Alert archive / Georgia / River Flood Warnings in 2020
River Flood Warning 475, NWS Atlanta, GA
NWS Atlanta, GA issued this river flood warning at Nov 12, 2020, 6:40 AM EST for Forsyth County, Fulton County, Georgia. It was in force for 30 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 12, 2020, 6:40 AM EST (11:40 UTC)
- Expired
- Nov 13, 2020, 12:57 PM EST
- In force
- 30 hr
- Issued by
- NWS Atlanta, GA
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Forsyth County, GA, Fulton County, GA
The radar
The Atlanta radar (KFFC), 83 km from the middle of the area, began a volume at 11:41 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 near Alpharetta (APHG1). The gauge peaked at 7.91 ft at Nov 13, 2020, 4:00 AM EST.
- Action stage
- 6 ft
- Minor stage
- 7 ft
- Moderate stage
- 11 ft
- Major stage
- 13 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 02335700, 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.
225
WGUS42 KFFC 121140
FLWFFC
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Peachtree City GA
640 AM EST Thu Nov 12 2020
...The National Weather Service in Peachtree City GA has issued a
Flood Warning for the following rivers in Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
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.
GAC117-121-122230-
/O.NEW.KFFC.FL.W.0475.201112T1140Z-201112T2218Z/
/APHG1.1.ER.201112T0427Z.201112T1045Z.201112T1617Z.NO/
640 AM EST Thu Nov 12 2020
The National Weather Service in Peachtree City has issued a
* Flood Warning for
the Big Creek near Alpharetta.
* From this morning to this afternoon.
* At 5:45 AM EST Thursday the stage was 7.6 feet.
* Flood stage is 7 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to fall below flood stage late
this morning and continue falling to 2.8 feet Monday evening.
* Impact...At 8 feet, Minor flooding continues to expand further
into the woodlands and fields along the creek from near Cumming in
south Forsyth County to Alpharetta and Roswell in north Fulton
County. Additional portions of The Big Creek Greenway have minor
flooding with 1 to 2 feet of water. Most of the walking and biking
paths will be closed...especially upstream and downstream from the
gage on Kimball Bridge Road and near Rock Mill Park. Portions of
the YMCA Campground off Preston Ridge Road will flood.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$5 follow-up statements
993
WGUS82 KFFC 121409
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
909 AM EST Thu Nov 12 2020
...The Flood Warning is extended for the following rivers in
Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
...The Flood Warning continues for the following rivers in Georgia...
Big Creek near Cumming affecting Forsyth County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
Caution is urged when walking near river banks.
Additional information is available at weather.gov/atlanta.
GAC117-121-130215-
/O.EXT.KFFC.FL.W.0475.000000T0000Z-201114T0400Z/
/APHG1.1.ER.201112T0427Z.201113T0000Z.201113T2200Z.NO/
909 AM EST Thu Nov 12 2020
...The Flood Warning is now in effect until late Friday evening...
The Flood Warning continues for
the Big Creek near Alpharetta.
* Until Friday evening.
* At 8:45 AM EST Thursday the stage was 7.7 feet, and rising.
* Flood stage is 7 feet.
* Minor flooding is occurring, and minor flooding is forecast to
continue.
* Forecast...The creek is expected to rise, cresting around 8.1 feet
this evening. The creek is then forecast to fall below flood stage
Friday afternoon.
* Impact...At 7 feet, minor flooding of woodlands and fields begin
along the creek from Cumming in Forsyth County to Alpharetta and
Roswell in North Fulton County. Flooding starts to effect portions
of The Big Creek Greenway near Alpharetta and some portions may
become closed with around one foot of water, especially upstream
and downstream from the gage on Kimball Bridge Road and near Rock
Mill Park. Portions of the YMCA Campground off Preston Ridge Road
will begin to flood.
