Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 10, NWS Tampa Bay, FL

April 11, 2021Lee County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 11, 2021, 4:08 PM EDT for Lee County, Florida. It was in force for 17 min. 1 report 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: Apr 11, 2021, 4:08 PM EDT (20:08 UTC)
Expired: Apr 11, 2021, 4:25 PM EDT
In force: 17 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lee County, FL

The radar

The Tampa radar (KTBW), 138 km from the middle of the area, began a volume at 20:07 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
Apr 11, 4:10 PM EDT	HAIL 0.25	4 N Cape Coral, FL	CORRECTS PREVIOUS HAIL REPORT FROM 4 N CAPE CORAL. MEDIA REPORTED PEA SIZE HAIL RELATED TO A STORM HAPPENING AROUND 4PM.

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
Apr 11, 2:03 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.1 hours before the alert went out and 138 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: 1004 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 288 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

119 
WUUS52 KTBW 112008
SVRTBW
FLC071-112045-
/O.NEW.KTBW.SV.W.0010.210411T2008Z-210411T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tampa Bay Area Ruskin FL
408 PM EDT Sun Apr 11 2021

The National Weather Service in Ruskin has issued a

* Severe Thunderstorm Warning for...
  Central Lee County in southwestern Florida...

* Until 445 PM EDT.

* At 408 PM EDT, a severe thunderstorm was located over Cape Coral,
  moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Cape Coral, Fort Myers, Lehigh Acres, East Dunbar, Southwest
  Florida Airport, Harlem Heights, Lochmoor Waterway Estates, Iona,
  Cypress Lake, San Carlos Park, McGregor, Pine Manor, Lovers Key
  State Park, Buckingham, Villas, Three Oaks, Matlacha Isles-Matlacha
  Shores, Palmona Park, St. James City and Page Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2650 8208 2668 8205 2669 8158 2633 8175
TIME...MOT...LOC 2008Z 272DEG 24KT 2655 8198 

HAIL...1.00IN
WIND...60MPH
 
$$

TBW

1 follow-up statement

653 
WWUS52 KTBW 112025
SVSTBW

Severe Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
425 PM EDT Sun Apr 11 2021

FLC071-112035-
/O.CAN.KTBW.SV.W.0010.000000T0000Z-210411T2045Z/
Lee FL-
425 PM EDT Sun Apr 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL LEE COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southwestern Florida.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Ruskin.

LAT...LON 2650 8208 2668 8205 2669 8158 2633 8175
TIME...MOT...LOC 2021Z 272DEG 24KT 2655 8185 

$$

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 3:32 AM EDT	Small Craft Advisory	TBW		16 hr
Apr 11, 5:46 AM EDT	Special Weather Statement	TBW	Gilchrist	44 min
Apr 11, 9:13 AM EDT	Special Marine Warning	TBW		92 min
Apr 11, 9:14 AM EDT	Rip Current Statement	TBW	Charlotte, Hillsborough, Lee, Manatee, Pinellas, Sarasota	15 hr
Apr 11, 9:28 AM EDT	Special Weather Statement	TBW	Hernando	47 min
Apr 11, 10:44 AM EDT	Special Marine Warning	TBW		61 min
Apr 11, 11:09 AM EDT	Severe Thunderstorm Warning	TBW	Hernando, Hillsborough, Pasco, Pinellas, Sumter	32 min
Apr 11, 11:49 AM EDT	Special Marine Warning	TBW		56 min
Apr 11, 11:56 AM EDT	Special Weather Statement	TBW	Hillsborough, Polk	64 min
Apr 11, 12:23 PM EDT	Special Weather Statement	TBW	Hillsborough, Pinellas	37 min
Apr 11, 1:01 PM EDT	Severe Thunderstorm Warning	TBW	Hardee, Hillsborough, Manatee, Polk	29 min
Apr 11, 1:32 PM EDT	Special Weather Statement	TBW	Hardee, Highlands	43 min
Apr 11, 1:47 PM EDT	Severe Thunderstorm Warning	TBW	Highlands	28 min
Apr 11, 3:13 PM EDT	Special Marine Warning	TBW		62 min
Apr 11, 3:41 PM EDT	Special Weather Statement	TBW	Charlotte, Lee	49 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every severe thunderstorm warning in 2021

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.