Alert archive / Florida / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 33, NWS Jacksonville, FL

July 30, 1992Clay County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jul 30, 1992, 2:45 PM EDT for Clay County, Saint Johns County, Florida. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 30, 1992, 2:45 PM EDT (18:45 UTC)
Expired
Jul 30, 1992, 3:45 PM EDT
In force
60 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

Counties Clay County, FL, Saint Johns County, FL

The nearest sounding before it

Jacksonville, FL (KAYS), launched 12:00Z, 6.8 hours before the alert went out and 62 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 1992-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1793 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 1992-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
1793 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
909 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
24 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, Jul 30, 1:01 PM EDT, 1 hour 44 minutes before
FLC107-109-301900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1255 PM EDT THU JUL 30 1992

AT 1255 PM RADAR INDICATED STRONG THUNDERSTORMS IN PUTNAM COUNTY NEAR
INTERLACHEN EXTENDING SOUTH INTO MARION COUNTY. DURING THE PAST HOUR
REPORTS HAVE BE RECIEVED OF ESTIMATED WIND GUST TO 40 MPH IN THE
INTERLACHEN AREA. THE THUNDERSTORMS ARE MOVING TO THE EAST AT ABOUT 15
MPH.

THE THUNDERSTORMS WILL BE MOVING INTO THE PALATKA AREA AND SOUTHERN
ST JOHNS COUNTY DURING THE NEXT 1 TO 2 HOURS. THE THUNDERSTORMS WILL
BE ACCOMPANIED BY STRONG GUSTY WIND...HEAVY RAIN...FREQUENT LIGHTNING
STRIKES AND POSSIBLY SMALL HAIL.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 30, 3:26 PM EDTTornado WarningJAXDuval49 min
Jul 30, 3:52 PM EDTTornado WarningJAXClay, Duval53 min
Jul 30, 4:32 PM EDTSevere Thunderstorm WarningJAXDuval, Nassau58 min

Nearby

Severe Thunderstorm Warnings in Florida, 1992Every 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; the sounding from the Mesonet's radiosonde archive.