* Impact...At 8 feet, minor flooding continues to expand further
into the woodlands and fields along the creek from near Cumming in
south Forsyth County to Alpharetta and Roswell in north Fulton
County. Additional portions of The Big Creek Greenway have minor
flooding with 1 to 2 feet of water. Most of the walking and biking
paths will be closed, especially upstream and downstream from the
gage on Kimball Bridge Road and near Rock Mill Park. Larger
portions of the YMCA Campground off Preston Ridge Road will flood.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$
GAC117-122200-
/O.EXT.KFFC.FL.W.0471.000000T0000Z-201112T2155Z/
/CMGG1.1.ER.201112T0802Z.201112T1245Z.201112T1554Z.UU/
909 AM EST Thu Nov 12 2020
...Forecast flooding changed to Minor severity and increased in
duration until late this afternoon...
The Flood Warning continues for
the Big Creek near Cumming.
* Until this afternoon.
* At 8:45 AM EST Thursday the stage was 6.4 feet, and nearly steady.
* Flood stage is 6 feet.
* Minor flooding is occurring, and minor flooding is expected to
continue.
* Forecast...The creek is expected to fall below flood stage late
this morning and continue falling to 1.2 feet Friday morning.
* Impact...At 6 feet, minor flooding expands 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 and 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
$$680
WGUS82 KFFC 121933
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
233 PM EST Thu Nov 12 2020
...The Flood Warning continues for the following rivers in Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.
Caution is urged when walking near riverbanks.
Additional information is available at weather.gov/atlanta.
GAC117-121-130745-
/O.CON.KFFC.FL.W.0475.000000T0000Z-201114T0400Z/
/APHG1.1.ER.201112T0427Z.201113T0000Z.201113T2200Z.NO/
233 PM EST Thu Nov 12 2020
...The Flood Warning remains in effect...
The Flood Warning continues for
the Big Creek near Alpharetta.
* Until Friday evening.
* At 1:45 PM EST Thursday the stage was 7.9 feet.
* Flood stage is 7 feet.
* Minor flooding is occurring, and minor flooding is forecast to
continue.
* Forecast...The creek is expected to rise to a crest around 8.1
feet this evening. It will then fall below flood stage Friday
afternoon.
* Impact...At 8 feet, minor flooding continues further into the
woodlands and fields along the creek from near Cumming in south
Forsyth County to Alpharetta and Roswell in north Fulton County.
Additional portions of The Big Creek Greenway have minor flooding
with 1 to 2 feet of water and most of the walking and biking paths
will be closed, especially upstream and downstream from the gage
on Kimball Bridge Road and near Rock Mill Park. Portions of the
YMCA Campground off Preston Ridge Road will be flooded.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$213
WGUS82 KFFC 130245
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
945 PM EST Thu Nov 12 2020
...The Flood Warning continues for the following rivers in Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.
Caution is urged when walking near riverbanks.
Additional information is available at weather.gov/atlanta.
GAC117-121-131445-
/O.CON.KFFC.FL.W.0475.000000T0000Z-201114T0400Z/
/APHG1.1.ER.201112T0427Z.201113T0000Z.201113T2200Z.NO/
945 PM EST Thu Nov 12 2020
...The Flood Warning remains in effect...
The Flood Warning continues for
the Big Creek near Alpharetta.
* Until Friday evening.
* At 8:45 PM EST Thursday the stage was 7.9 feet.
* Flood stage is 7.0 feet.
* Minor flooding will continue.
* Forecast...The river is expected to remain around 7.9 feet
tonight. It will then fall below flood stage Friday afternoon.
* Impact...At 8.0 feet, Minor flooding continues to expand further
into the woodlands and fields along the creek from near Cumming in
south Forsyth County to Alpharetta and Roswell in north Fulton
County. Additional portions of The Big Creek Greenway have minor
flooding with 1 to 2 feet of water. Most of the walking and biking
paths will be closed...especially upstream and downstream from the
gage on Kimball Bridge Road and near Rock Mill Park. Portions of
the YMCA Campground off Preston Ridge Road will flood.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$659
WGUS82 KFFC 131121
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
621 AM EST Fri Nov 13 2020
...The Flood Warning continues for the following rivers in Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Motorists should not attempt to drive around barricades or drive
cars through flooded areas.
