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1/23/2024
WT Staff
HAPPENING NOW
NWS: Flood Watch in effect
Flooding due to excessive rainfall possible
Water news for Tuesday, January 23, 2024 - last updated 132 pm CST
National Weather Service Hazardous Weather Outlook issued 240 am CST Jan 23
FLOOD WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH LATE WEDNESDAY NIGHT...Flooding caused by excessive rainfall is possible in portions of southeast Louisiana, including the following Parishes, East Baton Rouge, East Feliciana, Iberville, Northern Livingston, Northern Tangipahoa, Pointe Coupee, St. Helena, West Baton Rouge and West Feliciana and southern Mississippi, including the following counties, Amite, Pike, Walthall and Wilkinson.
Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.
PRECAUTIONARY/PREPAREDNESS ACTIONS...You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
For additional details see http://www.weather.gov/safety/flood
Streamflow Situation from USGS real time streamflow monitoring stations around the eight watersheds of the state
Below normal flows statewide over the weekend have led to the seven day average falling severely below seasonal normal.
Five monitoring stations are recording extreme low levels Tuesday, updates in progress, more to follow.
Drought Map from USGS 7-day average streamflows compared to historic averages
Extreme drought ratings remain on Region 3 Tensas River channel and Region 7 Tangipahoa River channel Tuesday with a National Weather Service flood watch issued this morning for possible flooding due to excessive rainfall and runoff in Region 7 anticipated through the day Wednesday.
Severe drought in west LA Tuesday, the severe rating applied to all of Region 4 and most of Region 5. Acadia and Evangeline Parishes are rated moderate drought.
Moderate drought has taken over a larger area of Region 3 today, including Morehouse, Richland and Frankin Parishes. Grant and LaSalle Parishes in Region 2 are still rated moderate drought Tuesday, along with Region 1 Caddo, DeSoto and central Natchitoches, Bossier Parish in Region 1.
Region 7 is rated below normal in area not otherwise designated extreme drought. Central Washington Parish in Region 7, and all of Watershed regions 6 and 8 are unrated on the drought map.
Red-brown tags on the map refer to extreme low flows.
Note WaterToday reports day-to-day changes recorded by USGS streamflow monitors on rivers and tributaries located in Louisiana, along with monitors upstream in the Mississippi River basin: Ohio, Georgia and southwest New York state. USGS creates a drought map from 7-day average streamflow readings, by comparing the average with the historic weekly normal flow value for each location. The drought ratings are below normal, moderate hydrologic drought, severe drought and extreme drought.
HABs Report from National Centers for Coastal Ocean Science (NCCOS) satellite monitoring program
The latest image from NCCOS was captured Jan 22 at wind speed 8 mph. This view is mostly cloud obscured with no visible HAB activity showing on Lake Pontchartrain, Irish Bayou, Lake Maurepas, Lake Verret, Lake Palourde, Catouache or Lake Salvador. Lake Lery and Black Bay inland water bodies are cloud obscured in the Jan 22 image, however the HABs are visible Jan 21 at 300 to 400 thousand cells per 100 ml.
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.
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