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 risk of drenching and locally gusty thunderstorms has expanded to parts of Southern California, Arizona and Nevada.
The Northwest is dealing with yet another record-challenging heat wave to close out July. While relief will come next week, this heat wave will not be the last of the summer.
A cold front will press southward bringing relief from the heat to Spain, Italy and southeast Europe late this week.
Following the steam bath of this week, the weather around Washington, D.C., and Baltimore will not be in a hurry to cool down.
Flooding monsoon rain will continue this week in India and southeast Pakistan, but a drier pattern is expected to set in during August.
In the most destructive hurricane season in recorded history, images from Katrina, Rita, Wilma and others still resonate today and immediately bring to mind the total despair millions of Americans faced in 2005.
Thunderstorms with heavy rain flood and washed out many roads across the northeastern part of the state.
Columbia, SC (1991)
July 1991 became the wettest month ever with 17.46" of rain. The old record was 16.72" set in August 1949.
Gulf Coast (1995)
Tropical storm Dean entered the Texas coast near Galveston, TX. Galveston reported a wind gust of 51 mph, but just 0.54" of rain. Coastal roads were flooded across Louisiana.