Alert archive / Florida / Severe Thunderstorm Warnings in 1993

Severe Thunderstorm Warning 7, NWS Key West, FL

April 5, 1993Monroe County, Florida

NWS Key West, FL issued this severe thunderstorm warning at Apr 5, 1993, 3:35 AM EDT for Monroe County, Florida. It was in force for 25 min.

The area

The counties it named.

The facts

Issued
Apr 5, 1993, 3:35 AM EDT (07:35 UTC)
Expired
Apr 5, 1993, 4:00 AM EDT
In force
25 min
Issued by
NWS Key West, FL
Area
Whole counties

County Monroe County, FL

The nearest sounding before it

Key West, FL (KEYW), launched 00:00Z, 7.6 hours before the alert went out and 137 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 00:00Z on 1993-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 1993-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KEYW 050756
SVREYW
FLC087-050800-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE KEY WEST FL
335 AM EDT MON APR 5 1993

THE NATIONAL WEATHER SERVICE IN KEY WEST HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
EFFECTIVE UNTIL 400 AM EDT
FOR PEOPLE IN THE FOLLOWING AREA...

IN SOUTH FLORIDA

...LOWER KEYS OF MONROE COUNTY FROM KEY WEST TO BAHIA HONDA...AND
THE ADJACENT COASTAL WATERS AND FLORIDA BAY...
A WIND GUST TO 50 KNOTS OR 58 MILES AN HOUR OCCURRED IN KEY WEST AT 334
AM EDT WITH A STRONG LINE OF SHOWERS AND THUNDERSTORMS MOVING QUICKLY
EAST.

DAMAGING THUNDERSTORM WINDS...DEADLY LIGHTNING STRIKES AND VERY HEAVY RAIN
CAN BE EXPECTED WITH THESE STORMS. FOR YOUR PROTECTION MOVE TO AN INTERIOR
ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUILDING. DO NOT USE YOUR TELEPHONE
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY.

BOATERS IN THE WARNED AREA SHOULD STEER CLEAR OF THESE STORM CONDITIONS AND
MOVE QUICKLY TO SAFE HARBOR IF POSSIBLE. BE PREPARED FOR DANGEROUS WINDS AND
ROUGH SEAS. ENSURE THAT ALL PERSONS ON BOARD ARE WEARING APPROVED PERSONAL
FLOTATION DEVICES.

WHEN SAFE...REPORT SEVERE WEATHER TO A LOCAL LAW ENPFORCEMENT AGENCY AND ASK
THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE AT KEY WEST.
STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST INFORMATION FROM THE
NATIONAL WEATHER SERVICE IN KEY WEST ON THIS WEATHER SITUATION.

/5

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 5, 3:55 AM EDTSevere Thunderstorm WarningKEYMonroe35 min

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.