Alert archive / Georgia / Areal Flood Warnings in 2015

Areal Flood Warning 33, NWS Atlanta, GA

December 25, 2015Floyd County, Gordon County, Georgia

NWS Atlanta, GA issued this areal flood warning at Dec 25, 2015, 10:32 PM EST for Floyd County, Gordon 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: Dec 25, 2015, 10:32 PM EST (03:32 UTC)
Expired: Dec 26, 2015, 4:30 AM EST
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Floyd County, GA, Gordon County, GA

The radar

The Northeast Alabama radar (KHTX), 113 km from the middle of the area, began a volume at 03:33 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 00:00Z, 3.5 hours before the alert went out and 123 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: 578 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.9

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 Dec 25, 10:32 PM EST, 0 minutes earlier.

Area forecast discussion, Dec 25, 10:32 PM EST, 0 minutes before

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Hazardous weather outlook, Dec 25, 10:06 PM EST, 26 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
1006 PM EST FRI DEC 25 2015

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-261915-
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-
1006 PM EST FRI DEC 25 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH AND CENTRAL
GEORGIA.

.DAY ONE...TONIGHT...

...FLOODING WILL PERSIST ACROSS MUCH OF CENTRAL AND NORTH GEORGIA...

MODERATE TO LOCALLY HEAVY RAIN WILL PERSIST ACROSS MUCH OF WEST
CENTRAL AND NORTHWEST GEORGIA THROUGH THE NIGHT. ADDITIONAL RAINFALL
OF 1/2 TO 1 INCH CAN BE EXPECTED...WITH LOCALLY HIGHER AMOUNTS
POSSIBLE...GENERALLY ALONG AND WEST OF I-85. ONGOING FLOODING OF
RIVERS...STREAMS AND CREEKS WILL CONTINUE FROM EXCESSIVE RUNOFF AND
PREVIOUSLY SATURATED SOILS ACROSS MUCH OF NORTH AND CENTRAL GEORGIA.

IN ADDITION...DENSE FOG WILL OVERSPREAD PORTIONS OF CENTRAL
GEORGIA...GENERALLY SOUTH OF A HAMILTON TO FORSYTH TO WASHINGTON
LINE. EXPECT VISIBILITIES TO BE REDUCED TO LESS THAN 1/4 MILE AT
TIMES IN THESE AREAS WHICH WILL MAKE TRAVEL DIFFICULT OVERNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

THE HEAVIEST RAIN WILL GRADUALLY PUSH NORTH OF THE AREA BY SATURDAY
BUT THERE WILL STILL BE A CHANCE FOR SHOWERS AND A FEW THUNDERSTORMS
INTO THE FIRST OF THE WEEK. SEVERAL RIVERS AND STREAMS COULD REMAIN
IN FLOOD THROUGH THIS WEEKEND AND INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT REQUESTED BUT SPOTTERS ARE ENCOURAGED TO
SUBMIT REPORTS OF SEVERE WEATHER THROUGH THE WEB BY GOING TO
WEATHER.GOV/ATLANTA.

DJN

In the hours before

Local storm report, Dec 25, 7:56 PM EST, 2 hours 36 minutes before

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Local storm report, Dec 25, 10:20 PM EST, 12 minutes before

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Local storm report, Dec 25, 10:24 PM EST, 8 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
Dec 25, 8:30 PM EST	Areal Flood Warning	FFC	Catoosa, Dade, Walker	12 hr
Dec 25, 8:31 PM EST	River Flood Warning	FFC	Chattooga	39 hr
Dec 25, 8:43 PM EST	Areal Flood Warning	FFC	Murray, Whitfield	12 hr
Dec 25, 8:57 PM EST	Areal Flood Warning	FFC	Chattooga	12 hr
Dec 25, 9:04 PM EST	Areal Flood Warning	FFC	Fannin, Gilmer	12 hr
Dec 25, 9:22 PM EST	Dense Fog Advisory	FFC	Baldwin, Bibb, Bleckley, Chattahoochee, Crawford, Crisp and 40 more	15 hr
Dec 26, 6:22 AM EST	River Flood Warning	FFC	Butts, Jasper	24 hr
Dec 26, 7:08 AM EST	River Flood Warning	FFC	Cherokee	24 hr
Dec 26, 7:35 AM EST	River Flood Warning	FFC	Floyd	7 days

Nearby

Areal Flood Warnings in Georgia, 2015 Every areal flood warning in 2015

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.