Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 429 AM EDT Sat Oct 17 2020 Valid 12Z Sat Oct 17 2020 - 12Z Mon Oct 19 2020 ...Temperatures will be 10 to 20 degrees above average and a continued fire weather threat for the Southwest into California... ...Accumulating snows possible from portions of the Northern Plains into the Upper Mississippi Valley from Friday night through Saturday... ...Temperatures will be 10 to 25 degrees below average across the Northern Plains into the Central Plains and east into the Upper Mississippi Valley by Sunday... Upper-level pattern across California and the Southwest will contribute to temperatures being 10 to 20 degrees above average and a continued fire weather threat for the Southwest into California. Fire weather threats will remain significant into this weekend across portions of California with no precipitation expected, gusty winds and low relative humidities persisting. In addition, dangerous air quality will also continue near current wildfires with Air Quality Alerts posted across much Central California. In addition, fire weather concerns will extend eastward into parts of the Middle Mississippi Valley as Red Flag Warning are posted across the region. Meanwhile, low pressure over Upper Midwest will move northeastward to near James Bay in Canada by Sunday evening. The system will produce rain and snow from the Northern Rockies/Northern High Plains eastward to the Great Lakes on Saturday. This storm will produce an area of accumulating snows from northern portions of North Dakota into northern Minnesota. Temperatures will remain much below average across this area both Saturday and Sunday. As the low pushes into the Upper Great Lakes on Sunday, the trailing cold front will push quickly south into the Central Plains/Middle Mississippi Valley region. This will bring much colder temperatures on Sunday across these area with high temperatures 10 to 25 degrees below average Sunday into Monday. Additionally, wet weather will continue along portions of New England on Saturday. An area of low pressure is forecast to develop along the slow moving frontal boundary lying along the Northeast coast, supporting moderate rain across much of New England. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php