Each colour starts at the value shown. Wind colours match across all three units. Dry cells stay neutral. Colours describe the displayed values, not official weather warnings.
Preparing forecast graphs…
Times and values match the detailed forecast. Tap or point at a value for details. Scroll each chart sideways for later days. Rain / precipitation is the total water equivalent per forecast interval, including snow; snowfall is fresh snow per interval, not snow depth.
GFS and ECMWF model comparison. Each model retains its own forecast times and horizon. Precipitation and snowfall amounts cover their own forecast intervals; these can differ between models.
ECMWF · Model run: Next update expected:
Day Time (UTC) Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Thursday, 05/11 06:00 12.9 90 14 8 3B S — — 1015 3114 Clear 0% cloud 09:00 14.4 95 15 8 3B S 0 0 1014 3100 Partly cloudy 49% cloud 12:00 15.4 96 16 9 3B S 0.26 0 1014 3096 Overcast 100% cloud 15:00 17.4 95 16 9 3B S 0.73 0 1012 3092 Overcast 100% cloud 18:00 20.3 77 23 12 4B SW 0.98 0 1011 3080 Overcast 97% cloud 21:00 18.7 89 16 9 3B S 0.61 0 1010 3076 Overcast 89% cloud Friday, 06/11 00:00 17.4 94 15 8 3B S 0.86 0 1011 3081 Cloudy 68% cloud 03:00 16.7 97 14 7 3B SW 2.1 0 1011 3080 Overcast 92% cloud 06:00 16.8 98 12 7 3B SW 0.14 0 1011 3074 Overcast 95% cloud 09:00 15.6 96 6 3 2B NW 0.18 0 1012 3068 Overcast 98% cloud 12:00 13.3 96 3 2 1B N 0.05 0 1013 3070 Cloudy 57% cloud 15:00 18.4 70 0 0 0B NW 0 0 1012 3066 Cloudy 55% cloud 18:00 20.4 57 8 4 2B SW 0 0 1010 3052 Cloudy 51% cloud 21:00 18.6 67 4 2 1B SW 0 0 1010 3043 Cloudy 66% cloud Saturday, 07/11 00:00 14 85 4 2 1B N 0 0 1011 3044 Overcast 99% cloud 03:00 12.5 87 6 3 2B N 0 0 1011 3037 Overcast 100% cloud 06:00 10.9 86 8 4 2B NE 0 0 1010 3027 Clear 5% cloud 09:00 10.5 88 8 4 2B NE 0.01 0 1009 2969 Cloudy 53% cloud 12:00 11.1 93 6 3 2B N 1.8 0 1010 2767 Overcast 100% cloud 15:00 12.6 87 6 4 2B NE 1.0 0 1010 2690 Overcast 100% cloud 18:00 13.6 80 2 1 1B N 0.27 0 1008 2577 Overcast 100% cloud 21:00 11.7 94 7 4 2B NW 0.63 0 1008 2311 Overcast 100% cloud Sunday, 08/11 00:00 6.6 95 15 8 3B NW 5.5 0 1010 1855 Overcast 99% cloud 03:00 5.7 95 12 6 2B NW 1.2 0 1008 1642 Overcast 97% cloud 06:00 6.1 96 11 6 2B W 0.51 0 1007 1483 Overcast 100% cloud 09:00 6.6 96 18 10 3B NW 2.3 0 1008 1708 Overcast 100% cloud 12:00 6.1 93 19 10 3B NW 0.20 0 1011 1580 Overcast 92% cloud 15:00 9.1 76 18 10 3B NW 0 0 1011 1817 Overcast 98% cloud 18:00 10.8 68 18 10 3B W 0.34 0 1009 1818 Overcast 98% cloud 21:00 10.8 59 12 6 2B W 0 0 1007 2060 Clear 0% cloud Monday, 09/11 00:00 7.4 72 12 7 2B SW 0 0 1006 1833 Clear 3% cloud 03:00 7.4 61 12 7 3B W 0 0 1006 1578 Partly cloudy 38% cloud 06:00 7.7 67 11 6 2B W 0.09 0 1006 1413 Overcast 89% cloud 09:00 7 83 16 8 3B W 0.57 0 1006 1323 Cloudy 68% cloud 12:00 6.5 81 19 10 3B W 0.09 0 1007 1225 Cloudy 