Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Mon Apr 27 2020 Valid 12Z Mon Apr 27 2020 - 12Z Wed Apr 29 2020 ...Heavy snow lingers over parts of the mountains of New York and New England, a cool valley and coastal rain across the rest of the Northeast and Mid-Atlantic... ...Record heat possible in parts of the Southwest... ...There will be a slight to enhanced risk of severe thunderstorms with storm moving across Plains/Mississippi Valley on Tuesday into Wednesday... A storm will continue move away from the Northeast through Monday night into Tuesday. The system will cause damp, dreary, and gusty conditions across much of the Northeast and parts of the Mid-Atlantic through Monday evening. The storm will be in no rush to leave as it meanders off the Northeast coast on Monday and keeping spotty showers around for one more day across the region. Cold high pressure to the north is also working to spill cooler temperatures into New England and into the Mid-Atlantic. Daily record cool max temps could be set in parts of the Northeast on Monday. Snow is forecast over parts of the mountains of the northern New England where Winter Weather Advisories are in effect through Monday night for wet snow. Some isolated locations could pick up as much as six inches or more of snow while the majority will see on to four inches through early Tuesday. Meanwhile, sizzling temperatures continue in the Desert Southwest as upper-level ridging lingers over the region through Wednesday. Forecast highs in the Desert Southwest eastward to West Texas will be in the 80s and 90s while some spots surpass the century mark and/or challenge daily record high temperatures. Excessive Heat Warnings remain in effect for the Phoenix metro area and portions of the far Lower Colorado River Valley through Monday. Northern and central New Mexico remain at risk for elevated wildfires conditions through Monday. While parts of the Plains will get a short reprieve on Tuesday, the dome of high pressure in the Southwest should amplify over California and the Great Basin, resulting in abnormally hot temperatures sticking around in these areas through Wednesday. A new storm will move onshore over the Pacific Northwest and enter the Northern Plains on Monday evening. The storm is forecast to intensify on Tuesday because of a strengthening upper-level trough diving south through the Midwest by Wednesday morning. The storm's cold front will sweep across the Central/Southern Plains Tuesday and into the Mississippi Valley Tuesday night where there will be the potential for severe weather. The Storm Prediction Center issued a Slight to Enhanced Risk for severe weather for portions of the Southern Plains and Lower Mississippi Valley Tuesday. The threat for showers and thunderstorms are forecast to move into the Great Lakes/Ohio Valley into the Tennessee and Lower Mississippi Valleys by Wednesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php