Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 15, NWS Miami, FL

May 3, 1997Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 3, 1997, 4:56 PM EDT for Palm Beach County, Florida. It was in force for 64 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 3, 1997, 4:56 PM EDT (20:56 UTC)
Expired
May 3, 1997, 6:00 PM EDT
In force
64 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 20:58 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, 8.9 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 12:00Z on 1997-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1980 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 1997-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
1980 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
765 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
64 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 032059 RRA
SVRMIA
FLC099-032200-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
456 PM EDT SAT MAY 3 1997
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTHEAST FLORIDA
 
   ...PALM BEACH COUNTY
 
AT 453 PM MIAMI DOPPLER RADAR INDICATED A CLUSTER OF THUNDERSTORMS OVER
MUCH OF PALM BEACH COUNTY EXTENDING FROM 20 MILES EAST OF LAKE
OKEECHOBEE TO THE LOXAHATCHEE NATIONAL WILDLIFE REFUGE. THE STORMS WERE
MOVING EAST AT 15 MPH. THESE STORMS HAVE THE POTENTIAL OF PRODUCING
SEVERE WIND GUSTS AND LARGE HAIL...ALONG WITH LOCALLY VERY HEAVY RAIN.
 
DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVERE THUNDERSTORM. SEEK
SHELTER IN A STRONG BUILDING. STAY AWAY FROM WINDOWS. DO NOT USE
TELEPHONES OR ELECTRICAL APPLIANCES.
 
IF THREATENING WEATHER IS SIGHTED...TAKE SHELTER...THEN REPORT THE
SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

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

Local storm report, May 3, 4:39 PM EDT, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
439 PM EDT SAT MAY 03 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0330 PM    BUCKHEAD RIDGE            FL   TORNADO
05/03/97   GLADES                         *** 2 INJ ***
                                          5 HOMES WITH MODERATE
                                          DAMAGE. 2 MINOR INJURIES.
                                          SEVERAL ROADS BLOCKED BY
                                          DOWNED TREES. NUMEROUS
                                          POWER OUTAGES FROM DOWNED
                                          LINES. OCCURRED BETWEEN
                                          330 AND 400 PM.
Local storm report, May 3, 4:43 PM EDT, 13 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI, FL
439 PM EDT SAT MAY 03 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0330 PM    BUCKHEAD RIDGE            FL   TORNADO
05/03/97   GLADES                         *** 2 INJ ***
                                          5 HOMES WITH MODERATE
                                          DAMAGE. 2 MINOR INJURIES.
                                          SEVERAL ROADS BLOCKED BY
                                          DOWNED TREES. NUMEROUS
                                          POWER OUTAGES FROM DOWNED
                                          LINES. OCCURRED BETWEEN
                                          330 AND 400 PM.

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.