Alert archive / Georgia / Heat Advisories in 2012

Heat Advisory 6, NWS Charleston, SC

July 27, 20128 counties in Georgia; 5 counties in South Carolina

NWS Charleston, SC issued this heat advisory at Jul 27, 2012, 3:29 AM EDT for 8 counties in Georgia; 5 counties in South Carolina. It took effect at Jul 27, 2012, 11:00 AM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 27, 2012, 3:29 AM EDT (07:29 UTC)
In effect from: Jul 27, 2012, 11:00 AM EDT
Expired: Jul 27, 2012, 6:16 PM EDT
In force: 7 hr
Issued by: NWS Charleston, SC

Counties Bulloch County, GA, Candler County, GA, Effingham County, GA, Evans County, GA, Jenkins County, GA, Long County, GA, Screven County, GA, Tattnall County, GA, Allendale County, SC, Berkeley County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC

The radar

The Charleston,SC radar (KCLX), 33 km from the middle of the area, began a volume at 07:35 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 00:00Z, 7.5 hours before the alert went out and 233 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: 2979 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1058 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -20 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 Charleston, SC wrote its last area forecast discussion before this heat advisory went out at Jul 27, 1:35 AM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Jul 27, 1:35 AM EDT, 1 hour 54 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>

Hazardous weather outlook, Jul 26, 7:57 PM EDT, 7 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 Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 27, 2:53 PM EDT	Special Weather Statement	CHS	Bulloch	52 min
Jul 27, 3:00 PM EDT	Severe Thunderstorm Warning	CHS	Bulloch, Evans	47 min
Jul 27, 3:36 PM EDT	Special Weather Statement	CHS	Effingham	39 min
Jul 27, 4:09 PM EDT	Severe Thunderstorm Warning	CHS	Effingham	66 min
Jul 27, 5:51 PM EDT	Special Marine Warning	CHS		84 min
Jul 27, 6:05 PM EDT	Special Weather Statement	CHS	Chatham	40 min
Jul 27, 6:51 PM EDT	Special Marine Warning	CHS		32 min
Jul 27, 7:03 PM EDT	Severe Thunderstorm Warning	CHS	Chatham	37 min
Jul 27, 2:08 PM EDT	Special Weather Statement	CHS	Hampton	37 min
Jul 27, 3:13 PM EDT	Special Weather Statement	CHS	Colleton	47 min
Jul 27, 3:31 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	59 min
Jul 27, 3:52 PM EDT	Special Weather Statement	CHS	Colleton	23 min
Jul 27, 4:18 PM EDT	Special Weather Statement	CHS	Colleton	27 min
Jul 27, 4:54 PM EDT	Severe Thunderstorm Warning	CHS	Allendale, Beaufort, Colleton, Hampton, Jasper	66 min
Jul 27, 5:12 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	51 min
Jul 27, 5:19 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Colleton, Jasper	56 min
Jul 27, 5:32 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton	58 min
Jul 27, 6:21 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton, Dorchester	54 min
Jul 27, 7:35 PM EDT	Special Weather Statement	CHS	Charleston	25 min

Nearby

Heat Advisories in Georgia, 2012 Heat Advisories in South Carolina, 2012 Every heat advisory in 2012

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.