Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 1239 PM EST Tue Nov 26 2019 Valid 00Z Wed Nov 27 2019 - 00Z Fri Nov 29 2019 ...High impact storms to affect the Central Plains into the Upper Mississippi Valley/Upper lakes and large parts of the western U.S., disrupting Thanksgiving travel... A very active weather pattern will dominate the Thanksgiving week travel period, leading to potential travel impacts across large portions of the Central and Western U.S. The lead storm developing across the Southern to Central Plains Tuesday will deepen as it pushes northeast into the Upper Mississippi Valley/Upper Great Lakes Wednesday and across northern New England by early Thursday. A broad region of heavy snow potential with this storm will stretch from the Central Plains into the Upper Mississippi Valley Tuesday, across the Upper Great Lakes on Wednesday and into northern Maine by Thursday. Snow totals across much of these regions expected to be in the 8-12"+ range. In addition to the heavy snow potential with the lead storm, rain and thunderstorms are likely Tuesday evening/night along the trailing cold front sweeping eastward across the Mid to Lower Mississippi Valley, Ohio Valley and Tennessee Valley. Some of these storms may produce severe weather across the Middle to Lower Mississippi Valley, with a slight to enhanced risk of severe weather denoted in the latest Storm Prediction Center's Convective Outlook for the day 1 period. In the wake of the storm moving off the New England coast early Thanksgiving Day...strong winds will develop across much of the Northeast, threatening portions of the Thanksgiving Day parade in New York City. Wind gusts to 40+ mph are possible across New York City on Thursday. At the same time the storm develops across the Central U.S. on Tuesday, another storm will be pushing southeast toward the Oregon/northern California coast. This storm is already beginning to strengthen rapidly and will continue to do so before making landfall Tuesday night. This storm will likely bring damaging winds, heavy mountain snows, coastal flooding Tuesday-Wednesday across Oregon into California. Winds are likely to gust to over hurricane force along the southwest coast of Oregon into coastal northwest California Tuesday evening into Tuesday night. These winds will weaken by early Wednesday as the storm moves inland and weakens. While weakening of the storm is likely by early Wednesday, the heavy snow impacts will continue through the Sierra into Thursday. Snow totals by late Thursday will likely be in the 2 to 4 foot range through the Sierra. This storm will also bring the potential for heavy rains at lower elevations of California, with a flash flood threat across coastal southern California from San Diego to Los Angeles, especially across recent burn scare regions. As the western storm system pushes slowly inland Wednesday and Thursday, it will begin to draw abundant moisture northeastward out of the eastern Pacific sub-tropics . This will spread rain and snow potential into portions of the Southwest/Southern High Plains Wednesday night, and into the Southern to Central Plains on Thanksgiving. This precipitation will likely lead to additional holiday travel issues across these regions. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php