⚠ NW Forest Pass required for the Heliotrope Ridge trailhead. Climbing register at the trailhead. North Cascades National Park boundary lies above.
🧠 Decision support, not a verdict. This score is a model — verify it against NWAC, the UW forecast, and your own read of the conditions before you commit to a tour. How it works →

Thursday, Jun 11 tomorrow

0 /100
Corn Score

⛔ NOT CORN CONDITIONS: Rain detected: destroys corn surface, creates ice crust

🌙 44°F overnight low ☀️ 50°F daytime high 💨 23 mph wind ❄️ 0" new snow 🔄 7 streak
Confidence 72%
0–44 poor · 45–69 marginal · 70–100 good · methodology

How this score was built ⓘ

  • ⛔ Veto → 0
  • Refreeze (× 0.5) 🏔️ 88% route froze +28.7
  • Warming (× 0.3) +30.0
  • Streak bonus (capped at 20) +20
  • Pre-veto would have been 78.7 / 100

Why this score?

  • ⛔ Veto: Rain detected: destroys corn surface, creates ice crust — score forced to 0.

Condition Components ⓘ

🥶 Refreeze ⓘ

57/100

Air low: 44°F → surface ~41°F (radiative -2°F), Cloud: 69%, Wind: 5 mph, Dew: 37°F, Freezing level: ~6,575 ft (88% of route froze)

⚠ Heliotrope above freezing — score boosted by route-frozen fraction (88% of route froze after radiative cooling)
SNOTEL Coleman Saddle (NWS) NWS interpolated

☀️ Warming ⓘ

100/100

High: 50°F (good corn window)

NWS

🔄 Streak ⓘ

7 days

Consecutive freeze/thaw days (observed: 0)

💨 Wind ⓘ

23 mph

Max wind (mph) at Coleman Saddle

⛔ Rain detected: destroys corn surface, creates ice crust

Sanity-check this ⓘ

7-Day Outlook ⓘ

Thu
Jun 11
0/100
Lo: 44°
Hi: 50°
🏔️ FL 6,575′
Day: Sunny Night: Partly Cloudy 61% cl · 4 mph · dew 38°
high conf
tap for details
Fri
Jun 12
74/100
Lo: 39°
Hi: 54°
🏔️ FL 6,520′
Day: Sunny Night: Mostly Clear 25% cl · 6 mph · dew 40°
med conf
tap for details
Sat
Jun 13
54/100
Lo: 43°
Hi: 60°
🏔️ FL 8,237′
Day: Sunny Night: Mostly Clear 16% cl · 8 mph · dew 42°
med conf
tap for details
Sun
Jun 14
28/100
Lo: 52°
Hi: 66°
Day: Sunny Night: Mostly Clear 9% cl · 9 mph · dew 44°
med conf
tap for details
Mon
Jun 15
6/100
Lo: 57°
Hi: 67°
Day: Mostly Sunny Night: Mostly Clear 13% cl · 7 mph · dew 45°
med conf
tap for details
Tue
Jun 16
15/100
Lo: 57°
Hi: 61°
Day: Mostly Sunny Night: Partly Cloudy 41% cl · 7 mph · dew 48°
med conf
tap for details
Wed
Jun 17
?/100
Lo: 60°
low conf
tap for details

Freeze/Thaw History ⓘ

Recent Snowfall ⓘ

Day New Snow
Heliotrope 4,040′		 Est. Coleman Saddle
~9,000′		 Source
confidence		 SWE Δ
in / 24h		 Precip
in / 24h		 Depth Low / High
Wed Jun 10 — — none high +0.00 0.4 0" 33° / 45°
Tue Jun 9 — — none high +0.00 1.0 0" 36° / 43°
Mon Jun 8 — — none high +0.00 0.2 0" 33° / 49°
Sun Jun 7 — — none high +0.00 0.2 1" 33° / 40°
Sat Jun 6 1.0" ~1.5" depth+precip medium +0.00 0.6 1" 32° / 39°
Fri Jun 5 — — none high +0.00 0.7 0" 34° / 42°
Thu Jun 4 — — none high +0.00 0.1 1" 41° / 47°
Wed Jun 3 — — noise filtered high +0.00 — 1" 46° / 58°
Tue Jun 2 — — none high +0.00 — 0" 48° / 68°
Mon Jun 1 — — none high +0.00 — 0" 44° / 64°
Sun May 31 — — none high +0.00 0.1 1" 34° / 58°
Sat May 30 — — none high +0.00 0.1 1" 35° / 46°
Fri May 29 — — noise filtered high +0.00 — 1" 35° / 53°
Thu May 28 — — none high +0.00 — 0" 52° / 73°
Wed May 27 — — — low — — 1" 52° / 54°

Latest Observation

Air Temp 43.5°F
Snow Depth 0.0"
SWE 0.0"
Time 2026-06-10T17:00

Forecasts View archive →

No NWAC forecast data yet.

No UW forecast data yet.

Data Collection

webcam 6 rec 02:10
webcam 5 rec 02:05
webcam 5 rec 02:00
webcam 6 rec 01:55
webcam 5 rec 01:50
webcam 5 rec 01:45
snotel_june_lake 1 rec 01:41
snotel_wells_creek 2 rec 01:41