A cold front dropping southeastward through the Ohio Valley and toward the Central Appalachians will be the focus for additional heavy precipitation tonight into the early hours of Tuesday across large portions of Kentucky into West Virginia.
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These areas have seen very heavy rainfall amounts over the past week, with additional rains bringing the potential for additional life-threatening flash flooding.
Additional showers and thunderstorms are again possible Tuesday afternoon into Tuesday night across these regions, although precip totals are not expected to be as heavy as during Monday afternoon to Monday night.
There is not expected to be any significant changes to the recent active monsoonal weather pattern across large portions of the Southwestern U.S.
Above average moisture values are forecast to continue to stream northward across the Southwest, California, the Great Basin and into the Northern Rockies, supporting the potential for widespread scattered showers and thunderstorms.
These monsoonal rains will continue to pose a flash flood threat, especially across burn scars, dry creek beds and slot canyon areas.
Some relief in sight for areas of the Northwestern U.S. that have seen numerous days of record high temperatures.
Monday appears that it will be the last day of potentially record high temperatures for area of the Northwestern U.S. as a cold front moving inland from the eastern Pacific brings in cooler temperatures for Tuesday and Wednesday.
The combination of the recent record highs and dry conditions over the Northwestern U.S. has increased the fire weather threat.
While cooler temperatures may be in store for Tuesday and Wednesday, the continued lack of significant rains will keep the fire weather threat going from portions of the Pacific Northwest, Northern Rockies and into the Northern High Plains.
The core of the heat over the next few days will be centered across the middle section of the nation.
High temperatures are expected to again be over 100 degrees on Tuesday across large portions of the Northern, Central and Southern Plains, with the greatest above average temperatures expected across Kansas, Nebraska, South Dakota, Iowa, Minnesota and southern North Dakota.
Slightly cooler temperatures expected across the Northern to Central Plains on Wednesday, but this will be short lived as more very hot temperatures expected toward the end of the work week across these areas.
Cooler than average temperatures are expected to persist across the Southwest and the Great Basin over the next two days where the active monsoonal precipitation pattern will support cloudy and wet conditions. ■
A clipper system will move quickly across the northern Plains into the Midwest Friday and the Northeast by Saturday, bringing a wintry mix of rain and snow showers ahead of a sweeping cold front.