Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 24, NWS Tampa Bay, FL

March 31, 2011Hillsborough County, Pinellas County, Florida

NWS Tampa Bay, FL issued this tornado warning at Mar 31, 2011, 11:14 AM EDT for Hillsborough County, Pinellas County, Florida. It was in force for 46 min. 11 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Mar 31, 2011, 11:14 AM EDT (15:14 UTC)
Expired
Mar 31, 2011, 12:00 PM EDT
In force
46 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon

Counties Hillsborough County, FL, Pinellas County, FL

The radar

The Tampa radar (KTBW), 27 km from the middle of the area, began a volume at 15:15 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.

What was reported inside it

TimeReportWhereRemark
Mar 31, 11:15 AM EDTTSTM WND DMG4 Ese Largo, FLPOSSIBLE TORNADO. DEBRIS IN THE AIR WITH HORIZONTAL RAIN.
Mar 31, 11:18 AM EDTTSTM WND DMGMadeira Beach, FLROOF DAMAGE AND SIGNS BLOWING ACROSS ROAD.
Mar 31, 11:18 AM EDTNON-TSTM WND GST 55Saint Petersburg-Clearw, FL48 KNOTS
Mar 31, 11:20 AM EDTTSTM WND DMG2 Sw Largo, FLSPOTTER REPORTS DAMAGE TO NUMEROUS MOBILE HOMES IN THE VICINITY OF ULMERTON RD. AND RIDGE RD.
Mar 31, 11:20 AM EDTTSTM WND DMG5 Ssw Clearwater, FLROOF AND STRUCTURE DAMAGE NEAR LARGO MALL. ALSO REPORT OF 300 FOOT TOWER COLLAPSE IN AREA.
Mar 31, 11:20 AM EDTTORNADO5 W Brandon, FLUNCONFIRMED TORNADO. REPORTS OF TWO OVERTURNED VEHICLES.
Mar 31, 11:31 AM EDTTSTM WND GST 61Macdill Air Force Base, FL53 KNOT WIND GUST AT KMCF ASOS.
Mar 31, 11:40 AM EDTTSTM WND DMG2 Ese Tampa, FLNUMEROUS ROOFS MISSING AROUND TAMPA PORT AUTHORITY. STORAGE CONTAINERS ROUGHLY 40 FEET LONG TURNED OVER.
Mar 31, 11:40 AM EDTTORNADO5 W Brandon, FLUNCONFIRMED TORNADO. REPORTS OF TWO OVERTURNED VEHCILES. TIME ESTIMATED.
Mar 31, 11:45 AM EDTTSTM WND DMG3 Sw Brandon, FLDAMAGE ON BLOOMINGDALE AVENUE FROM GORTNO LAKE EASTWARD TO KINGS AVENUE. ONE TRUCK OVERTURNED. NUMEROUS TREES DOWN. TREE ON HOME. SIGNS DOWN. MULTIPLE REPORTS.
Mar 31, 11:55 AM EDTHAIL 0.753 W Plant City, FL

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Mar 31, 6:00 AM EDTTornado WatchSPC7 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 3.2 hours before the alert went out and 27 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 2011-03-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 728 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2011-03-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 543 square meters per square second.1939587897Sfc1 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
728 J/kg
Mixed-layer CIN
-58 J/kg
Mixed-layer LCL
787 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
543 m²/s²
0-3 km storm-relative helicity
606 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.9

Open this sounding in Storm Lab

The text

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

713 
WFUS52 KTBW 311514
TORTBW
FLC057-103-311600-
/O.NEW.KTBW.TO.W.0024.110331T1514Z-110331T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1114 AM EDT THU MAR 31 2011

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL HILLSBOROUGH COUNTY IN FLORIDA.
  CENTRAL PINELLAS COUNTY IN FLORIDA.

* UNTIL NOON EDT

* AT 1110 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO NEAR LARGO...MOVING EAST AT 45 MPH.

* THE TORNADO WILL BE NEAR...
  HIGHPOINT.
  TOWN 'N' COUNTRY.
  TAMPA.
  EAST LAKE-ORIENT PARK.
  MANGO.
  SEFFNER.

