Alert archive / Florida / Special Weather Statements in 2020

Special Weather Statement, NWS Tallahassee, FL

August 7, 2020Lafayette County, Florida

NWS Tallahassee, FL issued this special weather statement at Aug 7, 2020, 11:56 AM EDT for Lafayette County, Florida. It was in force for 49 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: Aug 7, 2020, 11:56 AM EDT (15:56 UTC)
Expired: Aug 7, 2020, 12:45 PM EDT
In force: 49 min
Issued by: NWS Tallahassee, FL

County Lafayette County, FL

The radar

The Moody AFB radar (KVAX), 94 km from the middle of the area, began a volume at 15:56 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, 3.9 hours before the alert went out and 121 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: 448 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1032 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 17 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 Aug 7, 10:23 AM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Aug 7, 10:23 AM EDT, 1 hour 33 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>
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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, Aug 7, 11:56 AM EDT, 0 minutes before

Special Weather Statement
National Weather Service Tallahassee FL
1156 AM EDT Fri Aug 7 2020

FLZ029-071645-
Lafayette FL-
1156 AM EDT Fri Aug 7 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LAFAYETTE COUNTY UNTIL
1245 PM EDT...

At 1156 AM EDT, Doppler radar was tracking a strong thunderstorm near
Mayo, moving northeast at 35 mph.

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

Locations impacted include...
Mayo and Alton.

LAT...LON 2992 8311 3006 8325 3011 8320 3010 8318
      3011 8316 3010 8313 3010 8312 3009 8311
      3008 8307 3007 8307 3005 8303 3001 8300
      3001 8298
TIME...MOT...LOC 1556Z 227DEG 29KT 3005 8312

18-WOOL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 8:41 AM EDT	Special Marine Warning	TAE		94 min
Aug 7, 9:51 AM EDT	Special Marine Warning	TAE		43 min
Aug 7, 10:19 AM EDT	Special Marine Warning	TAE		26 min
Aug 7, 10:36 AM EDT	Special Marine Warning	TAE		84 min
Aug 7, 3:28 PM EDT	Special Weather Statement	TAE	Jackson	47 min
Aug 7, 4:15 PM EDT	Special Weather Statement	TAE	Walton	45 min

Nearby

Special Weather Statements in Florida, 2020 Every special weather statement in 2020

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.