Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tampa Bay, FL

July 12, 2021Hillsborough County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jul 12, 2021, 3:00 PM EDT for Hillsborough County, Florida. It was in force for 45 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 12, 2021, 3:00 PM EDT (19:00 UTC)
Expired: Jul 12, 2021, 3:45 PM EDT
In force: 45 min
Issued by: NWS Tampa Bay, FL

County Hillsborough County, FL

The radar

The Tampa radar (KTBW), 36 km from the middle of the area, began a volume at 19:02 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

Tampa Bay, FL (KTBW), launched 12:00Z, 7.0 hours before the alert went out and 36 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: 1557 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 960 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

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 12, 9:03 AM EDT, 5 hours 57 minutes earlier.

Area forecast discussion, Jul 12, 9:03 AM EDT, 5 hours 57 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jul 12, 4:40 AM EDT, 10 hours 20 minutes before

Hazardous Weather Outlook
National Weather Service Tampa Bay Ruskin FL
440 AM EDT Mon Jul 12 2021

FLZ043-050-052-056-057-061-139-142-148-149-151-155-160-162-165-
239-242-248-249-251-255-260-262-265-122045-
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-
440 AM EDT Mon Jul 12 2021

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

.DAY ONE...Today and Tonight.

...THUNDERSTORM IMPACT...
Scattered to numerous thunderstorms will develop this afternoon,
with some strong or severe storms possible. Thunderstorms are
expected to develop over the interior of Florida during the
early afternoon, then build northwest towards the west coast
through the late afternoon and early evening. Damaging wind gusts,
hail, frequent lightning, and locally heavy rain will all be
possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information
about observed severe weather to the NWS while following all
local, state, and CDC guidelines.

Fleming

In the hours before

Special weather statement, Jul 12, 3:00 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
300 PM EDT Mon Jul 12 2021

FLZ151-121945-
Coastal Hillsborough FL-
300 PM EDT Mon Jul 12 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HILLSBOROUGH COUNTY
UNTIL 345 PM EDT...

At 259 PM EDT, Doppler radar was tracking a strong thunderstorm over
Tampa, moving northwest at 20 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Tampa, Egypt Lake-Leto, Citrus Park, Greater Carrollwood, Palm
River-Clair Mel, Tampa International Airport, Lake Magdalene, East
Lake-Orient Park, University, West Park, Raymond James Stadium, Ybor
City, Soho, University Of Tampa, Carrollwood, Palm River, Peter O
Knight Airport, Davis Islands, Channelside and Town N Country.

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 2808 8256 2807 8255 2808 8247 2794 8236
      2786 8245 2800 8264
TIME...MOT...LOC 1859Z 131DEG 18KT 2796 8248

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:57 PM EDT	Special Marine Warning	TBW		63 min
Jul 12, 3:10 PM EDT	Special Weather Statement	TBW	Sumter	50 min
Jul 12, 3:24 PM EDT	Special Weather Statement	TBW	Hillsborough, Pinellas	51 min
Jul 12, 3:26 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Pinellas	19 min
Jul 12, 3:57 PM EDT	Special Marine Warning	TBW		63 min
Jul 12, 3:57 PM EDT	Severe Thunderstorm Warning	TBW	Pinellas	19 min
Jul 12, 4:14 PM EDT	Severe Thunderstorm Warning	TBW	Hernando, Pasco	17 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.