Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 221 PM EDT Mon Oct 11 2021 Valid 00Z Tue Oct 12 2021 - 00Z Thu Oct 14 2021 ...A very active weather pattern on tap across large portions of the Western and Central U.S.... ...Early Season Heavy Snows likely across the Northern to Central Rockies into portions of the Northern High Plains and eastern Great Basin... ...Widespread Heavy Rains, localized Flash Flooding and Severe weather possible across much of the Plains... ...Big temperature contrast across the country as a battle of the seasons commences... The next several days will see a very active weather pattern across large portions of the Western and Central U.S., producing potentially high impact to life threatening weather events. A deepening mid to upper level low across the Great Basin and Southwest will support an expanding area of heavy snows Monday, Tuesday into early Wednesday across the Northern to Central Rockies, eastern portions of the Great Basin and into the Northern High Plains. Winter Storm Watches and Warnings are currently in effect across much of these areas where snow fall totals of 1 to 2 feet are possible. This same system will also support increasing thunderstorm activity Tuesday night into Wednesday across large portions of the Plains ahead of a strong cold front pushing eastward across these areas. Heavy rains, isolated flash flooding and the risk of severe weather will accompany these storms, with the greatest risk of severe weather and flash flooding across portions of the Central to Southern Plains. Additional heavy rains and the risk of Flash Flooding will push back into portions of the Southern Plains Wednesday night into Thursday as moisture associated with currently Hurricane Pamela off the west coast of Mexico is transported northeastward into the above mentioned frontal zone which is forecast to become stationary over the Southern Plains at this time. While Pamela will likely weaken rapidly when it moves inland into western Mexico Wednesday, its associated moisture will have a longer lived impact as it is transported northeast into the frontal zone across the Southern Plains Wednesday night into Thursday, supporting the heavy rain and flash flooding potential. This active pattern, producing weather from both winter and summer, will also result in large temperature contrast across the nation over the next few days. Much below average temperatures are likely from the Northern High Plains, westward through the Rockies and Great Basin, while much above average temperatures will persist across nearly all of the Central to Eastern U.S. Oravec Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php