Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 17, NWS Tampa Bay, FL

June 8, 2013Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 8, 2013, 3:09 PM EDT for Polk County, Florida. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 8, 2013, 3:09 PM EDT (19:09 UTC)
Expired: Jun 8, 2013, 4:00 PM EDT
In force: 51 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon

County Polk County, FL

The radar

The Tampa radar (KTBW), 74 km from the middle of the area, began a volume at 19:11 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, 7.2 hours before the alert went out and 131 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 50 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jun 8, 2:42 PM EDT, 27 minutes earlier.

Area forecast discussion, Jun 8, 2:42 PM EDT, 27 minutes before

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Hazardous weather outlook, Jun 8, 5:30 AM EDT, 9 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
530 AM EDT SAT JUN 8 2013

FLZ039-042-043-048>052-055>057-060>062-065-GMZ830-850-853-856-870-
873-876-082130-
LEVY-CITRUS-SUMTER-HERNANDO-PASCO-PINELLAS-HILLSBOROUGH-POLK-
MANATEE-HARDEE-HIGHLANDS-SARASOTA-DESOTO-CHARLOTTE-LEE-
TAMPA BAY WATERS-TARPON SPRINGS TO SUWANNEE RIVER OUT 20 NM-
ENGLEWOOD TO TARPON SPRINGS OUT 20 NM-
BONITA BEACH TO ENGLEWOOD OUT 20 NM-
TARPON SPRINGS TO SUWANNEE RIVER OUT 20 TO 60 NM-
ENGLEWOOD TO TARPON SPRINGS OUT 20 TO 60 NM-
BONITA BEACH TO ENGLEWOOD OUT 20 TO 60 NM-
530 AM EDT SAT JUN 8 2013

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

.DAY ONE...TODAY AND TONIGHT.

...THUNDERSTORM IMPACT...
SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WILL BEGIN ACROSS THE
SOUTH THIS MORNING AND SPREAD NORTH DURING THE DAY...WITH THE
SHOWERS BECOMING NUMEROUS IN THE AFTERNOON. THE MAIN THREATS
WILL BE HEAVY RAINFALL WITH MINOR FLOODING POSSIBLE...DEADLY
LIGHTNING...AND BRIEFLY STRONG WINDS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

...THUNDERSTORM IMPACT...
THUNDERSTORMS WILL BE NUMEROUS SUNDAY BUT SCATTERED FOR THE REST OF
THE WEEK. THE LOW LEVEL FLOW BECOMES WESTERLY FOR TUESDAY THROUGH
FRIDAY WITH STORMS ALONG COASTAL LOCATIONS IN THE MORNING THEN
SHIFTING INLAND FOR THE AFTERNOONS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY.

09/RKR

In the hours before

Special weather statement, Jun 8, 1:49 PM EDT, 1 hour 20 minutes before

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Special weather statement, Jun 8, 1:59 PM EDT, 1 hour 10 minutes before

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Special weather statement, Jun 8, 2:54 PM EDT, 15 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
Jun 8, 1:49 PM EDT	Special Weather Statement	TBW	Hillsborough	26 min
Jun 8, 1:59 PM EDT	Special Weather Statement	TBW	Polk	46 min
Jun 8, 2:54 PM EDT	Special Weather Statement	TBW	Polk	51 min
Jun 8, 7:03 PM EDT	Areal Flood Advisory	TBW	Hillsborough, Pinellas	87 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013 Every severe thunderstorm warning in 2013

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.