Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 33, NWS Miami, FL

May 27, 1997Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 27, 1997, 10:32 PM EDT for Palm Beach County, Florida. It was in force for 58 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 27, 1997, 10:32 PM EDT (02:32 UTC)
Expired
May 27, 1997, 11:30 PM EDT
In force
58 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 02:31 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, 2.5 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 1997-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2965 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 1997-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 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
2965 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
956 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 280232 RRA
SVRMIA
FLC099-FLZ502-999-280330-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1032 PM EDT TUE MAY 27 1997

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1130 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST FLORIDA

   ...NORTHERN PALM BEACH COUNTY
 
AT 1027 PM EDT...A SEVERE THUNDERSTORM WAS INDICATED BY MIAMI DOPPLER
RADAR 4 MILES NORTHWEST OF SAND CUT OR 10 MILES NORTH OF
PAHOKEE MOVING EAST AT 17 MPH.

SOME LOCATIONS IN THE PATH OF THIS STORM ARE...SAND CUT...PORT
MAYACA AND PAHOKEE.

WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A STRONG BUILDING. DO
NOT STAND BY WINlDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES
UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD
NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 10:00 PM EDTSevere Thunderstorm WarningMFLPalm Beach60 min
May 27, 11:00 PM EDTSevere Thunderstorm WarningMFLPalm Beach55 min
May 28, 12:15 AM EDTSevere Thunderstorm WarningMFLMiami-Dade2 hr
May 28, 1:37 AM EDTSevere Thunderstorm WarningMFLBroward63 min
May 28, 5:45 PM EDTSevere Thunderstorm WarningMFLMiami-Dade60 min
May 28, 5:48 PM EDTTornado WarningMFLMiami-Dade57 min
May 28, 6:42 PM EDTSevere Thunderstorm WarningMFLCollier63 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.