Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 13, NWS Miami, FL

February 6, 1998Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Feb 6, 1998, 8:34 PM EST for Collier County, Florida. It was in force for 76 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, 8:34 PM EST (01:34 UTC)
Expired
Feb 6, 1998, 9:50 PM EST
In force
76 min
Issued by
NWS Miami, FL
Area
Whole counties

County Collier County, FL

The radar

The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 01:37 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, 1.6 hours before the alert went out and 113 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.

000 
TTAA00 KMIA 070134 RRA
SVRMIA
FLC021-070250-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
834 PM EST FRI FEB 6 1998

THE NATIONAL WEATHER SERVICE IN MIAMI FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 950 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN FLORIDA

   ...COLLIER COUNTY

AT 830 PM EST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 40
MILES WEST OF EVERGLADES CITY OR 20 MILES WEST OF MARCO ISLAND
MOVING EAST AT 45 MPH.

SOME LOCATIONS NEAR THE PATH OF THIS STORM ARE...
  MARCO ISLAND                   BY ABOUT 850 PM EST
  CAPE ROMANO                    BY ABOUT 850 PM EST
  EVERGLADES CITY                BY ABOUT 910 PM EST
  OCHOPEE                        BY ABOUT 915 PM EST

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
Feb 6, 8:43 PM ESTSevere Thunderstorm WarningMFLGlades, Hendry77 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.