Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 345 AM EDT Sun Apr 11 2021 Valid 12Z Sun Apr 11 2021 - 12Z Tue Apr 13 2021 ...Wet and stormy from the Great Lakes to the East Coast today; scattered showers to stick around the Great Lakes and Northeast on Monday... ...Dome of Canadian high pressure to direct below normal temperatures from the Northwest and northern Rockies today into the Nation's Heartland to open the week... ...Elevated fire weather risk remains in place for parts of the Southwest; Wind Advisories in the northern High Plains today... An occluded low pressure system entering the Great Lakes will continue to spawn areas of showers and thunderstorms from the Upper Mississippi Valley to the East Coast today. The best chances for potentially severe thunderstorms reside within the storm system's warm sector over the Mid-Atlantic and ahead of its associated cold front in Florida. In fact, a Slight Risk for severe weather is in place for much of the Florida Peninsula. Abnormally cool temperatures reside beneath a cold and potent upper low also tracking into the Great Lakes later today. High temps ranging between the low-mid 50s are expected from the Wisconsin on south and east into the Ohio Valley. The storm system will gradually weaken Sunday night and into Monday but is in no rush to leave the northeastern quarter of the Lower 48. This keeps spotty showers and mostly cloudy conditions in place throughout the Great Lakes and Northeast into the start of the week. The good news is the cold front races into the northwest Atlantic on Monday and a weak area of high pressure moves in across the Southeast, making for a drier and quieter start to the work-week. Farther west, an area of low pressure ushers in a seasonally cool temperature regime to the Northwest and northern Rockies. Some spots in the Pacific Northwest may even see record cold low temps this morning. In wake of the storm's cold frontal passage, a dome of Canadian high pressure spilling down from western provinces will support the push of abnormally colder temperatures southward the first half of the upcoming week. Places like the southern High Plains go from a more summer-like regime on Sunday to feeling more like March come Monday. Cooler temperatures are forecast to overtake the Mississippi Valley by Tuesday. Along with the colder temperatures, areas of mountain snow across the northern and central Rockies are likely to transpire both today and Monday. A meandering upper low over the North-Central U.S. could lead to several inches of accumulating snowfall in parts of North Dakota and northern Minnesota late Sunday and into Monday. Regarding other weather hazards around the country, fire weather conditions remain at elevated levels in parts of the Southwest and the central High Plains today. Fire weather conditions improve in the central High Plain on Monday, but persist in parts of New Mexico and Arizona. Plus, abnormally chilly conditions have led to some Frost Advisories being issued for parts of the central Plains and along the coast of northern California and southwest Oregon. Lastly, there are a handful of High Wind Warnings in place for western South Dakota and Wyoming this morning. Wind Advisories have also been posted for parts of the western Dakotas and eastern Montana through this evening as wind gusts could reach as high as 55 mph at times. Mullinax Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php