Teton Pass Backcountry

BTAC has almost certainly closed out their forecast season, which is why you're seeing No Rating. That doesn't mean the hazard is gone — it means nobody's watching it professionally anymore. At 31 inches of remaining snowpack in late May, you're skiing a heavily settled, isothermal base. The main threat this time of year is wet loose and wet slab activity driven entirely by solar radiation and temperature. Watch for classic signs in the field: recent debris, shooting cracks, any whoumpfing. If the snow surface is punchy or balling under your ski, the window is closing for the day.

Weather is genuinely good through Saturday. Highs of 48–57°F with light SW winds under 8 mph, mostly sunny skies, and essentially zero precip chance. Those winds are too light to create any meaningful wind slab loading. Friday and Saturday are your clean days — get on north-facing aspects early when the surface is still frozen and firm, and plan to be off steep terrain before solar warming peaks around midday. North and northeast aspects will hold cold snow longer than anything else at this point in the season.

Sunday changes the calculus. High of 63°F with afternoon showers and thunder showing up at 19% probability. That's a warm, unstable afternoon — wet loose will run on any sun-exposed slope, and convective storms can fire fast in the Tetons. If you're touring Sunday, make it a morning-only mission on shaded terrain and be back at the car before noon. Don't get caught on a ridgeline with afternoon thunder building.

Note: the SNOTEL data feeding this briefing (Annie Springs, Long Lake, McNeil Canyon) doesn't match Teton Pass geography — those are California stations. Treat the 31-inch reported depth as the best available number but verify conditions on the ground. With nearly 15 hours of daylight, you have plenty of window to be strategic — early starts, conservative terrain on warm afternoons, and trust your field observations over any forecast given the season-end gap in coverage.