Alert archive / Florida / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 26, NWS Tampa Bay, FL

April 25, 2003Levy County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 25, 2003, 2:24 PM EDT for Levy County, Florida. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 25, 2003, 2:24 PM EDT (18:24 UTC)
Expired: Apr 25, 2003, 3:15 PM EDT
In force: 51 min
Issued by: NWS Tampa Bay, FL
Area: Counties, with a storm outline in the text

County Levy County, FL

The radar

The Jacksonville radar (KJAX), 160 km from the middle of the area, began a volume at 18:25 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 25, 2:15 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 6.4 hours before the alert went out and 162 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: 109 J/kg
Mixed-layer CIN: -260 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 174 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

601 
WUUS52 KTBW 251824
SVRTBW
FLC075-251915-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
223 PM EDT FRI APR 25 2003

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LEVY COUNTY IN FLORIDA.

* UNTIL 315 PM EDT

* AT 223 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH DAMAGING WINDS...27 MILES WEST OF
  BRONSON...MOVING EAST AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  CHIEFLAND
  OTTER CREEK.
  BRONSON.
  WILLISTON.

MOVE INSIDE A STURDY BUILDING. DAMAGING WIND...LARGE HAIL...
TORRENTIAL RAIN...AND DEADLY LIGHTNING ARE EXPECTED. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

WIND GUSTS TO 60 MPH WILL CAUSE SOME STRUCTURAL DAMAGE...MAINLY TO
TREES AND POWER LINES. POORLY ANCHORED ROOFS...MOBILE HOMES...AND
SHEDS ARE ALSO AT RISK.

&&

LAT...LON 2938 8313 2921 8307 2939 8229 2963 8237

$$

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 Apr 25, 10:06 AM EDT, 4 hours 18 minutes earlier.

Area forecast discussion, Apr 25, 10:06 AM EDT, 4 hours 18 minutes before

WEST CENTRAL AND SOUTHWEST FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1006 AM EDT FRI APR 25 2003

.MORNING UPDATE...CLOUDINESS ALONG WITH SOME SHOWERS/ MOSTLY
LIGHT/ CONTINUE MOVING ACROSS THE NORTH END OF THE CWFA WHILE
PARTLY SUNNY PREVAILS ATTM FROM TAMPA BAY SOUTH...WITH A FEW LIGHT
SHOWERS OFFSHORE THE SOUTHWEST COAST. THE 12Z RAOB AND BUOY
DATA SUPPORT EXPANDING THE SCEC SOUTHWARD INTO THE MIDDLE
MARINE LEG. OTHER THAN THAT HEADLINE AND INCREASING THE WINDS...
NO OTHER CHANGES WITH CWF OUT AT 1020 AM. PUBLIC ZONES NOT BAD...
HOWEVER WILL UP DATE TO WORD FOR INCREASING CLOUDS...AND LATER IN
THE SOUTH. TEMPS LOOK GOOD AS IS.

.TBW...SMALL CRAFT EXERCISE CAUTION TODAY FROM ENGLEWOOD TO
       SUWANNEE RIVER...INCLUDING TAMPA BAY.

RKR

Hazardous weather outlook, Apr 25, 11:30 AM EDT, 2 hours 54 minutes before

FLZ039-042-043-048-049-252130-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1130 AM EDT FRI APR 25 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY:

A STRONG TO SEVERE LINE OF THUNDERSTORMS CROSSING THE FLORIDA
PANHANDLE AND THE FAR NORTHERN GULF WILL APPROACH THE NATURE COAST
THIS AFTERNOON. WHILE THE LINE IS EXPECTED TO WEAKEN SOME THIS
AFTERNOON...ISOLATED SEVERE THUNDERSTORMS ARE STILL POSSIBLE. THE
STRONGEST STORMS WILL CONTAIN FREQUENT TO EXCESSIVE LIGHTNING AND
GUSTY WINDS IN EXCESS OF 50 MPH.

WHEN SKIES DARKEN...MOVE INDOORS. IF THERE IS TIME...UNPLUG
APPLIANCES AND ELECTRICAL EQUIPMENT. WAIT UNTIL THE STORM ENDS BEFORE
USING THE TELEPHONE OR RUNNING WATER.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY:

.SPOTTER CALL TO ACTION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS AFTERNOON IF THE
THREAT OF SEVERE THUNDERSTORMS INCREASES.

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT
HTTP://WWW.SRH.NOAA.GOV/TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 2:04 PM EDT	Special Marine Warning	TBW		56 min
Apr 25, 3:00 PM EDT	Special Marine Warning	TBW		60 min
Apr 25, 4:11 PM EDT	Severe Thunderstorm Warning	TBW	Citrus	34 min
Apr 25, 6:16 PM EDT	Special Marine Warning	TBW		59 min
Apr 25, 7:21 PM EDT	Special Marine Warning	TBW		24 min
Apr 25, 7:47 PM EDT	Special Marine Warning	TBW		43 min

Nearby

Severe Thunderstorm Warnings in Florida, 2003 Every severe thunderstorm warning in 2003

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.