New Fork River near Big Piney
17 mi- Level
- 2.8 ft
- Flow
- 404 cfs
Forecast peak 2.8 ft Sat 4 PM
Reading from Sat 2 PM · NWS gauge page
Appearance
Observed 2:35 PM MDT at KPNA
Overcast and 43°6°, freeze watch tonight, low 23°−5°.
Today: low 22°−6° (likely 22°−6° to 33°1°), high 49°9° (likely 44°7° to 49°9°).
Now 43°6°
Cloudy · Feels like 39°4°
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 3p | Partly sunny | 47°8° (likely 43°6° to 48°9°) | 47°8° | 0% | 3 mph5 km/h from SSW, gusts 4 mph6 km/h | 51% | 36% | 3 |
| Sat 4p | Mostly sunny | 49°9° (likely 44°7° to 49°9°) | 49°9° | 0% | 2 mph3 km/h from SSW, gusts 4 mph6 km/h | 45% | 25% | 2 |
| Sat 5p | Partly sunny | 48°9° (likely 44°7° to 48°9°) | 48°9° | 0% | 2 mph3 km/h from SW, gusts 4 mph6 km/h | 44% | 62% | 1 |
| Sat 6p | Partly cloudy | 47°8° (likely 41°5° to 47°8°) | 47°8° | 0% | 2 mph3 km/h from SW, gusts 3 mph5 km/h | 47% | 54% | 1 |
| Sat 7p | Partly cloudy | 45°7° (likely 38°3° to 45°7°) | 44°7° | 0% | 3 mph5 km/h from W, gusts 3 mph5 km/h | 56% | 54% | 0 |
| Sat 8p | Clear | 39°4° (likely 36°2° to 40°4°) | 37°3° | 0% | 3 mph5 km/h from SE, gusts 4 mph6 km/h | 68% | 16% | 0 |
| Sat 9p | Clear | 37°3° (likely 34°1° to 37°3°) | 37°3° | 0% | 2 mph3 km/h from NW, gusts 5 mph8 km/h | 74% | 14% | 0 |
| Sat 10p | Clear | 35°2° (likely 32°0° to 35°2°) | 31°−1° | 0% | 5 mph8 km/h from NNW, gusts 2 mph4 km/h | 77% | 28% | 0 |
| Sat 11p | Clear | 33°1° (likely 32°0° to 33°1°) | 30°−1° | 0% | 3 mph5 km/h from NW, gusts 4 mph7 km/h | 83% | 26% | 0 |
| Sun 12a | Cloudy | 31°−1° (likely 31°−1° to 33°1°) | 26°−3° | 0% | 5 mph8 km/h from NW, gusts 3 mph6 km/h | 87% | 65% | 0 |
| Sun 1a | Cloudy | 31°−1° (likely 30°−1° to 33°1°) | 26°−3° | 0% | 5 mph8 km/h from NW, gusts 5 mph7 km/h | 87% | 69% | 0 |
| Sun 2a | Partly cloudy | 30°−1° (likely 30°−1° to 32°0°) | 26°−3° | 0% | 3 mph5 km/h from NW, gusts 7 mph11 km/h | 89% | 65% | 0 |
| Sun 3a | Cloudy | 29°−2° (likely 29°−2° to 32°0°) | 25°−4° | 0% | 3 mph5 km/h from WNW, gusts 6 mph10 km/h | 90% | 80% | 0 |
| Sun 4a | Fog | 27°−3° (likely 27°−3° to 33°1°) | 23°−5° | 0% | 3 mph5 km/h from WNW, gusts 4 mph6 km/h | 93% | 71% | 0 |
| Sun 5a | Cloudy | 27°−3° (likely 27°−3° to 33°1°) | 23°−5° | 0% | 3 mph5 km/h from W, gusts 3 mph5 km/h | 96% | 80% | 0 |
| Sun 6a | Cloudy | 25°−4° (likely 25°−4° to 32°0°) | 25°−4° | 5% | 2 mph3 km/h from WNW, gusts 3 mph5 km/h | 100% | 76% | 0 |
| Sun 7a | Cloudy | 23°−5° (likely 23°−5° to 33°1°) | 23°−5° | 5% | 2 mph3 km/h from NW, gusts 2 mph4 km/h | 100% | 85% | 0 |
| Sun 8a | Cloudy | 25°−4° (likely 25°−4° to 34°1°) | 25°−4° | 5% | 1 mph2 km/h from NNW, gusts 4 mph6 km/h | 100% | 97% | 0 |
| Sun 9a | Cloudy | 28°−2° (likely 28°−2° to 36°2°) | 28°−2° | 10% | 2 mph3 km/h from ESE, gusts 4 mph6 km/h | 100% | 89% | 0 |
| Sun 10a | Cloudy | 34°1° (likely 34°1° to 39°4°) | 34°1° | 10% | 2 mph3 km/h from SSW, gusts 4 mph7 km/h | 91% | 89% | 1 |
| Sun 11a | Snow | 40°4° (likely 39°4° to 43°6°) | 40°4° | 20% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 75% | 91% | 2 |
| Sun 12p | Showers | 43°6° (likely 42°6° to 46°8°) | 41°5° | 40% | 3 mph5 km/h from S, gusts 7 mph11 km/h | 64% | 91% | 2 |
| Sun 1p | Cloudy | 45°7° (likely 42°6° to 49°9°) | 43°6° | 40% | 5 mph8 km/h from SW, gusts 7 mph11 km/h | 62% | 97% | 2 |
| Sun 2p | Cloudy | 46°8° (likely 43°6° to 49°9°) | 44°7° | 30% | 5 mph8 km/h from SW, gusts 7 mph12 km/h | 59% | 94% | 1 |
