Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Atlanta, GA

September 11, 2017Wilkes County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 11, 2017, 9:08 PM EDT for Wilkes County, Georgia. It was in force for 37 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 11, 2017, 9:08 PM EDT (01:08 UTC)
Expired: Sep 11, 2017, 9:45 PM EDT
In force: 37 min
Issued by: NWS Atlanta, GA

County Wilkes County, GA

The radar

The Greer radar (KGSP), 133 km from the middle of the area, began a volume at 01:11 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

Charleston AFB, SC (KCHS), launched 00:00Z, 1.1 hours before the alert went out and 260 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: 458 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 334 m²/s²
0-3 km storm-relative helicity: 383 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Sep 11, 1:43 PM EDT, 7 hours 25 minutes earlier.

Area forecast discussion, Sep 11, 1:43 PM EDT, 7 hours 25 minutes before

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Hazardous weather outlook, Sep 11, 6:40 PM EDT, 2 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
640 PM EDT Mon Sep 11 2017

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-121000-
Baldwin-Banks-Barrow-Bartow-Bibb-Bleckley-Butts-Carroll-Catoosa-
Chattahoochee-Chattooga-Cherokee-Clarke-Clayton-Cobb-Coweta-
Crawford-Crisp-Dade-Dawson-DeKalb-Dodge-Dooly-Douglas-Emanuel-
Fannin-Fayette-Floyd-Forsyth-Gilmer-Glascock-Gordon-Greene-
Gwinnett-Hall-Hancock-Haralson-Harris-Heard-Henry-Houston-Jackson-
Jasper-Jefferson-Johnson-Jones-Lamar-Laurens-Lumpkin-Macon-
Madison-Marion-Meriwether-Monroe-Montgomery-Morgan-Murray-
Muscogee-Newton-North Fulton-Oconee-Oglethorpe-Paulding-Peach-
Pickens-Pike-Polk-Pulaski-Putnam-Rockdale-Schley-South Fulton-
Spalding-Stewart-Sumter-Talbot-Taliaferro-Taylor-Telfair-Toombs-
Towns-Treutlen-Troup-Twiggs-Union-Upson-Walker-Walton-Warren-
Washington-Webster-Wheeler-White-Whitfield-Wilcox-Wilkes-
Wilkinson-
640 PM EDT Mon Sep 11 2017

This Hazardous Weather Outlook is for portions of North and
Central Georgia.

.DAY ONE...Tonight...

Tropical storm warnings remain in effect, and a flash flood watch is
also in effect for all of north and central Georgia through tonight.

Tropical Storm Irma will continue to move across middle Georgia and
eventually into northern Alabama tonight. Tropical storm-force wind
gusts will persist through this evening across much of central and
north Georgia. The highest wind gusts will be over the higher
elevations of north Georgia, and associated with heavier rain bands.
An additional 1 to 3 inches of rain can be expected, on top of the 2
to 5 inches that has already occurred. This will increase the flood
potential for several creeks and streams this evening.

Continue to refer to the latest official tracks and advisories
issued by the National Hurricane Center, as well as our Hurricane
Local Statements, and web site, for the latest on Irma.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

Remnants from Irma will result in gusty winds and scattered showers
Tuesday, otherwise the probability for widespread hazardous
weather through the weekend is low, at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested but spotters are encouraged to
submit reports of severe weather, wind damage, or flooding through
the web by going to weather.gov/atlanta.

In the hours before

Local storm report, Sep 11, 7:44 PM EDT, 1 hour 24 minutes before

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Special weather statement, Sep 11, 7:46 PM EDT, 1 hour 22 minutes before

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Local storm report, Sep 11, 7:49 PM EDT, 1 hour 19 minutes before

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Local storm report, Sep 11, 7:53 PM EDT, 1 hour 15 minutes before

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Local storm report, Sep 11, 7:54 PM EDT, 1 hour 14 minutes before

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Local storm report, Sep 11, 7:55 PM EDT, 1 hour 13 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
Sep 11, 8:06 PM EDT	Special Weather Statement	FFC	Lamar, Monroe	24 min
Sep 11, 8:15 PM EDT	Special Weather Statement	FFC	Jones, Monroe	30 min
Sep 11, 8:21 PM EDT	Special Weather Statement	FFC	Putnam	24 min
Sep 11, 8:41 PM EDT	Special Weather Statement	FFC	Butts	34 min
Sep 11, 9:04 PM EDT	Special Weather Statement	FFC	Hancock	26 min
Sep 11, 9:05 PM EDT	Flash Flood Warning	FFC	Catoosa, Fannin, Gilmer, Murray, Whitfield	6 hr
Sep 11, 9:38 PM EDT	Special Weather Statement	FFC	Jasper	37 min
Sep 11, 10:56 PM EDT	Wind Advisory	FFC	Baldwin, Banks, Barrow, Bartow, Butts, Carroll and 59 more	4 hr
Sep 12, 4:02 AM EDT	River Flood Warning	FFC	Carroll, Coweta, Heard	34 hr
Sep 12, 4:18 AM EDT	River Flood Warning	FFC	Cobb, Douglas	44 hr
Sep 12, 4:23 AM EDT	River Flood Warning	FFC	Bibb, Houston, Jones, Monroe, Twiggs	3 days
Sep 12, 4:23 AM EDT	River Flood Warning	FFC	Johnson, Washington, Wilkinson	24 hr
Sep 12, 8:41 AM EDT	River Flood Warning	FFC	Gwinnett	12 hr

Nearby

Special Weather Statements in Georgia, 2017 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.