Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tampa Bay, FL

February 13, 2021Pasco County, Florida

NWS Tampa Bay, FL issued this special weather statement at Feb 13, 2021, 7:49 AM EST for Pasco County, 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 outline as issued.

The facts

Issued: Feb 13, 2021, 7:49 AM EST (12:49 UTC)
Expired: Feb 13, 2021, 8:30 AM EST
In force: 41 min
Issued by: NWS Tampa Bay, FL

County Pasco County, FL

The radar

The Tampa radar (KTBW), 68 km from the middle of the area, began a volume at 12:52 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, 0.8 hours before the alert went out and 68 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3261 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 187 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 Feb 13, 3:59 AM EST, 3 hours 50 minutes earlier.

Area forecast discussion, Feb 13, 3:59 AM EST, 3 hours 50 minutes before

Area Forecast Discussion
National Weather Service Tampa Bay Ruskin FL
359 AM EST Sat Feb 13 2021

.DISCUSSION...
A stalled out boundary will be the main influence over our weather
pattern not only this weekend but also early next week.

Lets talk about the weekend first. The boundary will be hovering
between North Florida and South Georgia. That means we will be stuck
in the warm moist airmass. Add in afternoon sunshine and we will
start seeing convection firing up in the afternoon and early
evening. A couple of these storms could produce strong winds and a
tornado is not out of the question. These conditions will be the
same for Monday with afternoon and evening convection.

As we go into Tuesday upper level energy will help to push the front
south. This will dry us out temporarily and bring slightly cooler
temperatures. This will not last long as another stronger cold
front heads our way. This will result in the warm moist air
returning quickly to the area Wednesday and Thursday. By late
Thursday this cold front will push through and give us our first
significant cool down with highs back in the 60 on Friday.

&&

.AVIATION...
MVFR, IFR, and LIFR CIGs will persist through the rest of the
overnight and morning hours. CIGS will start to lift by late
morning and VFR will prevail for the rest of the period. Winds
will remain out of the south for the period.

&&

.MARINE...
A cold front to our north through the weekend will keep
us in a warm moist southerly flow. Our main boating hazards will be
patchy sea fog and showers and storms in the afternoon and evening.
We will see much of the same for Monday. By Tuesday a cold front
will move through shifting winds to the south.

&&

.FIRE WEATHER...
A cold front to our north will keep warm moist air over the area
for the weekend. No fire weather hazards are expected.

&&

.Preliminary Point Temps/PoPs...
TPA  69  79  68  81 /  60  50  20  30
FMY  70  84  69  85 /  50  30  10  20
GIF  68  83  68  85 /  50  50  20  40
SRQ  68  80  68  81 /  70  40  20  20
BKV  64  82  63  84 /  50  60  20  40
SPG  68  76  68  78 /  60  50  20  30

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...None.
Gulf waters...Dense Fog Advisory until 10 AM EST this morning for Coastal
     waters from Tarpon Springs to Suwannee River FL out 20 NM-
     Waters from Tarpon Springs to Suwannee River FL out 20 to
     60 NM.

&&

DISCUSSION/AVIATION/MARINE/FIRE WEATHER...27/Shiveley
DECISION SUPPORT...74/Wynn

Hazardous weather outlook, Feb 13, 5:01 AM EST, 2 hours 48 minutes before

Hazardous Weather Outlook
National Weather Service Tampa Bay Ruskin FL
501 AM EST Sat Feb 13 2021

FLZ043-050-052-056-057-061-139-142-148-149-151-155-160-162-165-
239-242-248-249-251-255-260-262-265-GMZ830-836-850-853-856-870-
873-876-140000-
Sumter-Pinellas-Polk-Hardee-Highlands-DeSoto-Coastal Levy-
Coastal Citrus-Coastal Hernando-Coastal Pasco-
Coastal Hillsborough-Coastal Manatee-Coastal Sarasota-
Coastal Charlotte-Coastal Lee-Inland Levy-Inland Citrus-
Inland Hernando-Inland Pasco-Inland Hillsborough-Inland Manatee-
Inland Sarasota-Inland Charlotte-Inland Lee-Tampa Bay waters-
Charlotte Harbor and Pine Island Sound-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
501 AM EST Sat Feb 13 2021

This Hazardous Weather Outlook is for West Central And Southwest
Florida.

.DAY ONE...Today and Tonight.

