Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 23, NWS Tampa Bay, FL

March 31, 2011Pinellas County, Florida

NWS Tampa Bay, FL issued this tornado warning at Mar 31, 2011, 10:29 AM EDT for Pinellas County, Florida. It was in force for 61 min. 6 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, 10:29 AM EDT (14:29 UTC)
Expired: Mar 31, 2011, 11:30 AM EDT
In force: 61 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon

County Pinellas County, FL

The radar

The Tampa radar (KTBW), 40 km from the middle of the area, began a volume at 14:28 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

Time	Report	Where	Remark
Mar 31, 11:15 AM EDT	TSTM WND DMG	4 Ese Largo, FL	POSSIBLE TORNADO. DEBRIS IN THE AIR WITH HORIZONTAL RAIN.
Mar 31, 11:18 AM EDT	TSTM WND DMG	Madeira Beach, FL	ROOF DAMAGE AND SIGNS BLOWING ACROSS ROAD.
Mar 31, 11:18 AM EDT	TSTM WND GST 59	Albert Whitted Airport, FL	51 KNOTS
Mar 31, 11:18 AM EDT	NON-TSTM WND GST 55	Saint Petersburg-Clearw, FL	48 KNOTS
Mar 31, 11:20 AM EDT	TSTM WND DMG	2 Sw Largo, FL	SPOTTER REPORTS DAMAGE TO NUMEROUS MOBILE HOMES IN THE VICINITY OF ULMERTON RD. AND RIDGE RD.
Mar 31, 11:20 AM EDT	TSTM WND DMG	5 Ssw Clearwater, FL	ROOF AND STRUCTURE DAMAGE NEAR LARGO MALL. ALSO REPORT OF 300 FOOT TOWER COLLAPSE IN AREA.

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.

Issued	Product	Office	Lasted
Mar 31, 6:00 AM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 2.5 hours before the alert went out and 40 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: 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.

108 
WFUS52 KTBW 311429
TORTBW
FLC103-311530-
/O.NEW.KTBW.TO.W.0023.110331T1429Z-110331T1530Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1029 AM EDT THU MAR 31 2011

THE NATIONAL WEATHER SERVICE IN RUSKIN HAS ISSUED A

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

* UNTIL 1130 AM EDT

* AT 1024 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 26 MILES WEST OF INDIAN ROCKS BEACH...OR 30 MILES WEST OF
  SEMINOLE...MOVING EAST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  INDIAN ROCKS BEACH.
  SEMINOLE.
  CLEARWATER.
  PINELLAS PARK.

THIS INCLUDES INTERSTATE 275 BETWEEN EXITS 22 AND 31.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...AS WATERSPOUTS MOVE ASHORE THEY BECOME TORNADOES AND
SHOULD BE CONSIDERED EXTREMELY DANGEROUS.

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 WESTERN FLORIDA.

&&

LAT...LON 2801 8283 2804 8265 2800 8264 2798 8268
      2799 8264 2796 8264 2796 8270 2794 8271
      2792 8265 2789 8262 2777 8262 2776 8278
      2782 8284 2791 8286
TIME...MOT...LOC 1429Z 267DEG 30KT 2785 8322

$$

JOHNSON

2 follow-up statements

073 
WWUS52 KTBW 311500
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1100 AM EDT THU MAR 31 2011

FLC103-311530-
/O.CON.KTBW.TO.W.0023.000000T0000Z-110331T1530Z/
PINELLAS FL-
1100 AM EDT THU MAR 31 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 AM EDT FOR CENTRAL
PINELLAS COUNTY...

AT 1056 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.   LOCATED 8 MILES WEST OF INDIAN ROCKS BEACH...OR
11 MILES WEST OF SEMINOLE...MOVING EAST AT 35 MPH.

THE TORNADO WILL BE NEAR...
  INDIAN ROCKS BEACH.
  BASKIN.
  KENNETH CITY.
  PINELLAS PARK.
  FEATHER SOUND.

THIS INCLUDES INTERSTATE 275 BETWEEN EXITS 23 AND 31.

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 WESTERN FLORIDA.

