Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 21, NWS Melbourne, FL

March 6, 1992Lake County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 6, 1992, 4:38 PM EST for Lake County, Florida. It was in force for 52 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: Mar 6, 1992, 4:38 PM EST (21:38 UTC)
Expired: Mar 6, 1992, 5:30 PM EST
In force: 52 min
Issued by: NWS Melbourne, FL
Area: Whole counties

County Lake County, FL

The radar

The Melbourne radar (KMLB), 126 km from the middle of the area, began a volume at 21:41 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

Time	Report	Where	Remark
Mar 6, 4:40 PM EST	Hail 1.75	Lake, FL

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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 9.6 hours before the alert went out and 136 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: 466 J/kg
Mixed-layer CIN: -39 J/kg
Mixed-layer LCL: 737 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 115 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 062139
SVRMLB
FLC069-062230-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
438 PM EST FRI MAR 6 1992
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  530 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL FLORIDA
 
   ...NORTHEASTERN LAKE COUNTY
 
...A SEVERE THUNDERSTORM OVER NORTHEAST LAKE COUNTY...
 
AT 438 PM EST...WEATHER RADAR INDICATED A SEVERE THUNDERSTORM
OVER LAKE COUNTY NEAR MT DORA. THE STORM WAS MOVING EAST AT 20 MPH.
 
 
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 58 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE OR IN MOBILE HOMES SHOULD MOVE
INSIDE A STRONG BUILDING AND STAY AWAY FROM WINDOWS.

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 6, 4:45 PM EST	Severe Thunderstorm Warning	MLB	Brevard	45 min
Mar 6, 4:49 PM EST	Severe Thunderstorm Warning	MLB	Orange	41 min
Mar 6, 4:54 PM EST	Severe Thunderstorm Warning	MLB	Seminole	66 min
Mar 6, 5:32 PM EST	Severe Thunderstorm Warning	MLB	Orange	58 min
Mar 6, 5:43 PM EST	Tornado Warning	MLB	Orange	62 min
Mar 6, 6:18 PM EST	Severe Thunderstorm Warning	MLB	Brevard, Indian River	42 min

Nearby

Severe Thunderstorm Warnings in Florida, 1992 Every severe thunderstorm warning in 1992

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.