Alert archive / Florida / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 57, NWS Tampa Bay, FL

May 28, 1997Pasco County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at May 28, 1997, 4:18 PM EDT for Pasco County, Florida. It was in force for 32 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: May 28, 1997, 4:18 PM EDT (20:18 UTC)
Expired: May 28, 1997, 4:50 PM EDT
In force: 32 min
Issued by: NWS Tampa Bay, FL
Area: Whole counties

County Pasco County, FL

The radar

The Tampa radar (KTBW), 67 km from the middle of the area, began a volume at 20:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.3 hours before the alert went out and 67 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 458 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 2 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 May 28, 2:57 PM EDT, 1 hour 21 minutes earlier.

Area forecast discussion, May 28, 2:57 PM EDT, 1 hour 21 minutes before

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In the hours before

Special weather statement, May 28, 11:45 AM EDT, 4 hours 33 minutes before

FLZ039-042-043-048>052-055>057-060>062-065-504-505-282000-
WEST CENTRAL AND SOUTHWEST FLORIDA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
1145 AM EDT WED MAY 28 1997

...A FEW STRONG THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

A STATIONARY FRONT ACROSS THE CENTRAL FLORIDA PENINSULA AND A
DEVELOPING AFTERNOON SEABREEZE WILL BE THE FOCUS FOR SHOWERS AND
THUNDERSTORMS TODAY.  THE ATMOSPHERE REMAINS UNSTABLE AND
THUNDERSTORMS ARE EXPECTED TO DEVELOP EARLY THIS AFTERNOON FROM
CRYSTAL RIVER TO TITUSVILLE AND WILL SPREAD SOUTH ACROSS MUCH OF THE
FORECAST AREA.

DAYTIME HEATING WILL INCREASE INSTABILITY...AND NUMEROUS BOUNDARY
COLLISIONS DUE TO THE SEABREEZE...THE FRONTAL BOUNDARY...AND OUTFLOWS
FROM THUNDERSTORMS...WILL CAUSE A FEW STORMS TO APPROACH SEVERE
LEVELS.   TODAYS STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL...
DAMAGING WINDS OF UP TO 50 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING.
RESIDENTS...ESPECIALLY MARINERS...SHOULD BE ALERT FOR RAPIDLY CHANGING
WEATHER CONDITIONS. EMERGENCY MANAGEMENT OFFICIALS AND STORM
SPOTTERS ARE ASKED TO REPORT ANY ADVERSE WEATHER TO THE NATIONAL
WEATHER SERVICE OFFICE IN RUSKIN FLORIDA.

STAY TUNED TO RADIO...NOAA WEATHER RADIO...TELEVISION...AND/OR CABLE
TELEVISION FOR THE LATEST WEATHER INFORMATION.

OGLESBY

Special weather statement, May 28, 11:52 AM EDT, 4 hours 26 minutes before

FLZ039-042-043-048>052-055>057-060>062-065-504-505-282000-
WEST CENTRAL AND SOUTHWEST FLORIDA THUNDERSTORM OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA RUSKIN FL
1145 AM EDT WED MAY 28 1997

...A FEW STRONG THUNDERSTORMS POSSIBLE THIS AFTERNOON AND EVENING...

A STATIONARY FRONT ACROSS THE CENTRAL FLORIDA PENINSULA AND A
DEVELOPING AFTERNOON SEABREEZE WILL BE THE FOCUS FOR SHOWERS AND
THUNDERSTORMS TODAY.  THE ATMOSPHERE REMAINS UNSTABLE AND
THUNDERSTORMS ARE EXPECTED TO DEVELOP EARLY THIS AFTERNOON FROM
CRYSTAL RIVER TO TITUSVILLE AND WILL SPREAD SOUTH ACROSS MUCH OF THE
FORECAST AREA.

DAYTIME HEATING WILL INCREASE INSTABILITY...AND NUMEROUS BOUNDARY
COLLISIONS DUE TO THE SEABREEZE...THE FRONTAL BOUNDARY...AND OUTFLOWS
FROM THUNDERSTORMS...WILL CAUSE A FEW STORMS TO APPROACH SEVERE
LEVELS.   TODAYS STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL...
DAMAGING WINDS OF UP TO 50 MPH...AND FREQUENT CLOUD TO GROUND
LIGHTNING.
RESIDENTS...ESPECIALLY MARINERS...SHOULD BE ALERT FOR RAPIDLY CHANGING
WEATHER CONDITIONS. EMERGENCY MANAGEMENT OFFICIALS AND STORM
SPOTTERS ARE ASKED TO REPORT ANY ADVERSE WEATHER TO THE NATIONAL
WEATHER SERVICE OFFICE IN RUSKIN FLORIDA.

STAY TUNED TO RADIO...NOAA WEATHER RADIO...TELEVISION...AND/OR CABLE
TELEVISION FOR THE LATEST WEATHER INFORMATION.

OGLESBY

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 8:22 PM EDT	Severe Thunderstorm Warning	TBW	Polk	48 min
May 28, 2:55 PM EDT	Severe Thunderstorm Warning	TBW	Polk	50 min
May 28, 3:00 PM EDT	Tornado Warning	TBW	Polk	30 min
May 28, 3:49 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough	41 min
May 28, 4:32 PM EDT	Severe Thunderstorm Warning	TBW	Manatee	28 min
May 28, 4:32 PM EDT	Severe Thunderstorm Warning	TBW	Pinellas	43 min
May 28, 4:55 PM EDT	Severe Thunderstorm Warning	TBW	Sarasota	50 min

Nearby

Severe Thunderstorm Warnings in Florida, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.