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2/8/2024
WT Staff
HAPPENING NOW
Alabaha River flooding pause near Blackshear
Flooding continues near Offerman
Thursday, February 8 2024 - last updated 947 am EST
Streamflow situation based on provisional data from USGS streamflow gauges in the rivers and creeks of Georgia
Savannah River appears to have jumped out of its channel near Cylo around 1:30 am this morning, according to the USGS streamflow sensors installed there. As of this update, the depth of the river shows not quite two inches over flood stage, at a volume of 14,500 cubic feet per second. This volume of overflow quickly adds up to a large spill that will pile up in the low spots around Cylo. The provisional readings are being confirmed with USGS, more to follow.
Little Satilla River continues overflowing near Offerman, the volume coming down the channel appeared to be on the decline really leveled out overnight to a constant flow near a foot over flood stage. At 1910 cubic feet per second, this water will be finding the low spots to accumulate in until the river calms down and lets the overflow run back into the channel.
Alabaha River subsided below flood stage at GA-203 near Blackshear. The end of flooding at this locatioin occurred as Savannah River overflowed Cylo, right around 130 am this morning. The Alabaha River flow level is still in action stage near Blackshear at 8.88 ft deep however the trend is declining. If no further pressure from upstream, this flooding may be over for now.
Check black tags on the map for updated flow levels throughout the day.
Mississippi-bound streamflows got deeper into the decline overnight. Current streamflow picture for GA is much below normal in the northwest with an expansion of the drought rated area there. Mississippi basin south of Atlanta is mostly normal with a handful of stations rated below normal Thursday.
For the Atlantic basin, flows from northeast to the coast are mostly normal with a few below normal ratings spread through the entire basin. Savannah River is showing above flood stage near Cylo yet the flow volume is rated normal. We will confirm the reading with USGS to be sure there is no glitch in the mechanism. More to follow.
As of this update, one station in the Ocmulgee River watershed is recording an extreme low value.
Turn around, don`t drown when encountering flooded roads. Most flood deaths occur in vehicles.
http://www.weather.gov/safety/flood
Drought Map USGS 7-day average streamflow compared with historic average
A big shift in the Georgia drought map occurred Wednesday after a couple of weeks with no area rated below normal, the drought map is beginning to grab up more territory in the Mississippi Basin.
Coosa River watershed popped back on the drought map yesterday, rated below normal from Whitfield, Murray, Gilmer, east Gordon and west Pickens. By Thursday, the below normal area extends to east Chatooga, north Floyd and north Bartow Counties. The drought map has also gripped the Tennesee River watershed area of northwest Georgia Thursday, including Dade, Walker and Catoosa Counties.
Mid Chattahoochee River watershed remains on the drought map Thursday from south Paulding, south Cobb, south Fulton, Douglas, East Carroll, Heard, west Coweta, Troup, Harris and northwest Muscogee Counties all rated below normal.
Completing the drought ratings on the Mississippi side of the divide, the southwest corner of Thomas County in the Ochlockonee watershed remains below normal another day. No part of the Atlantic drainage basin is hit up on the drought map Thursday.
Drinking Water Advisories
Fulton County Water has had Alpharetta under a BWA after E. coli was detected on Sunday. The boil advisory applies until the lab confirms samples are clear of all microbiological contamination.
USGS Provisional Data Statement
Data are provisional and subject to revision until they have been thoroughly reviewed and received final approval. Current condition data relayed by satellite or other telemetry are automatically screened to not display improbable values until they can be verified.
Provisional data may be inaccurate due to instrument malfunctions or physical changes at the measurement site. Subsequent review based on field inspections and measurements may result in significant revisions to the data.
Data users are cautioned to consider carefully the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Information concerning the accuracy and appropriate uses of these data or concerning other hydrologic data may be obtained from the USGS.
USGS seven-day average streamflows at each monitoring location are rated against the historic average flow volume for this day. Results appear on the drought map, showing surface area with a rating: below normal, moderate drought, severe drought or extreme drought. The drought-rated surface area most often follows watershed lines, the physical topography of drainage and direction of flow of the surface water across the state. The watershed layer on the map shows surface area impacted by streamflows in each drainage area. Turn the directional arrows on to see which way the water flows, along with hazardous spills reported in the area that could have an impact on water quality.
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