| Sun 3p | Cloudy | 47°8° (likely 43°6° to 50°10°) | 45°7° | 20% | 5 mph8 km/h from SW, gusts 7 mph11 km/h | 59% | 88% | 2 |
| Sun 4p | Cloudy | 47°8° (likely 43°6° to 50°10°) | 45°7° | 20% | 5 mph8 km/h from SSW, gusts 7 mph12 km/h | 57% | 86% | 2 |
| Sun 5p | Cloudy | 47°8° (likely 43°6° to 48°9°) | 44°7° | 20% | 6 mph10 km/h from S, gusts 8 mph13 km/h | 57% | 88% | 2 |
| Sun 6p | Cloudy | 48°9° (likely 42°6° to 48°9°) | 45°7° | 10% | 6 mph10 km/h from SSE, gusts 6 mph9 km/h | 59% | 67% | 0 |
| Sun 7p | Cloudy | 45°7° (likely 38°3° to 45°7°) | 43°6° | 10% | 5 mph8 km/h from SSE, gusts 4 mph7 km/h | 67% | 60% | 0 |
| Sun 8p | Mostly cloudy | 43°6° (likely 35°2° to 43°6°) | 43°6° | 5% | 2 mph3 km/h from SSE, gusts 4 mph6 km/h | 77% | 72% | 0 |
| Sun 9p | Partly cloudy | 39°4° (likely 34°1° to 39°4°) | 37°3° | 5% | 3 mph5 km/h from W, gusts 3 mph5 km/h | 80% | 74% | 0 |
| Sun 10p | Cloudy | 38°3° (likely 33°1° to 38°3°) | 38°3° | 5% | 2 mph3 km/h from W, gusts 4 mph6 km/h | 82% | 94% | 0 |
| Sun 11p | Cloudy | 36°2° (likely 34°1° to 38°3°) | 36°2° | 10% | 1 mph2 km/h from W, gusts 3 mph4 km/h | 88% | 94% | 0 |
| Mon 12a | Cloudy | 35°2° (likely 34°1° to 38°3°) | 35°2° | 20% | 2 mph3 km/h from W, gusts 5 mph8 km/h | 91% | 97% | 0 |
| Mon 1a | Cloudy | 35°2° (likely 34°1° to 37°3°) | 35°2° | 20% | 2 mph3 km/h from W, gusts 2 mph4 km/h | 93% | 86% | 0 |
| Mon 2a | Cloudy | 33°1° (likely 33°1° to 37°3°) | 33°1° | 10% | 2 mph3 km/h from WSW, gusts 3 mph6 km/h | 97% | 82% | 0 |
| Mon 3a | Cloudy | 31°−1° (likely 31°−1° to 37°3°) | 31°−1° | 10% | 2 mph3 km/h from SW, gusts 2 mph3 km/h | 98% | 97% | 0 |
| Mon 4a | Cloudy | 31°−1° (likely 31°−1° to 37°3°) | 31°−1° | 10% | 2 mph3 km/h from SW, gusts 2 mph3 km/h | 100% | 97% | 0 |
| Mon 5a | Cloudy | 30°−1° (likely 30°−1° to 36°2°) | 30°−1° | 5% | 1 mph2 km/h from W, gusts 2 mph4 km/h | 100% | 98% | 0 |
| Mon 6a | Cloudy | 27°−3° (likely 27°−3° to 36°2°) | 27°−3° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 100% | 96% | 0 |
| Mon 7a | Mostly cloudy | 29°−2° (likely 29°−2° to 36°2°) | 29°−2° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 100% | 80% | 0 |
| Mon 8a | Partly sunny | 29°−2° (likely 29°−2° to 36°2°) | 29°−2° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 100% | 75% | 0 |
| Mon 9a | Mostly cloudy | 30°−1° (likely 30°−1° to 36°2°) | 30°−1° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 100% | 84% | 0 |
| Mon 10a | Cloudy | 34°1° (likely 34°1° to 40°4°) | 34°1° | 0% | 1 mph2 km/h from WSW, gusts 3 mph4 km/h | 91% | 74% | 1 |
| Mon 11a | Partly sunny | 39°4° (likely 39°4° to 44°7°) | 39°4° | 0% | 1 mph2 km/h from SW, gusts 3 mph5 km/h | 79% | 51% | 3 |
| Mon 12p | Partly sunny | 44°7° (likely 43°6° to 47°8°) | 44°7° | 0% | 2 mph3 km/h from SSW, gusts 5 mph8 km/h | 67% | 42% | 4 |
| Mon 1p | Partly sunny | 46°8° (likely 44°7° to 48°9°) | 46°8° | 0% | 2 mph3 km/h from SSW, gusts 6 mph9 km/h | 60% | 45% | 4 |
| Mon 2p | Partly sunny | 48°9° (likely 45°7° to 50°10°) | 48°9° | 0% | 2 mph3 km/h from S, gusts 7 mph11 km/h | 54% | 35% | 4 |
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Today: Mostly sunny, with a high near 49. South southwest wind around 3 mph.
Tonight: Patchy fog after 4am. Partly cloudy. Low around 22, with temperatures rising to around 27 overnight. West northwest wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
40% chance