THIS INCLUDES INTERSTATE 275 BETWEEN EXITS 24 AND 51.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THE TORNADO GO TO A SMALL INTERIOR ROOM IN
A STRONG AND WELL CONSTRUCTED BUILDING. CARS AND MOBILE HOMES ARE NOT
SAFE. IF NO SHELTER IS AVAILABLE...LIE FLAT IN A DITCH OR CULVERT AND
COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR SOUTHWESTERN FLORIDA.

&&

LAT...LON 2796 8284 2801 8267 2798 8267 2798 8263
      2801 8263 2800 8266 2813 8215 2789 8207
      2783 8239 2789 8241 2792 8247 2782 8246
      2782 8253 2787 8256 2786 8259 2780 8261
      2778 8279
TIME...MOT...LOC 1514Z 258DEG 40KT 2790 8275

$$

JOHNSON
3 follow-up statements
001 
WWUS52 KTBW 311529
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1129 AM EDT THU MAR 31 2011

FLC057-103-311600-
/O.CON.KTBW.TO.W.0024.000000T0000Z-110331T1600Z/
PINELLAS FL-HILLSBOROUGH FL-
1129 AM EDT THU MAR 31 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR CENTRAL
HILLSBOROUGH AND CENTRAL PINELLAS COUNTIES...

AT 1124 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.   LOCATED NEAR FEATHER SOUND...OR 7 MILES
NORTHEAST OF PINELLAS PARK...MOVING EAST AT 45 MPH.

THE TORNADO WILL BE NEAR...
  TOWN 'N' COUNTRY.
  TAMPA.
  GIBSONTON.
  EAST LAKE-ORIENT PARK.
  MANGO.
  DOVER.

THIS IS A VERY DANGEROUS SITUATION. DOPPLER RADAR IS INDICATING 
WINDS OF 80 TO 90 MPH OVER OLD TAMPA BAY MOVING TOWARDS TAMPA. TAKE 
SHELTER IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THE TORNADO GO TO A SMALL INTERIOR ROOM IN
A STRONG AND WELL CONSTRUCTED BUILDING. CARS AND MOBILE HOMES ARE NOT
SAFE. IF NO SHELTER IS AVAILABLE...LIE FLAT IN A DITCH OR CULVERT AND
COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR SOUTHWESTERN FLORIDA.

&&

LAT...LON 2796 8284 2801 8267 2798 8267 2798 8263
      2801 8263 2800 8266 2813 8215 2789 8207
      2783 8239 2789 8241 2792 8247 2782 8246
      2782 8253 2787 8256 2786 8259 2780 8261
      2778 8279
TIME...MOT...LOC 1529Z 258DEG 40KT 2793 8256

$$

JOHNSON
581 
WWUS52 KTBW 311538
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1138 AM EDT THU MAR 31 2011

FLC057-103-311600-
/O.CON.KTBW.TO.W.0024.000000T0000Z-110331T1600Z/
PINELLAS FL-HILLSBOROUGH FL-
1138 AM EDT THU MAR 31 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR CENTRAL
HILLSBOROUGH AND EASTERN PINELLAS COUNTIES...

AT 1134 AM EDT...THE DOPPLER RADAR INDICATED A TORNADO.   
LOCATED NEAR TAMPA...MOVING EAST AT 40 MPH.

THE TORNADO WILL BE NEAR...
  TAMPA.
  PALM RIVER-CLAIR MEL.
  BRANDON.
  VALRICO.
  DOVER.

THIS INCLUDES INTERSTATE 275 BETWEEN EXITS 39 AND 50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THE TORNADO GO TO A SMALL INTERIOR ROOM IN
A STRONG AND WELL CONSTRUCTED BUILDING. CARS AND MOBILE HOMES ARE NOT
SAFE. IF NO SHELTER IS AVAILABLE...LIE FLAT IN A DITCH OR CULVERT AND
COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR SOUTHWESTERN FLORIDA.

&&

LAT...LON 2813 8215 2789 8207 2783 8239 2789 8241
      2792 8247 2782 8246 2782 8250 2783 8254
      2787 8256 2787 8259 2789 8260 2790 8257
      2789 8254 2794 8254 2797 8263 2801 8263
TIME...MOT...LOC 1538Z 266DEG 35KT 2791 8244

$$

JOHNSON
538 
WWUS52 KTBW 311544
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1144 AM EDT THU MAR 31 2011

FLC103-311554-
/O.CAN.KTBW.TO.W.0024.000000T0000Z-110331T1600Z/
PINELLAS FL-
1144 AM EDT THU MAR 31 2011

...THE TORNADO WARNING FOR EASTERN PINELLAS COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR SOUTHWESTERN FLORIDA.

