Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Tampa Bay, FL

July 31, 2011Pasco County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jul 31, 2011, 3:25 PM EDT for Pasco 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 31, 2011, 3:25 PM EDT (19:25 UTC)
Expired: Jul 31, 2011, 4:15 PM EDT
In force: 50 min
Issued by: NWS Tampa Bay, FL

County Pasco County, FL

The radar

The Tampa radar (KTBW), 59 km from the middle of the area, began a volume at 19:28 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

Jacksonville, FL (KJAX), launched 12:00Z, 7.4 hours before the alert went out and 260 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: 2510 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 20 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 Jul 31, 1:34 PM EDT, 1 hour 51 minutes earlier.

Area forecast discussion, Jul 31, 1:34 PM EDT, 1 hour 51 minutes before

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Hazardous weather outlook, Jul 31, 5:28 AM EDT, 9 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
528 AM EDT SUN JUL 31 2011

FLZ039-042-043-048>052-055>057-060>062-065-312300-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DE SOTO-CHARLOTTE-LEE-
528 AM EDT SUN JUL 31 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WEST CENTRAL AND SOUTHWEST
FLORIDA.

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
DEEPER TROPICAL MOISTURE WILL ESTABLISH OVER THE REGION TODAY
HELPING TO INCREASE THUNDERSTORM CHANCES. WITH WEAK FLOW IN
PLACE...THE WEST COAST SEA BREEZE WILL BE ABLE PUSH WELL INLAND.
AFTERNOON THUNDERSTORMS THAT DEVELOP WILL BE ABLE TO PRODUCE
STRONG WINDS...FREQUENT LIGHTNING...HEAVY RAIN AND SMALL HAIL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

...THUNDERSTORM IMPACT...
DEEP MOISTURE IS EXPECTED TO REMAIN IN PLACE THROUGH MUCH OF THE
WEEK. EXPECT THUNDERSTORMS TO DEVELOP DURING THE AFTERNOON. SOME
STRONG STORMS WILL BE ABLE TO PRODUCE STRONG WINDS...FREQUENT
LIGHTNING...HEAVY RAIN AND SMALL HAIL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

BARRON

In the hours before

Special weather statement, Jul 31, 2:14 PM EDT, 1 hour 11 minutes before

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Special weather statement, Jul 31, 3:25 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
Jul 31, 12:00 AM EDT	Special Marine Warning	TBW		60 min
Jul 31, 12:02 AM EDT	Special Weather Statement	TBW	Manatee	43 min
Jul 31, 12:58 AM EDT	Special Weather Statement	TBW	Sumter	47 min
Jul 31, 1:15 AM EDT	Special Weather Statement	TBW	Pinellas	45 min
Jul 31, 1:41 AM EDT	Special Weather Statement	TBW	Hernando	49 min
Jul 31, 2:49 AM EDT	Special Marine Warning	TBW		56 min
Jul 31, 2:57 AM EDT	Special Marine Warning	TBW		33 min
Jul 31, 2:14 PM EDT	Special Weather Statement	TBW	Pinellas	31 min
Jul 31, 4:02 PM EDT	Special Weather Statement	TBW	Levy	28 min
Jul 31, 4:23 PM EDT	Special Weather Statement	TBW	Polk	52 min
Jul 31, 4:47 PM EDT	Special Weather Statement	TBW	Sumter	43 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.