A Pacific storm system brought snow to the region on the first two days of March 2018.
Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 PDT wrote it up.
A Pacific storm system brought snow to the region on the first two days of March 2018.
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 Pendleton, OR wrote its last area forecast discussion before the first event at Mar 1, 9:44 AM PST, 16 minutes earlier.
Area Forecast Discussion
National Weather Service Pendleton OR
944 AM PST Thu Mar 1 2018
.SHORT TERM...Morning Update...A large upper level low will remain
just off the Pacific Northwest coast through at least tonight. As
such the Interior Northwest will remain under a southerly upper
level flow. A stronger wave will move across the region tonight.
This wave will also pull a cold front across the area with it,
lowering snow levels some while shifting low level winds to more
westerly directions. Bands of showers can be expected ahead of and
with the front. Instability looks to be marginally strong enough for
the development of stray late afternoon thunderstorms across the
southern Blue mountains, the John Day Basin, the Ochoco-John Day
Highlands, and southern portions of Oregon Cascade east slopes.
Locally windy conditions along the Blue mountain foothills and in
the Grande Ronde valley will gradually decrease through the day.
Updates this morning focused on adjustments to shower coverages,
precip and snow amounts, snow levels, winds and sky cover. 90
.LONG TERM...Previous Discussion...A low pressure system over the
Pacific Northwest Saturday night will slowly drift east only to
allow another storm system to enter WA/OR Sunday and Monday. Clouds
and showers can be expected into the beginning of next week. Some
drier air tries to work its way into the two state area Tuesday but
another storm system will affect the region again during the middle
of the week. Snow levels could be a challenge as temps remain
slightly below normal through the period with mountain snow while
the lower elevations should receive primarily rain.
&&
.AVIATION...18 TAFs...Generally expecting VFR conditions under
a showery pattern over the next 24 hours but could see some areas of
MVFR to IFR conditions in vicinity of locally heavy showers. Showers
could be in the form of snow showers at KRDM and KBDN tonight with a
higher likelihood of IFR conditions due to reduced vsby. In addition
brief wind gusts around 25 kts are possible today especially at KPDT
and KALW.
&&
.PRELIMINARY POINT TEMPS/POPS...
PDT 49 31 47 28 / 70 70 50 20
ALW 51 35 49 31 / 60 80 60 10
PSC 51 35 51 29 / 60 60 40 10
YKM 47 31 50 27 / 30 70 60 10
HRI 50 34 50 29 / 60 60 30 10
ELN 45 30 45 25 / 40 50 70 20
RDM 43 22 42 22 / 50 40 30 20
LGD 43 29 40 23 / 60 60 40 20
GCD 44 25 39 23 / 70 50 30 20
DLS 49 32 49 32 / 30 70 20 20
&&
.PDT WATCHES/WARNINGS/ADVISORIES...
OR...Winter Storm Warning until 4 AM PST Friday for ORZ050-506.
Winter Weather Advisory until 4 AM PST Friday for ORZ049-502-503-
505-509.
WA...Winter Weather Advisory until 4 AM PST Friday for WAZ030.
&&
90/97/91The national radar mosaic for the moment the first event began.
2 heavy snow. Local standard time, as filed.
Measured snow accumulation of 6 inches, 7 miles ENE of Paulina in Crook county.
Measured snow accumulation of 7 inches, 7 miles NNE of Lostine in Wallowa county. Snow mainly fell in the late afternoon and evening.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Oregon in 2018Every state in 2018This day in weather historyWarnings in Oregon, March 2018
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: 740199, 740198.