Alert archive / Georgia / Areal Flood Warnings in 2014

Areal Flood Warning 5, NWS Atlanta, GA

April 30, 20144 counties in Georgia

NWS Atlanta, GA issued this areal flood warning at Apr 30, 2014, 3:55 AM EDT for 4 counties in 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: Apr 30, 2014, 3:55 AM EDT (07:55 UTC)
Expired: Apr 30, 2014, 9:45 AM EDT
In force: 6 hr
Issued by: NWS Atlanta, GA
Area: Storm-based polygon
Flood severity: None

Counties Chattahoochee County, GA, Marion County, GA, Stewart County, GA, Webster County, GA

The radar

The Maxwell AFB radar (KMXX), 111 km from the middle of the area, began a volume at 07:56 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 00:00Z, 7.9 hours before the alert went out and 204 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: 124 J/kg
Mixed-layer CIN: -255 J/kg
Mixed-layer LCL: 1698 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Apr 30, 1:40 AM EDT, 2 hours 15 minutes earlier.

Area forecast discussion, Apr 30, 1:40 AM EDT, 2 hours 15 minutes before

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Hazardous weather outlook, Apr 29, 9:00 PM EDT, 6 hours 55 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
900 PM EDT TUE APR 29 2014

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-301930-
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-
900 PM EDT TUE APR 29 2014

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

.DAY ONE...REST OF TONIGHT...

...ISOLATED SEVERE THUNDERSTORMS POSSIBLE OVERNIGHT...
...A FLOOD WATCH CONTINUES THROUGH TONIGHT...

.WEATHER HAZARDS EXPECTED...
DAMAGING WINDS...ISOLATED TORNADOES...AND FREQUENT LIGHTNING.
HEAVY RAIN AND MINOR RIVER FLOODING IS ALSO EXPECTED.

.DISCUSSION...
A LARGE COMPLEX OF STORMS ALONG THE MISSISSIPPI AND ALABAMA COAST HAS
DECREASED INSTABILITY AND LOW LEVEL VERTICAL WIND SHEAR ACROSS
ALABAMA AND GEORGIA THIS AFTERNOON AND EVENING. WHILE A FEW ISOLATED
SEVERE STORMS WILL BE POSSIBLE...THE OVERALL THREAT FOR SEVERE
WEATHER HAS DECREASED FROM EARLIER THOUGHT. HEAVY RAIN AND MINOR
FLOODING STILL REMAINS LIKELY LATER TONIGHT...HOWEVER THE THREAT FOR
SERIOUS FLOODING HAS ALSO DIMINISHED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

THE RISK FOR ISOLATED SEVERE THUNDERSTORMS...HEAVY RAIN AND MINOR
FLOODING WILL CONTINUE ON WEDNESDAY...MAINLY OVER MIDDLE GEORGIA.
THE THREAT SHOULD END AFTER SUNSET ACROSS THE STATE.

.SPOTTER INFORMATION STATEMENT...

WITH NIGHTFALL AND LOWERING THREAT LEVELS...SPOTTER ACTIVATION IS
NOW OPTIONAL. SPOTTERS CAN ALWAYS A REPORT FROM HOME OR WHILE MOBILE
AT OUR WEBSITE AT WEATHER.GOV/ATLANTA.

In the hours before

Special weather statement, Apr 30, 1:41 AM EDT, 2 hours 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
141 AM EDT WED APR 30 2014

GAZ102-300630-
141 AM EDT WED APR 30 2014

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS AND HEAVY RAIN IN
STEWART COUNTY UNTIL 230 AM EDT...

AT 140 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM ABOUT 8 MILES SOUTHWEST OF SANFORD... AND MOVING
NORTHEAST AT 35 MPH.

WIND GUSTS TO 40 MPH AND LOCALLY HEAVY RAIN ARE EXPECTED WITH THIS
STORM. RAINFALL AMOUNTS BETWEEN 1 AND 2 INCHES ARE POSSIBLE OVER THE
NEXT 1 TO 2 HOURS. DRIVERS SHOULD USE CAUTION AS INTENSE RAINFALL
WILL REDUCE VISIBILITIES. BRIEF PONDING OF WATER ON ROADWAYS IS
LIKELY.

&&

LAT...LON 3192 8492 3195 8497 3197 8497 3197 8504
      3200 8507 3209 8506 3213 8507 3220 8498
      3223 8497 3224 8492 3222 8481 3223 8465
      3218 8463 3216 8465 3206 8464 3192 8466
TIME...MOT...LOC 0539Z 235DEG 35KT 3195 8502

Special weather statement, Apr 30, 2:44 AM EDT, 1 hour 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
244 AM EDT WED APR 30 2014

GAZ090-102-300800-
244 AM EDT WED APR 30 2014

...SIGNIFICANT WEATHER ADVISORY FOR 35 MPH WINDS IN STEWART AND
CHATTAHOOCHEE COUNTIES UNTIL 400 AM EDT...

