Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 86, NWS Miami, FL

August 7, 1998Glades County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 7, 1998, 2:45 PM EDT for Glades County, Florida. It was in force for 45 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
Aug 7, 1998, 2:45 PM EDT (18:45 UTC)
Expired
Aug 7, 1998, 3:30 PM EDT
In force
45 min
Issued by
NWS Miami, FL
Area
Whole counties

County Glades County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.8 hours before the alert went out and 146 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, Tampa Bay, FL at 12:00Z on 1998-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 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, Tampa Bay, FL at 12:00Z on 1998-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
49 J/kg
Mixed-layer CIN
-145 J/kg
Mixed-layer LCL
1119 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
22 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.

183 
WUUS1 KMIA 071846 RRA
SVRMIA
FLC043-071930-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
245 PM EDT FRI AUG 7 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GLADES COUNTY IN SOUTHERN FLORIDA

* UNTIL 330 PM EDT

* AT 242 PM EDT... DOPPLER RADAR INDICATED A DEVELOPING SEVERE
  THUNDERSTORM 7 MILES EAST OF PALMDALE AND JUST NORTH OF
  MOORE HAVEN MOVING NORTH AT 5 TO 10 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE...
  SPORTSMAN VILLAGE              BY ABOUT 250 PM EDT
  LAKEPORT                       BY ABOUT 305 PM EDT
  BUCKHEAD RIDGE AND BRIGHTON INDIAN RESERVATION ABOUT 330 PM EDT.

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.

WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A STRONG BUILDING.
DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL
APPLIANCES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED.
MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning in 1998

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.