Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 60, NWS Miami, FL

June 19, 1997Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 19, 1997, 9:37 PM EDT for Palm Beach County, Florida. It was in force for 88 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
Jun 19, 1997, 9:37 PM EDT (01:37 UTC)
Expired
Jun 19, 1997, 11:05 PM EDT
In force
88 min
Issued by
NWS Miami, FL
Area
Whole counties

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 01:39 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 93 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 1997-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2092 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 1997-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
2092 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1121 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
11 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.

829 
WUUS1 KMIA 200138 RRA
SVRMIA
FLC099-200305-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
937 PM EDT THU JUN 19 1997

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1105 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST FLORIDA

   ...WESTERN PALM BEACH COUNTY

 
AT 931 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY MIAMI DOPPLER
RADAR 18 MILES NORTH NORTHWEST OF PAHOKEE MOVING EAST SOUTHEAST AT
11 MPH. THIS STORM IS EXPECTED TO MOVE INTO THE AREA OF
NORTHWESTERN PALM BEACH COUNTY JUST SOUTH OF PORT MAYACA AROUND
950 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
Jun 20, 12:11 AM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade64 min
Jun 20, 5:04 PM EDTSevere Thunderstorm WarningMFLMiami-Dade56 min
Jun 20, 5:47 PM EDTSevere Thunderstorm WarningMFLMonroe58 min
Jun 20, 6:51 PM EDTSevere Thunderstorm WarningMFLMonroe59 min
Jun 20, 7:53 PM EDTSevere Thunderstorm WarningMFLGlades62 min

Nearby

Severe Thunderstorm Warnings in Florida, 1997Every severe thunderstorm warning in 1997

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.