Alert archive / Florida / Tornado Warnings in 1990

Tornado Warning 8, NWS Melbourne, FL

November 9, 1990Seminole County, Florida

NWS Melbourne, FL issued this tornado warning at Nov 9, 1990, 4:29 PM EST for Seminole County, Florida. It was in force for 31 min.

The area

The counties it named.

The facts

Issued
Nov 9, 1990, 4:29 PM EST (21:29 UTC)
Expired
Nov 9, 1990, 5:00 PM EST
In force
31 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Seminole County, FL

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.5 hours before the alert went out and 77 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, Cape Canaveral, FL at 12:00Z on 1990-11-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 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, Cape Canaveral, FL at 12:00Z on 1990-11-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.193958Sfc1 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
114 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 092129
TORMLB
FLC117-092200-
 
BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
429 PM EST FRI NOV 9 1990
 
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
TORNADO WARNING EFFECTIVE UNTIL  500 PM EST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN CENTRAL FLORIDA
 
   ...SEMINOLE COUNTY
 
A TORNADO WAS REPORTED IN MAITLAND AND EATONVILLE AT 415 PM . THIS
TORNADO WAS MOVING NORTH AT OVER 30 MILES PER HOURS AND WILL REACH THE
SANFORD AREA WITHIN A FEW MINUTES.
 
IF YOU ARE IN THE PATH OF THIS STORM...GO TO A SAFE PLACE IMMEDIATELY.
 
 
DO NOT TRY TO OUTRUN A TORNADO IN YOUR CAR.  CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS.  IF YOU ARE CAUGHT IN THE PATH OF
A TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING.  IF NO
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 9, 4:58 PM ESTTornado WarningMLBVolusia47 min

Nearby

Tornado Warnings in Florida, 1990Every tornado warning in 1990Tornadoes in 1990

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.