Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 357 PM EDT Mon Mar 28 2022 Valid 00Z Tue Mar 29 2022 - 00Z Thu Mar 31 2022 ...Record cold for portions of the upper Ohio Valley, Mid-Atlantic and Northeast Tuesday morning... ...Severe thunderstorms and flash flooding possible from the central to southern Plains into the middle and lower Mississippi Valleys Tuesday night into Wednesday... ...Critical Risk of fire weather for the southern to central High Plains... As an upper level low departs from the Northeast tonight, scattered snow showers will dissipate as high pressure settles in from the west. Well below average temperatures across the upper Ohio Valley and Northeast will continue into Tuesday morning where record cold minimum temperatures are expected Tuesday morning, extending from the upper Ohio Valley into the East Coast between eastern Virginia and southern New England. Temperatures will moderate into the middle of the week but remain below average over the Northeast through Wednesday, to the north of an advancing warm front. A large closed upper level low just off of the coast of California will drive much of the impactful weather over the lower 48 heading into the middle of the week. Locally heavy rain along the central to southern coast of California will come to an end tonight as the upper level system and associated cold front move into the Desert Southwest. Scattered showers and higher elevation heavy snow will spread across the Intermountain West through Tuesday while high temperatures out ahead of the upper level system remain above average into the 70s and 80s across the Great Plains. Warm temperatures and low moisture values will favor the threat for the spreading of wildfires. SPC has portions of the southern and central Great Plains in a threat for Elevated to Critical fire-weather conditions for the rest of today into Tuesday, mainly behind a dryline forecast over western Texas, Oklahoma and Kansas. As the upper level system tracks east late Tuesday into Wednesday, favorable upper level dynamics will meet with increasing amounts of low level moisture from the Gulf of Mexico to support the development of what is likely to be a south to north axis of thunderstorms stretching from portions of central Texas into Oklahoma and southern Kansas. The line of strong to severe thunderstorms will track east late Tuesday night into Wednesday, bringing the potential for tornadoes, large hail, damaging straight-line winds and flash flooding. Temperatures will drop significantly in the wake of the cold front as it tracks eastward into the Mississippi Valley on Wednesday. On the north side of the storm system, winter weather is expected with light snow accumulations across the north-central U.S. along with a mixture of snow, sleet and freezing rain across the Great Lakes region into parts of the Allegheny Plateau and Northeast. Otto Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php