Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tampa Bay, FL

June 21, 2021Gilchrist County, Florida

NWS Tampa Bay, FL issued this special weather statement at Jun 21, 2021, 1:27 PM EDT for Gilchrist County, Florida. It was in force for 33 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: Jun 21, 2021, 1:27 PM EDT (17:27 UTC)
Expired: Jun 21, 2021, 2:00 PM EDT
In force: 33 min
Issued by: NWS Tampa Bay, FL

County Gilchrist County, FL

The radar

The Jacksonville radar (KJAX), 143 km from the middle of the area, began a volume at 17:28 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

Jacksonville, FL (KJAX), launched 12:00Z, 5.5 hours before the alert went out and 144 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: 803 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -75 m²/s²
0-3 km storm-relative helicity: -110 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 Jun 21, 8:59 AM EDT, 4 hours 28 minutes earlier.

Area forecast discussion, Jun 21, 8:59 AM EDT, 4 hours 28 minutes before

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</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>
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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, Jun 21, 1:27 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Tampa Bay Area Ruskin FL
127 PM EDT Mon Jun 21 2021

FLZ239-211800-
Inland Levy FL-
127 PM EDT Mon Jun 21 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LEVY COUNTY UNTIL
200 PM EDT...

At 127 PM EDT, Doppler radar was tracking a strong thunderstorm near
Trenton, moving northeast at 15 mph.

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

This storm will remain over mainly rural areas of north central Levy
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

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 2958 8276 2956 8275 2957 8266 2954 8265
      2954 8256 2943 8274 2958 8287
TIME...MOT...LOC 1727Z 233DEG 15KT 2955 8274

TBW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 2:35 PM EDT	Special Weather Statement	TBW	Manatee	40 min
Jun 21, 3:55 PM EDT	Special Weather Statement	TBW	Hillsborough	35 min
Jun 21, 4:09 PM EDT	Severe Thunderstorm Warning	TBW	Hillsborough, Polk	21 min
Jun 21, 4:21 PM EDT	Severe Thunderstorm Warning	TBW	Polk	24 min
Jun 21, 4:47 PM EDT	Special Weather Statement	TBW	Polk	28 min
Jun 21, 5:56 PM EDT	Special Weather Statement	TBW	Highlands	34 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.