South Pass SNOTEL

9,040 ftFremont County, WyomingNRCS site 775Updated Fri Oct 16, 4:00 AM MDT

Last peak12.2″SWE · Mar 15
Depth0″snow-free since May 12
Temp26°26°–44° 48 h
Thu 15Past 48 hAir temperature26°F now30°40°32°26°FNow · Fri 4 AM
ThuPast 48 hAir temperature26°F now30°40°32°26°FNow · Fri 4 AM
Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Past 7 daysAir temperature26°F now40°60°32°26°FNow · Fri 4 AM
SatSunMonTueWedThuPast 7 daysAir temperature26°F now40°60°32°26°FNow · Fri 4 AM
0″5″10″15″OctNovDecJanFebMarAprMayJunJul
0″10″ONDJFMAMJJ
<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

Last season

12.2″peak snow water equivalent

Last season peaked at 12.2″ of water, 73% of the median peak.

Nearby SNOTEL stations

All Wyoming

Station details

Elevation
9,040 ft
Location
42.5731°N, 108.8432°W
County
Fremont County, Wyoming
Basin
Popo Agie · HUC 10080003
Network
NRCS SNOTEL · site 775
Station ID
775:WY:SNTL · SHEF SPSW4
Reporting since
October 1984
NWS forecast office
Riverton (RIW) discussion

Questions

What is snow water equivalent (SWE)?

SWE is the depth of water you would get by melting the whole snowpack. Fresh powder is often 5 to 10% water; old spring snow can be 40% or more.

How often does South Pass 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 South Pass SNOTEL?

At 9,040 ft in Fremont County, Wyoming (42.5731°N, 108.8432°W), in the Popo Agie 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.