Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Tampa Bay, FL

July 23, 2011Pinellas County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jul 23, 2011, 6:55 PM EDT for Pinellas County, Florida. It was in force for 50 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: Jul 23, 2011, 6:55 PM EDT (22:55 UTC)
Expired: Jul 23, 2011, 7:45 PM EDT
In force: 50 min
Issued by: NWS Tampa Bay, FL

County Pinellas County, FL

The radar

The Tampa radar (KTBW), 28 km from the middle of the area, began a volume at 22:58 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 nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 10.9 hours before the alert went out and 222 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: 972 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 997 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:41 PM EDT	Special Weather Statement	TBW	Polk	49 min
Jul 23, 4:14 PM EDT	Special Weather Statement	TBW	DeSoto	46 min
Jul 23, 4:23 PM EDT	Special Weather Statement	TBW	Polk	52 min
Jul 23, 4:34 PM EDT	Special Weather Statement	TBW	Lee	41 min
Jul 23, 5:10 PM EDT	Special Weather Statement	TBW	Hillsborough	50 min
Jul 23, 5:17 PM EDT	Special Weather Statement	TBW	Lee	43 min
Jul 23, 5:41 PM EDT	Areal Flood Advisory	TBW	Lee	64 min
Jul 23, 6:00 PM EDT	Special Weather Statement	TBW	Pasco	45 min
Jul 23, 6:07 PM EDT	Special Weather Statement	TBW	Hillsborough	38 min
Jul 23, 6:08 PM EDT	Special Marine Warning	TBW		37 min
Jul 23, 6:58 PM EDT	Special Weather Statement	TBW	Pasco	47 min
Jul 23, 7:04 PM EDT	Special Marine Warning	TBW		26 min
Jul 23, 7:17 PM EDT	Areal Flood Advisory	TBW	Hillsborough	58 min

Nearby

Special Weather Statements in Florida, 2011 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.