Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
356 AM EST Tue Dec 16 2014
Valid 12Z Tue Dec 16 2014 - 12Z Thu Dec 18 2014
...A wintry mix of precipitation possible for interior New England...
...Much needed wet pattern will continue for drought-stricken California...
A wrapped up surface cyclone that tracked through the Midwest on Monday
will gradually weaken while lifting through the Great Lakes region on
Tuesday. Widespread...but light...snow showers...will be possible to the
northwest of the low track...and scattered showers are expected with the
trailing cold front crossing the Appalachians. The front should push out
into the Atlantic early Tuesday...and conditions will quickly clear out
across the Eastern U.S.; however...a surface low deepening off the New
England coast will bring a round of moderate to heavy precipitation inland
over Northeast. Temperatures will be low enough to support a wintry mix
of precipitation across interior New England.
Multiple Pacific systems moving inland will allow the much needed wet
pattern to continue across the western U.S...especially for the extreme
drought-stricken California. Surges of moisture with each approaching
system...combined with orographic effects...should produce periods of
moderate to heavy rains along the California coast...and beneficial
snowfall accumulations are expected to pile up along the Sierra Nevada
Late in the forecast period...upper energy swinging out of the Southwest
and moisture making a return from the Western Gulf of Mexico will help
ignite and fuel an axis of precipitation across the Southern to Central
Plains on Wednesday.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php