54% cloud 15:00 8.2 67 21 11 4B W 0.02 0 1008 1149 Cloudy 76% cloud 18:00 7.7 69 22 12 4B NW 0.41 0 1009 1142 Cloudy 74% cloud 21:00 7.5 60 21 11 4B NW 0.09 0 1011 1120 Overcast 92% cloud Tuesday, 10/11 00:00 5.9 66 21 11 4B NW 0.03 0 1013 1010 Partly cloudy 27% cloud 03:00 4.7 75 17 9 3B NW 0 0 1014 1082 Partly cloudy 43% cloud 06:00 4.8 75 16 9 3B NW 0 0 1014 1248 Cloudy 77% cloud 09:00 5.3 78 11 6 2B NW 0 0 1014 2050 Overcast 95% cloud 12:00 5.7 79 8 4 2B W 0 0 1014 2690 Overcast 100% cloud 15:00 8.8 64 13 7 3B W 0 0 1013 2673 Overcast 94% cloud 18:00 11.2 56 12 7 3B SW 0 0 1010 2380 Partly cloudy 33% cloud 21:00 11.3 57 13 7 3B SW 0 0 1008 2234 Overcast 100% cloud Wednesday, 11/11 00:00 9.6 72 14 8 3B W 0.18 0 1010 1906 Partly cloudy 31% cloud 03:00 8.1 88 13 7 3B W 0 0 1011 1727 Partly cloudy 37% cloud 06:00 7.7 88 16 9 3B W 0.13 0 1011 1852 Partly cloudy 37% cloud |
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Forecast table times: UTC.
Coordinates: 42.1840173°N, -73.3200313°E · Requested elevation: 252 m. Model terrain: 374 m. Terrain and 1000/925/850/700 hPa profiles are used for height estimates.
Outside the available profile, temperature uses an estimated 5.5°C/km height correction; wind retains the nearest available model-level value. Humidity is estimated with adjusted pressure and temperature.
These are altitude estimates, not a simulation of local mountain terrain. Precipitation, cloud and sea-level pressure use horizontal interpolation only.
Precipitation includes rain and snow water equivalent: preceding 3 hours through day 6, then 6 hours (see cell tooltip). Snow (cm) estimates fresh snowfall from precipitation and temperature using the GFS conversion; it is not snow depth on the ground. Freezing (m) uses additional 600/500 hPa temperatures when available and estimates the lowest resolved 0°C crossing above sea level. When all sampled levels are warm, the upper profile limit is shown (see tooltip). < marks an entirely cold sampled profile and its lower height limit. No extrapolation is used.

Ski Butternut is a downhill ski area in Massachusetts, United States. Mapped terrain includes beginner, easy, intermediate, advanced routes. Its mapped lift network extends from approximately 252 to 539 metres above sea level.
Data: OpenSkiData / OpenSkiMap, OpenStreetMap contributors (ODbL), Skimap.org, Who's On First, Mapterhorn.
Preparing forecast graphs…
Times and values match the detailed forecast. Tap or point at a value for details. Scroll each chart sideways for later days. Rain / precipitation is the total water equivalent per forecast interval, including snow; snowfall is fresh snow per interval, not snow depth.
GFS and ECMWF model comparison. Each model retains its own forecast times and horizon. Precipitation and snowfall amounts cover their own forecast intervals; these can differ between models.
