Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 68, NWS Melbourne, FL

July 5, 1997Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 5, 1997, 2:50 PM EDT for Volusia County, Florida. It was in force for 50 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
Jul 5, 1997, 2:50 PM EDT (18:50 UTC)
Expired
Jul 5, 1997, 3:40 PM EDT
In force
50 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 18:51 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

Jacksonville, FL (KJAX), launched 12:00Z, 6.8 hours before the alert went out and 168 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, Jacksonville, FL at 12:00Z on 1997-07-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3275 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, Jacksonville, FL at 12:00Z on 1997-07-05The 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
3275 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
870 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
52 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 KMLB 051850 RRA
SVRMLB
FLC127-051940-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
250 PM EDT SAT JUL 5 1997

THE NATIONAL WEATHER SERVICE IN MELBOURNE FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 340 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL FLORIDA

   ...NORTHERN VOLUSIA COUNTY
 
AT 250PM DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM EXTENDING
FROM JUST SOUTH OF FLAGLER BEACH TO ORMOND BEACH.  THIS STORM IS
SHOWING LITTLE MOVEMENT.  THIS STORM WILL BE CAPABLE OF PRODUCING
STRONG AND DAMAGING WINDS AND HAIL THROUGH 330PM.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 5, 1:11 PM EDTSevere Thunderstorm WarningMLBOkeechobee49 min
Jul 5, 2:10 PM EDTSevere Thunderstorm WarningMLBBrevard60 min
Jul 5, 2:27 PM EDTSevere Thunderstorm WarningMLBOsceola63 min
Jul 5, 4:20 PM EDTSevere Thunderstorm WarningMLBMartin45 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.