Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 72, NWS Miami, FL

May 22, 1999Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 22, 1999, 1:56 PM EDT for Collier County, Florida. It was in force for 49 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 22, 1999, 1:56 PM EDT (17:56 UTC)
Expired
May 22, 1999, 2:45 PM EDT
In force
49 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 17:58 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, 5.9 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 1999-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1433 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 1999-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
1433 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
822 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
-5 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 221754 RRA
SVRMIA
FLC021-221845-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
156 PM EDT SAT MAY 22 1999

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 245 PM EDT

* AT 154 PM EDT...MIAMI NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED A SEVERE THUNDERSTORM JUST NORTH OF MARCO ISLAND
  DRIFTING SOUTHWEST LESS THAN 10 MPH. A SECOND SEVERE THUNDERSTORM
  WAS INDICATED NEAR NAPLES SHOWING VERY LITTLE MOVEMENT. BOTH
  SEVERE THUNDERSTORMS WILL LIKELY PRODUCE LARGE HAIL.

* SOME LOCATIONS AFFECTED...
  NAPLES...EAST NAPLES...MARCO ISLAND

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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 22, 9:01 AM EDT, 4 hours 55 minutes before
FLZ063-066>075-212300-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK...UPDATE...
NATIONAL WEATHER SERVICE MIAMI FL
901 AM EDT SAT MAY 22 1999

A NARROW LINE OF SHOWERS MOVING INTO THE COASTAL WATERS OFF OF PALM
BEACH COUNTY MAY PRODUCE SOME WATERSPOUTS THIS MORNING.

OTHERWISE...SCATTERED SHOWERS AND THUNDERSTORMS WILL AGAIN DEVELOP
OVER SOUTH FLORIDA WITH MOST OF THE ACTIVITY OCCURRING DURING THE
AFTERNOON HOURS OVER THE INTERIOR SECTIONS AND OVER SOUTHWEST
COASTAL COUNTIES.

SOME OF THESE THUNDERSTORMS COULD PRODUCE DANGEROUS LIGHTNING...GUSTY
WINDS...AND HAIL.
Special weather statement, May 22, 9:01 AM EDT, 4 hours 55 minutes before
FLZ063-066>075-212300-

SOUTH FLORIDA HAZARDOUS WEATHER OUTLOOK...UPDATE...
NATIONAL WEATHER SERVICE MIAMI FL
901 AM EDT SAT MAY 22 1999

A NARROW LINE OF SHOWERS MOVING INTO THE COASTAL WATERS OFF OF PALM
BEACH COUNTY MAY PRODUCE SOME WATERSPOUTS THIS MORNING.

OTHERWISE...SCATTERED SHOWERS AND THUNDERSTORMS WILL AGAIN DEVELOP
OVER SOUTH FLORIDA WITH MOST OF THE ACTIVITY OCCURRING DURING THE
AFTERNOON HOURS OVER THE INTERIOR SECTIONS AND OVER SOUTHWEST
COASTAL COUNTIES.

SOME OF THESE THUNDERSTORMS COULD PRODUCE DANGEROUS LIGHTNING...GUSTY
WINDS...AND HAIL.

The office that day

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

IssuedProductOfficeCountiesLasted
May 22, 2:47 PM EDTSevere Thunderstorm WarningMFLMiami-Dade, Monroe43 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.