Alert archive / Georgia / Heat Advisories in 2015

Heat Advisory 11, NWS Atlanta, GA

July 16, 201517 counties in Georgia

NWS Atlanta, GA issued this heat advisory at Jul 16, 2015, 3:29 AM EDT for 17 counties in Georgia. It took effect at Jul 16, 2015, 12:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 16, 2015, 3:29 AM EDT (07:29 UTC)
In effect from: Jul 16, 2015, 12:00 PM EDT
Expired: Jul 16, 2015, 7:00 PM EDT
In force: 7 hr
Issued by: NWS Atlanta, GA

Counties Bleckley County, GA, Dodge County, GA, Emanuel County, GA, Glascock County, GA, Jefferson County, GA, Johnson County, GA, Laurens County, GA, Montgomery County, GA, Pulaski County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Washington County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 50 km from the middle of the area, began a volume at 07:28 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 00:00Z, 7.5 hours before the alert went out and 267 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: 1465 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 1137 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 133 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.3

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 Atlanta, GA wrote its last area forecast discussion before this heat advisory went out at Jul 16, 1:45 AM EDT, 1 hour 44 minutes earlier.

Area forecast discussion, Jul 16, 1:45 AM EDT, 1 hour 44 minutes before

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Hazardous weather outlook, Jul 15, 6:55 PM EDT, 8 hours 34 minutes before

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In the hours before

Special weather statement, Jul 15, 10:22 PM EDT, 5 hours 7 minutes before

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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 8:10 PM EDT	Special Weather Statement	FFC	Chattahoochee	35 min
Jul 15, 8:44 PM EDT	Special Weather Statement	FFC	Webster	31 min
Jul 15, 10:22 PM EDT	Special Weather Statement	FFC	Dooly	53 min
Jul 16, 4:19 PM EDT	Heat Advisory	FFC	Dodge, Emanuel, Johnson, Laurens, Montgomery, Telfair and 3 more	27 hr

Nearby

Heat Advisories in Georgia, 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.