Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3

000
FXUS01 KWBC 182006
PMDSPD

Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
306 PM EST Sun Feb 18 2018

Valid 00Z Mon Feb 19 2018 - 00Z Wed Feb 21 2018

...Heavy snow possible over the Northern Plains into the Central
Rockies and the Upper Great Lakes...

...Heavy rain possible from parts of the Southern Plains
northeastward to the Great Lakes...

...Rain/freezing rain possible over parts of the Middle/Upper
Mississippi Valley into parts of the Upper Great Lakes...

...Temperatures will be 15 to 40 degrees below average over parts
of the Northern/Central Plains into parts of the Northern
Rockies...

A front extending from the Upper Great Lakes to the Southern High
Plains will become quasi-stationary through Tuesday.  The system
will produce snow over parts of the Upper Great Lakes/Upper
Mississippi Valley into parts of the Northern Plains through
Tuesday.  The snow will expand into parts of the Central Plains on
Monday into Tuesday.  Moisture from the Western Gulf of Mexico
will stream northward into parts of the Central/Southern Plains
into parts of the Lower/Middle Mississippi Valley that will
continue to flow northward into the Western Ohio Valley/Great
Lakes on Monday into Tuesday.  The moisture will aid in producing
showers and thunderstorms over parts of the Southern Plains into
parts of the Lower Mississippi Valley that will expand into parts
of the Middle Mississippi Valley/Western Ohio Valley by Monday
morning continuing through Tuesday.  The moisture will also
produce rain over parts of the Southeast that will lift northward
into the Ohio Valley/Mid-Atlantic by Monday morning.  The rain
will continue to move northward into parts of the Northeast by
Monday evening into Tuesday.  Additionally along the rain/snow
line, rain and freezing rain will develop over parts of the
Central Plains into parts of the Upper Great Lakes Monday morning
into Tuesday.

Meanwhile along the western parts of the storm, the western end of
the front will extend from the Central Rockies into the Great
Basin and Southern California.  The boundary moves eastward to the
Southern High Plains by Tuesday.  The system produces snow from
parts of the Pacific Northwest/Northern California eastward to the
Northern/Central High Plains and coastal rain over parts of the
Northern/Central California Coast that will move southeastward
into the Great Basin/Central Rockies overnight Sunday into Monday.
 The snow will continue to move southeastward into parts of the
Southwest/Southern Rockies and the higher elevations of
Central/Southern California by Monday evening.  The snow will wane
over parts of the Pacific Northwest/Northern Rockies and parts of
California/Great Basin/Southwest by Tuesday.  In addition,
overnight Sunday rain will develop over parts of the Southwest and
Southern California Coast with rain ending over parts of Southern
California Coast by Monday evening.  The rain over the Southwest
will change over to snow overnight Monday into Tuesday.


Ziegenfelder


Graphics available at
www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php
$$





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.