A live wet-bulb check. Can snowmakers run where you are, and when?
Can they make snow at Keystone?
Base: 40°F4°C air · 73% humidity
Next snowmaking window: tomorrow 5 AM – 6 AM.
Use the left and right arrow keys to step through hours.
- Ideal
- Great
- Marginal
- Too warm
- Night
Hourly table
| Hour | Air | Humidity | Wet-bulb | Snowmaking |
|---|---|---|---|---|
| Sun 10 AM | 40°F4°C | 73% | 35.6°F2.0°C | Too warm |
| Sun 11 AM | 42°F6°C | 62% | 35.9°F2.2°C | Too warm |
| Sun 12 PM | 46°F8°C | 51% | 37.9°F3.3°C | Too warm |
| Sun 1 PM | 46°F8°C | 47% | 37.3°F2.9°C | Too warm |
| Sun 2 PM | 46°F8°C | 45% | 37.0°F2.8°C | Too warm |
| Sun 3 PM | 46°F8°C | 45% | 37.0°F2.8°C | Too warm |
| Sun 4 PM | 44°F7°C | 51% | 36.2°F2.3°C | Too warm |
| Sun 5 PM | 42°F6°C | 57% | 35.2°F1.8°C | Too warm |
| Sun 6 PM | 40°F4°C | 64% | 34.4°F1.3°C | Too warm |
| Sun 7 PM | 36°F2°C | 79% | 32.7°F0.4°C | Too warm |
| Sun 8 PM | 34°F1°C | 85% | 31.6°F−0.2°C | Too warm |
| Sun 9 PM | 33°F1°C | 89% | 31.2°F−0.5°C | Too warm |
| Sun 10 PM | 33°F1°C | 89% | 31.2°F−0.5°C | Too warm |
| Sun 11 PM | 32°F0°C | 92% | 30.6°F−0.8°C | Too warm |
| Mon 12 AM | 32°F0°C | 92% | 30.6°F−0.8°C | Too warm |
| Mon 1 AM | 31°F−1°C | 96% | 30.2°F−1.0°C | Too warm |
| Mon 2 AM | 30°F−1°C | 96% | 29.2°F−1.6°C | Too warm |
| Mon 3 AM | 31°F−1°C | 92% | 29.6°F−1.3°C | Too warm |
| Mon 4 AM | 29°F−2°C | 100% | 28.7°F−1.8°C | Too warm |
| Mon 5 AM | 29°F−2°C | 96% | 28.2°F−2.1°C | Marginal |
| Mon 6 AM | 30°F−1°C | 100% | 29.7°F−1.3°C | Too warm |
| Mon 7 AM | 28°F−2°C | 100% | 27.7°F−2.4°C | Marginal |
| Mon 8 AM | 28°F−2°C | 100% | 27.7°F−2.4°C | Marginal |
| Mon 9 AM | 31°F−1°C | 100% | 30.8°F−0.7°C | Too warm |
| Mon 10 AM | 37°F3°C | 79% | 33.6°F0.9°C | Too warm |
| Mon 11 AM | 40°F4°C | 67% | 34.8°F1.6°C | Too warm |
| Mon 12 PM | 45°F7°C | 51% | 37.0°F2.8°C | Too warm |
| Mon 1 PM | 47°F8°C | 44% | 37.7°F3.2°C | Too warm |
| Mon 2 PM | 48°F9°C | 39% | 37.8°F3.2°C | Too warm |
| Mon 3 PM | 50°F10°C | 33% | 38.4°F3.5°C | Too warm |
| Mon 4 PM | 48°F9°C | 37% | 37.4°F3.0°C | Too warm |
| Mon 5 PM | 46°F8°C | 38% | 36.0°F2.2°C | Too warm |
| Mon 6 PM | 44°F7°C | 41% | 34.8°F1.6°C | Too warm |
| Mon 7 PM | 38°F3°C | 52% | 31.1°F−0.5°C | Too warm |
| Mon 8 PM | 35°F2°C | 59% | 29.2°F−1.5°C | Too warm |
| Mon 9 PM | 33°F1°C | 63% | 27.9°F−2.3°C | Marginal |
| Mon 10 PM | 32°F0°C | 66% | 27.3°F−2.6°C | Marginal |
| Mon 11 PM | 31°F−1°C | 69% | 26.7°F−2.9°C | Marginal |
| Tue 12 AM | 30°F−1°C | 72% | 26.1°F−3.3°C | Marginal |
| Tue 1 AM | 29°F−2°C | 72% | 25.2°F−3.8°C | Marginal |
| Tue 2 AM | 28°F−2°C | 75% | 24.6°F−4.1°C | Great |
| Tue 3 AM | 27°F−3°C | 74% | 23.5°F−4.7°C | Great |
| Tue 4 AM | 26°F−3°C | 74% | 22.6°F−5.2°C | Great |
| Tue 5 AM | 26°F−3°C | 74% | 22.6°F−5.2°C | Great |
| Tue 6 AM | 26°F−3°C | 74% | 22.6°F−5.2°C | Great |
| Tue 7 AM | 28°F−2°C | 71% | 24.1°F−4.4°C | Great |
| Tue 8 AM | 31°F−1°C | 66% | 26.4°F−3.1°C | Marginal |
| Tue 9 AM | 34°F1°C | 61% | 28.6°F−1.9°C | Too warm |
Summit: 34°F1°C air · 78% humidity
Next snowmaking window: tonight 8 PM – 9 PM.
