The flood threat continues to circulate in the south this week

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Truckers will face more torrential rains in the southeast this week, after periods of flash flooding over the weekend.

Heavy rains have hit parts of several states, with the remnants of Hurricane Nicholas partly to blame. There is also an upcoming cold front that will help trigger additional rounds of downpours Monday through Wednesday, followed by drier weather later in the week.

The National Weather Service has implemented flash flood monitors in northern parts of Mississippi, Alabama, and Georgia, as well as western and central Tennessee. The watches will expire later on Monday evening, but the NWS may reissue them on Tuesday. As of Monday morning, the watches include the metropolitan areas of Memphis, Nashville, and Chattanooga, Tennessee, in addition to Tupelo, Mississippi; Huntsville and Birmingham, Alabama; and parts of the Atlanta area. These spots could see up to an additional 3 inches of rain, with pockets of higher accumulations.

The NWS could end up posting watches for other areas, and drivers could experience occasional ramp and road closures.

Flash flood watches are also in place from northeast Florida to South Carolina.

Main areas of concern

• Interstate 20 from Tuscaloosa, Alabama, to Atlanta.
• Interstate 55 from Memphis to Grenada, Mississippi.
• Interstate 65 from Birmingham, Alabama to Nashville.
• Interstate 40 from Memphis to Crossville, Tennessee.
• Interstate 24 from Clarksville, Tennessee, to Chattanooga.
• Interstate 75 from Knoxville, Tennessee, to Atlanta.
• Interstate 95 from Jacksonville, Florida to Charleston, South Carolina.

Heavy rains will also hit the Midwest and Northeast on Tuesday and Wednesday, but flooding is less likely in those areas compared to the south, where the ground is already saturated. However, isolated areas of localized flash floods could develop in places ranging from Chicago and Detroit to New York, Philadelphia and Boston.

(Map: Critical Events and FreightWaves SONAR Radar, September 20, 2021, 8:00 a.m. ET. For more information on FreightWaves SONAR, Click here.)

Other notable weather this week

Truckers may tremble when driving through parts of the West. Temperatures in some high elevations in Wyoming, Colorado and Utah will drop into the 20s from Monday night through early Tuesday. The NWS has frost watches and warnings for the Wasatch Range around Salt Lake City, as well as the Rockies in northwest Colorado and the Sierra Madre in southern Wyoming.

On the other end of the spectrum, triple-digit temperatures will cook the Big Country and Concho Valley of central Texas. Highs will reach nearly 105 degrees in places such as Sweetwater, Sterling City, Sherwood, Carlsbad, San Angelo, Throckmorton and Abilene. Heat advisories have been issued for these areas.

A red flag warning covers part of the Dixie Fire Zone in northern California. Along with a persistent drought and extremely low relative humidity, winds will increase on Monday and Tuesday. Gusts of 35 mph could spread the blaze, after teams made major progress in setting up containment lines over the past week. The gusts could be higher on some ridges and in some canyons. Smoke from the fire will blow south toward the Sacramento and San Joaquin valleys.

Click here for more FreightWaves articles by Nick Austin.

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