Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 355 AM EDT Tue Aug 10 2021 Valid 12Z Tue Aug 10 2021 - 12Z Thu Aug 12 2021 ...Heavy rain and severe storms possible in the Midwest and Great Lakes; severe weather also possible into the Mid-Atlantic... ...Sultry conditions to persist across portions of the Southern Plains into the Midwest, excessively hot temperatures take shape across the Pacific Northwest... ...Poor air quality due to wildfire smoke continues in the western and central U.S., monsoon showers and storms to drench parts of the Southwest... The Midwest and Great Lakes remain in the spotlight for more episodes of severe weather over the next couple days. An area of low pressure will continue to keep these regions in a favorable position for sever storms that could produce damaging winds, large hail, and tornadoes. The Storm Prediction Center has a large Slight Risk area that extends from the Central Plains to the central Great Lakes. In the middle of the Slight Risk is an Enhanced Area centered over southern Wisconsin, northern Illinois, and northeast Iowa where the highest potential for damaging winds is anticipated. The same general locations are once again at risk for severe weather on Wednesday. Farther east, strong-to-severe storms are also on tap for parts of the eastern Great Lakes, the Ohio Valley, and northern Mid-Atlantic later today and Wednesday. In all of there aforementioned areas, heavy rainfall is possible in addition to the severe weather with areas of flash flooding are also possible. Much of the Lower 48 will be mired in abnormally hot conditions through mid-week. Heat Advisories have been issued from the central Plains and Mississippi Valley to the Lower Great Lakes and the Northeast In addition, Excessive Heat Watches and/or Warnings are in effect for parts of the Pacific Northwest and in the Delaware Valley. High temps are forecast to soar towards the century mark in the Willamette Valley on Wednesday. Daytime lows will be quite warm along the West Coast and east of the Mississippi River where numerous record warm minimum temperatures are possible on Wednesday and Thursday mornings. The heat wave in the Northwest looks to peak during the second half of the week. Elsewhere, the evolving upper level pattern will favor wildfire smoke from the western U.S. to advance downstream into the Central Plains and Midwest, resulting in reduced air quality through today. Smoke refuses to let up from northern California to the central Rockies and High Plains through mid-week. Also, monsoon showers and thunderstorms will be a daily occurrence in the Desert Southwest. A Marginal Risk for Excessive Rainfall has been posted for parts of the region both Tuesday and Wednesday. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php