Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Tampa Bay, FL

August 20, 2012Polk County, Florida

NWS Tampa Bay, FL issued this special weather statement at Aug 20, 2012, 11:17 PM EDT for Polk County, Florida. It was in force for 28 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: Aug 20, 2012, 11:17 PM EDT (03:17 UTC)
Expired: Aug 20, 2012, 11:45 PM EDT
In force: 28 min
Issued by: NWS Tampa Bay, FL

County Polk County, FL

The radar

The Tampa radar (KTBW), 96 km from the middle of the area, began a volume at 03:18 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

Tampa Bay, FL (KTBW), launched 00:00Z, 3.3 hours before the alert went out and 96 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: 2983 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 817 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 45 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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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 20, 9:43 PM EDT, 1 hour 34 minutes earlier.

Area forecast discussion, Aug 20, 9:43 PM EDT, 1 hour 34 minutes before

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Hazardous weather outlook, Aug 20, 1:29 PM EDT, 9 hours 48 minutes before

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In the hours before

Local storm report, Aug 20, 9:04 PM EDT, 2 hours 13 minutes before

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Local storm report, Aug 20, 9:22 PM EDT, 1 hour 55 minutes before

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Special weather statement, Aug 20, 9:59 PM EDT, 1 hour 18 minutes before

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Local storm report, Aug 20, 10:06 PM EDT, 1 hour 11 minutes before

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Special weather statement, Aug 20, 11:05 PM EDT, 12 minutes before

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Special weather statement, Aug 20, 11:17 PM EDT, 0 minutes before

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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
Aug 20, 8:34 PM EDT	Special Marine Warning	TBW		56 min
Aug 20, 8:54 PM EDT	Special Weather Statement	TBW	Hillsborough, Pinellas	51 min
Aug 20, 9:32 PM EDT	Special Marine Warning	TBW		28 min
Aug 20, 9:38 PM EDT	Special Marine Warning	TBW		67 min
Aug 20, 9:59 PM EDT	Special Weather Statement	TBW	Hillsborough	61 min
Aug 20, 11:05 PM EDT	Special Weather Statement	TBW	Manatee	40 min
Aug 21, 6:47 AM EDT	Special Marine Warning	TBW		73 min
Aug 21, 9:14 AM EDT	Beach Hazards Statement	TBW	Pinellas	11 hr
Aug 21, 11:50 AM EDT	Special Marine Warning	TBW		85 min
Aug 21, 12:36 PM EDT	Areal Flood Advisory	TBW	Levy	3 hr
Aug 21, 1:15 PM EDT	Special Marine Warning	TBW		90 min
Aug 21, 2:06 PM EDT	Special Weather Statement	TBW	Polk	39 min
Aug 21, 2:42 PM EDT	Areal Flood Advisory	TBW	Hillsborough	63 min
Aug 21, 3:37 PM EDT	Areal Flood Advisory	TBW	Hernando, Pasco, Sumter	58 min
Aug 21, 5:03 PM EDT	Special Weather Statement	TBW	Hillsborough	57 min
Aug 21, 5:06 PM EDT	Special Marine Warning	TBW		54 min
Aug 21, 5:23 PM EDT	Areal Flood Advisory	TBW	Hillsborough, Pinellas	67 min

Nearby

Special Weather Statements in Florida, 2012 Every special weather statement in 2012

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.