The risk of localized flash flooding continues through the end of the week over part of the interior West.
Cities at risk for flash flooding during the random storms include Las Vegas, Phoenix, Tucson, Flagstaff, Albuquerque, Salt Lake City, Cedar City in Utah and Riverside, Calif.
According to Western Weather Expert Ken Clark, "An upper-level disturbance drifting in from the Pacific will focus an already in place flow of tropical moisture, known locally as the monsoon."
The end result will be more numerous and locally, extra-drenching showers and thunderstorms from interior California to New Mexico, northward to Utah and Colorado.
The storms will tend to favor, but not be limited to the high ground.
Isolated downpours can quickly flow downhill, causing canyons and arroyos to quickly fill with water.
The spotty downpours can also lead to debris flows in recent burn areas.
While area residents will welcome any non-destructive rainfall, a number of the storms will bring little or no rainfall, frequent lightning strikes and the risk for new wildfires.
"By the end of the week the storms will consolidate farther to the east and south over the Four Corners states as drier air invades from the north and west and the disturbance pushes inland," Clark added.
At such time the risk for flash flooding in Las Vegas and Phoenix will have ended.
Meanwhile, a stalled front will continue to bring rounds of drenching thunderstorms and the risk of flash and urban flooding to parts of the southeastern U.S. this week.
The rain is here to stay in Seattle, as showers and cloudy skies takeover the week's weather.
Two storms will bring high winds to the United Kingdom and Ireland this weekend.
A storm will drop heavy snow and disrupt travel from parts of the Midwest to a large part of the Northeast by Sunday.
Wintery weather will not let up anytime soon in Chicago, as the city will experience cold, snow and ice this week.
The coldest air of the season so far has descended on northeastern Pennsylvania and the I-80/I-81 corridors. A storm will move in Saturday and tap into some of that cold air.
Set two records; greatest 24 hour storm; 17.0"; greatest single storm total 39.6" for city (13th-14th).
Kansas City, MO (1992)
2.68" of rain.
Flagstaff, AZ (1967)
27.3" snow, greatest 24 hour snowfall total.