Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tampa Bay, FL

July 3, 2021Hernando County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jul 3, 2021, 2:40 PM EDT for Hernando County, Florida. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 3, 2021, 2:40 PM EDT (18:40 UTC)
Expired
Jul 3, 2021, 3:30 PM EDT
In force
50 min
Issued by
NWS Tampa Bay, FL

County Hernando County, FL

The radar

The Tampa radar (KTBW), 109 km from the middle of the area, began a volume at 18:38 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, 6.7 hours before the alert went out and 109 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-pSkew-T log-p diagram, Tampa Bay, FL at 12:00Z on 2021-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 984 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tampa Bay, FL at 12:00Z on 2021-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
984 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
823 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 3, 2:39 PM EDT, 1 minute earlier.

Area forecast discussion, Jul 3, 2:39 PM EDT, 1 minute before
Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
239 PM EDT Sat Jul 3 2021

.DISCUSSION...
Showers and thunderstorms continue to stream across the northern two-
thirds of our area as some upper level energy, coupled with ample
moisture and instability, continues to support this trend. Some of
the convection has been producing winds between 40-50mph, and the
tropical nature of the downpours has also been causing localized
flooding, primarily in urban areas. CAMs continue to support this
trend for a couple more hours before conditions start to wind
down later this evening.

West southwest flow should continue through tomorrow with the ridge
axis to our south and overspreading Cuba and South Florida. The
ridge starts to loose is grip as Elsa approaches, and a lighter and
less well-defined flow sets up for Monday. This favors more typical
convection for Monday, with the seabreezes as the driving forces.

Beyond Monday, conditions begin to be much more readily influenced
by TS Elsa. There's still a lot of uncertainty in the forecast,
given the rapid motion the system has now, and then the land
interaction that may take place with Cuba. Even so, there is an
increasing risk of tropical storm conditions over the southern
portion of the FL peninsula on Tuesday and the spreading northward
along the peninsula through Wednesday. Please continue to monitor
the forecast and the latest forecast from the National Hurricane
Center for additional information.

Once Elsa exits the region, more typical summertime conditions
return. WSW flow may return briefly as Elsa pulls away, but as the
ridge builds back in, ESE flow looks to set back up, bringing with
it the more typical afternoon and evening showers and thunderstorms
across the region, and otherwise typical summertime weather once
again.

&&

.AVIATION...
Gusty showers and thunderstorms remain an issue for northern TAF
sites as a highly favorable environment remains for convection with
a WSW flow pattern. The expectation is that this should start to
wind down as the evening draws to a close, but storms may again be
possible overnight with WSW flow. Southern terminals appear to be
mostly spared from this, although it's not impossible that storms
could drift into the vicinity of terminals until the evening.

&&

.MARINE...
Gusty showers and thunderstorms remain across the northern half of
our coastal waters through the afternoon and into the evening with
west southwest flow continuing. Southwest flow continues through
tomorrow before a little bit lighter flow sets up on Monday,
favoring storms mostly over the interior. Conditions start to
deteriorate across coastal waters beginning as early as Monday night
and lasting through mid week as Elsa approaches.

&&

.FIRE WEATHER...
Scattered to numerous showers and thunderstorms continue for the
next couple days. Looking to mid-week, Tropical Storm Elsa
approaches. Fire weather concerns are low through the forecast
period.

&&

.Preliminary Point Temps/PoPs...
TPA  87  79  90  77 / 100  20  30  10
FMY  90  77  93  77 /  30  10  20  10
GIF  86  75  91  75 / 100  20  40  10
SRQ  88  78  89  76 /  90  10  20  10
BKV  85  74  89  72 / 100  20  30  20
SPG  85  79  88  79 / 100  20  20  10

&&

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

Flannery

In the hours before

Local storm report, Jul 3, 12:42 PM EDT, 1 hour 58 minutes before
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Local storm report, Jul 3, 1:20 PM EDT, 1 hour 20 minutes before
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Local storm report, Jul 3, 1:28 PM EDT, 1 hour 12 minutes before
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Special weather statement, Jul 3, 1:32 PM EDT, 1 hour 8 minutes before
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Local storm report, Jul 3, 1:33 PM EDT, 1 hour 7 minutes before
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Special weather statement, Jul 3, 2:40 PM EDT, 0 minutes before
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The office that day

Everything else NWS Tampa Bay, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 3, 12:19 PM EDTSpecial Marine WarningTBW26 min
Jul 3, 12:21 PM EDTSpecial Weather StatementTBWHillsborough39 min
Jul 3, 1:15 PM EDTAreal Flood AdvisoryTBWHardee, Highlands2 hr
Jul 3, 1:30 PM EDTSpecial Marine WarningTBW30 min
Jul 3, 1:32 PM EDTSpecial Weather StatementTBWCitrus43 min
Jul 3, 1:49 PM EDTAreal Flood AdvisoryTBWHillsborough, Pinellas116 min
Jul 3, 2:54 PM EDTSpecial Weather StatementTBWHillsborough, Pinellas51 min
Jul 3, 3:37 PM EDTSpecial Marine WarningTBW38 min
Jul 3, 3:48 PM EDTSpecial Weather StatementTBWManatee27 min
Jul 3, 3:57 PM EDTAreal Flood AdvisoryTBWHernando, Pasco2 hr
Jul 3, 4:26 PM EDTSpecial Weather StatementTBWHardee49 min
Jul 3, 4:49 PM EDTSpecial Weather StatementTBWHardee41 min

Nearby

Special Weather Statements in Florida, 2021Every special weather statement in 2021

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.