Continuous rain in the area brought an isolated mudslide to the small road in Lewiston.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS OTX wrote it up.
Continuous rain in the area brought an isolated mudslide to the small road in Lewiston.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Spokane, WA wrote its last area forecast discussion before the first event at Dec 27, 2:18 PM PST, 1 hour 12 minutes earlier.
Area Forecast Discussion
National Weather Service Spokane WA
218 PM PST Tue Dec 27 2022
.SYNOPSIS...
An active weather pattern is expected this week. On Tuesday and
Wednesday rain, mountain snow, and windy conditions will impact
much of the region. Additional weather systems will pass through
Thursday through next weekend bringing a mix of rain and snow to
the valleys and snow in the mountains.
&&
.DISCUSSION...
Today and Wednesday: The widespread precipitation across the
Northwest continues early this afternoon. Impressive soaking rain
amounts from the Cascade slopes to north-central Idaho of 0.50 to
over 2.0 inches as of early Tuesday afternoon. The radar continues
to expand upon light to moderate rainfall across northeast
Washington and north Idaho this afternoon and evening. An
additional 0.25 inch to around 1.00 inches is expected tonight
through early Wednesday for eastern Washington and northern
Idaho. A transition to rain/snow mix and mountain snow will take
place through Wednesday, but first we will see wind.
*Wind: Tightening pressure gradients from the surface low off the
WA coast will create a surge of southerly winds from Oregon into
eastern WA this afternoon through Wednesday. Winds will peak this
evening through early Wednesday across the Columbia Basin and the
Palouse, where the strongest gusts will occur. Southwest winds
will be sustained 20 to 30 mph with gusts 45 to 55mph from
Ritzville to Spokane to Coeur d'Alene and northward. We have
upgraded some areas to a high wind warning due to the latest
high-resolution model guidance (HREF, UW-WRF) showing much
stronger winds overnight.
*Snow: Additional snow in the Cascades tonight through Wednesday
and in the central Idaho Panhandle mountains will prompt winter
weather advisories especially for the higher snowfall rates. Snow
of 1 inch per hour will be possible overnight into Wednesday
which will have impacts at Stevens Pass, Holden Village, Lookout
Pass, Mullan Pass and areas on nearby highways. For lower
elevations, we will see the rain transition to snow overnight as
temperatures cool and snow levels lower. Not much accumulation
is expected below 3000 feet.
Temperatures will see a start to gradually cooler day by day with
today being the warmest of the week. /Dewey
Today and Wednesday: The widespread precipitation across the
Northwest continues early this afternoon. Impressive soaking rain
amounts from the Cascade slopes to north-central Idaho of 0.50 to
over 2.0 inches as of early Tuesday afternoon. The radar continues
to expand upon light to moderate rainfall across northeast
Washington and north Idaho this afternoon and evening. An
additional 0.25 inch to around 1.00 inches is expected tonight
through early Wednesday for eastern Washington and northern
Idaho. A transition to rain/snow mix and mountain snow will take
place through Wednesday, but first we will see wind.
*Wind: Tightening pressure gradients from the surface low off the
WA coast will create a surge of southerly winds from Oregon into
eastern WA this afternoon through Wednesday. Winds will peak this
evening through early Wednesday across the Columbia Basin and the
Palouse, where the strongest gusts will occur. Southwest winds
will be sustained 20 to 30 mph with gusts 45 to 55mph from
Ritzville to Spokane to Coeur d'Alene and northward. We have
upgraded some areas to a high wind warning due to the latest
high-resolution model guidance (HREF, UW-WRF) showing much
stronger winds overnight.
*Snow: Additional snow in the Cascades tonight through Wednesday
and in the central Idaho Panhandle mountains will prompt winter
weather advisories especially for the higher snowfall rates. Snow
of 1 inch per hour will be possible overnight into Wednesday
which will have impacts at Stevens Pass, Holden Village, Lookout
Pass, Mullan Pass and areas on nearby highways. For lower
elevations, we will see the rain transition to snow overnight as
temperatures cool and snow levels lower. Not much accumulation
is expected below 3000 feet.
