Alert archive / Georgia / Winter Weather Advisories in 2016

Winter Weather Advisory 4, NWS Atlanta, GA

January 21, 20164 counties in Georgia

NWS Atlanta, GA issued this winter weather advisory at Jan 21, 2016, 4:17 AM EST for 4 counties in Georgia. It took effect at Jan 22, 2016, 1:00 AM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 21, 2016, 4:17 AM EST (09:17 UTC)
In effect from: Jan 22, 2016, 1:00 AM EST
Expired: Jan 21, 2016, 11:56 AM EST
In force
Issued by: NWS Atlanta, GA

Counties Lumpkin County, GA, Towns County, GA, Union County, GA, White County, GA

The radar

The Greer radar (KGSP), 151 km from the middle of the area, began a volume at 09:23 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

Nashville Metro, TN (KBNA), launched 00:00Z, 9.3 hours before the alert went out and 292 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: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 501 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 130 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 winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this winter weather advisory went out at Jan 21, 12:36 AM EST, 3 hours 41 minutes earlier.

Area forecast discussion, Jan 21, 12:36 AM EST, 3 hours 41 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, Jan 20, 8:45 PM EST, 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 Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 21, 3:40 AM EST	Wind Advisory	FFC	Catoosa, Chattooga, Dade, Dawson, Fannin, Gilmer and 8 more	28 hr
Jan 21, 4:17 AM EST	Winter Storm Warning	FFC	Banks, Catoosa, Dade, Dawson, Fannin, Gilmer and 12 more	57 hr
Jan 21, 2:57 PM EST	Flood Watch	FFC	Banks, Barrow, Bartow, Carroll, Catoosa, Chattooga and 32 more	29 hr
Jan 21, 3:11 PM EST	Winter Weather Advisory	FFC	Barrow, Bartow, Butts, Carroll, Chattooga, Cherokee and 32 more	46 hr

Nearby

Winter Weather Advisories in Georgia, 2016 Every winter weather advisory in 2016

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.