&&

LAT...LON 2801 8283 2804 8265 2800 8264 2798 8268
      2799 8264 2796 8264 2796 8270 2794 8271
      2792 8265 2789 8262 2777 8262 2776 8278
      2782 8284 2791 8286
TIME...MOT...LOC 1500Z 267DEG 30KT 2786 8293

$$

JOHNSON

846 
WWUS52 KTBW 311508
SVSTBW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAMPA BAY AREA - RUSKIN FL
1108 AM EDT THU MAR 31 2011

FLC103-311530-
/O.CON.KTBW.TO.W.0023.000000T0000Z-110331T1530Z/
PINELLAS FL-
1108 AM EDT THU MAR 31 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1130 AM EDT FOR CENTRAL
PINELLAS COUNTY...

AT 1106 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.   LOCATED NEAR INDIAN ROCKS BEACH...OR NEAR
SEMINOLE...MOVING EAST AT 35 MPH.

THE TORNADO WILL BE NEAR...
  REDINGTON SHORES.
  SEMINOLE.
  KENNETH CITY.
  PINELLAS PARK.
  FEATHER SOUND.

WINDS OF 70 MPH HAVE BEEN OBSERVED AT INDIAN SHORES BEACH. 

THIS INCLUDES INTERSTATE 275 BETWEEN EXITS 23 AND 31.

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.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF
YOUR HOME OR BUSINESS. THIS STORM HAS THE POTENTIAL TO CAUSE SERIOUS
INJURY AND SIGNIFICANT DAMAGE TO PROPERTY.

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

&&

LAT...LON 2801 8283 2804 8265 2800 8264 2798 8268
      2799 8264 2796 8264 2796 8270 2794 8271
      2792 8265 2789 8262 2777 8262 2776 8278
      2782 8284 2791 8286
TIME...MOT...LOC 1508Z 267DEG 30KT 2786 8285

