Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 80, NWS Miami, FL

June 22, 1999Hendry County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 22, 1999, 6:53 PM EDT for Hendry County, Florida. It was in force for 42 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
Jun 22, 1999, 6:53 PM EDT (22:53 UTC)
Expired
Jun 22, 1999, 7:35 PM EDT
In force
42 min
Issued by
NWS Miami, FL
Area
Whole counties

County Hendry County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 10.9 hours before the alert went out and 120 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, Miami, FL at 12:00Z on 1999-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1148 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, Miami, FL at 12:00Z on 1999-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 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
1148 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
953 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
33 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 222254 RRA
SVRMIA
FLC051-222335-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
653 PM EDT TUE JUN 22 1999

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HENDRY COUNTY IN SOUTHERN FLORIDA

* UNTIL 735 PM EDT

* AT 650 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHWEST OF CLEWISTON EXTENDING
  EASTWARD INTO LAKE OKEECHOBEE. THE STORM WAS MOVING SLOWLY SOUTH.
  THE STORM WILL AFFECT AREAS OF NORTHEAST HENDRY COUNTY...
  PARTICULARLY IN AND AROUND CLEWISTON. RESIDENTS IN THE AREA SHOULD
  MOVE INDOORS TO A SAFE PLACE UNTIL THE STORMS HAVE PASSED. BOATERS
  SHOULD NOT VENTURE OUT ONTO THE LAKE.


SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. SEEK SHELTER
IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE TELEPHONES
OR ELECTRICAL APPLIANCES.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 4:48 PM EDTSevere Thunderstorm WarningMFLBroward47 min

Nearby

Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning 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.