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Day: Widespread fog before 11am, then scattered rain and snow showers. Partly sunny, with a high near 49. Southwest wind 1 to 6 mph. Chance of precipitation is 40%.
Night: Isolated rain and snow showers between midnight and 2am. Mostly cloudy, with a low around 26. West southwest wind 1 to 6 mph. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
20% chance
Overnight
midnight–6 AM
70% chance · 0.2 in0.6 cm
Official NWS forecast
Day: Partly sunny, with a high near 50. Southwest wind 0 to 3 mph.
Night: A chance of rain and snow showers after midnight. Partly cloudy, with a low around 22. Southeast wind 3 to 7 mph. Chance of precipitation is 50%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
70% chance
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow showers. Partly sunny, with a high near 44. West wind 7 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Night: Partly cloudy, with a low around 18.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 48.
Night: Partly cloudy, with a low around 23.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
30% chance
Overnight
midnight–6 AM
30% chance · 0.04 in1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 52.
Night: A slight chance of rain showers between midnight and 3am, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 27.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
40% chance · 0.01 in0.3 mm
Afternoon
noon–6 PM
50% chance · 0.03 in0.9 mm
Evening
6 PM–midnight
50% chance · 0.05 in1.2 mm
Overnight
midnight–6 AM
40% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and snow showers. Mostly cloudy, with a high near 51.
Night: A chance of rain showers before 9pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 25. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
30% chance · 0.01 in0.3 mm
Afternoon
noon–6 PM
30% chance · 0.06 in1.5 mm
Evening
6 PM–midnight
30% chance · 0.02 in0.5 mm
Overnight
midnight–6 AM
30% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
30% chance
Afternoon
noon–6 PM
20% chance
Evening
6 PM–midnight
20% chance
Overnight
midnight–6 AM
30% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
20% chance
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
20% chance · 0.02 in0.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Dry, high 49°, low 22°.
36% chance of snow, high 49°, low 26°.
Dry, high 50°, low 22°.
Highs 38–52°; chance of precipitation on Tuesday.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (RIW) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 2.8 ft Sat 4 PM
Reading from Sat 2 PM · NWS gauge page
Forecast peak 3.2 ft Sat 3 PM
Reading from Sat 1:45 PM · NWS gauge page
Reading from Sat 2 PM · NWS gauge page
Reading from Sat 2 PM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
Tonight’s low: 23°−5°
Overnight low near 23°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.
About 74% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at. About 20 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 29°F).
No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.
Today’s expected high is 2°1° colder than typical.
On average 4°2° warmer than normal (daily mean temperature).
Boulder weather by month: normals, records, snow and freeze dates
Sunrise 7:43 AM, sunset 6:22 PM.
Mostly clear 8–10 PM, but the moon is 99% lit and up.
Waxing gibbous
98% lit · growing