Use the left and right arrow keys to step through hours.
- Ideal
- Great
- Marginal
- Too warm
- Night
Hourly table
| Hour | Air | Humidity | Wet-bulb | Snowmaking |
|---|---|---|---|---|
| Sun 10 AM | 34°F1°C | 78% | 30.6°F−0.8°C | Too warm |
| Sun 11 AM | 37°F3°C | 67% | 32.0°F0.0°C | Too warm |
| Sun 12 PM | 40°F4°C | 55% | 33.2°F0.7°C | Too warm |
| Sun 1 PM | 40°F4°C | 52% | 32.8°F0.5°C | Too warm |
| Sun 2 PM | 40°F4°C | 50% | 32.6°F0.3°C | Too warm |
| Sun 3 PM | 41°F5°C | 48% | 33.2°F0.7°C | Too warm |
| Sun 4 PM | 39°F4°C | 52% | 32.0°F0.0°C | Too warm |
| Sun 5 PM | 37°F3°C | 61% | 31.3°F−0.4°C | Too warm |
| Sun 6 PM | 35°F2°C | 69% | 30.4°F−0.9°C | Too warm |
| Sun 7 PM | 32°F0°C | 82% | 29.2°F−1.5°C | Too warm |
| Sun 8 PM | 30°F−1°C | 88% | 28.1°F−2.2°C | Marginal |
| Sun 9 PM | 31°F−1°C | 88% | 29.1°F−1.6°C | Too warm |
| Sun 10 PM | 29°F−2°C | 96% | 28.2°F−2.1°C | Marginal |
| Sun 11 PM | 30°F−1°C | 92% | 28.6°F−1.9°C | Too warm |
| Mon 12 AM | 30°F−1°C | 88% | 28.1°F−2.2°C | Marginal |
| Mon 1 AM | 30°F−1°C | 88% | 28.1°F−2.2°C | Marginal |
| Mon 2 AM | 29°F−2°C | 92% | 27.6°F−2.4°C | Marginal |
| Mon 3 AM | 28°F−2°C | 96% | 27.2°F−2.7°C | Marginal |
| Mon 4 AM | 27°F−3°C | 100% | 26.7°F−2.9°C | Marginal |
| Mon 5 AM | 26°F−3°C | 100% | 25.7°F−3.5°C | Marginal |
| Mon 6 AM | 27°F−3°C | 100% | 26.7°F−2.9°C | Marginal |
| Mon 7 AM | 26°F−3°C | 100% | 25.7°F−3.5°C | Marginal |
| Mon 8 AM | 26°F−3°C | 96% | 25.2°F−3.8°C | Marginal |
| Mon 9 AM | 27°F−3°C | 100% | 26.7°F−2.9°C | Marginal |
| Mon 10 AM | 31°F−1°C | 85% | 28.7°F−1.8°C | Too warm |
| Mon 11 AM | 33°F1°C | 72% | 28.9°F−1.7°C | Too warm |
| Mon 12 PM | 37°F3°C | 56% | 30.7°F−0.7°C | Too warm |
| Mon 1 PM | 39°F4°C | 48% | 31.5°F−0.3°C | Too warm |
| Mon 2 PM | 41°F5°C | 43% | 32.6°F0.3°C | Too warm |
| Mon 3 PM | 42°F6°C | 38% | 32.8°F0.4°C | Too warm |
| Mon 4 PM | 41°F5°C | 41% | 32.3°F0.2°C | Too warm |
| Mon 5 PM | 38°F3°C | 44% | 30.2°F−1.0°C | Too warm |
| Mon 6 PM | 36°F2°C | 47% | 28.8°F−1.8°C | Too warm |
| Mon 7 PM | 31°F−1°C | 63% | 26.1°F−3.3°C | Marginal |
| Mon 8 PM | 29°F−2°C | 69% | 24.9°F−4.0°C | Marginal |
| Mon 9 PM | 28°F−2°C | 68% | 23.8°F−4.5°C | Great |
| Mon 10 PM | 27°F−3°C | 71% | 23.2°F−4.9°C | Great |
| Mon 11 PM | 26°F−3°C | 74% | 22.6°F−5.2°C | Great |
| Tue 12 AM | 26°F−3°C | 74% | 22.6°F−5.2°C | Great |
