Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Tallahassee, FL

July 17, 2021Jefferson County, Florida

NWS Tallahassee, FL issued this special weather statement at Jul 17, 2021, 1:03 PM EDT for Jefferson County, Florida. It was in force for 42 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 17, 2021, 1:03 PM EDT (17:03 UTC)
Expired: Jul 17, 2021, 1:45 PM EDT
In force: 42 min
Issued by: NWS Tallahassee, FL

County Jefferson County, FL

The radar

The Tallahassee radar (KTLH), 51 km from the middle of the area, began a volume at 17:07 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

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.1 hours before the alert went out and 48 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: 637 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 27 m²/s²
0-3 km storm-relative helicity: 27 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 Tallahassee, FL wrote its last area forecast discussion before this special weather statement went out at Jul 17, 11:22 AM EDT, 1 hour 41 minutes earlier.

Area forecast discussion, Jul 17, 11:22 AM EDT, 1 hour 41 minutes before

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<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.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, Jul 17, 1:03 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
103 PM EDT Sat Jul 17 2021

FLZ018-028-128-171745-
Inland Taylor FL-Inland Jefferson FL-Coastal Taylor FL-
103 PM EDT Sat Jul 17 2021

...SPECIAL WEATHER STATEMENT...

At 103 PM EDT, Doppler radar was tracking a strong thunderstorm 19
miles west of Perry, moving northeast at 5 mph.

Winds in excess of 30 mph will be possible with this storm.

Locations impacted include...
Goose Pasture, Iddo, Eridu and Cabbage Grove.

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 3015 8362 3013 8394 3017 8396 3018 8395
      3019 8396 3027 8400 3035 8380 3032 8379
      3032 8381 3031 8382 3030 8372
TIME...MOT...LOC 1703Z 244DEG 6KT 3021 8388

IG3

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:27 PM EDT	Special Weather Statement	TAE	Taylor	48 min
Jul 17, 1:35 PM EDT	Special Weather Statement	TAE	Jefferson	40 min
Jul 17, 2:15 PM EDT	Special Weather Statement	TAE	Jefferson	45 min
Jul 17, 2:34 PM EDT	Special Weather Statement	TAE	Taylor	41 min
Jul 17, 2:49 PM EDT	Special Weather Statement	TAE	Leon	41 min
Jul 17, 3:34 PM EDT	Special Weather Statement	TAE	Leon	41 min
Jul 17, 4:01 PM EDT	Special Weather Statement	TAE	Liberty	44 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.