LAT...LON 2784 8245 2786 8240 2789 8241 2792 8246
      2801 8244 2813 8215 2789 8207 2783 8239
      2785 8240 2783 8246 2784 8246
TIME...MOT...LOC 1544Z 261DEG 64KT 2792 8228

$$

FLC057-311600-
/O.CON.KTBW.TO.W.0024.000000T0000Z-110331T1600Z/
HILLSBOROUGH FL-
1144 AM EDT THU MAR 31 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR CENTRAL
HILLSBOROUGH COUNTY...

AT 1143 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.   LOCATED NEAR BRANDON...MOVING EAST AT 50 MPH.

THE TORNADO WILL BE NEAR...
  BRANDON.
  DOVER.

THIS IS AN EXTREMELY DANGEROUS SITUATION. TAKE COVER IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THE TORNADO GO TO A SMALL INTERIOR ROOM IN
A STRONG AND WELL CONSTRUCTED BUILDING. CARS AND MOBILE HOMES ARE NOT
SAFE. IF NO SHELTER IS AVAILABLE...LIE FLAT IN A DITCH OR CULVERT AND
COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EDT THURSDAY AFTERNOON
FOR SOUTHWESTERN FLORIDA.

&&

LAT...LON 2784 8245 2786 8240 2789 8241 2792 8246
      2801 8244 2813 8215 2789 8207 2783 8239
      2785 8240 2783 8246 2784 8246
TIME...MOT...LOC 1544Z 261DEG 64KT 2792 8228

