Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
502 AM EDT Sat Apr 22 2017
Valid 12Z Sat Apr 22 2017 - 12Z Mon Apr 24 2017
...There is a slight risk of severe thunderstorms over the Lower
Mississippi Valley and Tennessee Valley...
...Heavy rain possible from parts of the Mid-Atlantic to the Tennessee
...Snow is possible for parts of the Northern Rockies and Cascades...
Low pressure over the Lower Mississippi Valley will move northeastward to
the Southeast/Southern Appalachians by Sunday morning and to near the
Southeast Coast by Sunday evening. The system will produce showers and
thunderstorms from parts of the Mid-Atlantic to the Middle/Lower
Mississippi Valley and parts of the Southern Plains that will move to the
Southeast/Southern Appalachians and continuing eastward to the
Mid-Atlantic Coast by Sunday evening.
Meanwhile, low pressure over Southeastern Canada will slowly dissipate by
Sunday morning. The system will aid in producing rain over parts of the
Northeast that will end by Sunday morning. A front over South-Central
Canada will move southward into the Great Lakes to the Northern High
Plains by Sunday evening. Rain will develop over parts of Northern
Plains/Upper Mississippi Valley by Saturday evening and expanding into the
Upper Great Lakes by Sunday morning. The rain will wane to an area over
the Upper Mississippi Valley by Sunday evening.
A front will move onshore over the West Coast on Saturday morning moving
inland to parts of the Northern High Plains to Southern California by
Sunday evening. The storm will produce rain over parts of the Pacific
Northwest/Northern California Coast on Saturday morning that will expand
inland to parts of the Northern Intermountain Region overnight Saturday.
By Sunday morning, rain and higher elevation snow will develop over parts
of the Northern Rockies and expand into parts of the Northern High Plains
by Sunday evening.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php