WTLA - WATERTODAY LOUISIANA

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November 21, 2024

WT INTERNATIONAL

7/10/2024

WT Staff

Streamflow Situation
From the network of USGS real-time streamflow monitors in Louisiana
Beryl filling west and central LA waterways
July 10, 2024 120 pm CDT

Current Streamflows from the network of USGS monitoring stations in Louisiana

Sabine River remains above flood stage near Ruliff, TX maintaining a level volume and depth since the update yesterday. Extreme high flow above 99th percentile is recorded on Bayou San Patricio near Benson again Wednesday where streamflows have been running above the 95th percentile since Beryl made landfall next door. The effects of Beryl are felt all the way into Canada with heavy rain effects occurring now north and south of the Great Lakes.

Streamflows through central Louisiana run above normal to much above normal, tapering off to the east where below normal and low flows are recorded. The lowest flow midweek is Region 7 Tangipahoa River 1st percentile level near Robert.

Active flooding: provisional data from USGS streamflow gauges
1 station recording above flood stage including:
Region 4:

Sabine River is flooding near Ruliff, TX

See the black tag on the map for flood values updated daily.

Flows above 99th percentile at risk of flooding:
1 USGS streamflow gauge above 99th percentile high flow or action stage including

Region 1 Bayou San Patricio flowing high near Benson

See blue tag on the map for high flow details, updated daily
Drought and Low Flow
1 USGS streamflow gauge rated 1st percentile extreme low

Region 7 - Tangipahoa River is flowing low near Robert

See the red-brown tag on the map for extreme low flow
Drought Map from the USGS WaterWatch seven-day average streamflow compared with historic streamflow

Extreme Drought rated area includes

Region 7 - Tangipahoa Parish

Below normal rated area includes:

Region 7 west of Tangipahoa River including east side St Helena and Livingston Parishes, West Feliciana Parish, west side of Pointe Coupee, West Baton Rouge, central Iberville Parish

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.

As sourced from USGS Waterwatch Current Streamflow

FLOOD SAFETY

What is the difference between a Flood Watch and a Flood Warning issued by the National Weather Service?

Flash Flood Warning: Take Action! A Flash Flood Warning is issued when a flash flood is imminent or occurring. If you are in a flood prone area move immediately to high ground. A flash flood is a sudden violent flood that can take from minutes to hours to develop. It is even possible to experience a flash flood in areas not immediately receiving rain.
Flood Warning: Take Action!
A Flood Warning is issued when the hazardous weather event is imminent or already happening. A Flood Warning is issued when flooding is imminent or occurring.
Flood Advisory: Be Aware:
A Flood Advisory is issued when a specific weather event that is forecast to occur may become a nuisance.

A Flood Advisory is issued when flooding is not expected to be bad enough to issue a warning. However, it may cause significant inconvenience, and if caution is not exercised, it could lead to situations that may threaten life and/or property.
Flood Watch: Be Prepared:
A Flood Watch is issued when conditions are favorable for a specific hazardous weather event to occur.

A Flood Watch is issued when conditions are favorable for flooding. It does not mean flooding will occur, but it is possible.

Be prepared, stay safe through flood events

March 13, 2023

Did you know,

6 inches of moving water can knock an adult down

And 12 inches of flowing water can carry a car away!

(From ready.gov)

Stay safe during flood events, watch for flood alerts in your area, here in BLACK.

Avoid driving into flooded areas, and take caution trying to drive out of a flood zone.

Avoid using bridges over high flowing rivers.

If possible, move to higher ground, get uphill, or move to a higher floor in your building or home,

leaving yourself an exit to the roof if necessary. Do not become trapped in an attic!

Keep dry food, bottled water, flashlight and extra batteries, cell phone charger packed in go bags for all of your household and pets.

Have flotation devices accessible for every member of your household in case you need to evacuate on foot.

If you must drive to get out of a flood zone,

have a high-quality window breaking/seatbelt cutting device in your vehicle, secured to your rearview mirror for fast retrieval.

You may not be able to reach your car’s glove box in an emergency situation.

The contents of seat and door storage compartments and center console may become displaced in an emergency,

causing you to lose track of items that are not secured.

Even if your vehicle has rolled or tipped over, as long as you are still belted in, you should be able to reach the rear-view mirror to retrieve your emergency tool.

Keep your seatbelt on until the vehicle has made impact with the water body. It will often float on the surface for a short time.

There is time to get out through an open side window. Act calmly, deliberately and quickly, without hesitation.

Use your tool to cut your seatbelt if the buckle will not release in the normal way.

Use your window breaking device toward a corner of your side window to break the safety glass.

Attempting to break the window at the center may not work.

Windshields and rear windows are reinforced and will not break as easily as the side windows.

If your vehicle is in any danger of becoming submerged, you need to get out before it goes underwater.

Submerged vehicles may roll over or invert underwater, disorienting you and others inside.

Get familiar with your local streams and rivers, know your normal flow levels and check the USGS Waterwatch Current Streamflow for the real time flow volume and depth.

Find the monitoring sites upstream and downstream nearest your home and sign up for high flow alerts.

https://waterwatch.usgs.gov/

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