Quantitative Precipitation Forecast Discussion
NWS Weather Prediction Center College Park MD
229 AM EDT Sun Apr 01 2018


Prelim Day 1 QPF Discussion
Valid Apr 01/1200 UTC thru Apr 02/1200 UTC
Reference AWIPS Graphics under...Precip Accum - 24hr


Day 1

Central Plains...Mid MS Valley...OH Valley...lower TN
Valley...central Appalachians into the Mid Atlantic

Short wave energy rotating through the base of the very broad mean
trof across the central portion of the nation will support an
increasing area of overrunning precipitation from portions of the
Central Plains...eastward into the Mid MS Valley...OH
Valley...Lower TN Valley...central Appalachians into the Mid
Atlantic day 1.  These height falls will be moving very quickly
eastward this period with a corresponding quick eastward movement
to the broad area of  moderate precipitation expected across these
areas.  Late season accumulating snows possible on the northern
edge of this precipitation shield from southeast NE...far
northeast KS...northern MO...southern IL...southern IN...southern
OH...northern WV...northwest VA...western to northern
MD...southern PA into central NJ.  See the latest QPFHSD for
additional winter weather information across these regions.

Pacific Northwest into the Northern Rockies


Models are in good agreement day 1 with the strong closed low
dropping southeastward across southwest B.C....northern Washington
State into northern ID.  There is also good agreement with
precipitation distributions and amounts from the combination of
large scale lift along the associated inland moving front and then
post frontal onshore cyclonic flow across these areas.  This will
support widespread moderate to locally heavy precip totals likely
in the favored terrain regions of the northern Rockies from
northwest WY into central to northern ID...northwest
MT...northeast OR and through the Washington-Oregon Cascades and
along the northern Oregon coast range into the Olympic range. 
Overall...confidence is high across these regions.

Oravec