Short Range Forecast Discussion
NWS Weather Prediction Center College Park MD
251 AM EST Thu Nov 21 2019
Valid 12Z Thu Nov 21 2019 - 12Z Sat Nov 23 2019
...Heavy mountain snow for parts of the Desert Southwest, Great Basin,
Southern and Central Rockies...
...Heavy snow possible across portions of the Upper Mississippi Valley and
Upper Great Lakes...
...Moderate to heavy rainfall expected through the end of the week across
An upper-level low tracking across the Southwest and into the
Southern/Central Rockies will provide ample lift and instability to help
generate moderate to heavy precipitation--primarily in the form of snow in
the areas of elevated terrain. Surface low pressure traveling along the
sprawling cold front over the southern tier of the country will provide
focus for scattered to widespread rain to track across the
Southern/Central Plains, Lower Mississippi Valley and into the Tennessee
Valley by this weekend. Daily totals of 1 to 2 inches are expected along
with an increased potential for flash flooding, WPC has a Marginal Risk
for excessive rainfall across portions of the South through Sunday
To the north, an area of low pressure lifting to the northeast through the
Great Lakes region Thursday will drag a cold front with it through the
Northeast on Friday and offshore by late Friday night/early Saturday.
Snow, which at times may be heavy, will move across the Upper Mississippi
Valley in through the Upper Great Lakes region. Generally, amounts are
expected to be light across the Northeast.
Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php