Alert archive / Florida / Tornado Warnings in 2020

Tornado Warning 26, NWS Tampa Bay, FL

November 11, 20204 counties in Florida

NWS Tampa Bay, FL issued this tornado warning at Nov 11, 2020, 4:58 PM EST for 4 counties in 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 outline as issued.

The facts

Issued: Nov 11, 2020, 4:58 PM EST (21:58 UTC)
Expired: Nov 11, 2020, 5:30 PM EST
In force: 32 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, Pinellas County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 24 km from the middle of the area, began a volume at 22:00 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 tornado 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
Nov 11, 8:04 AM EST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 10.0 hours before the alert went out and 24 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: 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.

167 
WFUS52 KTBW 112158
TORTBW
FLC057-081-103-115-112230-
/O.NEW.KTBW.TO.W.0026.201111T2158Z-201111T2230Z/

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

The National Weather Service in Ruskin has issued a

* Tornado Warning for...
  Northwestern Manatee County in west central Florida...
  Southeastern Pinellas County in west central Florida...
  South central Hillsborough County in west central Florida...
  Northwestern Sarasota County in west central Florida...

* Until 530 PM EST.

* At 458 PM EST, a radar indicated waterspout was located just
  offshore over Gulf Gate Estates, or near Sarasota, moving north at
  45 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 tornado will be near...
  Kensington Park around 505 PM EST.
  Sarasota, North Sarasota, Sarasota Bradenton Airport, The Meadows 
  and Lakewood Ranch around 510 PM EST.
  West Samoset around 515 PM EST.
  Bradenton, Ellenton, South Bradenton and West Bradenton around 520 
  PM EST.
  Palmetto and Memphis around 525 PM EST.
  Parrish around 530 PM EST.

Other locations impacted by this tornadic thunderstorm include
Osprey, Bayshore Gardens, Cortez, Vamo, Oscar Scherer State Park, Bee
Ridge, Samoset, Desoto Lakes, Lake Maggiore and Palma Sola.

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 2775 8264 2775 8255 2776 8243 2718 8242
      2717 8256 2737 8266 2774 8273
TIME...MOT...LOC 2158Z 181DEG 40KT 2726 8253 

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

$$

TBW

1 follow-up statement

118 
WWUS52 KTBW 112227
SVSTBW

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

FLC057-081-103-115-112237-
/O.EXP.KTBW.TO.W.0026.000000T0000Z-201111T2230Z/
Manatee FL-Pinellas FL-Hillsborough FL-Sarasota FL-
527 PM EST Wed Nov 11 2020

...THE TORNADO WARNING FOR NORTHWESTERN MANATEE...SOUTHEASTERN
PINELLAS...SOUTH CENTRAL HILLSBOROUGH AND NORTHWESTERN SARASOTA
COUNTIES WILL EXPIRE AT 530 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.

LAT...LON 2775 8264 2775 8255 2776 8243 2718 8242
      2717 8256 2737 8266 2774 8273
TIME...MOT...LOC 2227Z 181DEG 40KT 2757 8252 

$$

TBW

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at Nov 11, 2:41 PM EST, 2 hours 17 minutes earlier.

Area forecast discussion, Nov 11, 2:41 PM EST, 2 hours 17 minutes before

Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
241 PM EST Wed Nov 11 2020

...THE THREAT FOR IMPACTS FROM TROPICAL STORM ETA CONTINUE...

.DISCUSSION...
Tropical Storm Eta continues to track NNE around 10 mph through the
eastern Gulf of Mexico. The latest position has the storm
approximately 110 NM southwest of the mouth of Tampa bay. Some drier
air has wrapped around Eta on the west side, but rain bands on the
east side of the storm continue to stream over the west coast of
Florida producing some heavy rainfall in some areas. Tropical Storm
force winds in the 40-70 mph range have been reported in surface
observations at many locations and will continue through the morning
hours on Thursday. The latest advisory has Eta making landfall near
Crystal River around 7 AM on Thursday morning as a strong Tropical
Storm. Eta then continues to move rapidly to the northeast over
northern Florida and then into the western Atlantic by early Friday
morning. For additional information on this storm see the latest
advisories being issued by the National Hurricane Center in Miami.

The good news is that high pressure builds in behind Eta starting
Friday bringing clearing conditions to the area for the weekend.
Temperatures will be on the cooler side today through Friday with
extensive cloudiness and rainfall, but will warm up to above average
on Saturday and Sunday. A cold front will push through the area on
Monday, but will be mostly dry as it moves through. A nice cool down
can be expected in the wake of this front starting Tuesday next week
bringing daytime highs into the 70's and overnight lows in the 50's
and 60's.

&&

.AVIATION...
Tropical Storm Eta continues to move north along the west coast of
Florida. Showers will continue to stream in from the south through
the day so will hold SHRA at all terminals. Some periods of MVFR/IFR
for low CIGs and VSBY will be possible through the period. Thunder
has been very sparse, so will hold off on mention of TSRA for now.
SE winds around 15-25 knots with gusts around 30-40 knots continue
through 06Z and will then start to gradually decrease and veer to
the southwest through Thursday morning.

