Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 63, NWS Melbourne, FL

July 1, 1997Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 1, 1997, 4:24 PM EDT for Brevard County, Florida. It was in force for 46 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 1, 1997, 4:24 PM EDT (20:24 UTC)
Expired
Jul 1, 1997, 5:10 PM EDT
In force
46 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 21 km from the middle of the area, began a volume at 20:28 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.

What was reported inside it

TimeReportWhereRemark
Jul 1, 4:50 PM EDTHail 0.75Rockledge, FLDime size hail was reported in Rockledge and Titusville. Winds damaged the roof of a fire station in Rockledge.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.4 hours before the alert went out and 180 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, Tampa Bay, FL at 12:00Z on 1997-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1421 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, Tampa Bay, FL at 12:00Z on 1997-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
1421 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
73 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.

309 
WUUS01 KMLB 012024 RRA
SVRMLB
FLC009-FLZ501-012110-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
424 PM EDT TUE JUL 1 1997

THE NATIONAL WEATHER SERVICE IN MELBOURNE FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 510 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL FLORIDA

   ...BREVARD COUNTY
 
AT 420 PM...DOPPLER WEATHER RADAR INDICATED AN INTENSIFYING
THUNDERSTORM OVER CENTRAL BREVARD COUNTY JUST WEST OF COCOA. THIS
STORM WILL LIKELY BECOME SEVERE AND PRODUCE LARGE HAIL AND POSSIBLY
DAMAGING WINDS. THE STORM WILL MOVE TO COCOA AND COCOA BEACH AND MAY
DEVELOP FARTHER DOWN THE COAST TOWARD PATRICK AFB AND SATELLITE
BEACH. DIME SIZE HAIL HAS ALREADY BEEN REPORTED WITH THIS STORM.

SPRATT
 

&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 1, 4:24 PM EDTSevere Thunderstorm WarningMLBMartin46 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.