Alert archive / Florida / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 44, NWS Tampa Bay, FL

September 12, 2015Citrus County, Hernando County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Sep 12, 2015, 5:07 PM EDT for Citrus County, Hernando County, Florida. It was in force for 38 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: Sep 12, 2015, 5:07 PM EDT (21:07 UTC)
Expired: Sep 12, 2015, 5:45 PM EDT
In force: 38 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon

Counties Citrus County, FL, Hernando County, FL

The radar

The Tampa radar (KTBW), 111 km from the middle of the area, began a volume at 21:09 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, 9.1 hours before the alert went out and 214 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: 232 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.7

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 Sep 12, 3:08 PM EDT, 1 hour 59 minutes earlier.

Area forecast discussion, Sep 12, 3:08 PM EDT, 1 hour 59 minutes before

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Hazardous weather outlook, Sep 12, 5:02 AM EDT, 12 hours 5 minutes before

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In the hours before

Special weather statement, Sep 12, 12:29 PM EDT, 4 hours 38 minutes before

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Local storm report, Sep 12, 2:15 PM EDT, 2 hours 52 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
Sep 12, 4:07 AM EDT	Small Craft Advisory	TBW		18 hr
Sep 12, 4:28 AM EDT	Special Marine Warning	TBW		2 hr
Sep 12, 5:38 AM EDT	Special Marine Warning	TBW		82 min
Sep 12, 5:52 AM EDT	Special Weather Statement	TBW	Levy	38 min
Sep 12, 12:29 PM EDT	Special Weather Statement	TBW	Levy	31 min
Sep 12, 5:08 PM EDT	Special Marine Warning	TBW		22 min
Sep 12, 5:57 PM EDT	Special Weather Statement	TBW	Sumter	48 min

Nearby

Severe Thunderstorm Warnings in Florida, 2015 Every severe thunderstorm warning in 2015

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.