FOUS30 KWBC 010026
QPFERD

Excessive Rainfall Discussion
NWS Weather Prediction Center College Park MD
726 PM EST Tue Dec 31 2024

Day 1
Valid 01Z Wed Jan 01 2025 - 12Z Wed Jan 01 2025

The probability of rainfall exceeding flash flood guidance is less
than 5 percent.

Bann


Day 2
Valid 12Z Wed Jan 01 2025 - 12Z Thu Jan 02 2025

The probability of rainfall exceeding flash flood guidance is less
than 5 percent.

Roth


Day 3
Valid 12Z Thu Jan 02 2025 - 12Z Fri Jan 03 2025

...THERE IS A MARGINAL RISK OF EXCESSIVE RAINFALL FOR SOUTHWEST
OREGON AND NORTHWEST CALIFORNIA...

A strong front associated with a compact low will approach and move
into the Pacific coast of Oregon and California late Thursday
night. IVT values from the GEFS peak at about 600 kg/ms around 12Z
Friday. While river levels have come down a bit from the recent
rainfall and atmospheric river event, expected rainfall on Day
2/Wednesday should bring levels back up and resaturate the soils.
Thus, with this next round Thursday night, the expected 2-4 inches
of rain could still cause isolated instances of flash flooding.
The front does not have a true connection to the tropics, so this
round of rain is expected to be of lighter intensity and lesser
duration than the previous A.R. event.

Roth/Wegman


Day 1 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/94epoints.txt__;!!DZ3fjg!8OHuhvaWhFeIvncmGe8lu5A-DsiHpB8RcUdRonuTe1wk=
qUtURU1Nmgc68jVhDpZ88ZL6uQNtod12iS-z2Cs0viKaO04$=20
Day 2 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/98epoints.txt__;!!DZ3fjg!8OHuhvaWhFeIvncmGe8lu5A-DsiHpB8RcUdRonuTe1wk=
qUtURU1Nmgc68jVhDpZ88ZL6uQNtod12iS-z2Cs0_bYAiXU$=20
Day 3 threat area: https://urldefense.com/v3/__https://www.wpc.ncep.noaa.go=
v/qpf/99epoints.txt__;!!DZ3fjg!8OHuhvaWhFeIvncmGe8lu5A-DsiHpB8RcUdRonuTe1wk=
qUtURU1Nmgc68jVhDpZ88ZL6uQNtod12iS-z2Cs0jcEc7Ic$=20

=3D =3D =3D
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