Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 18, NWS Tampa Bay, FL

April 17, 2014Charlotte County, Sarasota County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Apr 17, 2014, 4:30 PM EDT for Charlotte County, Sarasota County, Florida. It was in force for 45 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: Apr 17, 2014, 4:30 PM EDT (20:30 UTC)
Expired: Apr 17, 2014, 5:15 PM EDT
In force: 45 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon

Counties Charlotte County, FL, Sarasota County, FL

The radar

The Tampa radar (KTBW), 78 km from the middle of the area, began a volume at 20:31 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

Miami, FL (KMFL), launched 12:00Z, 8.5 hours before the alert went out and 230 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: 1617 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.5

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 Apr 17, 3:37 PM EDT, 53 minutes earlier.

Area forecast discussion, Apr 17, 3:37 PM EDT, 53 minutes before

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Hazardous weather outlook, Apr 17, 5:37 AM EDT, 10 hours 53 minutes before

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In the hours before

Special weather statement, Apr 17, 4:14 PM EDT, 16 minutes before

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Special weather statement, Apr 17, 4:17 PM EDT, 13 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
Apr 16, 10:42 PM EDT	Small Craft Advisory	TBW		6 hr
Apr 17, 3:30 PM EDT	Flood Watch	TBW	Levy	24 hr
Apr 17, 4:14 PM EDT	Special Weather Statement	TBW	Lee	61 min
Apr 17, 4:17 PM EDT	Special Weather Statement	TBW	Sarasota	43 min
Apr 17, 5:28 PM EDT	Areal Flood Advisory	TBW	Charlotte, Sarasota	2 hr
Apr 17, 6:54 PM EDT	Special Weather Statement	TBW	DeSoto, Hardee	51 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014 Every severe thunderstorm warning in 2014

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.