Alert archive / Florida / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 44, NWS Tampa Bay, FL

July 21, 2019Citrus County, Hernando County, Sumter County, Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jul 21, 2019, 4:50 PM EDT for Citrus County, Hernando County, Sumter County, Florida. It was in force for 40 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: Jul 21, 2019, 4:50 PM EDT (20:50 UTC)
Expired: Jul 21, 2019, 5:30 PM EDT
In force: 40 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Citrus County, FL, Hernando County, FL, Sumter County, FL

The radar

The Tampa radar (KTBW), 111 km from the middle of the area, began a volume at 20:54 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, 8.8 hours before the alert went out and 183 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: 1889 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 865 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 29 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 Jul 21, 2:43 PM EDT, 2 hours 7 minutes earlier.

Area forecast discussion, Jul 21, 2:43 PM EDT, 2 hours 7 minutes before

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In the hours before

Local storm report, Jul 21, 3:32 PM EDT, 1 hour 18 minutes before

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Local storm report, Jul 21, 3:45 PM EDT, 1 hour 5 minutes before

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Special weather statement, Jul 21, 3:59 PM EDT, 51 minutes before

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Local storm report, Jul 21, 4:12 PM EDT, 38 minutes before

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Special weather statement, Jul 21, 4:24 PM EDT, 26 minutes before

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Local storm report, Jul 21, 4:27 PM EDT, 23 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 20, 10:20 PM EDT	River Flood Warning	TBW	Manatee	3 days
Jul 21, 1:59 PM EDT	Special Weather Statement	TBW	Highlands	46 min
Jul 21, 2:03 PM EDT	Special Weather Statement	TBW	DeSoto, Hardee	42 min
Jul 21, 2:07 PM EDT	Special Weather Statement	TBW	Pinellas	38 min
Jul 21, 2:44 PM EDT	Areal Flood Advisory	TBW	Pinellas	61 min
Jul 21, 2:50 PM EDT	Special Weather Statement	TBW	Polk	40 min
Jul 21, 3:06 PM EDT	Special Weather Statement	TBW	DeSoto	39 min
Jul 21, 3:21 PM EDT	Special Weather Statement	TBW	Hillsborough, Manatee	39 min
Jul 21, 3:44 PM EDT	Special Marine Warning	TBW		91 min
Jul 21, 3:59 PM EDT	Special Weather Statement	TBW	Hillsborough, Manatee, Pasco, Sarasota	61 min
Jul 21, 4:11 PM EDT	Areal Flood Advisory	TBW	Hillsborough	94 min
Jul 21, 4:24 PM EDT	Special Weather Statement	TBW	Sumter	36 min
Jul 21, 4:54 PM EDT	Special Weather Statement	TBW	Citrus, Hernando, Pasco	66 min
Jul 21, 5:08 PM EDT	Special Weather Statement	TBW	Lee	52 min
Jul 21, 5:25 PM EDT	Special Weather Statement	TBW	Levy	65 min
Jul 21, 5:40 PM EDT	Special Marine Warning	TBW		65 min
Jul 21, 5:55 PM EDT	Special Marine Warning	TBW		50 min

Nearby

Severe Thunderstorm Warnings in Florida, 2019 Every severe thunderstorm warning in 2019

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.