Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 21, NWS Tampa Bay, FL

November 11, 2020Hillsborough County, Manatee County, Florida

NWS Tampa Bay, FL issued this tornado warning at Nov 11, 2020, 12:24 PM EST for Hillsborough County, Manatee County, Florida. It was in force for 21 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
Nov 11, 2020, 12:24 PM EST (17:24 UTC)
Expired
Nov 11, 2020, 12:45 PM EST
In force
21 min
Issued by
NWS Tampa Bay, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Hillsborough County, FL, Manatee County, FL

The radar

The Tampa radar (KTBW), 5 km from the middle of the area, began a volume at 17:24 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 watch it was issued in

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

IssuedProductOfficeLasted
Nov 11, 8:04 AM ESTTornado WatchSPC9 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 5.4 hours before the alert went out and 5 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 2020-11-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 87 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 2020-11-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 square meters per square second.193958Sfc1 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
87 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
985 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted.

047 
WFUS52 KTBW 111724
TORTBW
FLC057-081-111745-
/O.NEW.KTBW.TO.W.0021.201111T1724Z-201111T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tampa Bay Area Ruskin FL
1224 PM EST Wed Nov 11 2020

The National Weather Service in Ruskin has issued a

* Tornado Warning for...
  North central Manatee County in west central Florida...
  South central Hillsborough County in west central Florida...

* Until 1245 PM EST.
    
* At 1224 PM EST, a severe thunderstorm capable of producing a
  tornado was located near Parrish, or 13 miles east of Palmetto,
  moving north at 50 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Greater Sun Center around 1235 PM EST.
  Ruskin around 1240 PM EST.

Other locations impacted by this tornadic thunderstorm include Little
Manatee River State Park, Lake Manatee State Park, Sun City Center,
Gibsonton and Wimauma.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2778 8252 2779 8251 2780 8251 2784 8237
      2748 8230 2746 8237 2775 8256
TIME...MOT...LOC 1724Z 159DEG 48KT 2754 8236 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

TBW
1 follow-up statement
258 
WWUS52 KTBW 111740
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
1240 PM EST Wed Nov 11 2020

FLC057-081-111750-
/O.EXP.KTBW.TO.W.0021.000000T0000Z-201111T1745Z/
Manatee FL-Hillsborough FL-
1240 PM EST Wed Nov 11 2020

...THE TORNADO WARNING FOR NORTH CENTRAL MANATEE AND SOUTH CENTRAL
HILLSBOROUGH COUNTIES WILL EXPIRE AT 1245 PM EST...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 500 PM EST for west central
Florida.

LAT...LON 2778 8252 2779 8251 2780 8251 2784 8237
      2748 8230 2746 8237 2775 8256
TIME...MOT...LOC 1740Z 159DEG 48KT 2773 8244 

$$

TBW

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 10, 7:38 PM ESTSpecial Weather StatementTBWHardee52 min
Nov 10, 8:05 PM ESTSpecial Weather StatementTBWPolk40 min
Nov 10, 9:28 PM ESTSpecial Weather StatementTBWCitrus, Hernando, Pasco, Sumter62 min
Nov 10, 9:41 PM ESTFlash Flood WatchTBWCharlotte, Citrus, DeSoto, Hardee, Hernando, Highlands and 9 more33 hr
Nov 10, 10:16 PM ESTStorm Surge WatchTBWCharlotte, Citrus, Hernando, Hillsborough, Lee, Levy and 4 more12 hr
Nov 10, 10:28 PM ESTSpecial Weather StatementTBWCitrus, Hernando, Levy, Sumter92 min
Nov 11, 12:19 AM ESTRip Current StatementTBWCharlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota55 hr
Nov 11, 12:19 AM ESTHigh Surf AdvisoryTBWCharlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota31 hr
Nov 11, 1:41 AM ESTSpecial Weather StatementTBWLee79 min
Nov 11, 4:20 AM ESTHurricane WatchTBWCitrus, Hernando, Hillsborough, Levy, Manatee, Pasco and 1 more17 hr
Nov 11, 4:50 AM ESTSpecial Weather StatementTBWHardee, Polk40 min
Nov 11, 8:09 AM ESTSpecial Marine WarningTBW36 min
Nov 11, 8:35 AM ESTRiver Flood WarningTBWHillsborough33 hr
Nov 11, 8:35 AM ESTRiver Flood WarningTBWHillsborough4 days
Nov 11, 8:35 AM ESTRiver Flood WarningTBWManatee64 hr
Nov 11, 8:35 AM ESTRiver Flood WarningTBWHardee31 hr
Nov 11, 10:35 AM ESTStorm Surge WarningTBWCharlotte, Citrus, Hernando, Hillsborough, Lee, Levy and 4 more21 hr
Nov 11, 10:44 AM ESTSpecial Marine WarningTBW31 min
Nov 11, 11:51 AM ESTSpecial Marine WarningTBW24 min
Nov 11, 11:54 AM ESTTornado WarningTBWManatee, Sarasota20 min
Nov 11, 12:21 PM ESTTornado WarningTBWPinellas24 min
Nov 11, 12:44 PM ESTTornado WarningTBWPinellas16 min
Nov 11, 12:46 PM ESTSpecial Marine WarningTBW29 min
Nov 11, 12:50 PM ESTTornado WarningTBWHillsborough, Pinellas25 min
Nov 11, 1:13 PM ESTTornado WarningTBWPinellas11 min
Nov 11, 4:40 PM ESTTornado WarningTBWManatee, Sarasota20 min
Nov 11, 4:58 PM ESTTornado WarningTBWHillsborough, Manatee, Pinellas, Sarasota32 min
Nov 11, 5:44 PM ESTTornado WarningTBWManatee16 min
Nov 11, 5:54 PM ESTTornado WarningTBWHillsborough, Manatee25 min

Nearby

Tornado Warnings in Florida, 2020Every tornado warning in 2020Tornadoes in 2020

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.