| Tue 1 AM | 25°F−4°C | 78% | 22.1°F−5.5°C | Great |
| Tue 2 AM | 25°F−4°C | 74% | 21.6°F−5.8°C | Great |
| Tue 3 AM | 25°F−4°C | 74% | 21.6°F−5.8°C | Great |
| Tue 4 AM | 24°F−4°C | 77% | 21.0°F−6.1°C | Great |
| Tue 5 AM | 24°F−4°C | 74% | 20.7°F−6.3°C | Great |
| Tue 6 AM | 24°F−4°C | 74% | 20.7°F−6.3°C | Great |
| Tue 7 AM | 25°F−4°C | 71% | 21.3°F−5.9°C | Great |
| Tue 8 AM | 27°F−3°C | 68% | 22.9°F−5.1°C | Great |
| Tue 9 AM | 29°F−2°C | 63% | 24.3°F−4.3°C | Great |
Right now at the base
- Wind
- 6 mph9 km/h
- Humidity
- 73%
- Precipitation
- 12% chance
Nearest station KCCU at 9:55 AM: Clear, 32°F0°C, 64% humidity (27°F−3°C wet-bulb).
Snow forecast new snow at the base, NOAA forecast
- Next 24 h
- 0.3″0.8 cm
- Next 48 h
- 0.3″0.8 cm
- Next 72 h
- 0.3″0.8 cm
Use the left and right arrow keys to step through 6-hour periods.
Snowfall table
| Period | New snow |
|---|---|
| Sun 10 AM – 4 PM | 0″0 cm |
| Sun 4 PM – 10 PM | 0.1″0.2 cm |
| Sun 10 PM – 4 AM | 0.2″0.4 cm |
| Mon 4 AM – 10 AM | 0.1″0.2 cm |
| Mon 10 AM – 4 PM | 0″0 cm |
| Mon 4 PM – 10 PM | 0″0 cm |
| Mon 10 PM – 4 AM | 0″0 cm |
| Tue 4 AM – 10 AM | 0″0 cm |
| Tue 10 AM – 4 PM | 0″0 cm |
| Tue 4 PM – 10 PM | 0″0 cm |
| Tue 10 PM – 4 AM | 0″0 cm |
| Wed 4 AM – 10 AM | 0″0 cm |
7-day outlook
- Today 47°F8°C 28°F−2°C Mostly Sunny then Slight Chance Rain And Snow Showers ❄︎ <0.5″<1.3 cm
- Mon 50°F10°C 24°F−4°C Mostly Sunny
- Tue 53°F12°C 24°F−4°C Sunny
- Wed 57°F14°C 26°F−3°C Sunny
- Thu 57°F14°C 28°F−2°C Mostly Sunny
- Fri 55°F13°C 30°F−1°C Partly Sunny then Slight Chance Rain And Snow Showers
- Sat 52°F11°C 27°F−3°C Chance Snow Showers
Forecast for 10 AM · NOAA grid updated 12:46 AM
About this forecast
Keystone is a ski resort in Colorado with a base at 9,280 ft and a summit at 12,408 ft, 3,128 ft of vertical. This page checks NOAA's hourly forecast at the base and the summit every time you load it and works out the wet-bulb temperature, which is what decides whether snow guns can run. Snowmakers can start below 28°F−2°C wet-bulb, and make good snow below 25°F−4°C.
Other ski resorts in Colorado
Base: NOAA's forecast for the base area (forecast grid elevation 9,396 ft). Summit: NOAA's forecast for the top of the mountain (forecast grid elevation 10,735 ft).
Click a pin or anywhere on the map to check it.