Alert archive / Georgia / River Flood Warnings in 2021
River Flood Warning 171, NWS Atlanta, GA
NWS Atlanta, GA issued this river flood warning at Sep 20, 2021, 3:31 PM EDT for Forsyth County, Georgia. It took effect at Sep 20, 2021, 4:59 PM EDT. It was in force for 18 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 20, 2021, 3:31 PM EDT (19:31 UTC)
- In effect from
- Sep 20, 2021, 4:59 PM EDT
- Expired
- Sep 21, 2021, 10:43 AM EDT
- In force
- 18 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- Minor
County Forsyth County, GA
The radar
The Atlanta radar (KFFC), 92 km from the middle of the area, began a volume at 19:31 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 river
Written for the forecast point Big Creek at GA 9 near Cumming (CMGG1). The gauge peaked at 7.59 ft at Sep 21, 2021, 3:00 AM EDT.
- Action stage
- 4 ft
- Minor stage
- 6 ft
- Moderate stage
- 12 ft
- Major stage
- 15 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 02335580, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
236
WGUS42 KFFC 201931
FLWFFC
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Peachtree City GA
331 PM EDT Mon Sep 20 2021
...The National Weather Service in Peachtree City GA has issued a
Flood Warning for the following rivers in Georgia...
Big Creek near Cumming affecting Forsyth County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Additional information is available at weather.gov/atlanta.
&&
GAC117-210400-
/O.NEW.KFFC.FL.W.0171.210920T2059Z-210921T0400Z/
/CMGG1.1.ER.210920T2059Z.210921T0000Z.210921T0233Z.UU/
331 PM EDT Mon Sep 20 2021
The National Weather Service in Peachtree City has issued a
* Flood Warning for
the Big Creek near Cumming.
* Until just after midnight tonight.
* At 2:45 PM EDT Monday the stage was 5.1 feet.
* Flood stage is 6 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to rise above flood stage late
this afternoon to a crest of 6.4 feet this evening. It will then
fall below flood stage late this evening.
* Impact...At 6 feet, Flood stage is reached. Minor flooding will
expand into the natural flood plain of the creek upstream and
downstream from the gage at Atlanta Highway or Georgia Highway 9.
Large portions of the sidewalk and boardwalk of the Big Creek
Greenway will begin to flood. The areas under the Georgia 400
Highway and McFarland Road will be covered with around one foot of
water. A portion of the sidewalk under Majors Road will be covered
with around two feet of water.
&&
LAT...LON 3418 8424 3417 8420 3411 8419 3410 8420
3410 8425 3411 8424
$$4 follow-up statements
236
WGUS82 KFFC 202214
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
614 PM EDT Mon Sep 20 2021
...The Flood Warning is extended for the following rivers in
Georgia...
Big Creek near Cumming affecting Forsyth County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
Additional information is available at weather.gov/atlanta.
&&
GAC117-210845-
/O.EXT.KFFC.FL.W.0171.000000T0000Z-210921T0833Z/
/CMGG1.1.ER.210920T2135Z.210921T0000Z.210921T0233Z.UU/
614 PM EDT Mon Sep 20 2021
...The Flood Warning is now in effect until late tonight...
The Flood Warning continues for
the Big Creek near Cumming.
* Until late tonight.
* At 5:45 PM EDT Monday the stage was 6 feet.
* Flood stage is 6 feet.
* Minor flooding is occurring and minor flooding is forecast to
continue.
* Forecast...The river is expected to rise to a crest of 6.4 feet
this evening. It will then fall below flood stage late this
evening.
* Impact...At 6 feet, Flood stage is reached. Minor flooding will
expand into the natural flood plain of the creek upstream and
downstream from the gage at Atlanta Highway or Georgia Highway 9.
Large portions of the sidewalk and boardwalk of the Big Creek
Greenway will begin to flood. The areas under the Georgia 400
Highway and McFarland Road will be covered with around one foot of
water. A portion of the sidewalk under Majors Road will be covered
with around two feet of water.
&&
LAT...LON 3418 8424 3417 8420 3411 8419 3410 8420
3410 8425 3411 8424
$$850
WGUS82 KFFC 210204
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
1004 PM EDT Mon Sep 20 2021
...The Flood Warning continues for the following rivers in Georgia...
