Alert archive / Georgia / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 14, NWS Jacksonville, FL

April 28, 1990Jeff Davis County, Georgia

NWS Jacksonville, FL issued this severe thunderstorm warning at Apr 28, 1990, 7:24 PM EDT for Jeff Davis County, Georgia. It was in force for 66 min.

The area

The counties it named.

The facts

Issued
Apr 28, 1990, 7:24 PM EDT (23:24 UTC)
Expired
Apr 28, 1990, 8:30 PM EDT
In force
66 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

County Jeff Davis County, GA

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, 11.4 hours before the alert went out and 170 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 1990-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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 1990-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 square meters per square second.19395878Sfc1 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
9 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
866 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, Apr 28, 2:17 PM EDT, 5 hours 7 minutes before
FLZ007-008-009-281830

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
216 PM EDT SAT APR 28 1990

             ...TORNADO WATCH NUMBER 175  IS IN EFFECT FOR PERSONS
IN ALACHUA...BRADFORD...CLAY...DUVAL...NASSAU...LAFAYETTE...
GILCHRIST...SUWANNEE...HAMILTON...COLUMBIA...UNION...BAKER COUNTIES OF
FLORIDA UNTIL 6PM EDT.

AT 215 PM EDT WEATHER RADAR INDICATED THUNDERSTORMS MOVING INTO NORTHWEST
NASSAU COUNTY...WESTERN DUVAL...TO JUST WEST OF GAINESVILLE.
THE STRONGEST STORMS WERE MOVING THROUGH NORTHWEST NASSAU COUNTY WHERE
STRONG GUSTY WINDS...FREQUENT LIGHTNING...HEAVY RAIN...AND HAIL ARE LIKLEY
THE NEXT HALF HOUR.  THUNDERSTORMS SHOULD BE MOVING THROUGH JACKSONVI5LLE
WITHIN THE HOUR.

STAY TUNED FOR FURTHER STATEMENTS OR WARNINGS.
Special weather statement, Apr 28, 3:31 PM EDT, 3 hours 53 minutes before
FLZ007-008-009-282030

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
328 PM EDT SAT APR 28 1990

             ...TORNADO WATCH NUMBER 175  IS IN EFFECT FOR PERSONS
IN ALACHUA...BRADFORD...CLAY...DUVAL...NASSAU...LAFAYETTE...
GILCHRIST...SUWANNEE...HAMILTON...COLUMBIA...UNION...BAKER COUNTIES OF
FLORIDA AND THE ADJACENT COASTAL WATERS UNTIL 6PM EDT.

AT 325 PM EDT WEATHER RADAR INDICATED THUNDERSTORMS OCCURRING FROM JUST
SOUTH OF ST SIMONS ISLAND GEORGIA TO JACKSONVILLE AND FURTHER
SOUTHWEST TO CECIL AND GAINESVILLE.  THE STRONGEST STORMS WERE
OCCURRING JUST SOUTH OF CECIL AND NEAR KINGSLEY LAKE IN CLAY COUNTY.
THE STORMS ARE MOVING TO THE NORTHEAST AT 30 MILES AN HOUR AND WILL
LIKELY PRODUCE STRONG GUSTY WINDS...DANGEROUS LIGHTNING...HEAVY RAIN...
AND POSSIBLE HAIL AS THEY MOVE THROUGH THE AREA THE NEXT COUPLE OF HOURS.

SO FAR NO SEVERE WEATHER HAS BEEN REPORTED TO THE WEATHER OFFICE...
HOWEVER PERSONS IN AND CLOSE TO THE WATCH AREA ARE URGED TO STAY TUNED
AND KEEP ABREAST OF THE SITUATION AND BE PREPARED TO ACT QUICKLY
IF A WARNING IS ISSUED.

MARINE INTERSTS OPERATING IN THE COASTAL WATERS FROM AMELIA ISLAND
TO ST AUGUSTINE SHOULD BE ALERT FORz THREATENING WEATHER AND BE PREPARED
TO SEEK SAFE HARBOUR AS THESE THUNDERSTORMS WILL MOVE OFFSHORE THE NEXT
SEVERAL HOURS.
Special weather statement, Apr 28, 6:14 PM EDT, 1 hour 10 minutes before
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Special weather statement, Apr 28, 7:05 PM EDT, 19 minutes before
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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 1:29 PM EDTSevere Thunderstorm WarningJAXBaker46 min
Apr 28, 3:58 PM EDTSevere Thunderstorm WarningJAXClay47 min
Apr 28, 4:56 PM EDTSevere Thunderstorm WarningJAXPutnam34 min

Nearby

Severe Thunderstorm Warnings in Georgia, 1990Every severe thunderstorm warning 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.