Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 300 AM EST Tue Feb 14 2023 Valid 12Z Tue Feb 14 2023 - 12Z Thu Feb 16 2023 ...A rapidly developing low pressure system could bring blizzard conditions from the northern Plains to the upper Great Lakes Tuesday night into Wednesday as high winds and some thunderstorms spread across the southern Plains... ...Another low pressure system is expected to bring more heavy mountain snows into the Four Corners Tuesday night and Wednesday... ...The same low pressure system will likely bring strong to severe thunderstorms across the mid-South as moderate snow and gusty winds sweep across the central Plains... A rapidly developing low pressure system will take center stage over the mid-section of the country today. This system is expected to trigger strong, gusty winds possibly above 60mph over the southern High Plains as the system intensifies. Showers will develop ahead of the system moving through the central/southern Plains and eventually into the Mississippi Valley. Some thunderstorms will also be possible, especially for the southern Plains and lower Mississippi Valley. The showers will quickly spread into the Midwest, upper Mississippi Valley, then into the Ohio Valley and the Great Lakes Tuesday night as the low pressure system tracks northeastward into the upper Midwest and intensifies further. Snow is expected to expand across the northern Plains to the upper Midwest Tuesday night into Wednesday morning with strengthening north to northwest winds on the back side of the intensifying low. While snowfall totals are not expected to be very heavy, the increasing winds from the deepening surface low may produce blizzard conditions on the back side of the storm center from the eastern part of the northern Plains Tuesday night to as far north as the upper Great Lakes Wednesday afternoon. The storm will move away into eastern Canada by Thursday. High pressure system off the East Coast will pump much milder-than-normal air across the entire eastern U.S. with readings as much as 30 degrees above normal. In the wake of the first strong upper low ejecting northeastward across the Plains/Mississippi Valley, the next in the series of strong upper lows will dive southeast from the Pacific Northwest, through the Great Basin and into the Southwest on Tuesday and then eastward into the Southern Plains during Wednesday. This system will have the potential to produce heavy snows in the Washington and Oregon Cascades, across the Mogollon Rim region of Arizona, through much of the Rockies and into the Central High Plains over the next 2 days. Winter storm watches, warnings and advisories are currently in effect across all of these region. In addition to the heavy snow threat across the above mentioned regions, temperatures will be falling to 10 to 20 degrees below average from the High Plains, westward through the Rockies and into the Great Basin. By Wednesday night into Thursday morning, the low pressure system will be ejected into the southern Plains and head toward the Midwest. This storm track will bring a heightened threat of strong to severe thunderstorms across the mid-South as moderate snow and gusty winds sweep across the central Plains. Kong/Oravec Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php