Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 325 AM EDT Tue Mar 12 2019 Valid 12Z Tue Mar 12 2019 - 12Z Thu Mar 14 2019 ...A very active weather pattern in store from the Southwest into the Plains.... ...Heavy snows and blizzard conditions possible from the Central to Southern Rockies into portions of the Central to Northern Plains... ..Heavy Rains...isolated flooding and severe weather possible as thunderstorms push east from the Southern Plains into the Lower Mississippi Valley... ...Large temperature anomalies likely on either side of the deepening low across the mid section of the nation over the next few days... The strong mid to upper level closed low moving from northwest Mexico/Southwest U.S. Tuesday...into the Southern to Central Plains Wednesday & Thursday will be the driver for a very active weather pattern over large portions of the nation over the next few days. Much above average levels of moisture will continue to feed northeastward ahead of this strong closed low...supporting increasingly widespread heavy precipitation affecting the Southwest...into the Southern & Central Plains....Lower to Mid Mississippi Valley and into the Great Lakes. The heaviest precipitation totals Tuesday into Wednesday expected in the higher elevation of AZ...southwest Colorado and stretching from northwest Texas...across Oklahoma...southeast Kansas into western Missouri. A line of thunderstorms associated with the above mentioned precipitation is expected to push from southeast New Mexico/Southwest Texas Tuesday evening...through much of west and central Texas Tuesday night/early Wednesday morning and then across eastern sections of the Southern Plains into the Lower to Middle Mississippi Valley Wednesday into Wednesday night/early Thursday morning. These storms will likely produce locally heavy rains..isolated flooding and the risk of severe weather across these regions. As the storm undergoes deepening in the lee of the Central Rockies early Wednesday...heavy snows will develop on the western edge of the storm. Initially...this will be confined to to the Central to Southern Rockies...but will spread east northeastward later Wednesday into portions of the Central to Northern Plains from northeast Colorado..eastern Wyoming...across northwest Nebraska...western to central South Dakota into southeast North Dakota and northwest Minnesota. In addition to the heavy snows across these areas...the deepening low will result in increasing winds with blizzard conditions also possible across these areas. Ahead of the deepening low over the mid section nation...much above average temperatures are forecast Wednesday from eastern portions of the Plains into the Mississippi...Ohio...Tennessee Valleys and Great Lakes states. These much above average temperatures will then spread eastward into the eastern U.S. on Thursday and remain in place for a second day from the Great Lakes into the Mississippi...Ohio and Tennessee Valleys. To the west of this deepening low...much below average temperatures likely through the Southwest...Great Basin and Rockies on Tuesday-Wednesday and spreading into much of the Plains by Thursday. Oravec Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php