...THUNDERSTORM IMPACT...
A few thunderstorms are expected from later this afternoon into
the evening hours. Thunderstorms that form will be capable of
producing strong gusty winds...locally heavy rains...and frequent
deadly lightning strikes. There is the possibility of a storm
becoming strong to locally severe with the main threat being
damaging wind gusts or a brief tornado or waterspout.

...DENSE SEA FOG...
Visibilities will frequently be reduced to less than one quarter
mile in dense sea fog over the gulf waters.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

...THUNDERSTORM IMPACT...
A few thunderstorms are expected on Sunday afternoon into the
evening hours. Thunderstorms that form will be capable of
producing strong gusty winds...locally heavy rains...and frequent
deadly lightning strikes. There is the possibility of a storm
becoming strong to locally severe with the main threat being
damaging wind gusts or a brief tornado or waterspout.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

TBW

In the hours before

Special weather statement, Feb 13, 7:31 AM EST, 18 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
731 AM EST Sat Feb 13 2021

FLZ050-151-131300-
Coastal Hillsborough FL-Pinellas FL-
731 AM EST Sat Feb 13 2021

...SIGNIFICANT WEATHER ADVISORY FOR PINELLAS COUNTY UNTIL 800 AM
EST...

At 731 AM EST, Doppler radar was tracking a strong thunderstorm near
Bay Pines, or near Seminole, moving northeast at 45 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Tampa, Clearwater, Largo, Pinellas Park, Seminole, St. Petersburg,
St. Pete Beach, Bay Pines, South Highpoint, Harbor Bluffs, Gandy,
Feather Sound, West And East Lealman, Ridgecrest, Safety Harbor,
Oldsmar, Gulfport, Treasure Island, Kenneth City and South Pasadena.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2790 8291 2805 8273 2799 8256 2789 8250
      2766 8282 2768 8285 2786 8291
TIME...MOT...LOC 1231Z 227DEG 41KT 2779 8283

TBW

Local storm report, Feb 13, 7:39 AM EST, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
739 AM EST SAT FEB 13 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 AM     MARINE TSTM WIND 4 NNW BELLEAIR          27.99N 82.83W
02/13/2021  M49 MPH          PINELLAS           FL   MESONET

            MESONET STATION FW1789 CLEARWATER BEACH.

&&

DJN

Special weather statement, Feb 13, 7:49 AM EST, 0 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
749 AM EST Sat Feb 13 2021

FLZ050-052-149-151-248-249-251-131330-
Inland Hernando FL-Inland Pasco FL-Coastal Hillsborough FL-
Pinellas FL-Polk FL-Inland Hillsborough FL-Coastal Pasco FL-
749 AM EST Sat Feb 13 2021

...SIGNIFICANT WEATHER ADVISORY FOR PASCO...SOUTHEASTERN HERNANDO...
NORTH CENTRAL PINELLAS...NORTHWESTERN POLK AND NORTHERN HILLSBOROUGH
COUNTIES UNTIL 830 AM EST...

At 748 AM EST, Doppler radar was tracking strong thunderstorms along
a line extending from North Weeki Wachee to near Keystone. Movement
was east at 45 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Tampa, Spring Hill, Temple Terrace, New Port Richey, Zephyrhills,
Dade City, Hudson, Lutz, Holiday, St. Leo, Palm Harbor, Hillsborough
River State Park, New Port Richey East, Zephyrhills South,
Zephyrhills West, Land O Lakes, Greater Carrollwood, University,
Wesley Chapel South and Beacon Square.

LAT...LON 2836 8273 2857 8215 2854 8213 2854 8211
      2839 8205 2832 8206 2831 8205 2832 8203
      2812 8197 2804 8245 2805 8279 2817 8282
TIME...MOT...LOC 1248Z 254DEG 37KT 2857 8256 2810 8263

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 13, 7:10 AM EST	Special Marine Warning	TBW		50 min
Feb 13, 7:31 AM EST	Special Weather Statement	TBW	Pinellas	29 min
Feb 13, 7:42 AM EST	Special Marine Warning	TBW		33 min
Feb 13, 8:13 AM EST	Severe Thunderstorm Warning	TBW	Hillsborough, Pasco	32 min
Feb 13, 8:17 AM EST	Special Marine Warning	TBW		29 min
Feb 13, 8:42 AM EST	Special Weather Statement	TBW	Pasco	33 min
Feb 13, 10:10 AM EST	Areal Flood Advisory	TBW	Polk	61 min

Nearby

Special Weather Statements in Florida, 2021 Every 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.