Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Atlanta, GA

September 21, 2017Montgomery County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 21, 2017, 4:43 PM EDT for Montgomery County, Georgia. It was in force for 32 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 21, 2017, 4:43 PM EDT (20:43 UTC)
Expired
Sep 21, 2017, 5:15 PM EDT
In force
32 min
Issued by
NWS Atlanta, GA
Hail
0.25 in
Wind
40

County Montgomery County, GA

The radar

The Robins AFB radar (KJGX), 82 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.7 hours before the alert went out and 214 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 12:00Z on 2017-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 375 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 12:00Z on 2017-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
375 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1335 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 21, 3:09 PM EDT, 1 hour 34 minutes earlier.

Area forecast discussion, Sep 21, 3:09 PM EDT, 1 hour 34 minutes before
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Hazardous weather outlook, Sep 21, 1:45 PM EDT, 2 hours 58 minutes before
Hazardous Weather Outlook...Updated
National Weather Service Peachtree City GA
145 PM EDT Thu Sep 21 2017

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-221000-
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-
145 PM EDT Thu Sep 21 2017

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

.DAY ONE...This afternoon and Tonight...

The probability for widespread hazardous weather is low.

Isolated to widely scattered thunderstorms are possible through this
evening, but most areas will remain dry. The primary hazards will be
locally heavy rain, cloud to ground lightning, and brief gusty
winds.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday...

There is a chance of thunderstorms Friday and Saturday, mainly
during the afternoon and evening. The primary hazards will be
lightning, along with brief heavy rain and gusty winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

In the hours before

Special weather statement, Sep 21, 4:43 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 21, 4:56 PM EDTSpecial Weather StatementFFCBanks34 min
Sep 21, 5:16 PM EDTSpecial Weather StatementFFCMontgomery, Wheeler29 min
Sep 21, 5:27 PM EDTSpecial Weather StatementFFCLaurens33 min
Sep 21, 5:41 PM EDTSevere Thunderstorm WarningFFCTelfair, Wheeler34 min
Sep 21, 5:53 PM EDTSpecial Weather StatementFFCJohnson37 min
Sep 21, 5:56 PM EDTSevere Thunderstorm WarningFFCDodge, Telfair34 min
Sep 21, 5:57 PM EDTSpecial Weather StatementFFCDodge33 min
Sep 21, 6:09 PM EDTSpecial Weather StatementFFCDawson36 min
Sep 21, 6:12 PM EDTSpecial Weather StatementFFCJohnson33 min
Sep 21, 6:27 PM EDTSpecial Weather StatementFFCJohnson33 min
Sep 21, 6:40 PM EDTSevere Thunderstorm WarningFFCEmanuel, Johnson50 min
Sep 21, 6:42 PM EDTSpecial Weather StatementFFCPulaski33 min
Sep 21, 6:59 PM EDTSevere Thunderstorm WarningFFCPulaski, Wilcox31 min
Sep 21, 7:30 PM EDTSpecial Weather StatementFFCPulaski30 min
Sep 21, 7:36 PM EDTSpecial Weather StatementFFCWilkinson24 min

Nearby

Special Weather Statements in Georgia, 2017Every 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.