Alert archive / Florida / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 1, NWS Melbourne, FL

February 21, 1989Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Feb 21, 1989, 3:25 PM EST for Volusia County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Feb 21, 1989, 3:25 PM EST (20:25 UTC)
Expired
Feb 21, 1989, 4:25 PM EST
In force
60 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Volusia 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, 8.4 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 1989-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 770 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 1989-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 square meters per square second.1939587897Sfc1 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
770 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
809 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 21, 3:00 PM ESTTornado WarningMLBMarion45 min
Feb 21, 4:45 PM ESTSevere Thunderstorm WarningMLBBrevard62 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.