Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 130, NWS Miami, FL

August 8, 1997Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Aug 8, 1997, 4:50 PM EDT for Broward County, 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
Aug 8, 1997, 4:50 PM EDT (20:50 UTC)
Expired
Aug 8, 1997, 5:45 PM EDT
In force
55 min
Issued by
NWS Miami, FL
Area
Whole counties

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 88 km from the middle of the area, began a volume at 20:49 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, 8.8 hours before the alert went out and 66 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 1997-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2428 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 1997-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 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
2428 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
712 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
16 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 082052 RRA
SVRMIA
FLC011-099-082145-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
450 PM EDT FRI AUG 8 1997
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...S...
 
IN SOUTHEAST FLORIDA
 
   ...NORTHEASTERN BROWARD COUNTY...SOUTHERN PALM BEACH COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
 
NATIONAL WEATHER SERVICE RADAR INDICATES THUNDERSTORMS WHICH
LIKELY WILL BECOME SEVERE AND AFFECT NORTHEAST BROWARD COUNTY
...INCLUDING A SECTION OF THE NORTHERN PART OF METROPOLITAN
BROWARD. OTHER STORMS SPREADING OVER MUCH OF SOUTHERN PALM BEACH
COUNTY ALSO WILL LIKELY BECOME SEVERE.
 
THE BROWARD STORM WILL MAINLY AFFECT A SMALL AREA ALONG THE
SAWGRASS NEAR CORAL SPRINGS...PARKLAND AND MARGATE.
 
IN PALM BEACH COUNTY STORMS WILL DEVELOP EAST OVER THE SOUTHERN
PART OF THE COUNTY FROM AGRICULTURAL AREAS WEST OF HIGHWAY 27...
SPREADING EAST ACROSS HIGHWAY 27 AND OVER TO AREAS AROUND
BOYNTON BEACH...DEL RAY BEACH..AND BOCA RATON.
 
 
DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN A SEVE6RE THUNDERSTORM.
BOATERS ON THE COASTAL WATERS SHOULD GO TO SAFE HARBOR.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 3:36 PM EDTSevere Thunderstorm WarningMFLBroward69 min
Aug 8, 4:15 PM EDTSevere Thunderstorm WarningMFLMiami-Dade60 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.