Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 76, NWS Miami, FL

May 29, 1999Glades County, Hendry County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 29, 1999, 6:12 PM EDT for Glades County, Hendry County, Florida. It was in force for 63 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
May 29, 1999, 6:12 PM EDT (22:12 UTC)
Expired
May 29, 1999, 7:15 PM EDT
In force
63 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 22:14 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, 10.2 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 12:00Z on 1999-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 463 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 1999-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.193958Sfc1 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
463 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1128 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

999 
WUUS1 KMIA 292213 RRA
SVRMIA
FLC043-051-292315-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
612 PM EDT SAT MAY 29 1999

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN HENDRY COUNTY IN SOUTHERN FLORIDA
  SOUTHERN GLADES COUNTY IN SOUTHERN FLORIDA

* UNTIL 715 PM EDT

* AT 610 PM MIAMI DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS ACROSS CENTRAL HENDRY COUNTY TO THE GLADES..HENDRY
  COUNTY BORDER MOVING NORTHEAST AT 5 TO 10 MPH. THE LINE WILL
  PRODUCE WINDS IN EXCESS OF 50 MPH..VERY HEAVY RAINFALL..AND LARGE
  HAIL. THESE STORMS WILL MOVE INTO SOUTHERN GLADES COUNTY BY 630 PM
  AND LAKE OKEECHOBEE BY 645 PM.



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
May 29, 5:05 PM EDTSevere Thunderstorm WarningMFLMiami-Dade60 min
May 29, 6:03 PM EDTSevere Thunderstorm WarningMFLMiami-Dade62 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; radar from the NEXRAD Level II archive.