Alert archive / Florida / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 43, NWS Tampa Bay, FL

June 4, 20234 counties in Florida

NWS Tampa Bay, FL issued this severe thunderstorm warning at Jun 4, 2023, 7:04 PM EDT for 4 counties in Florida. It was in force for 41 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 4, 2023, 7:04 PM EDT (23:04 UTC)
Expired: Jun 4, 2023, 7:45 PM EDT
In force: 41 min
Issued by: NWS Tampa Bay, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hardee County, FL, Hillsborough County, FL, Manatee County, FL, Polk County, FL

The radar

The Tampa radar (KTBW), 34 km from the middle of the area, began a volume at 23:02 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, 11.1 hours before the alert went out and 273 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: 941 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 736 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.1

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 4, 1:57 PM EDT, 5 hours 7 minutes earlier.

Area forecast discussion, Jun 4, 1:57 PM EDT, 5 hours 7 minutes before

Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
157 PM EDT Sun Jun 4 2023

...New DISCUSSION, AVIATION, MARINE, FIRE WEATHER...

.DISCUSSION...
Afternoon sea breeze thunderstorm coverage expected to increase as
vort max moves overhead late this afternoon into the early evening
hours especially in coastal areas. Dry air aloft may enhance a
few storms becoming strong with frequent dangerous lightning,
gusty winds, heavy rainfall, and even some hail the main threats.

Upper low over the area to get picked up by upper trough down the
Atlantic seaboard tonight leaving weak quasi zonal flow aloft
through midweek. At the surface, remnants of Arlene expected to
move into the Bahamas Mon and merge with frontal boundary Tue in W
Atlantic while drier high pressure builds into the region. This
drying sfc-aloft would reduce PoPs areawide and especially N of
I-4 to below climate normals for early summer. Sensible conditions
to remain around summertime normals of warm and humid.

Late next week and into next weekend, another upper trough moves
into the Gulf as a front sags into and stalls in the N Gulf,
setting up a weak SW flow pattern and deeper moisture returns.
This pattern would generally favor morning showers/storms in the
E Gulf moving ashore then inland becoming scattered to numerous in
the afternoon.

&&

.AVIATION...
(18Z TAFS)
Sea breeze to develop producing SHRA/TSRA through around 24Z with
gusty winds MVFR cigs/vsbys in/near storms. VFR conditions return
areawide aft 00-02Z, but may again see patches of NE flow low
stratus/fog overnight towards 12Z, then VFR conditions would
return areawide aft 14Z Mon.

&&

.MARINE...
Weak pressure gradient to remain over the Eastern Gulf waters
as weak high pressure builds into the region through mid week.
Another front approaches the northern Gulf around mid week with
winds shifting to westerly across the waters through the end of
the week. Afternoon and evening thunderstorms will remain the main
marine hazard over the next couple of days, with dangerous
lightning and briefly increased winds and seas.

&&

.FIRE WEATHER...
High humidity and rain chances continue this afternoon into
Monday, as afternoon and evening thunderstorms continue to be the
main hazards with dangerous lightning and gusty erratic outflow
winds. Weak high pressure and drier air is expected to filter
into the area late Monday through mid week, with min RHs in the
40 to 50 percent range and low rain chances. Humidity and rain
chances return late week with west to southwest winds expected.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA  71  89  70  90 /  60  50  10  20
FMY  71  90  71  92 /  60  60  20  40
GIF  69  86  66  90 /  30  40  10  20
SRQ  70  89  69  90 /  60  50  20  20
BKV  66  90  63  92 /  30  40  10  10
SPG  73  87  73  88 /  60  50  20  20

&&

Sea Breeze Thunderstorm Regime For Sunday: 2
Sea Breeze Thunderstorm Regime For Monday: 3

For additional information on sea breeze regimes, go to:
     https://www.weather.gov/tbw/ThunderstormClimatology

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...None.
Gulf waters...None.

&&

RDavis

In the hours before

Local storm report, Jun 4, 6:07 PM EDT, 57 minutes before

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Local storm report, Jun 4, 6:11 PM EDT, 53 minutes before

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Special weather statement, Jun 4, 6:16 PM EDT, 48 minutes before

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Special weather statement, Jun 4, 6:41 PM EDT, 23 minutes before

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Special weather statement, Jun 4, 6:51 PM EDT, 13 minutes before

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Local storm report, Jun 4, 6:56 PM EDT, 8 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 3, 8:44 PM EDT	Areal Flood Advisory	TBW	Hillsborough	91 min
Jun 4, 4:08 PM EDT	Special Weather Statement	TBW	Citrus, Hernando	37 min
Jun 4, 4:14 PM EDT	Special Marine Warning	TBW		61 min
Jun 4, 5:20 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco	25 min
Jun 4, 5:46 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco	29 min
Jun 4, 6:16 PM EDT	Special Weather Statement	TBW	Hillsborough	44 min
Jun 4, 6:20 PM EDT	Areal Flood Advisory	TBW	Citrus, Levy	55 min
Jun 4, 6:41 PM EDT	Special Weather Statement	TBW	Hillsborough	34 min
Jun 4, 6:51 PM EDT	Special Weather Statement	TBW	Polk	24 min
Jun 4, 7:16 PM EDT	Special Weather Statement	TBW	Hardee, Polk	44 min
Jun 4, 7:31 PM EDT	Severe Thunderstorm Warning	TBW	DeSoto, Hardee, Highlands, Polk	29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2023 Every severe thunderstorm warning in 2023

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.