$$

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 30, 8:57 PM EDT	Special Marine Warning	TBW		63 min
Mar 31, 1:06 AM EDT	Special Marine Warning	TBW		54 min
Mar 31, 4:50 AM EDT	Small Craft Advisory	TBW		17 hr
Mar 31, 5:47 AM EDT	Special Marine Warning	TBW		58 min
Mar 31, 6:10 AM EDT	Tornado Warning	TBW	Hernando, Pasco	50 min
Mar 31, 6:23 AM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco, Pinellas	52 min
Mar 31, 6:43 AM EDT	Special Marine Warning	TBW		62 min
Mar 31, 7:15 AM EDT	Special Weather Statement	TBW	Polk	45 min
Mar 31, 7:30 AM EDT	Severe Thunderstorm Warning	TBW	Polk	45 min
Mar 31, 7:49 AM EDT	Special Marine Warning	TBW		26 min
Mar 31, 7:53 AM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco, Pinellas	52 min
Mar 31, 8:24 AM EDT	Tornado Warning	TBW	Hillsborough, Pasco, Pinellas	51 min
Mar 31, 8:38 AM EDT	Special Weather Statement	TBW	Levy	52 min
Mar 31, 8:47 AM EDT	Special Marine Warning	TBW		58 min
Mar 31, 8:57 AM EDT	Tornado Warning	TBW	Hillsborough, Pasco, Polk	33 min
Mar 31, 9:13 AM EDT	Special Marine Warning	TBW		92 min
Mar 31, 9:14 AM EDT	Special Weather Statement	TBW	Citrus, Hernando	46 min
Mar 31, 9:26 AM EDT	Special Marine Warning	TBW		94 min
Mar 31, 9:29 AM EDT	Tornado Warning	TBW	Polk	19 min
Mar 31, 9:36 AM EDT	Special Weather Statement	TBW	Hernando, Sumter	39 min
Mar 31, 9:37 AM EDT	Areal Flood Advisory	TBW	Citrus, Hernando, Pasco, Polk, Sumter	113 min
Mar 31, 9:39 AM EDT	Special Weather Statement	TBW	Levy	51 min
Mar 31, 9:44 AM EDT	Tornado Warning	TBW	Citrus, Hernando, Sumter	31 min
Mar 31, 10:09 AM EDT	Special Marine Warning	TBW		51 min
Mar 31, 10:14 AM EDT	Severe Thunderstorm Warning	TBW	Hernando, Sumter	31 min
Mar 31, 10:37 AM EDT	Special Weather Statement	TBW	Citrus	38 min
Mar 31, 10:52 AM EDT	Special Marine Warning	TBW		23 min
Mar 31, 11:09 AM EDT	Special Marine Warning	TBW		66 min
Mar 31, 11:14 AM EDT	Tornado Warning	TBW	Hillsborough, Pinellas	46 min
Mar 31, 11:22 AM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Manatee, Pinellas	38 min
Mar 31, 11:35 AM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Polk	40 min
Mar 31, 11:47 AM EDT	Areal Flood Advisory	TBW	Hillsborough, Pinellas	88 min
Mar 31, 11:51 AM EDT	Tornado Warning	TBW	Hillsborough, Polk	39 min
Mar 31, 11:57 AM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Polk	33 min
Mar 31, 12:01 PM EDT	Special Marine Warning	TBW		59 min
Mar 31, 12:01 PM EDT	Severe Thunderstorm Warning	TBW	Manatee	44 min
Mar 31, 12:10 PM EDT	Special Weather Statement	TBW	Pinellas	50 min
Mar 31, 12:13 PM EDT	Tornado Warning	TBW	Polk	32 min
Mar 31, 12:16 PM EDT	Flash Flood Warning	TBW	Polk	59 min
Mar 31, 12:23 PM EDT	Severe Thunderstorm Warning	TBW	Polk	22 min
Mar 31, 12:25 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Manatee, Pinellas	35 min
Mar 31, 12:27 PM EDT	Special Marine Warning	TBW		63 min
Mar 31, 12:53 PM EDT	Special Weather Statement	TBW	Polk	52 min
Mar 31, 1:02 PM EDT	Special Marine Warning	TBW		118 min
Mar 31, 1:25 PM EDT	Areal Flood Advisory	TBW	Hillsborough, Manatee, Pinellas, Polk	2 hr
Mar 31, 1:29 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Manatee	31 min
Mar 31, 1:34 PM EDT	Special Weather Statement	TBW	Hillsborough, Pinellas	41 min
Mar 31, 2:01 PM EDT	Special Weather Statement	TBW	Manatee	44 min
Mar 31, 2:29 PM EDT	Special Weather Statement	TBW	Manatee, Sarasota	46 min
Mar 31, 2:33 PM EDT	Special Marine Warning	TBW		57 min
Mar 31, 3:13 PM EDT	Special Weather Statement	TBW	Hernando, Sumter	47 min
Mar 31, 3:16 PM EDT	Special Weather Statement	TBW	Pinellas	44 min
Mar 31, 3:18 PM EDT	Special Marine Warning	TBW		12 min
Mar 31, 3:21 PM EDT	River Flood Warning	TBW	Pasco	7 days
Mar 31, 3:21 PM EDT	River Flood Warning	TBW	Hillsborough	3 days
Mar 31, 3:35 PM EDT	Special Marine Warning	TBW		115 min
Mar 31, 4:27 PM EDT	Special Weather Statement	TBW	Manatee, Polk	63 min
Mar 31, 4:39 PM EDT	Severe Thunderstorm Warning	TBW	Hardee, Hillsborough, Manatee, Sarasota	36 min
Mar 31, 4:51 PM EDT	Severe Thunderstorm Warning	TBW	Manatee, Sarasota	24 min
Mar 31, 5:18 PM EDT	Special Marine Warning	TBW		57 min
Mar 31, 5:22 PM EDT	Special Weather Statement	TBW	DeSoto, Hardee, Highlands, Sarasota	53 min
Mar 31, 6:03 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco, Pinellas	29 min
Mar 31, 6:14 PM EDT	Special Marine Warning	TBW		61 min
Mar 31, 7:47 PM EDT	Special Marine Warning	TBW		58 min
Mar 31, 7:55 PM EDT	Special Weather Statement	TBW	Charlotte	50 min

Nearby

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