Snoqualmie / Alpental
WA · 5,400 ft summit · SEA
NWS Grade
2025–26 Season Snapshot
Storms This Season
125
storms tracked
Season Snowfall
194"
calibrated total
Best Storm
64/100
Epic
Current Snowpack
44"
Olallie Meadows + Stampede Pass
Avg Daily Rate
1.2"/day
storms with data
Season SWE
21.4"
snow water equivalent
NWS Forecast Accuracy
NWS overpredicts by 61.2% at Snoqualmie / Alpental
Our calibrated estimates are based on 8 verified storms. When NWS says 12 inches, reality is closer to 5 inches. Don't book flights based on NWS numbers alone.
Only 2 of 8 storms have complete verification data; both major storms (40–55" forecast) verify at 49–67% of prediction. Minimal storms (0.4–1.5") with elevated snow levels fail entirely (0% verification). High wind forecasts (12–14 mph) do not correlate with forecast error direction. No rain risk events in dataset. Data limited to March 2026 window; seasonal applicability unknown.
Based on 8 verified storms · SNOTEL ground truth (Olallie Meadows + Stampede Pass)
Storm History — 2025–26 Season
Apr 17 – Apr 17
NWS Forecast
0.1"
Calibrated
—
Actual (SNOTEL)
Pending
Density: Average
Apr 15 – Apr 16
NWS Forecast
5.2"
Calibrated
2.0"
Actual (SNOTEL)
Pending
Density: Light
Rate: 2.0"/day
Apr 15 – Apr 16
NWS Forecast
5.6"
Calibrated
2.2"
Actual (SNOTEL)
Pending
Density: Light
Rate: 2.2"/day
Show 122 more storms
Apr 15 – Apr 16
Level 2 · 2" calibrated
Apr 15 – Apr 16
Level 2 · 2" calibrated
Apr 15 – Apr 16
Level 2 · 2" calibrated
Apr 15 – Apr 16
Level 2 · 2" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 2" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 15 – Apr 16
Level 2 · 3" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 2 · 4" calibrated
Apr 14 – Apr 16
Level 1 · 4" calibrated
Apr 3 – Apr 3
Level 1 · 0" calibrated
Apr 3 – Apr 3
Level 1 · 0" calibrated
Apr 3 – Apr 3
Level 1 · 0" calibrated
Apr 3 – Apr 3
Level 1 · 0" calibrated
Apr 2 – Apr 3
Level 1 · 0" calibrated
Apr 2 – Apr 3
Level 1 · 0" calibrated
Apr 2 – Apr 3
Level 1 · 0" calibrated
Apr 2 – Apr 3
Level 1 · 0" calibrated
Apr 2 – Apr 3
Level 1 · 1" calibrated
Apr 2 – Apr 3
Level 1 · 1" calibrated
Apr 2 – Apr 3
Level 1 · 1" calibrated
Apr 2 – Apr 3
Level 1 · 1" calibrated
Apr 2 – Apr 3
Level 1 · 1" calibrated
Apr 2 – Apr 3
Level 1 · 2" calibrated
Apr 2 – Apr 3
Level 1 · 2" calibrated
Apr 2 – Apr 3
Level 2 · 2" calibrated
Apr 2 – Apr 3
Level 2 · 2" calibrated
Apr 2 – Apr 3
Level 2 · 2" calibrated
Apr 2 – Apr 3
Level 2 · 3" calibrated
Apr 2 – Apr 3
Level 2 · 3" calibrated
Apr 2 – Apr 2
Level 2 · 2" calibrated
Apr 2 – Apr 2
Level 2 · 3" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Apr 1 – Apr 1
Level 1 · 0" calibrated
Mar 30 – Mar 30
Level 1 · 0" calibrated
Mar 30 – Mar 30
Level 1 · 0" calibrated
Mar 30 – Mar 30
Level 1 · 0" calibrated
Mar 30 – Mar 30
Level 1 · 1" calibrated
Mar 30 – Mar 30
Level 1 · 1" calibrated
Mar 30 – Mar 30
Level 1 · 1" calibrated
Mar 30 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 29 – Mar 30
Level 1 · 1" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 0" calibrated
Mar 26 – Mar 26
Level 1 · 1" calibrated
Mar 26 – Mar 26
Level 1 · 1" calibrated
Mar 26 – Mar 26
Level 1 · 1" calibrated
Mar 26 – Mar 26
Level 1 · 1" calibrated
Mar 25 – Mar 26
Level 1 · 1" calibrated
Mar 25 – Mar 26
Level 1 · 1" calibrated
Mar 25 – Mar 26
Level 1 · 1" calibrated
Mar 25 – Mar 26
Level 1 · 1" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 25 – Mar 26
Level 1 · 2" calibrated
Mar 24 – Mar 24
Level 1 · 0" calibrated
Mar 24 – Mar 24
Level 1 · 0" calibrated
Mar 24 – Mar 24
Level 1 · 0" calibrated
Mar 24 – Mar 24
Level 1 · 0" calibrated
Mar 24 – Mar 24
Level 1 · 0" calibrated
Mar 21 – Mar 21
Level 1 · 0" calibrated
Mar 21 – Mar 21
Level 1 · 0" calibrated
Mar 16 – Mar 16
Level 1 · 0" calibrated
Mar 16 – Mar 16
Level 1 · 0" calibrated
Mar 16 – Mar 16
Level 1 · 1" calibrated
Mar 15 – Mar 16
Level 1 · 1" calibrated
Mar 15 – Mar 16
Level 1 · 1" calibrated
Mar 15 – Mar 16
Level 1 · 1" calibrated
Mar 11 – Mar 14
Level 4 · 16" calibrated
Mar 10 – Mar 13
Level 4 · 21" calibrated
Local Knowledge
TGR Community IntelStorm Day Strategy
Monitor Snoqualmie Pass road conditions via DOT. I-90 section of Highway 906 experienced washout (2025-12-11). Plan mid-week for better conditions. Freezing levels at sea level during strong storms = rain at lower elevations, snow at upper elevations. Alpental (higher elevation) more favorable than Summit West during marginal conditions.
Terrain Opening Patterns
Snoqualmie / Summit West
Opens: Late December, after snowmaking operations
2025-12-22 opened after snowmaking efforts. Typically opens after Stevens and Baker due to lower elevation.
Alpental
Opens: Early January
2026-01-03 opening announced. Opening delayed until natural snow base sufficient. Closed 7pm-midnight Thursday-Saturday for winch grooming.
Powder Stashes
7th (run at Stevens)
Stevens Pass, front side
2026-02-10: Held the best snow by wide margin in dust-on-crust conditions
Off-piste terrain
Snoqualmie / Summit West
2026-01-28: Off-piste snow quality improved after crust softened
Full local intelligence for Snoqualmie / Alpental
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Based on 39 community reports · 2018-03-27 → 2026-02-18
Road & Access
Snoqualmie Pass
UnknownWSDOT data unavailable.
Historical Patterns
Temperature effect: Average temperatures around 25–28°F produce high-density snow (5.6:1) but NWS overestimates total depth; warmer ridge events (max 39°F) do not reduce forecast bias proportionally, suggesting NWS models underweight heavy wet snow compaction.
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