...Active Weather Pattern to Continue Across the United States...
The jet stream is still unseasonably far south, the displacement of which is leading to unusually strong outbreaks of thunderstorms over the nation's midsection, as well as wringing the warm, moist air of early summer with extra vigor.
Much of the Great Plains and Midwest will see rounds of these potent, soaking storms over the next couple days as a low pressure system drifts eastward. The cyclone is expected to turn the winds
to the south and southeast all the way to the East Coast, with heavy
showers gradually overspreading that region as well.
The West will not be above the fray, with two separate disturbances
leading to inclement weather there as well. An area of low pressure in the upper atmosphere is forecast crawl across the California coast from the Pacific, triggering isolated showers and high-based thunderstorms. The menace of such dry thunderstorms is the lightning they produce, which can spark wildfires that do not get doused by the normally attendant rain.
Farther north, a sharp cold front is expected to settle into the Pacific
Northwest. This front will increase the winds over that region--another
factor in wildfire production and propagation. The approach and passage of the front will also lower temperatures from the current soaring levels, even over the northern Central Valley of California where the front is not expected to actually pass.
Despite the heft of the cold front, not much in the way of precipitation is anticipated south of the Canadian border.