Alert archive / Georgia / Heat Advisories in 2015

Heat Advisory 18, NWS Atlanta, GA

July 29, 201529 counties in Georgia

NWS Atlanta, GA issued this heat advisory at Jul 29, 2015, 2:17 AM EDT for 29 counties in Georgia. It took effect at Jul 29, 2015, 1:00 PM EDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jul 29, 2015, 2:17 AM EDT (06:17 UTC)
In effect from: Jul 29, 2015, 1:00 PM EDT
Expired: Jul 29, 2015, 8:00 PM EDT
In force: 7 hr
Issued by: NWS Atlanta, GA

All 29 counties

Bibb County, GA, Bleckley County, GA, Chattahoochee County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Houston County, GA, Johnson County, GA, Laurens County, GA, Macon County, GA, Marion County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkinson County, GA

The radar

The Robins AFB radar (KJGX), 43 km from the middle of the area, began a volume at 06:14 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, 6.3 hours before the alert went out and 142 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: 1214 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 1648 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 6 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 Atlanta, GA wrote its last area forecast discussion before this heat advisory went out at Jul 29, 1:40 AM EDT, 37 minutes earlier.

Area forecast discussion, Jul 29, 1:40 AM EDT, 37 minutes before

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Hazardous weather outlook, Jul 29, 2:10 AM EDT, 7 minutes before

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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 28, 8:10 PM EDT	Special Weather Statement	FFC	Gwinnett	35 min
Jul 29, 1:48 PM EDT	Special Weather Statement	FFC	Bibb	27 min
Jul 29, 2:56 PM EDT	Special Weather Statement	FFC	Bleckley, Wilkinson	34 min
Jul 29, 3:08 PM EDT	Special Weather Statement	FFC	Walker	37 min
Jul 29, 4:54 PM EDT	Special Weather Statement	FFC	Washington	36 min
Jul 29, 5:23 PM EDT	Special Weather Statement	FFC	Madison	37 min
Jul 29, 6:26 PM EDT	Special Weather Statement	FFC	Upson	34 min
Jul 29, 7:58 PM EDT	Special Weather Statement	FFC	Walker	32 min

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.