Idaho, 2020

Avalanche in Idaho, January 15, 2020

January 15, 2020 · NWS PIH · 1 event in 1 county or zone

An avalanche in the Baker Creek area in Blaine County killed a 50 year old man of Jerome Idaho. Two snowmobliers were caught in the avalanche at about 9,000 feet in elevation and only one survived.

Where it happened

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The toll

Deaths
1
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
1

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.

What happened

The episode as NWS PIH wrote it up.

An avalanche in the Baker Creek area in Blaine County killed a 50 year old man of Jerome Idaho. Two snowmobliers were caught in the avalanche at about 9,000 feet in elevation and only one survived.

What forecasters said that day

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 Pocatello, ID wrote its last area forecast discussion before the first event at Jan 15, 1:31 PM MST, 9 minutes earlier.

Area forecast discussion, Jan 15, 1:31 PM MST, 9 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
131 PM MST Wed Jan 15 2020

.DISCUSSION...A pair of systems will be moving through the
region. The first one arrives tonight. This will bring snow mainly
to the central Idaho mountains roughly from Bellevue to Stanley.
Forecast amounts came down slightly, but still looks like 2 to 6
inches with the heaviest amounts on mountain passes and ridgetop
level. The second system is much more widespread and arrives
Thursday night and persists into Friday. This system will bring
wind to the area beginning around daybreak on Friday. Blowing and
drifting will most likely be problematic with road closures once
again possible, especially in those areas still recovering from
the last series of storms. Forecast snow amounts came down for
this next system as well as the NAM has really backed off on the
amounts, probably because this system is pretty fast-moving.
Still, looking at 2 to 6 corridor from Bellevue to Stanley, as
well as along the eastern highlands. Probably less than 2 inches
elsewhere. Even though there is some uncertainty with the snow
amounts, we are very confident in wind developing and likely
causing problems for eastern Idaho. Therefore we will be issuing a
winter weather advisory for much of east Idaho to specifically
address potential blowing and drifting snow issues.

The parade of storms ends by Saturday as a ridge of high pressure
develops. Could see some light snow in the central mountains and
upper snake highlands on Saturday as moisture rides over the top of
the ridge. But, the ridge will amplify on Sunday and persist
through early next week.

Valle

&&

.AVIATION...After days of low CIG and occasional low VSBT due to
snow, eastern Idaho will get a break until 16/06Z tonight, when the
next low pressure moves in and starts to develop mid- and high level
CIGs. A weak impulse will develop isolated snow showers in the
central Idaho mountains, affecting KSUN, but otherwise nothing
impactful happens until Thu night in terms of CIG/VSBY. However, an
approaching front will mean some potential low level wind shear with
strong south to west wind aloft while surface wind is north to east.
It appears as though during the morning on Thu that these strong
southerly wind will come into alignment as the inversion disappears.
Messick

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 9 PM this evening to noon MST
Thursday for IDZ072>074.

Winter Weather Advisory from midnight Thursday night to midnight
MST Friday night for IDZ052>054-058>067.

&&

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 avalanche. Local standard time, as filed.

Avalanche, Sun Valley Region

When
January 15, 1:40 PM MST to 3:00 PM MST
Where
Sun Valley Region forecast zone
Deaths
1 direct, 0 indirect
Reported by
Park/Forest Service
Coordinates
43.826, -114.131 (the zone’s center; the record gives no point)

An avalanche in the Baker Creek area in Blaine County killed a 50 year old man of Jerome Idaho. Two snowmobliers were caught in the avalanche at about 9,000 feet in elevation and only one survived.

The people who died

As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.

EventDateAgeSexWhereKind
Avalanche, Sun Valley Region2020-01-1550MaleVehicle/Towed TrailerDirect

What these are

Avalanche
A mass of snow sliding down a mountainside that caused a death, an injury or damage.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Idaho in 2020Every state in 2020This day in weather historyWarnings in Idaho, January 2020

Sources

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: 873776.