StormDrop
Data-Driven Season Analysis

25-26 Ski Season
Report Cards

How did 8 regions really perform this season? NWS accuracy grades, storm rankings, and SNOTEL ground truth data — the numbers the resorts won't put in their snow reports.

8 regions analyzed
Best: Lake Tahoe (A)
Avg NWS error: 64% overpredicted
25-26 Season · 5 resorts

Lake Tahoe

A
Excellent

Above-average snowfall with reliable forecasting

432"
Avg Season
30%
NWS Error
8.3"
Best /day
Best resort: Kirkwood (500")
25-26 Season · 7 resorts

Utah Wasatch

A
Excellent

Above-average snowfall with reliable forecasting

417"
Avg Season
30%
NWS Error
8.6"
Best /day
Best resort: Alta (514")
25-26 Season · 1 resort

Mammoth & Eastern Sierra

A
Excellent

Above-average snowfall with reliable forecasting

400"
Avg Season
30%
NWS Error
6.7"
Best /day
Best resort: Mammoth Mountain (400")
25-26 Season · 2 resorts

Jackson Hole & Grand Tetons

B
Good

Solid season with generally accurate forecasts

480"
Avg Season
100%
NWS Error
8.3"
Best /day
Best resort: Grand Targhee (500")
25-26 Season · 9 resorts

Colorado Summit & Vail Valley

B
Good

Solid season with generally accurate forecasts

356"
Avg Season
100%
NWS Error
8.3"
Best /day
Best resort: Vail (496")
25-26 Season · 3 resorts

Big Sky & Northern Rockies

B
Good

Solid season with generally accurate forecasts

354"
Avg Season
72%
NWS Error
6.7"
Best /day
Best resort: Big Sky (400")
25-26 Season · 6 resorts

Pacific Northwest Cascades

C
Average

Average snowfall but uneven forecast reliability

363"
Avg Season
67%
NWS Error
10.7"
Best /day
Best resort: Mt. Baker (640")
25-26 Season · 6 resorts

Colorado Front Range

C
Average

Average snowfall but uneven forecast reliability

268"
Avg Season
85%
NWS Error
5.9"
Best /day
Best resort: Winter Park (356")

How StormDrop Grades the Season

We cross-reference NWS snowfall forecasts against SNOTEL ground-truth snow depth sensors at each resort. Over the season, this builds a resort-specific forecast accuracy profile — so when the next storm rolls in, you know whether to trust the headline number or apply StormDrop's calibration.

A0–20% overpredict
B20–40% overpredict
C40–60% overpredict
D60–80% overpredict
F80%+ overpredict

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