Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 15, NWS Tampa Bay, FL

June 8, 2018Hillsborough County, Polk County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 8, 2018, 3:26 PM EDT for Hillsborough County, Polk County, Florida. It was in force for 49 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, 2018, 3:26 PM EDT (19:26 UTC)
Expired: Jun 8, 2018, 4:15 PM EDT
In force: 49 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hillsborough County, FL, Polk County, FL

The radar

The Tampa radar (KTBW), 45 km from the middle of the area, began a volume at 19:29 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 12:00Z, 7.4 hours before the alert went out and 45 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: 227 J/kg
Mixed-layer CIN: -116 J/kg
Mixed-layer LCL: 1107 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -55 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, 1:36 PM EDT, 1 hour 50 minutes earlier.

Area forecast discussion, Jun 8, 1:36 PM EDT, 1 hour 50 minutes before

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Hazardous weather outlook, Jun 8, 5:12 AM EDT, 10 hours 14 minutes before

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In the hours before

Special weather statement, Jun 8, 2:30 PM EDT, 56 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 7, 8:20 PM EDT	Special Weather Statement	TBW	Polk	25 min
Jun 7, 8:21 PM EDT	Special Weather Statement	TBW	DeSoto	39 min
Jun 7, 8:43 PM EDT	Areal Flood Advisory	TBW	Lee	92 min
Jun 8, 2:30 PM EDT	Special Weather Statement	TBW	Hillsborough	30 min
Jun 8, 4:02 PM EDT	Special Weather Statement	TBW	DeSoto	43 min
Jun 8, 4:07 PM EDT	Special Weather Statement	TBW	Hardee	38 min
Jun 8, 4:17 PM EDT	Special Weather Statement	TBW	Polk	43 min
Jun 8, 4:38 PM EDT	Special Weather Statement	TBW	Hardee	52 min
Jun 8, 5:04 PM EDT	Special Weather Statement	TBW	Polk	41 min
Jun 8, 5:31 PM EDT	Special Weather Statement	TBW	Highlands	29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018 Every severe thunderstorm warning in 2018

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.