Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 21, NWS Miami, FL

July 9, 1993Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 9, 1993, 4:27 PM EDT for Collier County, Florida. It was in force for 63 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1993, 4:27 PM EDT (20:27 UTC)
Expired
Jul 9, 1993, 5:30 PM EDT
In force
63 min
Issued by
NWS Miami, FL
Area
Whole counties

County Collier County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 8.5 hours before the alert went out and 174 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, Key West, FL at 12:00Z on 1993-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2853 joules per kilogram.LCLEL10008507005003002001001 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, Key West, FL at 12:00Z on 1993-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 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
2853 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
785 m above ground
0-6 km bulk shear
1 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
-20 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 KMIA 092039
SVRMIA
FLC021-092130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
427 PM EDT FRI JUL 9 1993

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......

IN SOUTHWEST FLORIDA

   ...NORTHWESTERN COLLIER COUNTY

NATIONAL WEATHER SERVICE RADAR IN MIAMI INDICATES THE POSSIBILITY OF
A SEVERE THUNDERSTORM OVER EXTREME NORTHWEST COLLIER COUNTY AFFECTING
THE COMMUNITIES OF NAPLES...GOLDEN GATE AND BONITA SPRINGS DURING THE
NEXT HOUR. THIS THUNDERSTORM IS MOVING TOWARD THE WEST AT ABOUT 10 MPH.
DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING
ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK SHELTER IN A STRONG
BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR
ELECTRICAL APPLIANCES. A MOBILE HOME IS NOT A SAFE REFUGE FROM A
SEVERE THUNDERSTORM...MOVE TO A MORE SUBSTANTIAL BUILDING.

THUNDERSTORMS THREATEN BOATER SAFETY WITH GUSTY WINDS OF 35 KNOTS
OR GREATER...ROUGH SEAS AND LIGHTNING.  YOUR BEST COURSE OF ACTION
IS TO 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.

Nearby

Severe Thunderstorm Warnings in Florida, 1993Every severe thunderstorm warning in 1993

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.