Big Creek near Cumming affecting Forsyth County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at weather.gov/atlanta.
&&
GAC117-210845-
/O.CON.KFFC.FL.W.0171.000000T0000Z-210921T0833Z/
/CMGG1.1.ER.210920T2135Z.210921T0145Z.000000T0000Z.UU/
1004 PM EDT Mon Sep 20 2021
...The Flood Warning remains in effect...
The Flood Warning continues for
the Big Creek near Cumming.
* Until late tonight.
* At 9:45 PM EDT Monday the stage was 6.9 feet.
* Flood stage is 6 feet.
* Minor flooding is occurring.
* Forecast...No forecast is available for this location.
* Impact...At 7 feet, Minor flooding continues to expand into the
natural flood plain of the creek upstream and downstream from the
gage at Atlanta Highway or Georgia Highway 9. Large portions of
the sidewalk and boardwalk of the Big Creek Greenway will be
flooded. The areas under the Georgia 400 Highway and McFarland
Road will be covered with around two feet of water. A portion of
the sidewalk under Majors Road will be covered with around 3 feet
of water.
&&
LAT...LON 3418 8424 3417 8420 3411 8419 3410 8420
3410 8425 3411 8424
$$099
WGUS82 KFFC 210828
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
428 AM EDT Tue Sep 21 2021
...The Flood Warning is extended for the following rivers in
Georgia...
Big Creek near Cumming affecting Forsyth County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Additional information is available at weather.gov/atlanta.
&&
GAC117-212030-
/O.EXT.KFFC.FL.W.0171.000000T0000Z-000000T0000Z/
/CMGG1.1.ER.210920T2135Z.210921T0700Z.000000T0000Z.UU/
428 AM EDT Tue Sep 21 2021
...The Flood Warning is now in effect until further notice...
The Flood Warning continues for
the Big Creek near Cumming.
* Until further notice.
* At 3:45 AM EDT Tuesday the stage was 7.5 feet and nearly steady.
* Flood stage is 6 feet.
* Minor flooding is occurring.
* Forecast...No forecast is available for this location.
* Impact...At 8 feet, minor flooding will expand into the natural
flood plain of the creek upstream and downstream from the gage at
Atlanta Highway or Georgia Highway 9. Most of the sidewalk and
boardwalk of the Big Creek Greenway will be under a foot or two of
water. The areas under the Georgia 400 Highway and McFarland Road
will be covered with around three feet of water. A portion of the
sidewalk under Majors Road will be covered with around four feet
of water.
&&
LAT...LON 3418 8424 3417 8420 3411 8419 3410 8420
3410 8425 3411 8424
$$269
WGUS82 KFFC 211443
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
1043 AM EDT Tue Sep 21 2021
...The Flood Warning is cancelled for the following rivers in
Georgia...
Big Creek near Cumming affecting Forsyth County.
GAC117-211545-
/O.CAN.KFFC.FL.W.0171.000000T0000Z-210921T1443Z/
/CMGG1.1.ER.210920T2135Z.210921T0700Z.210921T1330Z.UU/
1043 AM EDT Tue Sep 21 2021
...The Flood Warning for the Big Creek near Cumming has been
cancelled...
The Flood Warning is cancelled for
the Big Creek near Cumming.
* At 9:45 AM EDT Tuesday the stage was 5.9 feet.
* Flood stage is 6.0 feet.
* Forecast...The river is expected to fall to 4.6 feet this
afternoon.
&&
LAT...LON 3418 8424 3417 8420 3411 8419 3410 8420
3410 8425 3411 8424
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 9:01 AM EDT | Flash Flood Warning | FFC | Bleckley, Dodge, Pulaski | 3 hr |
| Sep 20, 11:03 AM EDT | Flash Flood Warning | FFC | Bleckley, Dodge, Laurens | 3 hr |
| Sep 20, 2:50 PM EDT | River Flood Warning | FFC | Gwinnett | 3 hr |
| Sep 20, 5:52 PM EDT | River Flood Warning | FFC | Dade | 20 hr |
Nearby
River Flood Warnings in Georgia, 2021Every river flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.