Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tampa Bay, FL

January 31, 2021Hillsborough County, Pinellas County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jan 31, 2021, 11:37 PM EST for Hillsborough County, Pinellas County, Florida. It was in force for 53 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: Jan 31, 2021, 11:37 PM EST (04:37 UTC)
Expired: Feb 1, 2021, 12:30 AM EST
In force: 53 min
Issued by: NWS Tampa Bay, FL

Counties Hillsborough County, FL, Pinellas County, FL

The radar

The Tampa radar (KTBW), 38 km from the middle of the area, began a volume at 04:40 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 00:00Z, 4.6 hours before the alert went out and 38 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: 1233 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 190 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Jan 31, 7:19 PM EST, 4 hours 18 minutes earlier.

Area forecast discussion, Jan 31, 7:19 PM EST, 4 hours 18 minutes before

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</head>
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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In the hours before

Special weather statement, Jan 31, 11:37 PM EST, 0 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
1137 PM EST Sun Jan 31 2021

FLZ050-149-151-249-251-010530-
Inland Pasco FL-Coastal Hillsborough FL-Pinellas FL-
Inland Hillsborough FL-Coastal Pasco FL-
1137 PM EST Sun Jan 31 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL PASCO...PINELLAS
AND CENTRAL HILLSBOROUGH COUNTIES UNTIL 1230 AM EST...

At 1137 PM EST, Doppler radar was tracking a strong thunderstorm 12
miles west of Bay Pines, or 12 miles southwest of Seminole, moving
northeast at 45 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Tampa, Clearwater, Largo, Pinellas Park, Temple Terrace, Seminole,
Downtown Saint Petersburg, Fort Desoto Park, Saint Petersburg, Lutz,
Brandon, St. Petersburg, St. Pete Beach, Palm Harbor, Tampa
International Airport, East Lake-Orient Park, Egypt Lake-Leto,
Ridgecrest, Keystone and Greater Northdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 2829 8249 2777 8226 2754 8278 2786 8291
      2808 8291
TIME...MOT...LOC 0437Z 244DEG 41KT 2776 8298

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 31, 11:40 PM EST	Special Marine Warning	TBW		65 min
Feb 1, 12:42 AM EST	Special Marine Warning	TBW		33 min
Feb 1, 4:05 AM EST	Wind Chill Advisory	TBW	Highlands, Polk	28 hr
Feb 1, 2:29 PM EST	Freeze Watch	TBW	Citrus, Levy	14 hr

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.