&&

.MARINE...
Extremely hazardous marine conditions expected through the end of
the week as Tropical Storm Eta moves northward through the eastern
Gulf of Mexico off the west coast of Florida. Tropical Storm force
winds will be possible throughout the eastern Gulf of Mexico. Seas
just west of the mouth of Tampa Bay are already in excess of 11 feet
and will continue to further build over the next 12 hours with seas
building to 15-20 feet later this evening. All mariners should plan
to stay off the waters through the end of the week and continue to
monitor the progress of Tropical Storm Eta during the coming days.
For additional information on this storm see the latest advisories
being issued by the National Hurricane Center in Miami.

&&

.FIRE WEATHER...
Tropical Storm Eta continues to move through the eastern Gulf of
Mexico. Scattered showers and high RH values will preclude any red
flag conditions. Robust southeast winds during the next few days
will result in high dispersions for some locations.

&&

.Preliminary Point Temps/PoPs...
TPA  77  82  75  84 / 100  70  40  20
FMY  75  83  73  85 /  80  60  30  30
GIF  75  82  74  85 / 100  80  40  30
SRQ  77  83  75  84 / 100  60  30  20
BKV  74  82  72  84 / 100  80  50  30
SPG  76  81  75  83 / 100  60  40  20

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...High Rip Current Risk through Friday morning for Coastal
     Charlotte-Coastal Hillsborough-Coastal Lee-Coastal Manatee-
     Coastal Sarasota-Pinellas.

     Hurricane Watch for Coastal Citrus-Coastal Hernando-Coastal
     Hillsborough-Coastal Levy-Coastal Manatee-Coastal Pasco-
     Pinellas.

     High Surf Advisory until 1 PM EST Thursday for Coastal Charlotte-
     Coastal Hillsborough-Coastal Lee-Coastal Manatee-Coastal
     Sarasota-Pinellas.

     Flash Flood Watch through Friday afternoon for Coastal Charlotte-
     Coastal Citrus-Coastal Hernando-Coastal Hillsborough-
     Coastal Lee-Coastal Levy-Coastal Manatee-Coastal Pasco-
     Coastal Sarasota-DeSoto-Hardee-Highlands-Inland Charlotte-
     Inland Citrus-Inland Hernando-Inland Hillsborough-Inland
     Lee-Inland Levy-Inland Manatee-Inland Pasco-Inland Sarasota-
     Pinellas-Polk-Sumter.

     Storm Surge Warning for Coastal Charlotte-Coastal Citrus-Coastal
     Hernando-Coastal Hillsborough-Coastal Lee-Coastal Levy-
     Coastal Manatee-Coastal Pasco-Coastal Sarasota-Pinellas.

     Tropical Storm Warning for Coastal Charlotte-Coastal Citrus-
     Coastal Hernando-Coastal Hillsborough-Coastal Lee-Coastal
     Levy-Coastal Manatee-Coastal Pasco-Coastal Sarasota-Inland
     Citrus-Inland Hernando-Inland Hillsborough-Inland Levy-
     Inland Manatee-Inland Pasco-Inland Sarasota-Pinellas-Polk-
     Sumter.

Gulf waters...Hurricane Watch for Coastal waters from Englewood to Tarpon
     Springs FL out 20 NM-Coastal waters from Tarpon Springs to
     Suwannee River FL out 20 NM-Tampa Bay waters-Waters from
     Englewood to Tarpon Springs FL out 20 to 60 NM-Waters from
     Tarpon Springs to Suwannee River FL out 20 to 60 NM.

     Tropical Storm Warning for Charlotte Harbor and Pine Island
     Sound-Coastal waters from Bonita Beach to Englewood FL out
     20 NM-Coastal waters from Englewood to Tarpon Springs FL
     out 20 NM-Coastal waters from Tarpon Springs to Suwannee
     River FL out 20 NM-Tampa Bay waters-Waters from Bonita
     Beach to Englewood FL out 20 to 60 NM-Waters from Englewood
     to Tarpon Springs FL out 20 to 60 NM-Waters from Tarpon
     Springs to Suwannee River FL out 20 to 60 NM.

