Onion Park SNOTEL

7,420 ftMeagher County, MontanaNRCS site 1008Updated Fri Oct 16, 4:00 AM MDT

SWE0.9″no median
Depth4″−2″ 48 h
Temp26°21°–38° 48 h
Thu 15Past 48 hSnow water equivalent0.9″ now10.9″Snow depth4″ now2.554″Air temperature26°F now20°40°32°26°FNow · Fri 4 AM
ThuPast 48 hSnow water equivalent0.9″ now10.9″Snow depth4″ now2.554″Air temperature26°F now20°40°32°26°FNow · Fri 4 AM
Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Past 7 daysSnow water equivalent0.9″ now0120.9″Snow depth4″ now0104″Air temperature26°F now50°32°26°FNow · Fri 4 AM
SatSunMonTueWedThuPast 7 daysSnow water equivalent0.9″ now0120.9″Snow depth4″ now0104″Air temperature26°F now50°32°26°FNow · Fri 4 AM
0″5″10″15″OctNovDecJanFebMarAprMayJunJulMedian peak 15.6″ · Apr 260.9″ today
0″10″ONDJFMAMJJMedian peak 15.6″ · Apr 260.9″ today
<50%50–6970–8990–109110–129130–149150%+
0″2″8″16″32″+
0″6″24″48″100″+
Map
Open in the Vertex map

Next 3 days

The forecast for this station is on its way.

16-day outlook, three models

Snowpack vs. median

—%of the 1991–2020 median for today

Nearby SNOTEL stations

All Montana
StationElevationDepth, 7 daysSWE% medianDepth48 h
Stringer CreekMT · 3 mi6,550 ft0.9″—3″−2″
Deadman CreekMT · 12 mi6,440 ft0.6″—2″−3″
Spur ParkMT · 14 mi8,080 ft1.8″180%8″−2″
Daisy PeakMT · 30 mi7,590 ft1.2″400%9″−1″
Pickfoot CreekMT · 30 mi6,680 ft1.7″—7″−3″
Elk Peak AltMT · 31 mi7,820 ft2.3″—12″−3″
Boulder MountainMT · 32 mi7,890 ft1.4″233%7″−1″
PorcupineMT · 58 mi6,480 ft0.5″—4″0″

Station details

Elevation
7,420 ft
Location
46.9135°N, 110.8536°W
County
Meagher County, Montana
Basin
Smith · HUC 10030103
Network
NRCS SNOTEL · site 1008
Station ID
1008:MT:SNTL · SHEF ONPM8
Reporting since
October 1992
NWS forecast office
Great Falls (TFX) discussion

Questions

What is snow water equivalent (SWE)?

SWE is the depth of water you would get by melting the whole snowpack. Onion Park's 4″ of snow holds 0.9″ of water, so the pack is about 23% water. Fresh powder is often 5 to 10%; old spring snow can be 40% or more.

How often does Onion Park SNOTEL update?

The station reports every hour by radio telemetry to the USDA Natural Resources Conservation Service. This page refreshes each hour. Readings are provisional until NRCS quality control.

What does “% of median” mean?

It compares today’s SWE with the 1991–2020 median for the same calendar day at this station. Above 100% means more water in the snowpack than on a typical year’s same date.

Where is Onion Park SNOTEL?

At 7,420 ft in Meagher County, Montana (46.9135°N, 110.8536°W), in the Smith basin.

How is the snow forecast made?

Vertex runs the HRRR, RRFS and GFS weather models at the station’s own elevation and carries the measured snowpack forward hour by hour. Treat it as guidance, and check your avalanche center’s forecast before heading out.