National Weather Summary

By: By the Weather Prediction Center (Posted by Doug Meyers)
By: By the Weather Prediction Center (Posted by Doug Meyers)

...A series of fast-moving frontal systems will bring scattered light rain
and snow from the Great Lakes to the Northeast...

...Showers and thunderstorms possible for portions of the southern Plains and lower Mississippi River valley late today through Sunday...

...Heavy snow possible for the Northern Rockies Sunday night into Monday...

A dip in the upper-level jet stream across the eastern half of the nation
will allow frontal systems to move quickly from the Midwest into the
Northeast through the short range forecast period. The first such storm system is moving from the Great Lakes toward the Northeast this afternoon. Precipitation is generally light with the system, but given the relatively cold air mass in place, the precipitation may mix with or change to snow in some areas of the Upper Great Lakes and the higher elevations of the Northeast tonight. Scattered rain and snow showers will persist on Sunday behind this front as the next frontal system approaches, forecast to move into the Upper Great Lakes Sunday afternoon and into the Northeast by early Monday. Precipitation intensity and type with the second system will
be very similar to the first.

The cold front across the Great Lakes this afternoon extends southwestward to the southern Plains, where an upper-level disturbance is providing some added lift to produce showers and thunderstorms. Scattered to numerous showers and thunderstorms will shift slowly southeastward tonight toward the Gulf Coast. The Storm Prediction Center has outlined portions of north
central Texas in a slight risk for severe thunderstorms through tonight.
For more information on the severe weather threat, please refer to the
Convective Outlook products issued by the Storm Prediction Center.
Scattered showers and thunderstorms will continue on Sunday from the Texas Gulf Coast into the lower Mississippi River valley.

A vigorous upper-level low pressure system will interact with some
additional energy forecast to dive southward from British Columbia on
Sunday. The result will be a rapidly developing storm system across the interior of the West. As the surface low pressure system deepens across the Intermountain West late on Sunday, widespread snow will begin to develop across Montana, and will spread into Wyoming Sunday night. Heavy snow will be possible as well as gusty winds associated with the pressure gradient from the deepening low pressure system. This event will peak on Monday before beginning to weaken.


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