&&

DISCUSSION/AVIATION/MARINE/FIRE WEATHER...74/Wynn
DECISION SUPPORT...25/Davis

In the hours before

Local storm report, Nov 11, 2:48 PM EST, 2 hours 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
248 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0222 PM     TROPICAL STORM   2 ENE SAINT PETERSBURG  27.77N 82.63W
11/11/2020                   PINELLAS           FL   ASOS

            46 MPH WIND GUST REPORTED BY ASOS STATION
            KSPG ST PETERS ALBERT.

&&

JCM

Local storm report, Nov 11, 2:49 PM EST, 2 hours 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
249 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     TROPICAL STORM   2 S VENICE              27.07N 82.45W
11/11/2020                   GMZ853             FL   MESONET

            45 MPH WIND GUST REPORTED AT MESONET STATION
            VENF1 1 S VENICE.

&&

JCM

Local storm report, Nov 11, 3:52 PM EST, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
352 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0230 PM     TROPICAL STORM   23 SW LONGBOAT KEY      27.17N 82.92W
11/11/2020                   GMZ873             FL   MESONET

            54 MPH WIND GUST AT MESONET STATION 42013 22
            SW LONGBOAT KEY.

&&

JCM

Local storm report, Nov 11, 3:53 PM EST, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
353 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0311 PM     TROPICAL STORM   1 S WHITFIELD           27.40N 82.57W
11/11/2020                   MANATEE            FL   ASOS

            52 MPH WIND GUST AT ASOS STATION KSRQ
            SARASOTA BRADENT.

&&

JCM

Local storm report, Nov 11, 4:48 PM EST, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
448 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0315 PM     TROPICAL STORM   2 W VENICE GARDENS      27.07N 82.43W
11/11/2020                   SARASOTA           FL   AWOS

            53 MPH WIND GUST AT AWOS STATION KVNC
            VENICE.

&&

JCM

Local storm report, Nov 11, 4:49 PM EST, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
449 PM EST WED NOV 11 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0311 PM     TROPICAL STORM   1 S WHITFIELD           27.40N 82.57W
11/11/2020                   MANATEE            FL   ASOS

            52 MPH WIND GUST AT ASOS STATION KSRQ
            SARASOTA BRADENT.

&&

JCM

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 10, 7:38 PM EST	Special Weather Statement	TBW	Hardee	52 min
Nov 10, 8:05 PM EST	Special Weather Statement	TBW	Polk	40 min
Nov 10, 9:28 PM EST	Special Weather Statement	TBW	Citrus, Hernando, Pasco, Sumter	62 min
Nov 10, 9:41 PM EST	Flash Flood Watch	TBW	Charlotte, Citrus, DeSoto, Hardee, Hernando, Highlands and 9 more	33 hr
Nov 10, 10:16 PM EST	Storm Surge Watch	TBW	Charlotte, Citrus, Hernando, Hillsborough, Lee, Levy and 4 more	12 hr
Nov 10, 10:28 PM EST	Special Weather Statement	TBW	Citrus, Hernando, Levy, Sumter	92 min
Nov 11, 12:19 AM EST	Rip Current Statement	TBW	Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota	55 hr
Nov 11, 12:19 AM EST	High Surf Advisory	TBW	Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota	31 hr
Nov 11, 1:41 AM EST	Special Weather Statement	TBW	Lee	79 min
Nov 11, 4:20 AM EST	Hurricane Watch	TBW	Citrus, Hernando, Hillsborough, Levy, Manatee, Pasco and 1 more	17 hr
Nov 11, 4:50 AM EST	Special Weather Statement	TBW	Hardee, Polk	40 min
Nov 11, 8:09 AM EST	Special Marine Warning	TBW		36 min
Nov 11, 8:35 AM EST	River Flood Warning	TBW	Hillsborough	33 hr
Nov 11, 8:35 AM EST	River Flood Warning	TBW	Hillsborough	4 days
Nov 11, 8:35 AM EST	River Flood Warning	TBW	Manatee	64 hr
Nov 11, 8:35 AM EST	River Flood Warning	TBW	Hardee	31 hr
Nov 11, 10:35 AM EST	Storm Surge Warning	TBW	Charlotte, Citrus, Hernando, Hillsborough, Lee, Levy and 4 more	21 hr
Nov 11, 10:44 AM EST	Special Marine Warning	TBW		31 min
Nov 11, 11:51 AM EST	Special Marine Warning	TBW		24 min
Nov 11, 11:54 AM EST	Tornado Warning	TBW	Manatee, Sarasota	20 min
Nov 11, 12:21 PM EST	Tornado Warning	TBW	Pinellas	24 min
Nov 11, 12:24 PM EST	Tornado Warning	TBW	Hillsborough, Manatee	21 min
Nov 11, 12:44 PM EST	Tornado Warning	TBW	Pinellas	16 min
Nov 11, 12:46 PM EST	Special Marine Warning	TBW		29 min
Nov 11, 12:50 PM EST	Tornado Warning	TBW	Hillsborough, Pinellas	25 min
Nov 11, 1:13 PM EST	Tornado Warning	TBW	Pinellas	11 min
Nov 11, 4:40 PM EST	Tornado Warning	TBW	Manatee, Sarasota	20 min
Nov 11, 5:44 PM EST	Tornado Warning	TBW	Manatee	16 min
Nov 11, 5:54 PM EST	Tornado Warning	TBW	Hillsborough, Manatee	25 min

Nearby

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