Trinity Mountain SNOTEL

7,790 ftElmore County, IdahoNRCS site 830Updated Fri Oct 16, 4:00 AM MDT

SWE0.3″300% of median
Depth2″0″ 48 h
Temp35°24°–52° 48 h
Thu 15Past 48 hSnow water equivalent0.3″ now-0.500.50.3″Snow depth2″ now022″Air temperature35°F now40°32°35°FNow · Fri 4 AM
ThuPast 48 hSnow water equivalent0.3″ now-0.500.50.3″Snow depth2″ now022″Air temperature35°F now40°32°35°FNow · Fri 4 AM
Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Past 7 daysSnow water equivalent0.3″ now-0.500.50.3″Snow depth2″ now02.52″Air temperature35°F now25°50°32°35°FNow · Fri 4 AM
SatSunMonTueWedThuPast 7 daysSnow water equivalent0.3″ now-0.500.50.3″Snow depth2″ now02.52″Air temperature35°F now25°50°32°35°FNow · Fri 4 AM
0″20″40″OctNovDecJanFebMarAprMayJunJulMedian peak 37.8″ · Apr 210.3″ today · 300% of median
0″20″40″ONDJFMAMJJMedian peak 37.8″ · Apr 210.3″ today · 300% of median
<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

300%of the 1991–2020 median for today

0.3″ of water today against a median of 0.1″, 200% above median. The median peak is 37.8″ around April 21.

Nearby SNOTEL stations

All Idaho
StationElevationDepth, 7 daysSWE% medianDepth48 h
PrairieID · 11 mi4,800 ft0.0″—0″0″
Atlanta SummitID · 13 mi7,570 ft0.0″—0″0″
Mores Creek SummitID · 24 mi6,090 ft0.2″—0″0″
Graham Guard StationID · 24 mi5,690 ft0.0″—0″0″
Camas Creek DivideID · 26 mi5,720 ft0.0″—0″0″
Jackson PeakID · 29 mi7,060 ft2.5″———
Vienna MineID · 32 mi8,930 ft0.0″—1″+1″
Soldier Ranger StationID · 32 mi5,780 ft0.0″—0″0″

Station details

Elevation
7,790 ft
Location
43.6290°N, 115.4382°W
County
Elmore County, Idaho
Basin
North and Middle Forks Boise · HUC 17050111
Network
NRCS SNOTEL · site 830
Station ID
830:ID:SNTL · SHEF TRMI1
Reporting since
October 1978
NRCS name
Trinity Mtn.
NWS forecast office
Boise (BOI) discussion

Questions

What is snow water equivalent (SWE)?

SWE is the depth of water you would get by melting the whole snowpack. Trinity Mountain's 2″ of snow holds 0.3″ of water, so the pack is about 15% water. Fresh powder is often 5 to 10%; old spring snow can be 40% or more.

How often does Trinity Mountain 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 Trinity Mountain SNOTEL?

At 7,790 ft in Elmore County, Idaho (43.6290°N, 115.4382°W), in the North and Middle Forks Boise 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.