, 3:55 PM EDTSevere Thunderstorm WarningTAEWalton50 min
Jul 17, 5:28 PM EDTSevere Thunderstorm WarningTAELeon47 min
Jul 17, 6:19 PM EDTSevere Thunderstorm WarningTAELeon56 min

Nearby

Severe Thunderstorm Warnings in Florida, 1995Every severe thunderstorm warning in 1995

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; radar from the NEXRAD Level II archive.