Short Range Forecast Discussion...Amended
NWS Weather Prediction Center College Park MD
400 AM EST Wed Jan 16 2019
Valid 12Z Wed Jan 16 2019 - 12Z Fri Jan 18 2019
...Major winter storm for California Wednesday and Thursday...
...Cold across the northern tier of the nation...
A major winter storm will hammer much of California through early Thursday
as a deep surface low tracks towards the coast. An impressive surge of
deep moisture ahead of the cold front through Wednesday night will produce
widespread heavy rain across the lower elevations of the West Coast
states, with 2 to 4 inches of rain likely for many areas. A broad slight
risk area for excessive rainfall encompasses much of central California,
and a moderate risk for the mountainous terrain near Los Angeles, along
with the possibility of mud slides.
Blizzard conditions are expected for the higher elevations of the Sierra
Nevada through early Thursday with a few to several feet of new snow at
elevations over 7000 feet and winds in excess of 50 mph forecast. Very
heavy snow is also expected for the mountains of northern California and
extending northward across the Cascades. As the storm system moves inland
across the Intermountain West, numerous snow showers are expected from
Nevada to western Colorado, and these could be heavy at times.
Elsewhere across the nation, frigid temperatures will remain in place
across the Dakotas and the Upper Midwest after the passage of a strong
cold front. In fact, high temperatures will be nearly 10-20 degrees below
normal. There should be enough moisture with this front to produce some
light snow over the lower Great Lakes and across New England.
With a large surface high over the Gulf Coast region, return flow from the
Gulf of Mexico will bring an increase in moisture through eastern Texas
and into the central Plains, where some showers are likely on Wednesday.
Precipitation will spread north and east across the Mississippi Valley on
Thursday as a front pushes eastward across the Mississippi Valley and then
the Mid-Atlantic region. Along the northern portions of the Great Lakes
and Ohio Valley, expect some snow and a wintry mix with this system from
Thursday night and into Friday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php