Temperatures will see a start to gradually cooler day by day with
today being the warmest of the week. /Dewey
Thursday through Monday: Not much change from yesterday
overall. Winds will gradually weaken through Wednesday afternoon as
the longwave trough moves eastward. A mix of rain and snow is likely
for lowland locations where daytime temperatures will hover in the
mid-to-upper 30s Thu-Fri. For mountain regions, sub-freezing
temperatures will result in primarily snow. The best chance for snow
accumulations in the valley and basin areas will be Thursday night
Lower elevations can expect a couple inches of snow with higher
amounts in the mountains potentially up to a foot, potentially
impacting pass travel. QPF has been bumped a bit but luckily the QPF
will be drawn out over 24-36 hours so the impacts will likely not be
severe especially since most/all if our current snowpack will have
melted by then.
Temperatures behind this system will drop near or below freezing
through Monday. An upper low will skirt south of WA into OR/CA
keeping us cool and drier. Best precip chances are in the Cascades
and ID Panhandle under westerly h500 winds Saturday and Monday.
/Butler
&&
.AVIATION...
12z TAFS: The primary aviation concerns today will shift from rain
and lower CIGS to stronger winds. Pockets of freezing rain will
linger in the Cascade valleys this morning including KEAT. Moderate
to strong wind shear will be felt across airports in the Basin
into eastern Washington and the Idaho Panhandle. This wind shear
may inhibit ceilings from falling to below marginal VFR through
the afternoon. Except surface level winds to begin to increase
this morning, and peaking between 00Z and 04Z. The strongest
winds will be felt at KGEG, KSFF, KCOE, and KPUW with southwest
winds 15 to 25 knots and gusts 35 to 45 knots with localized gusts
up to 50 knots. JW
&&
.PRELIMINARY POINT TEMPS/POPS...
Spokane 33 40 27 35 30 37 / 90 20 0 30 60 60
Coeur d'Alene 34 40 28 35 31 37 / 100 60 0 20 50 70
Pullman 32 40 27 36 31 38 / 90 30 0 30 60 70
Lewiston 40 47 31 41 35 44 / 80 20 0 30 60 70
Colville 31 43 21 34 28 37 / 70 20 0 20 40 50
Sandpoint 34 40 29 35 31 36 / 100 90 10 20 60 70
Kellogg 33 38 31 35 31 37 / 100 90 30 20 70 90
Moses Lake 31 45 23 35 26 37 / 30 0 0 50 60 50
Wenatchee 33 42 26 30 28 35 / 60 10 0 70 70 60
Omak 33 43 23 29 27 35 / 40 0 0 40 50 40
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory until 7 PM PST Wednesday for Central
Panhandle Mountains-Northern Panhandle.
Wind Advisory until 7 AM PST Wednesday for Coeur d'Alene Area.
High Wind Warning until 7 AM PST Wednesday for Idaho Palouse.
WA...Wind Advisory until 7 AM PST Wednesday for Moses Lake Area-
Spokane Area-Upper Columbia Basin-Waterville Plateau.
High Wind Warning until 7 AM PST Wednesday for Lower Garfield
and Asotin Counties-Washington Palouse.
Winter Weather Advisory until 7 AM PST Wednesday for Western
Chelan County.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SPOKANE WA
219 PM PST TUE DEC 27 2022
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0800 AM HEAVY SNOW 1 W CARLTON 48.24N 120.14W
12/27/2022 M8.0 INCH OKANOGAN WA PUBLIC
FACEBOOK REPORT.
&&The national radar mosaic for the moment the first event began.
1 debris flow. Local standard time, as filed.
Local media reported a small mudslide closing Vineyard Avenue for around 8 hours. Damage was minimal.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Idaho in 2022Every state in 2022This day in weather historyWarnings in Idaho, December 2022
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1073409.