Grassy Lake SNOTEL

7,330 ftTeton County, WyomingNRCS site 499Updated Fri Oct 16, 4:00 AM MDT

Last peak18.4″SWE · Mar 8
Depth0″snow-free since May 13
Temp——–— 48 h
Thu 15Past 48 hAir temperature31.5°32°32.5°32°Now · Fri 4 AM
ThuPast 48 hAir temperature31.5°32°32.5°32°Now · Fri 4 AM
Sat 10Sun 11Mon 12Tue 13Wed 14Thu 15Past 7 daysAir temperature31.5°32°32.5°32°Now · Fri 4 AM
SatSunMonTueWedThuPast 7 daysAir temperature31.5°32°32.5°32°Now · Fri 4 AM
0″10″20″30″OctNovDecJanFebMarAprMayJunJul
0″20″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

18.4″peak snow water equivalent

Last season peaked at 18.4″ of water, 54% of the median peak.

Nearby SNOTEL stations

All Wyoming

Station details

Elevation
7,330 ft
Location
44.1260°N, 110.8343°W
County
Teton County, Wyoming
Basin
Lower Henrys · HUC 17040203
Network
NRCS SNOTEL · site 499
Station ID
499:WY:SNTL · SHEF GRSW4
Reporting since
September 1962
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 Grassy Lake 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 Grassy Lake SNOTEL?

At 7,330 ft in Teton County, Wyoming (44.1260°N, 110.8343°W), in the Lower Henrys 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.