Subj : HVYRAIN: Excessive Rainfall Discussion
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Thu Jan 18 2024 08:08:26

FOUS30 KWBC 180808
QPFERD

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
307 AM EST Thu Jan 18 2024

Day 1
Valid 12Z Thu Jan 18 2024 - 12Z Fri Jan 19 2024

....THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL ACROSS PORTIONS
OF WESTERN WASHINGTON AND NORTHWEST OREGON...

A Marginal Risk was maintained across portions of the Olympic
Peninsula southward into northwestern Oregon, where moderate to
heavy rainfall, along with snow melt in some areas may lead to
excessive runoff.  Guidance shows precipitation spreading north
with a well-defined warm front lifting across the region today.=20
GFS and ECMWF IVT indicate significant moisture transport into the
region beginning later this morning.  Model consensus shows 1-2
inches, with locally heavier amounts across the region.  The
heaviest amounts are expected along the southern slopes of the
Olympics, where upslope flow is likely to bolster amounts.  This
along with rising snow levels and low-level snow melt may raise
the threat for isolated excessive runoff.

Pereira


Day 2

The Day 2 outlook will be updated by 0830Z.


Day 3

The Day 3 outlook will be updated by 0830Z.


Day 1 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/94epoints.txt__;!!DZ3fjg!4oSer952rvOu457ZJnEgklFX11sOaeo90BBDvyHjGpTH=
ByGYZKOY6_Prt1cHMQvpAFbLmhCdcatVW3g-07Fvs63YlX4$=20
Day 2 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/98epoints.txt__;!!DZ3fjg!4oSer952rvOu457ZJnEgklFX11sOaeo90BBDvyHjGpTH=
ByGYZKOY6_Prt1cHMQvpAFbLmhCdcatVW3g-07FvwU3MQHg$=20
Day 3 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/99epoints.txt__;!!DZ3fjg!4oSer952rvOu457ZJnEgklFX11sOaeo90BBDvyHjGpTH=
ByGYZKOY6_Prt1cHMQvpAFbLmhCdcatVW3g-07FvcwQy9Kg$=20


$$



=3D =3D =3D
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