Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 4, NWS Melbourne, FL

April 23, 1997Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 23, 1997, 11:10 AM EDT for Brevard County, Florida. It was in force for 60 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: Apr 23, 1997, 11:10 AM EDT (15:10 UTC)
Expired: Apr 23, 1997, 12:10 PM EDT
In force: 60 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 15:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 8:00 AM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 3.2 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-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: 2247 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 250 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 231510 RRA
SVRMLB
FLC009-231610-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1110 AM EDT WED APR 23 1997

THE NATIONAL WEATHER SERVICE IN MELBOURNE FL HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1210 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL FLORIDA

   ...NORTHERN BREVARD COUNTY
 
AT 1108 AM...DOPPLER WEATHER RADAR AT MELBOURNE INDICATED A LINE OF
SEVERE THUNDERSTORMS FROM CENTRAL VOLUSIA COUNTY TO EASTERN SEMINOLE
AND ORANGE COUNTIES. THESE STORMS WILL MOVE NORTHEAST AT 35 MPH AND
MOVE INTO NORTHERN BREVARD COUNTY AFTER 1125 AM AND AFFECT AREAS FROM
ABOUT TITUSVILLE NORTHWARD THROUGH 12 NOON. DAMAGING WINDS AND LARGE
HAIL ARE LIKELY WITH THESE STORMS. SEEK SHELTER NOW!

DAMAGING TORNADOES HAVE ALREADY OCCURRED ACROSS LAKE AND VOLUSIA
COUNTIES EARLIER TODAY. A TORNADO WATCH REMAINS IN EFFECT FOR
BREVARD COUNTY. TORNADOES MAY DEVELOP WITH LITTLE ADVANCE NOTICE.

SPRATT
 

&

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 8:40 AM EDT	Tornado Warning	MLB	Volusia	45 min
Apr 23, 9:22 AM EDT	Tornado Warning	MLB	Volusia	33 min
Apr 23, 9:43 AM EDT	Severe Thunderstorm Warning	MLB	Volusia	62 min
Apr 23, 9:56 AM EDT	Severe Thunderstorm Warning	MLB	Lake	94 min
Apr 23, 10:10 AM EDT	Tornado Warning	MLB	Volusia	45 min
Apr 23, 10:17 AM EDT	Tornado Warning	MLB	Lake, Orange	63 min
Apr 23, 10:29 AM EDT	Tornado Warning	MLB	Volusia	66 min
Apr 23, 10:38 AM EDT	Tornado Warning	MLB	Seminole	57 min
Apr 23, 11:22 AM EDT	Severe Thunderstorm Warning	MLB	Orange, Seminole	28 min
Apr 23, 11:44 AM EDT	Tornado Warning	MLB	Orange	61 min
Apr 23, 11:52 AM EDT	Severe Thunderstorm Warning	MLB	Osceola	63 min
Apr 23, 12:27 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	58 min
Apr 23, 12:51 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Osceola	64 min
Apr 23, 1:20 PM EDT	Tornado Warning	MLB	Indian River	50 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.