Alert archive / Florida / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 7, NWS Miami, FL

June 10, 1989Hendry County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 10, 1989, 6:42 PM EDT for Hendry County, Florida. It was in force for 33 min.

The area

The counties it named.

The facts

Issued
Jun 10, 1989, 6:42 PM EDT (22:42 UTC)
Expired
Jun 10, 1989, 7:15 PM EDT
In force
33 min
Issued by
NWS Miami, FL
Area
Whole counties

County Hendry 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

Tampa Bay, FL (KTBW), launched 12:00Z, 10.7 hours before the alert went out and 177 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, Tampa Bay, FL at 12:00Z on 1989-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1746 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, Tampa Bay, FL at 12:00Z on 1989-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 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
1746 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMIA 102242
SVRMIA
FLC051-102315-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
642 PM EDT SAT JUN 10 1989
 
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH FLORIDA
          ...NORTHWESTERN HENDRY
 
AT 635 PM RADAR INDICATED A SEVERE THUNDERSTORM JUST SOUTH OF DENAUD
AND LA BELLE IN HENDRY COUNTY. THIS THUNDERSTORM HAS JUST REACHED ITS
PEAK STRENGTH AND RESIDENTS OF DENAUD HAVE THE GREATEST POTENTIAL FOR
DAMAGE FROM THIS STORM.
 
 
SEEK SHELTER FROM THIS THUNDERSTORM IN A STRONG BUILDING. DAMAGING
WIND..HAIL..VERY HEAVY RAIN..AND DEADLJY LIGHTNING ARE ALL POSSIBLE
IN THIS THUNDERSTORM. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES
AND STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 10, 5:41 PM EDT, 1 hour 1 minute before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE MIAMI FL
540 PM EDT SAT JUN 10 1989

...THUNDERSTORMS DEVELOPING OVER NORTHERN COLLIER COUNTY...

AT 528 PM RADAR INDICATED A CLUSTER OF THUNDERSTORMS THAT WERE
PRODUCING VERY HEAVY RAIN FROM EAST OF BONITA SPRINGS TO IMMOKALEE.
IN ADDITION TO THE HEAVY RAIN FREQUENT LIGHTNING AND BRIEFLY STRONG
AND GUSTY WINDS WILL OCCUR.

ELSEWHERE...SCATTERED SHOWERS AND A FEW THUNDERSTORMS WITH VERY
HEAVY RAIN WERE ALONG THE WEST COAST SEA BREEZE FROM NORTH OF
FT MYERS TO SOUTH OF EVERGLADES CITY...AND ALONG THE EAST COAST SEA
BREEZE FROM THE EAST SIDE OF LAKE OKEECHOBEE TO WEST OF VERO BEACH.

MOVEMENT WAS SLOWLY NORTH AT LESS THAN 10 MILES AN HOUR.

AN ISOLATED SHOWER MOVING WEST AT 10 MILES AN HOUR WAS OVER THE
FLORIDA STRAITS OFFSHORE ANDROS ISLAND.
Special weather statement, Jun 10, 6:24 PM EDT, 18 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
624 PM EDT SAT JUN 10 1989

...THUNDERSTORMS OVER GLADES AND HENDRY COUNTIES...

SEVERAL THUNDERSTORMS HAVE BEEN MOVING SLOWLY NORTHWARD THROUGH
CENTRAL COLLIER AND WESTERN HENDRY COUNTIES FOR THE LAST TWO
HOURS.  AT 605 PM A LARGE THUNDERSTORM WAS LOCATED OVER THE
HENDRY CORRECTION INSTITUTION.  THIS THUNDERSTORM WILL PRODUCE
VERY HEAVY RAIN AND FREQUENT LIGHTNING STRIKES AS WELL AS STRONG
GUSTY WINDS FOR THE NEXT HOUR AS IT MOVES NORTH.  ANOTHER
THUNDERSTORM NEAR IMMOKALEE IN COLLIER EXTENDS TO FELDA IN HENDRY
COUNTY. THIS THUNDERSTORM HAS ALSO BEEN PRODUCING HEAVY RAIN AND
FREQUENT LIGHTNING BUT SHOULD BE DECREASING RAPIDLY< IN STRENGTH
VERY SHORTLY.

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.