Alert archive / Georgia / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 295, NWS Atlanta, GA

July 19, 2017Montgomery County, Toombs County, Wheeler County, Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 19, 2017, 10:50 PM EDT for Montgomery County, Toombs County, Wheeler County, Georgia. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 19, 2017, 10:50 PM EDT (02:50 UTC)
Expired: Jul 19, 2017, 11:15 PM EDT
In force: 25 min
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Montgomery County, GA, Toombs County, GA, Wheeler County, GA

The radar

The Robins AFB radar (KJGX), 105 km from the middle of the area, began a volume at 02:50 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.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 11:00 PM EDT	TSTM WND DMG	2 Wnw Long Pond, GA	ABOUT TEN TREES REPORTED DOWN AT THE INTERSECTION OF N OLD RIVER RD AND DEER RUN RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 2.8 hours before the alert went out and 186 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: 1129 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1194 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 21 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

As transmitted.

654 
WUUS52 KFFC 200250
SVRFFC
GAC209-279-309-200315-
/O.NEW.KFFC.SV.W.0295.170720T0250Z-170720T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
1050 PM EDT WED JUL 19 2017

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  West central Toombs County in southeastern Georgia...
  Southeastern Wheeler County in central Georgia...
  Southern Montgomery County in central Georgia...

* Until 1115 PM EDT

* At 1050 PM EDT, a severe thunderstorm was located over Uvalda, or 8
  miles south of Mount Vernon, moving southwest at 15 mph.

  HAZARD...60 mph wind gusts and half dollar size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Uvalda, Alston, Jordan and Charlotteville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If you see wind damage...hail or flooding...wait until the storm has
passed...and then call the National Weather Service toll free
at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at NWSATLANTA.

&&

LAT...LON 3202 8272 3214 8254 3204 8241 3196 8252
      3196 8257 3193 8259 3194 8260 3193 8261
      3192 8265
TIME...MOT...LOC 0250Z 042DEG 12KT 3205 8255 

HAIL...1.25IN
WIND...60MPH
 
$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 10:47 PM EDT	Special Weather Statement	FFC	Wheeler	28 min
Jul 19, 11:14 PM EDT	Special Weather Statement	FFC	Wheeler	31 min
Jul 20, 2:27 PM EDT	Special Weather Statement	FFC	Cherokee	33 min
Jul 20, 5:19 PM EDT	Special Weather Statement	FFC	Harris	26 min
Jul 20, 6:53 PM EDT	Special Weather Statement	FFC	Pike	37 min
Jul 20, 7:17 PM EDT	Special Weather Statement	FFC	Emanuel	28 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2017 Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.