Prognostic Meteorological Discussion
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FXUS01 KWBC 170723

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
222 AM EST Sat Feb 17 2018

Valid 12Z Sat Feb 17 2018 - 12Z Mon Feb 19 2018

...Snow possible for parts of the Central Appalachians/Northern
Mid-Atlantic into southern New England...

...Heavy snow possible for the Cascades and the Northern Rockies...

...Heavy rain possible over parts of the Pacific Northwest...

A vast portion of the Pacific Northwest, Great Basin and
Intermountain West will be impacted over the next few days with as
heavy rain and heavy snow overspread the region. Arctic air will
quickly surge southward as the low pressure system moves inland.
Strong onshore flow will generate heavy coastal rains and mountain
snow, which will spread toward the Rockies and south into the
Great Basin as the front pushes through the Southwest and
Central/Southern Rockies by early Monday.

Cold Canadian air will surge into the Northern and Central Plains,
allowing temperatures to fall to below normal for mid-February.
Snow will accompany the front as it makes its way through the
Upper Mississippi Valley and Great Lakes region this weekend and
into portions of the Northeast on Monday.

A front extending from the Southern Mid-Atlantic to the Western
Gulf Coast will have a wave of low pressure develop over the
Central Gulf Coast that will travel to the northeast along the
boundary. The boundary will settle southward over the Southeast by
Sunday morning as well. Scattered to widespread rain will span
from the Southern Plains to the Mid-Atlantic region. Higher
rainfall amounts/rates across portions of the eastern Tennessee
Valley/Central Appalachians today will may increase the risk for


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