$$

JOHNSON

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 30, 8:57 PM EDTSpecial Marine WarningTBW63 min
Mar 31, 1:06 AM EDTSpecial Marine WarningTBW54 min
Mar 31, 4:50 AM EDTSmall Craft AdvisoryTBW17 hr
Mar 31, 5:47 AM EDTSpecial Marine WarningTBW58 min
Mar 31, 6:10 AM EDTTornado WarningTBWHernando, Pasco50 min
Mar 31, 6:23 AM EDTSevere Thunderstorm WarningTBWHillsborough, Pasco, Pinellas52 min
Mar 31, 6:43 AM EDTSpecial Marine WarningTBW62 min
Mar 31, 7:15 AM EDTSpecial Weather StatementTBWPolk45 min
Mar 31, 7:30 AM EDTSevere Thunderstorm WarningTBWPolk45 min
Mar 31, 7:49 AM EDTSpecial Marine WarningTBW26 min
Mar 31, 7:53 AM EDTSevere Thunderstorm WarningTBWHillsborough, Pasco, Pinellas52 min
Mar 31, 8:24 AM EDTTornado WarningTBWHillsborough, Pasco, Pinellas51 min
Mar 31, 8:38 AM EDTSpecial Weather StatementTBWLevy52 min
Mar 31, 8:47 AM EDTSpecial Marine WarningTBW58 min
Mar 31, 8:57 AM EDTTornado WarningTBWHillsborough, Pasco, Polk33 min
Mar 31, 9:13 AM EDTSpecial Marine WarningTBW92 min
Mar 31, 9:14 AM EDTSpecial Weather StatementTBWCitrus, Hernando46 min
Mar 31, 9:26 AM EDTSpecial Marine WarningTBW94 min
Mar 31, 9:29 AM EDTTornado WarningTBWPolk19 min
Mar 31, 9:36 AM EDTSpecial Weather StatementTBWHernando, Sumter39 min
Mar 31, 9:37 AM EDTAreal Flood AdvisoryTBWCitrus, Hernando, Pasco, Polk, Sumter113 min
Mar 31, 9:39 AM EDTSpecial Weather StatementTBWLevy51 min
Mar 31, 9:44 AM EDTTornado WarningTBWCitrus, Hernando, Sumter31 min
Mar 31, 10:09 AM EDTSpecial Marine WarningTBW51 min
Mar 31, 10:14 AM EDTSevere Thunderstorm WarningTBWHernando, Sumter31 min
Mar 31, 10:29 AM EDTTornado WarningTBWPinellas61 min
Mar 31, 10:37 AM EDTSpecial Weather StatementTBWCitrus38 min
Mar 31, 10:52 AM EDTSpecial Marine WarningTBW23 min
Mar 31, 11:09 AM EDTSpecial Marine WarningTBW66 min
Mar 31, 11:22 AM EDTSevere Thunderstorm WarningTBWHillsborough, Manatee, Pinellas38 min
Mar 31, 11:35 AM EDTSevere Thunderstorm WarningTBWHillsborough, Polk40 min
Mar 31, 11:47 AM EDTAreal Flood AdvisoryTBWHillsborough, Pinellas88 min
Mar 31, 11:51 AM EDTTornado WarningTBWHillsborough, Polk39 min
Mar 31, 11:57 AM EDTSevere Thunderstorm WarningTBWHillsborough, Polk33 min
Mar 31, 12:01 PM EDTSpecial Marine WarningTBW59 min
Mar 31, 12:01 PM EDTSevere Thunderstorm WarningTBWManatee44 min
Mar 31, 12:10 PM EDTSpecial Weather StatementTBWPinellas50 min
Mar 31, 12:13 PM EDTTornado WarningTBWPolk32 min
Mar 31, 12:16 PM EDTFlash Flood WarningTBWPolk59 min
Mar 31, 12:23 PM EDTSevere Thunderstorm WarningTBWPolk22 min
Mar 31, 12:25 PM EDTSevere Thunderstorm WarningTBWHillsborough, Manatee, Pinellas35 min
Mar 31, 12:27 PM EDTSpecial Marine WarningTBW63 min
Mar 31, 12:53 PM EDTSpecial Weather StatementTBWPolk52 min
Mar 31, 1:02 PM EDTSpecial Marine WarningTBW118 min
Mar 31, 1:25 PM EDTAreal Flood AdvisoryTBWHillsborough, Manatee, Pinellas, Polk2 hr
Mar 31, 1:29 PM EDTSevere Thunderstorm WarningTBWHillsborough, Manatee31 min
Mar 31, 1:34 PM EDTSpecial Weather StatementTBWHillsborough, Pinellas41 min
Mar 31, 2:01 PM EDTSpecial Weather StatementTBWManatee44 min
Mar 31, 2:29 PM EDTSpecial Weather StatementTBWManatee, Sarasota46 min
Mar 31, 2:33 PM EDTSpecial Marine WarningTBW57 min
Mar 31, 3:13 PM EDTSpecial Weather StatementTBWHernando, Sumter47 min
Mar 31, 3:16 PM EDTSpecial Weather StatementTBWPinellas44 min
Mar 31, 3:18 PM EDTSpecial Marine WarningTBW12 min
Mar 31, 3:21 PM EDTRiver Flood WarningTBWPasco7 days
Mar 31, 3:21 PM EDTRiver Flood WarningTBWHillsborough3 days
Mar 31, 3:35 PM EDTSpecial Marine WarningTBW115 min
Mar 31, 4:27 PM EDTSpecial Weather StatementTBWManatee, Polk63 min
Mar 31, 4:39 PM EDTSevere Thunderstorm WarningTBWHardee, Hillsborough, Manatee, Sarasota36 min
Mar 31, 4:51 PM EDTSevere Thunderstorm WarningTBWManatee, Sarasota24 min
Mar 31, 5:18 PM EDTSpecial Marine WarningTBW57 min
Mar 31, 5:22 PM EDTSpecial Weather StatementTBWDeSoto, Hardee, Highlands, Sarasota53 min
Mar 31, 6:03 PM EDTSevere Thunderstorm WarningTBWHillsborough, Pasco, Pinellas29 min
Mar 31, 6:14 PM EDTSpecial Marine WarningTBW61 min
Mar 31, 7:47 PM EDTSpecial Marine WarningTBW58 min
Mar 31, 7:55 PM EDTSpecial Weather StatementTBWCharlotte50 min

Nearby

Tornado Warnings in Florida, 2011Every tornado warning in 2011Tornadoes in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.