The Weather Prediction Center

Short Range Forecast Discussion

[Abbreviations and acronyms used in this product]
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Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
246 AM EST Mon Feb 20 2017

Valid 12Z Mon Feb 20 2017 - 12Z Wed Feb 22 2017

...Slight risk of severe thunderstorms over parts of the Southern
Plains continuing into Monday morning...

...Heavy snow possible for the Sierras, Sawtooth and Wind
River/Absaroka Ranges...

...Heavy rain likely for portions of Northern/Central California--
possible for the Pacific Northwest coast...

...Heavy rain possible for portions Western/Central Gulf Coast...

Much of the West Coast will remain in an active wet pattern
through mid-week as multiple Pacific fronts move through the
region. A nearly continuous plume of moisture will be directed
toward portions of central and northern California through
Tuesday-- resulting in heavy rainfall along the coast and valleys;
with mountain snow. Snow and lower elevation rain will also
develop over parts of the Northern Intermountain region through
Tuesday as the the front pushes out into the High Plains.
Additionally, northern stream upper-level energy associated with
the deep upper-level trough over the Rockies will move to the
Great Lakes by Tuesday morning.  The energy will aid in producing
rain over parts of the Northern Plains/Upper Mississippi Valley
today and spreading into the Great Lakes/Western Ohio valley by
Tuesday morning.

A strong line of thunderstorms developed Sunday evening along and
ahead of the eastward-moving cold front through the
Southern/Central Plains. The showers and thunderstorms are
expected to move east into the Lower/Mid-Mississippi valley by
this afternoon, extending northward into the Tennessee valley.
Warm Gulf air streaming northward along the front will help
maintain higher precipitation for the Gulf states. Heavy rainfall
may develop and increase the threat for flash flooding. Please
refer to WPC excessive rainfall outlooks for additional
information on the risk for heavy rain and flash flooding.


Graphics available at

Last Updated: 246 AM EST Mon Feb 20 2017