Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Atlanta, GA

September 11, 2017Bibb County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 11, 2017, 7:35 PM EDT for Bibb County, Georgia. It was in force for 25 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, 7:35 PM EDT (23:35 UTC)
Expired
Sep 11, 2017, 8:00 PM EDT
In force
25 min
Issued by
NWS Atlanta, GA

County Bibb County, GA

The radar

The Robins AFB radar (KJGX), 37 km from the middle of the area, began a volume at 23:38 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 12:00Z, 11.6 hours before the alert went out and 280 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, Tallahassee Rgnl, FL at 12:00Z on 2017-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tallahassee Rgnl, FL at 12:00Z on 2017-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
961 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
47 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 11, 1:43 PM EDT, 5 hours 52 minutes earlier.

Area forecast discussion, Sep 11, 1:43 PM EDT, 5 hours 52 minutes before
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Hazardous weather outlook, Sep 11, 6:40 PM EDT, 55 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, 7:22 PM EDT, 13 minutes before
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Local storm report, Sep 11, 7:28 PM EDT, 7 minutes before
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Local storm report, Sep 11, 7:30 PM EDT, 5 minutes before
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Local storm report, Sep 11, 7:32 PM EDT, 3 minutes before
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Local storm report, Sep 11, 7:34 PM EDT, 1 minute before
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Special weather statement, Sep 11, 7:35 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 11, 1:46 PM EDTFlash Flood WarningFFCEmanuel, Jefferson, Johnson, Treutlen6 hr
Sep 11, 2:29 PM EDTSpecial Weather StatementFFCEmanuel31 min
Sep 11, 2:39 PM EDTSpecial Weather StatementFFCBleckley36 min
Sep 11, 3:05 PM EDTSpecial Weather StatementFFCLaurens25 min
Sep 11, 3:37 PM EDTSpecial Weather StatementFFCLaurens23 min
Sep 11, 7:03 PM EDTSpecial Weather StatementFFCGlascock, Jefferson27 min
Sep 11, 7:20 PM EDTSpecial Weather StatementFFCWilkinson25 min
Sep 11, 7:46 PM EDTSpecial Weather StatementFFCJones29 min
Sep 11, 7:57 PM EDTRiver Flood WarningFFCForsyth, Fulton58 hr

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.