Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 163, NWS Tallahassee, FL

July 24, 2013Walton County, Florida

NWS Tallahassee, FL issued this severe thunderstorm warning at Jul 24, 2013, 1:13 PM CDT for Walton County, Florida. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 24, 2013, 1:13 PM CDT (18:13 UTC)
Expired
Jul 24, 2013, 2:00 PM CDT
In force
47 min
Issued by
NWS Tallahassee, FL
Area
Storm-based polygon

County Walton County, FL

The radar

The Eglin Afb radar (KEVX), 25 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 181 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-pSkew-T log-p diagram, Tallahassee Rgnl, FL at 12:00Z on 2013-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1069 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2013-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1069 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
474 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 24, 9:41 AM CDT, 3 hours 32 minutes earlier.

Area forecast discussion, Jul 24, 9:41 AM CDT, 3 hours 32 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>

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 23, 7:10 PM CDTSpecial Marine WarningTAE95 min
Jul 23, 7:23 PM CDTSevere Thunderstorm WarningTAECalhoun, Gadsden, Jefferson, Leon, Liberty, Wakulla52 min
Jul 23, 7:44 PM CDTSpecial Weather StatementTAEBay, Franklin, Gulf, Liberty, Wakulla61 min
Jul 23, 8:25 PM CDTRiver Flood WarningTAEWalton11 days
Jul 23, 8:33 PM CDTSpecial Marine WarningTAE87 min
Jul 24, 8:29 AM CDTSevere Thunderstorm WarningTAETaylor16 min
Jul 24, 8:58 AM CDTAreal Flood AdvisoryTAEFranklin, Gulf3 hr
Jul 24, 3:26 PM CDTSpecial Marine WarningTAE34 min
Jul 24, 5:11 PM CDTSpecial Weather StatementTAELeon49 min
Jul 24, 5:16 PM CDTSpecial Marine WarningTAE29 min
Jul 24, 5:17 PM CDTSpecial Weather StatementTAEBay28 min
Jul 24, 6:42 PM CDTSpecial Marine WarningTAE2 hr
Jul 24, 1:52 PM CDTSevere Thunderstorm WarningTAECalhoun, Clay, Early23 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013Every severe thunderstorm warning in 2013

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.