Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 14, NWS Miami, FL

February 6, 1998Glades County, Hendry County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 6, 1998, 8:43 PM EST for Glades County, Hendry County, Florida. It was in force for 77 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
Feb 6, 1998, 8:43 PM EST (01:43 UTC)
Expired
Feb 6, 1998, 10:00 PM EST
In force
77 min
Issued by
NWS Miami, FL
Area
Whole counties

Counties Glades County, FL, Hendry County, FL

The radar

The Miami radar (KAMX), 148 km from the middle of the area, began a volume at 01:47 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

Miami, FL (KMFL), launched 00:00Z, 1.7 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, Miami, FL at 00:00Z on 1998-02-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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 00:00Z on 1998-02-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.1939587897117Sfc1 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
9 J/kg
Mixed-layer CIN
-215 J/kg
Mixed-layer LCL
1367 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
119 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

291 
WUUS1 KMIA 070144 RRA
SVRMIA
AMZ610-FLC043-051-070300-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
843 PM EST FRI FEB 6 1998

THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1000 PM EST
AND A SPECIAL MARINE WARNING EFFECTIVE UNTIL 1000 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHERN FLORIDA

   ...HENDRY COUNTY
   ...GLADES COUNTY

AND BOATERS ON

LAKE OKEECHOBEE

AT 846 PM EST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
JUST SOUTHWEST OF LABELLE AND ANOTHER JUST SOUTH OF LAKEPORT.
MOVEMENT WILL BE NORTHEAST AT 40 MPH.

PEOPLE IN THE PATH OF THESE STORMS SHOULD TAKE COVER UNTIL THEY
PASS.

BOATERS SHOULD SEEK SAFE HARBOR IMMEDIATELY AND REMAIN IN PORT
UNTIL THESE THUNDERSTORMS PASS BEYOND THE COASTAL WATERS.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 6, 8:34 PM ESTSevere Thunderstorm WarningMFLCollier76 min
Feb 6, 9:06 PM ESTTornado WarningMFLCollier49 min
Feb 6, 9:35 PM ESTSevere Thunderstorm WarningMFLPalm Beach60 min
Feb 6, 10:14 PM ESTSevere Thunderstorm WarningMFLBroward61 min
Feb 6, 10:32 PM ESTSevere Thunderstorm WarningMFLPalm Beach43 min

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; radar from the NEXRAD Level II archive.