A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.
Caution is urged when walking near riverbanks.
Additional information is available at weather.gov/atlanta.
GAC117-121-132330-
/O.CON.KFFC.FL.W.0475.000000T0000Z-201114T0400Z/
/APHG1.1.ER.201112T0427Z.201113T0000Z.201113T2136Z.NO/
621 AM EST Fri Nov 13 2020
...The Flood Warning remains in effect...
The Flood Warning continues for
the Big Creek near Alpharetta.
* Until this evening.
* At 5:45 AM EST Friday the stage was 7.9 feet.
* Flood stage is 7 feet.
* Minor flooding is forecast.
* Forecast...The river is expected to fall below flood stage late
this afternoon and continue falling to 2.7 feet Tuesday evening.
* Impact...At 8.0 feet, Minor flooding continues to expand further
into the woodlands and fields along the creek from near Cumming in
south Forsyth County to Alpharetta and Roswell in north Fulton
County. Additional portions of The Big Creek Greenway have minor
flooding with 1 to 2 feet of water. Most of the walking and biking
paths will be closed...especially upstream and downstream from the
gage on Kimball Bridge Road and near Rock Mill Park. Portions of
the YMCA Campground off Preston Ridge Road will flood.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$273
WGUS82 KFFC 131757
FLSFFC
Flood Statement
National Weather Service Peachtree City GA
1257 PM EST Fri Nov 13 2020
...The Flood Warning is cancelled for the following rivers in
Georgia...
Big Creek near Alpharetta affecting Fulton and Forsyth Counties.
GAC117-121-131900-
/O.CAN.KFFC.FL.W.0475.000000T0000Z-201113T1757Z/
/APHG1.1.ER.700119T1352Z.700119T1353Z.700119T1355Z.NO/
1257 PM EST Fri Nov 13 2020
...The Flood Warning for the Big Creek near Alpharetta has been
cancelled...
The Flood Warning is cancelled for
the Big Creek near Alpharetta.
* At 12:45 PM EST Friday the stage was 6 feet.
* Flood stage is 7 feet.
* Forecast...The river will continue to fall below flood stage.
&&
LAT...LON 3410 8425 3410 8420 3404 8425 3402 8430
3404 8433 3407 8427
$$The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 10:35 PM EST | Flash Flood Warning | FFC | DeKalb, Fulton, Gwinnett | 6 hr |
| Nov 12, 12:05 AM EST | River Flood Warning | FFC | Forsyth, Fulton | 6 hr |
| Nov 12, 12:20 AM EST | Special Weather Statement | FFC | Towns, Union, White | 40 min |
| Nov 12, 1:37 AM EST | Flash Flood Warning | FFC | Towns, White | 5 hr |
| Nov 12, 3:49 AM EST | Special Weather Statement | FFC | Houston, Twiggs | 41 min |
| Nov 12, 4:13 AM EST | Flash Flood Warning | FFC | Greene, Oglethorpe, Putnam | 6 hr |
| Nov 12, 4:16 AM EST | Flash Flood Warning | FFC | Houston | 6 hr |
| Nov 12, 4:27 AM EST | River Flood Warning | FFC | Forsyth | 7 hr |
| Nov 12, 5:24 AM EST | Flash Flood Warning | FFC | Baldwin, Hancock | 6 hr |
| Nov 12, 6:01 AM EST | Flash Flood Warning | FFC | Taliaferro, Warren, Wilkes | 6 hr |
| Nov 12, 6:03 AM EST | Flash Flood Watch | FFC | Baldwin, Glascock, Hancock, Jefferson, Taliaferro, Warren and 3 more | 5 hr |
Nearby
River Flood Warnings in Georgia, 2020Every river flood warning in 2020
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.