Alert archive / Georgia / Heat Advisories in 2015

Heat Advisory 3, NWS Tallahassee, FL

July 11, 20156 counties in Florida; 13 counties in Georgia; Henry County, Houston County, Alabama

NWS Tallahassee, FL issued this heat advisory at Jul 11, 2015, 1:24 AM CDT for 6 counties in Florida; 13 counties in Georgia; Henry County, Houston County, Alabama. It took effect at Jul 11, 2015, 10:00 AM CDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jul 11, 2015, 1:24 AM CDT (06:24 UTC)
In effect from: Jul 11, 2015, 10:00 AM CDT
Expired: Jul 11, 2015, 7:00 PM CDT
In force: 9 hr
Issued by: NWS Tallahassee, FL

All 21 counties

Henry County, AL, Houston County, AL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Jackson County, FL, Leon County, FL, Wakulla County, FL, Baker County, GA, Calhoun County, GA, Clay County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Quitman County, GA, Randolph County, GA, Seminole County, GA, Terrell County, GA

The radar

The Ft Rucker radar (KEOX), 82 km from the middle of the area, began a volume at 06:21 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.4 hours before the alert went out and 255 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: 121 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 1786 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -21 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 heat advisory 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 heat advisory went out at Jul 10, 8:08 PM CDT, 5 hours 16 minutes earlier.

Area forecast discussion, Jul 10, 8:08 PM CDT, 5 hours 16 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.

Issued	Product	Office	Counties	Lasted
Jul 11, 2:34 PM CDT	Heat Advisory	TAE	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 8 more	27 hr
Jul 11, 4:57 PM CDT	Severe Thunderstorm Warning	TAE	Dixie	23 min

Nearby

Heat Advisories in Georgia, 2015 Heat Advisories in Florida, 2015 Heat Advisories in Alabama, 2015 Every heat advisory in 2015

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.