Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 111, NWS Tampa Bay, FL

June 19, 1998Hillsborough County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 19, 1998, 2:39 PM EDT for Hillsborough County, Florida. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 19, 1998, 2:39 PM EDT (18:39 UTC)
Expired
Jun 19, 1998, 3:10 PM EDT
In force
31 min
Issued by
NWS Tampa Bay, FL
Area
Whole counties

County Hillsborough County, FL

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 6.7 hours before the alert went out and 23 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 1998-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1631 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 1998-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
1631 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
1344 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
4 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.

NWS Tampa Bay, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 19, 9:31 AM EDT, 5 hours 8 minutes earlier.

Area forecast discussion, Jun 19, 9:31 AM EDT, 5 hours 8 minutes before
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In the hours before

Special weather statement, Jun 19, 10:45 AM EDT, 3 hours 54 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-192330-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1045 AM EDT FRI JUN 19 1998

...HEAT INDEX VALUES OF 105-110 EXPECTED THIS AFTERNOON...
...HIGH FIRE DANGER CONTINUES...
...WIDELY SCATTERED THUNDERSTORMS EXPECTED THIS AFTERNOON...

HIGH PRESSURE AT THE SURFACE AND ALOFT FIRMLY ENTRENCHED ACROSS THE
STATE WILL MAINTAIN HOT AND HUMID CONDITIONS ACROSS ALL OF WEST
CENTRAL AND SOUTHWEST FLORIDA THIS AFTERNOON...BUT WIDELY SCATTERED
THUNDERSTORMS MAY PROVIDE SOME TEMPORARY RELIEF ALONG WITH MUCH
NEEDED RAINFALL.

AFTERNOON TEMPERATURES WILL AGAIN SOAR INTO THE MIDDLE AND UPPER 90S
ALONG COASTAL AREAS WITH UPPER 90S TO NEAR 100 DEGREE READINGS OVER
THE INTERIOR. THE NEAR RECORD HEAT WILL AGAIN LEAD TO HIGH HEAT INDEX
VALUES...WITH "FEEL LIKE" TEMPERATURES OF BETWEEN 100 TO 105 DEGREES
ALONG COASTAL AREAS...AND 105 TO 110 DEGREES INLAND LOCALES. IF YOU
MUST BE OUTDOORS THIS AFTERNOON...DRINK AMPLE WATER...STAY OUT OF THE
SUN AS MUCH AS POSSIBLE...AND CURTAIL ANY PROLONGED STRENUOUS
ACTIVITY.

MUCH OF WEST CENTRAL FLORIDA REMAINS VERY DRY WITH VEGETATION PRONE
TO THE SPREAD OF WILDFIRE...SO BE EXTREMELY CAREFUL WITH ANY FIRE
SOURCE.

ENOUGH MOISTURE AND ADEQUATE INSTABILITY IN THE ATMOSPHERE ALONG WITH
THE DEVELOPMENT OF SEA BREEZES AND DAYTIME HEATING WILL RESULT IN
WIDELY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS...WITH THE BEST
PROSPECTS FOR THUNDERSTORMS OVER THE INTERIOR AND SOUTHWEST PENINSULA.
DEADLY LIGHTNING...GUSTY WINDS TO 35 MPH AND POSSIBLE HAIL WILL
ACCOMPANY LOCALLY STRONGER STORMS. IF THREATENING WEATHER APPROACHES
YOUR LOCATION MOVE 8INDOORS IMMEDIATELY.

MCMICHAEL
Special weather statement, Jun 19, 10:45 AM EDT, 3 hours 54 minutes before
FLZ039-042-043-048>052-055>057-060>062-065-192330-

WEST CENTRAL AND SOUTHWEST FLORIDA HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1045 AM EDT FRI JUN 19 1998

...HEAT INDEX VALUES OF 105-110 EXPECTED THIS AFTERNOON...
...HIGH FIRE DANGER CONTINUES...
...WIDELY SCATTERED THUNDERSTORMS EXPECTED THIS AFTERNOON...

HIGH PRESSURE AT THE SURFACE AND ALOFT FIRMLY ENTRENCHED ACROSS THE
STATE WILL MAINTAIN HOT AND HUMID CONDITIONS ACROSS ALL OF WEST
CENTRAL AND SOUTHWEST FLORIDA THIS AFTERNOON...BUT WIDELY SCATTERED
THUNDERSTORMS MAY PROVIDE SOME TEMPORARY RELIEF ALONG WITH MUCH
NEEDED RAINFALL.

AFTERNOON TEMPERATURES WILL AGAIN SOAR INTO THE MIDDLE AND UPPER 90S
ALONG COASTAL AREAS WITH UPPER 90S TO NEAR 100 DEGREE READINGS OVER
THE INTERIOR. THE NEAR RECORD HEAT WILL AGAIN LEAD TO HIGH HEAT INDEX
VALUES...WITH "FEEL LIKE" TEMPERATURES OF BETWEEN 100 TO 105 DEGREES
ALONG COASTAL AREAS...AND 105 TO 110 DEGREES INLAND LOCALES. IF YOU
MUST BE OUTDOORS THIS AFTERNOON...DRINK AMPLE WATER...STAY OUT OF THE
SUN AS MUCH AS POSSIBLE...AND CURTAIL ANY PROLONGED STRENUOUS
ACTIVITY.

MUCH OF WEST CENTRAL FLORIDA REMAINS VERY DRY WITH VEGETATION PRONE
TO THE SPREAD OF WILDFIRE...SO BE EXTREMELY CAREFUL WITH ANY FIRE
SOURCE.

ENOUGH MOISTURE AND ADEQUATE INSTABILITY IN THE ATMOSPHERE ALONG WITH
THE DEVELOPMENT OF SEA BREEZES AND DAYTIME HEATING WILL RESULT IN
WIDELY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS...WITH THE BEST
PROSPECTS FOR THUNDERSTORMS OVER THE INTERIOR AND SOUTHWEST PENINSULA.
DEADLY LIGHTNING...GUSTY WINDS TO 35 MPH AND POSSIBLE HAIL WILL
ACCOMPANY LOCALLY STRONGER STORMS. IF THREATENING WEATHER APPROACHES
YOUR LOCATION MOVE 8INDOORS IMMEDIATELY.

MCMICHAEL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 1:46 PM EDTSevere Thunderstorm WarningTBWHernando, Pasco34 min
Jun 19, 3:13 PM EDTSevere Thunderstorm WarningTBWHillsborough32 min
Jun 19, 3:13 PM EDTSevere Thunderstorm WarningTBWHillsborough47 min
Jun 19, 3:47 PM EDTSevere Thunderstorm WarningTBWPolk28 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning in 1998

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.