Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 333 PM EDT Sun Sep 29 2019 Valid 00Z Mon Sep 30 2019 - 00Z Wed Oct 02 2019 ...The major winter storm across the Northern Rockies will continue through this evening, before beginning to wind down early Monday... ...Heavy to excessive rainfall possible across portions of the Central U.S. through Tuesday... ...Much below average temperatures across the Northwest, and much above average temperatures east of the Rockies will continue through mid-week... The ongoing major winter storm across the Northern Rockies is expected to continue through this evening, before beginning to wind down by early Monday. An additional 1 to 2 feet (locally higher) of snow is still possible, particularly for portions of western Montana. Widespread winter storm warnings and advisories remain in effect for much of the Northern Rockies and parts of the northern Intermountain West. Strong winds may bring blizzard conditions, with blowing snow continuing to disrupt travel into Monday even after the snowfall has come to an end. As this system ejects into the Plains on Monday, showers and thunderstorms will develop north of the low pressure system from the Northern Plains to the Upper Mississippi Valley tonight and into Monday. Locally heavy rainfall and severe thunderstorms are possible. To the South, tropical moisture (in part from Tropical Storm Narda in the East Pacific) will funnel into the Central U.S. with the best threat for heavy rainfall across eastern portions of New Mexico where WPC shows a moderate risk for excessive rain/flash flooding Monday into early Tuesday. On Tuesday, the focus shifts northward along a slow moving frontal boundary across the Central Plains into the Upper Midwest where heavy to excessive rainfall is likely to begin Tuesday afternoon, and continue into Wednesday beyond the short range period. A large temperature range is expected across the CONUS into early week as anomalous upper level troughing dominates in the West, and upper level ridging builds across the East. Underneath the trough, daytime highs could be 20 to 30+ degrees below average across much of the Northwest with several daily record low maximum temperature records possible into Tuesday, especially across the Northern Great Basin/Rockies and California. Meanwhile east of the Rockies, temperatures will be much above average. The core of the heat will be from the Southeast to the Ohio Valley where widespread daytime highs in the mid to upper 80s (north) and mid to upper 90s (south) could approach or exceed record values. For the East, this stretch of record warmth will continue through much of this week. Additionally, warm, dry, and gusty weather across Colorado will continue the critical fire weather conditions through Monday where red flag warnings are currently in effect. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php