AT 240 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF HEAVY SHOWERS AND THUNDERSTORM THAT STRETCHED FROM NEAR
LOUVALE AND CHARLES IN CENTRAL STEWART COUNTY... SOUTHWARD TO FORT
GAINES AND AREAS FURTHER SOUTH. THESE SHOWERS AND THUNDERSTORMS ARE
MOVING TO THE NORTHEAST AT 35 MPH AND WILL CONTINUE TO TRAIN OVER
MUCH OF STEWART AND CHATTAHOOCHEE COUNTIES THROUGH 4 AM EDT.

WIND GUSTS TO 35 MPH AND LOCALLY HEAVY RAIN ARE EXPECTED WITH THESE
STORMS. RAINFALL AMOUNTS BETWEEN 1 AND 2 INCHES WITH LOCALLY HIGHER
AMOUNTS ARE LIKELY OVER THE NEXT 2 HOURS. DRIVERS SHOULD USE CAUTION
AS INTENSE RAINFALL WILL REDUCE VISIBILITIES. PONDING OF WATER ON
ROADWAYS IS LIKELY. DO NOT ATTEMPT TO DRIVE ACROSS WATER COVERED
ROADS. YOUR VEHICLE COULD BE SWEPT DOWN STREAM.

&&

LAT...LON 3193 8494 3197 8497 3197 8504 3200 8507
      3213 8507 3226 8490 3232 8500 3235 8501
      3238 8498 3237 8495 3241 8488 3242 8477
      3251 8472 3253 8464 3224 8466 3218 8463
      3216 8465 3192 8465 3191 8482
TIME...MOT...LOC 0638Z 209DEG 29KT 3213 8488

Special weather statement, Apr 30, 3:09 AM EDT, 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
309 AM EDT WED APR 30 2014

GAZ091-103-300800-
309 AM EDT WED APR 30 2014

...SIGNIFICANT WEATHER ADVISORY FOR 35 MPH WINDS IN WEBSTER AND
MARION COUNTIES UNTIL 400 AM EDT...

AT 309 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF HEAVY SHOWERS AND THUNDERSTORM THAT STRETCHED FROM NEAR
SEMINOLE... SOUTHWARD TO CUTHBERT AND BEYOND. THESE SHOWERS AND
THUNDERSTORMS ARE MOVING TO THE NORTHEAST AT 40 MPH... AND WILL
CONTINUE TO TRAIN OVER MUCH OF WEBSTER AND MARION COUNTIES THROUGH 4
AM EDT.

OCCASIONAL LIGHTNING... WIND GUSTS TO 35 MPH AND LOCALLY HEAVY RAIN
ARE EXPECTED WITH THESE STORMS. RAINFALL AMOUNTS BETWEEN 1 AND 2
INCHES WITH LOCALLY HIGHER AMOUNTS ARE LIKELY OVER THE NEXT 2 HOURS.
DRIVERS SHOULD USE CAUTION AS INTENSE RAINFALL WILL REDUCE
VISIBILITIES. PONDING OF WATER ON ROADWAYS IS LIKELY. DO NOT ATTEMPT
TO DRIVE ACROSS WATER COVERED ROADS. YOUR VEHICLE COULD BE SWEPT
DOWN STREAM.

&&

LAT...LON 3192 8465 3216 8465 3218 8463 3224 8466
      3249 8466 3253 8464 3252 8457 3255 8456
      3256 8445 3250 8444 3243 8439 3230 8439
      3230 8441 3223 8441 3223 8443 3193 8445
      3191 8446
TIME...MOT...LOC 0706Z 204DEG 46KT 3225 8458

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 1:41 AM EDT	Special Weather Statement	FFC	Stewart	49 min
Apr 30, 2:44 AM EDT	Special Weather Statement	FFC	Chattahoochee, Stewart	76 min
Apr 30, 3:09 AM EDT	Special Weather Statement	FFC	Marion, Webster	51 min
Apr 30, 4:08 AM EDT	Wind Advisory	FFC	Bibb, Bleckley, Butts, Carroll, Chattahoochee, Clayton and 43 more	8 hr
Apr 30, 4:43 AM EDT	Special Weather Statement	FFC	Crawford, Crisp, Dooly, Houston, Macon, Peach and 3 more	77 min
Apr 30, 6:26 AM EDT	Special Weather Statement	FFC	Crawford, Crisp, Dooly, Houston, Macon, Peach and 5 more	94 min

Nearby

Areal Flood Warnings in Georgia, 2014 Every areal flood warning in 2014

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.