Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 61, NWS Miami, FL

July 2, 1998Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 2, 1998, 6:55 PM EDT for Collier County, Florida. It was in force for 60 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
Jul 2, 1998, 6:55 PM EDT (22:55 UTC)
Expired
Jul 2, 1998, 7:55 PM EDT
In force
60 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 22:58 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 12:00Z, 10.9 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 12:00Z on 1998-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1001 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 1998-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
1001 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
1428 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
-9 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 022255 RRA
SVRMIA
FLC021-022355-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
655 PM EDT THU JUL 2 1998

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN COLLIER COUNTY IN SOUTHWESTERN FLORIDA

* UNTIL 755 PM EDT

* AT 657 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  ABOUT 10 MILES EAST OF NAPLES. A REPORT OF GOLF BALL SIZED HAIL
  AND STRONG GUSTY WINDS SOUTH OF I-75 ALONG S.R. 951. LITTLE
  STORM MOVEMENT WAS NOTED BUT THE ACTIVITY WILL DEVELOP SLOWLY
  WEST TOWARD NAPLES.

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
Jul 2, 4:33 PM EDTSevere Thunderstorm WarningMFLGlades62 min
Jul 2, 5:36 PM EDTSevere Thunderstorm WarningMFLHendry64 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.