Prognostic Meteorological Discussion
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000
FXUS01 KWBC 110749
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
249 AM EST THU FEB 11 2016

VALID 12Z THU FEB 11 2016 - 12Z SAT FEB 13 2016

...HEAVY LAKE EFFECT SNOW POSSIBLE DOWNWIND OF LAKES ERIE AND
ONTARIO...

...ARCTIC AIR MASS EXPECTED TO SPREAD INTO MUCH OF THE EASTERN
U.S. BY SATURDAY...

...HEAVY RAIN AND SNOW POSSIBLE IN THE PACIFIC NORTHWEST...

A SERIES OF COLD AIR SURGES HEADED ACROSS THE GREAT LAKES THROUGH
THE NEXT FEW DAYS WILL RESULT IN LAKE EFFECT SNOWS INT HE FAVORED
AREAS DOWNWIND OF THE GREAT LAKES. THROUGH SATURDAY MORNING, SOME
AREAS DOWNWIND OF LAKES ERIE AND ONTARIO MAY RECEIVE UP TO A FOOT
OF ADDITIONAL SNOWFALL. SNOWFALL AMOUNTS OF 5 TO 10 INCHES ARE
POSSIBLE FOR THE SAME TIME PERIOD ACROSS PORTIONS OF MICHIGAN
DOWNWIND OF LAKES SUPERIOR AND MICHIGAN. ON FRIDAY, AN ARCTIC COLD
FRONT WILL MOVE INTO THE GREAT LAKES, AND WILL REACH THE
MID-ATLANTIC AND NORTHEAST BY FRIDAY NIGHT/SATURDAY MORNING. THIS
FRONT WILL USHER IN A FRIGID AIR MASS IN ITS WAKE. TEMPERATURES ON
FRIDAY WILL BE 20 TO 30 DEGREES BELOW AVERAGE ACROSS PORTIONS OF
THE UPPER MIDWEST. BY SATURDAY, THIS COLD AIR MASS WILL OVERSPREAD
MUCH OF THE CENTRAL/EASTERN U.S., WITH HIGH TEMPERATURES 20 TO 30
DEGREES BELOW AVERAGE FOR MUCH OF THE GREAT LAKES, MIDWEST, OHIO
AND TENNESSEE VALLEYS, MID-ATLANTIC, AND THE NORTHEAST.

AN UPPER-LEVEL DISTURBANCE AND A LINGERING STATIONARY FRONTAL
BOUNDARY WILL BRING LIGHT PRECIPITATION TO THE NORTHERN PLAINS
TODAY. A MIXTURE OF RAIN AND SNOW ARE POSSIBLE, WITH SLEET OR
FREEZING RAIN FOR SOME AREAS.

A FRONTAL SYSTEM WILL MOVE INTO THE PACIFIC NORTHWEST TODAY, WITH
PRECIPITATION SPREADING ACROSS THE REGION IN ADVANCE OF THE FRONT.
LOCALLY HEAVY RAIN WILL BE POSSIBLE OVER THE OLYMPICS AND THE
WASHINGTON CASCADES TODAY -- WITH SNOW FALLING AT THE HIGHEST
ELEVATIONS. SNOW LEVELS WILL DECREASE ON FRIDAY AS THE FRONTAL
SYSTEM MOVES INLAND, WITH MORE OF THE CASCADES AND THE OLYMPICS
EXPERIENCING SNOWFALL AS ONSHORE FLOW LINGERS IN THE WAKE OF THE
FRONT. THIS SYSTEM WILL ALSO SPREAD RAIN AND SNOW INTO THE
NORTHERN INTERMOUNTAIN WEST FRIDAY INTO SATURDAY AS IT MOVES
INLAND.


RYAN


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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