Alert archive / Florida / Severe Thunderstorm Warnings in 1988

Severe Thunderstorm Warning 21, NWS Jacksonville, FL

June 27, 1988Clay County, Saint Johns County, Florida

NWS Jacksonville, FL issued this severe thunderstorm warning at Jun 27, 1988, 8:33 PM EDT for Clay County, Saint Johns County, Florida. It was in force for 42 min.

The area

The counties it named.

The facts

Issued
Jun 27, 1988, 8:33 PM EDT (00:33 UTC)
Expired
Jun 27, 1988, 9:15 PM EDT
In force
42 min
Issued by
NWS Jacksonville, FL
Area
Whole counties

Counties Clay County, FL, Saint Johns 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 00:00Z, 0.6 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 00:00Z on 1988-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3431 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 00:00Z on 1988-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
3431 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
749 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
131 m²/s²
Significant tornado parameter
1.1
Supercell composite
6.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KJAX 280035
SVRJAX
FLC019-109-280115-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSONVILLE FL
833 PM EDT MON JUN 27 1988
 
THE NATIONAL WEATHER SERVICE IN JACKSONVILLE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  915 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN NORTH FLORIDA
          ...CLAY...ST.JOHNS
 
AT 832 PM EDT A SEVERE THUNDERSTORM WAS NEAR ORANGE PARK EXTENDING TO
NEAR THE COAST TO SOUTH PONTE VEDRA BEACH. THIS STORM WAS MOVING
SOUTHEAST AT 20 MPH.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.

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, Jun 27, 5:02 PM EDT, 3 hours 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
500 PM EDT MON JUN 27 1988

...SEVERE THUNDERSTORM WATCH NUMBER 252 CONTINUES FOR NORTHEAST
FLORIDA IN THE FOLLOWING COUNTIES...ALACHUA..BAKER..BRADFORD..
CLAY..COLUMBIA..DUVAL..GILCHRIST..HAMILTON..LAFAYETTE..NASSAU..
PUTNAM..ST JOHNS..SUWANNEE..AND UNION. THIS WATCH IS ALSO IN EFFECT
FOR THE ADJACENT COASTAL WATERS...

ALTHOUGH NO SEVERE WEATHER HAS OCCURRED IN NORTHEAST FLORIDA...
THUNDERSTORMS HAVE BEEN VERY ACTIVE IN SOUTH GEORGIA FROM NEAR ALBANY
ALBANY TO NEAR ALMA. THEY ARE MOVING SOUTHEAST AT 25 MPH.

OTHER SHOWERS AND THUNDERSTORMS WERE SOUTHEAST AND SOUTHWEST OF
VALDOSTA GEORGIA.

PERSONS IN OR CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED
TO BE ON THE ALERT FOR LOCAL WEATHER DEVELOPMENTS AND FOR LATER
STATEMENTS OR POSSIBLE WARNINGS.

MARINE INTERESTS ARE ADVISED NOT TO GO TOO FAR FROM PORT UNTIL THE
THREAT OF SEVERE THUNDERSTORMS HAS DECREASED.
Special weather statement, Jun 27, 6:11 PM EDT, 2 hours 22 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
610 PM EDT MON JUN 27 1988

...SEVERE THUNDERSTORM WATCH NUMBER 252 CONTINUES FOR NORTHEAST
FLORIDA IN THE FOLLOWING COUNTIES...ALACHUA..BAKER..BRADFORD..
CLAY..COLUMBIA..DUVAL..GILCHRIST..HAMILTON..LAFAYETTE..NASSAU..
PUTNAM..ST JOHNS..SUWANNEE..AND UNION. THIS WATCH IS ALSO IN EFFECT
FOR THE ADJACENT COASTAL WATERS...

VERY STRONG THUNDERSTORMS WERE SCATTERED ALONG THE FLORIDA-GEORGIA
BORDER NEAR BELLVILLE IN HAMILTON COUNTY EAST TO THE COAST NEAR
FERNANDINA BEACH. THEY WERE MOVING SOUTHEAST AT 25 MPH.

PERSONS IN OR CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED
TO BE ON THE ALERT FOR LOCAL WEATHER DEVELOPMENTS AND FOR LATER
STATEMENTS OR POSSIBLE WARNINGS.

MARINE INTERESTS ARE ADVISED NOT TO GO TOO FAR FROM PORT UNTIL THE
THREAT OF SEVERE THUNDERSTORMS HAS DECREASED WHICH WILL MOSTLY LIKELY
BE BY MIDNIGHT. AS THESE THUNDERSTORMS MOVE OFF THE C;OAST FROM
FERNANDINA BEACH SOUTH TO ST AUGUSTINE THIS EVENING...BUILDING SEAS..
POOR VISIBILITY..AND STRONG GUSTY WINDS CAN BE EXPECTED.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 9:28 PM EDTTornado WarningJAXSaint Johns32 min

Nearby

Severe Thunderstorm Warnings in Florida, 1988Every severe thunderstorm warning in 1988

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.