Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 36, NWS Miami, FL

May 27, 1997Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 27, 1997, 11:00 PM EDT for Palm Beach County, Florida. It was in force for 55 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, 11:00 PM EDT (03:00 UTC)
Expired: May 27, 1997, 11:55 PM EDT
In force: 55 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 03:00 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, 3.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 280300 RRA
SVRMIA
FLC099-FLZ502-999-280355-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1100 PM EDT TUE MAY 27 1997

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 1155
PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHEAST FLORIDA

   ...NORTHERN AND  CENTRAL PALM BEACH COUNTY
 

AT 1050 PM A LINE OF THUNDERSTORMS EXTENDED FROM 10 MILES SOUTH OF
BELLE GLADE...ACROSS PAHOKEE AND INTO THE ATLANTIC ABOUT 15 MILES
SOUTH OF FORT PIERCE.  THE MOST INTENSE STORM IN THIS LINE WAS OVER
PAHOKEE.  THE STORMS HAVE INTENSIFIED OVER THE SOUTHERN PORTION OF
THE LINE AND SEVERE WEATHER WILL CONTINUE TO BE POSSIBLE OVER
NORTHERN PALM BEACH COUNTY THROUGH MIDNIGHT.  A SPECIAL MARINE
WARNING FOR THE ADJACENT COASTAL WATERS HAS BEEN EXTENDED UNTIL
MIDNIGHT.


SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 10:00 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	60 min
May 27, 10:32 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	58 min
May 28, 12:15 AM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	2 hr
May 28, 1:37 AM EDT	Severe Thunderstorm Warning	MFL	Broward	63 min
May 28, 5:45 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	60 min
May 28, 5:48 PM EDT	Tornado Warning	MFL	Miami-Dade	57 min
May 28, 6:42 PM EDT	Severe Thunderstorm Warning	MFL	Collier	63 min

Nearby

Severe Thunderstorm Warnings in Florida, 1997 Every 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.