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Mount St. Helens Worm Flows

Backcountry route · Washington · Mount St. Helens · 2,654 ft

Base todayBare or trace

under 3 in at June Lake · 1 mi · 3,440 ft · read 11 Nov

The next 6 weeks

Each week against its own normal. Models initialized 7 Nov.

Weekly scoreBase depthSnowfall?Temp. vs normal
7–13 NovPoor bet?+3.4 °C vs normalBare or tracenormally under 3 inMuch less than usual+3.4 °C
14–20 NovPoor bet?+2.1 °C vs normalBare or tracenormally under 3 inLess than usual+2.1 °C
21–27 NovPoor bet?+1.2 °C vs normalWell below normal1 in · normally 6 inLess than usual+1.2 °C
28 Nov – 4 DecPoor bet?+1.7 °C vs normalWell below normal2 in · normally 11 inLess than usual+1.7 °C
5–11 DecPoor bet?+1.4 °C vs normalWell below normal6 in · normally 18 inNear normal+1.4 °C
12–18 DecPoor bet?+1.7 °C vs normalWell below normal8 in · normally 25 inLess than usual+1.7 °C

Season outlook

Expected base depth each month vs. normal, from models initialized November 2026.

Monthly score

November
Poor bet
2 in expected · normally 5 in · 21st percentile
December
Poor bet
12 in expected · normally 31 in · 19th percentile
January
Poor bet
28 in expected · normally 47 in · 12th percentile
February
Poor bet
32 in expected · normally 66 in · 12th percentile
March
Poor bet
35 in expected · normally 80 in · 10th percentile
April
Poor bet
31 in expected · normally 73 in · 13th percentile

Base depth outlook

The chance this month's base is below, near or above this mountain's normal.

November
Well below normal
68% below24%
Base depth odds: 68% below · 24% near · 8% above normal
December
Well below normal
76% below18%
Base depth odds: 76% below · 18% near · 7% above normal
January
Well below normal
77% below16%
Base depth odds: 77% below · 16% near · 7% above normal
February
Well below normal
80% below14%
Base depth odds: 80% below · 14% near · 6% above normal
March
Well below normal
82% below12%
Base depth odds: 82% below · 12% near · 6% above normal
April
Well below normal
80% below14%
Base depth odds: 80% below · 14% near · 6% above normal

Snow station

The base and the outlook for this route come from the June Lake station, 786 ft above the trailhead. A station above the trailhead reads deep and holds its snow longer than the trailhead does.

The place

Before you go

The forecast and score here cover snow, sun and rain at the lot and on the snowfield above it. They leave out avalanche hazard, wind, finding your way in cloud, and whether the road is open. Check the avalanche forecast and the road status before you go.

Northwest Avalanche Center ↗

Mount Rainier road status ↗