Alert archive / Florida / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 12, NWS Melbourne, FL

May 1, 1989Marion County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 1, 1989, 2:14 PM EDT for Marion County, Florida. It was in force for 61 min.

The area

The counties it named.

The facts

Issued
May 1, 1989, 2:14 PM EDT (18:14 UTC)
Expired
May 1, 1989, 3:15 PM EDT
In force
61 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Marion 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

Jacksonville, FL (KAYS), launched 12:00Z, 6.2 hours before the alert went out and 148 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 1989-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 704 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 1989-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 57 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
704 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
704 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
57 m²/s²
0-3 km storm-relative helicity
66 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, May 1, 2:03 PM EDT, 11 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ORLANDO FL
200 PM EDT MON MAY 01 1989

            ...TORNADO WATCH FOR LAKE COUNTY...

THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A TORNADO
WATCH FOR PARTS OF CENTRAL FLORIDA...INCLUDING LAKE COUNTY...FROM
200PM EDT THIS MONDAY AFTERNOON UNTIL 700PM EDT THIS EVENING.

TORNADOES...LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING
THUNDERSTORM WINDS ARE POSSIBLE.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
May 1, 3:38 PM EDTSevere Thunderstorm WarningMLBVolusia67 min

Nearby

Severe Thunderstorm Warnings in Florida, 1989Every severe thunderstorm warning in 1989

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.