Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 139 PM EST Tue Jan 22 2019 Valid 00Z Wed Jan 23 2019 - 00Z Fri Jan 25 2019 ...Winter storm to impact parts of the Central Plains into the Upper Midwest and Great Lakes through Wednesday... ...Active weather returns to the Pacific Northwest... ...Dangerous wind chills return to the Northern Plains and Midwest Thursday... A low pressure system will continue to strengthen as it exits the central Plains this Tuesday afternoon. Parts of the central High Plains have already been impacted by blizzard or near-blizzard conditions as the storm intensifies. This low is forecast to track east-northeast into the Great Lakes through Wednesday. A swath of snow is expected to the north of the storm track with up to a foot of accumulation possible over the Great Lakes. Some mixed precipitation can also be expected near the storm track, as well as parts of the interior Northeast on Wednesday. South of the storm track, rain is expected ahead of a cold front and some thunderstorms will be possible. Widespread rain totals of around an inch or more are forecast. Meanwhile, moisture associated with a rather energetic Pacific cyclone is impacting the Pacific Northwest. Rain could become heavy later today over the coastal sections as well as across the Olympic Peninsula. The moisture will then continue to penetrate further inland, reaching the Intermountain region on Wednesday in the form of snow. The snow will move into the northern Rockies Wednesday night and early Thursday just as the next surge of arctic air from central Canada arrives. This next round of much below average temperatures will enter the northern Plains and upper Midwest on Thursday, before pushing further south and east into the Ohio Valley Thursday night. High temperatures on Thursday will struggle to reach above zero from North Dakota to Wisconsin, with widespread wind chill values between minus 10 and minus 20. Existing snow cover and strong winds with the Arctic cold front may combine to produce ground blizzard conditions in parts of the northern Plains from later Wednesday into Thursday morning. Lamers/Snell Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php