Alert archive / Georgia / Areal Flood Warnings in 2018

Areal Flood Warning 1, NWS Atlanta, GA

May 30, 2018Towns County, White County, Georgia

NWS Atlanta, GA issued this areal flood warning at May 30, 2018, 1:01 PM EDT for Towns County, White County, Georgia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 30, 2018, 1:01 PM EDT (17:01 UTC)
Expired
May 30, 2018, 7:00 PM EDT
In force
6 hr
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Flood severity
None

Counties Towns County, GA, White County, GA

The radar

The Greer radar (KGSP), 139 km from the middle of the area, began a volume at 17:01 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, 5.0 hours before the alert went out and 172 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 2018-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 2018-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
10 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
931 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at May 30, 10:39 AM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, May 30, 10:39 AM EDT, 2 hours 22 minutes before
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Hazardous weather outlook, May 30, 5:00 AM EDT, 8 hours 1 minute before
Hazardous Weather Outlook
National Weather Service Peachtree City GA
500 AM EDT Wed May 30 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-311000-
Dade-Walker-Catoosa-Whitfield-Murray-Fannin-Gilmer-Union-Towns-
Chattooga-Gordon-Pickens-Dawson-Lumpkin-White-Floyd-Bartow-
Cherokee-Forsyth-Hall-Banks-Jackson-Madison-Polk-Paulding-Cobb-
North Fulton-Gwinnett-Barrow-Clarke-Oconee-Oglethorpe-Wilkes-
Haralson-Carroll-Douglas-South Fulton-DeKalb-Rockdale-Walton-
Newton-Morgan-Greene-Taliaferro-Heard-Coweta-Fayette-Clayton-
Spalding-Henry-Butts-Jasper-Putnam-Hancock-Warren-Troup-
Meriwether-Pike-Upson-Lamar-Monroe-Jones-Baldwin-Washington-
Glascock-Jefferson-Harris-Talbot-Taylor-Crawford-Bibb-Twiggs-
Wilkinson-Johnson-Emanuel-Muscogee-Chattahoochee-Marion-Schley-
Macon-Peach-Houston-Bleckley-Laurens-Treutlen-Stewart-Webster-
Sumter-Dooly-Crisp-Pulaski-Wilcox-Dodge-Telfair-Wheeler-
Montgomery-Toombs-
500 AM EDT Wed May 30 2018

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

.DAY ONE...Today and Tonight...

Numerous showers and scattered thunderstorms can be expected
today into tonight. A few storms could be strong with gusty winds,
frequent lightning and locally heavy rainfall. A Flash Flood Watch
remains in effect for north Georgia from Floyd to Hall county
and north. Refer to the Flash Flood Watch /ATLFFAFFC/ on the web
for more information.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

Scattered to numerous thunderstorms can be expected Wednesday
through Sunday with scattered thunderstorms Monday and Tuesday.
Most storms will favor the afternoon and evening hours.
On any given day, a few storms could be strong with gusty winds,
frequent lightning and locally heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed at this time, but spotters are
encouraged to submit reports of any severe or significant weather and
flooding through the web by going to weather.gov/atlanta.

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 8:30 PM EDTSpecial Weather StatementFFCChattooga, Dade, Walker45 min
May 29, 9:18 PM EDTSpecial Weather StatementFFCCatoosa, Chattooga, Dade, Floyd, Walker57 min
May 29, 9:33 PM EDTSpecial Weather StatementFFCHall42 min
May 29, 9:55 PM EDTRiver Flood WarningFFCGwinnett2 hr
May 29, 11:10 PM EDTSpecial Weather StatementFFCTowns, White50 min
May 29, 11:56 PM EDTFlash Flood WarningFFCTowns, White13 hr
May 30, 12:47 AM EDTSpecial Weather StatementFFCCarroll, Haralson, Paulding, Polk43 min
May 30, 1:07 AM EDTRiver Flood WarningFFCTowns7 hr
May 30, 1:32 AM EDTRiver Flood WarningFFCWhite4 hr
May 30, 2:23 AM EDTRiver Flood WarningFFCGwinnett, Walton4 hr
May 30, 2:33 AM EDTRiver Flood WarningFFCTowns24 hr
May 30, 9:31 AM EDTRiver Flood WarningFFCGwinnett11 hr
May 30, 4:40 PM EDTSpecial Weather StatementFFCLaurens35 min
May 30, 6:37 PM EDTSpecial Weather StatementFFCJohnson23 min
May 30, 6:39 PM EDTSpecial Weather StatementFFCMadison51 min
May 30, 6:56 PM EDTSpecial Weather StatementFFCGreene34 min

Nearby

Areal Flood Warnings in Georgia, 2018Every areal flood warning in 2018

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.