ECMWF · Model run: Next update expected:
Day Time (UTC) Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Thursday, 05/11 06:00 12.9 91 14 8 3B S — — 1015 3114 Clear 0% cloud 09:00 14.3 95 15 8 3B S 0 0 1014 3100 Partly cloudy 49% cloud 12:00 15.3 97 16 9 3B S 0.26 0 1014 3096 Overcast 100% cloud 15:00 17.4 96 16 9 3B S 0.74 0 1012 3092 Overcast 100% cloud 18:00 20.3 77 23 12 4B SW 0.98 0 1011 3080 Overcast 97% cloud 21:00 18.7 89 16 9 3B S 0.61 0 1010 3076 Overcast 89% cloud Friday, 06/11 00:00 17.4 94 15 8 3B S 0.85 0 1011 3081 Cloudy 68% cloud 03:00 16.6 97 14 7 3B SW 2.1 0 1011 3080 Overcast 92% cloud 06:00 16.8 98 12 7 3B SW 0.14 0 1011 3074 Overcast 95% cloud 09:00 15.5 96 6 3 1B NW 0.18 0 1012 3068 Overcast 98% cloud 12:00 13.3 96 3 2 1B N 0.05 0 1013 3071 Cloudy 58% cloud 15:00 18.3 70 0 0 0B NW 0 0 1012 3066 Cloudy 55% cloud 18:00 20.4 57 8 4 2B SW 0 0 1010 3052 Cloudy 51% cloud 21:00 18.5 67 4 2 1B SW 0 0 1010 3043 Cloudy 66% cloud Saturday, 07/11 00:00 14 85 4 2 1B N 0 0 1011 3044 Overcast 99% cloud 03:00 12.5 87 6 3 2B N 0 0 1011 3037 Overcast 100% cloud 06:00 10.9 87 8 4 2B NE 0 0 1010 3027 Clear 5% cloud 09:00 10.5 88 8 4 2B NE 0.01 0 1009 2969 Cloudy 53% cloud 12:00 11.1 93 6 3 2B N 1.7 0 1010 2767 Overcast 100% cloud 15:00 12.5 87 7 4 2B NE 1.0 0 1010 2690 Overcast 100% cloud 18:00 13.6 80 2 1 1B N 0.27 0 1008 2578 Overcast 100% cloud 21:00 11.7 94 7 4 2B NW 0.63 0 1008 2312 Overcast 100% cloud Sunday, 08/11 00:00 6.6 95 15 8 3B NW 5.5 0 1010 1855 Overcast 99% cloud 03:00 5.6 95 12 6 2B NW 1.2 0 1008 1642 Overcast 97% cloud 06:00 6.1 96 11 6 2B W 0.51 0 1007 1482 Overcast 100% cloud 09:00 6.6 96 18 10 3B NW 2.3 0 1008 1708 Overcast 100% cloud 12:00 6 93 19 10 3B NW 0.20 0 1011 1581 Overcast 92% cloud 15:00 9 76 18 10 3B NW 0 0 1011 1818 Overcast 98% cloud 18:00 10.8 68 18 10 3B W 0.34 0 1009 1820 Overcast 98% cloud 21:00 10.8 59 12 6 2B W 0 0 1007 2061 Clear 0% cloud Monday, 09/11 00:00 7.4 72 12 7 2B SW 0 0 1006 1833 Clear 3% cloud 03:00 7.4 61 12 7 3B W 0 0 1006 1579 Partly cloudy 37% cloud 06:00 7.6 67 11 6 2B W 0.09 0 1006 1413 Overcast 89% cloud 09:00 7 84 16 8 3B W 0.57 0 1006 1323 Cloudy 68% cloud 12:00 6.5 81 19 10 3B W 0.09 0 1007 1226 Cloudy 54% cloud 15:00 8.1 67 21 11 4B W 0.02 0 1008 1150 Cloudy 76% cloud 18:00 7.7 69 22 12 4B NW 0.41 0 1009 1143 Cloudy 74% cloud 21:00 7.5 60 21 11 4B NW 0.09 0 1011 1120 Overcast 92% cloud Tuesday, 10/11 00:00 5.8 66 21 11 4B NW 0.02 0 1013 1010 Partly cloudy 27% cloud 03:00 4.7 75 17 9 3B NW 0 0 1014 1084 Partly cloudy 43% cloud 06:00 4.8 75 16 9 3B NW 0 0 1014 1251 Cloudy 77% cloud 09:00 5.2 78 11 6 2B NW 0 0 1014 2059 Overcast 95% cloud 12:00 5.7 80 8 4 2B W 0 0 1014 2690 Overcast 100% cloud 15:00 8.8 65 13 7 3B W 0 0 1013 2674 Overcast 94% cloud 18:00 11.2 56 12 7 3B SW 0 0 1010 2381 Partly cloudy 33% cloud 21:00 11.3 57 13 7 3B SW 0 0 1008 2235 Overcast 100% cloud Wednesday, 11/11 00:00 9.6 72 14 8 3B W 0.18 0 1010 1907 Partly cloudy 31% cloud 03:00 8.1 88 13 7 3B W 0 0 1011 1729 Partly cloudy 37% cloud 06:00 7.6 88 16 9 3B W 0.13 0 1011 1853 Partly cloudy 37% cloud |
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Forecast table times: UTC.
Coordinates: 42.1827411°N, -73.319428°E · Requested elevation: 257 m. Model terrain: 374 m. Terrain and 1000/925/850/700 hPa profiles are used for height estimates.
Outside the available profile, temperature uses an estimated 5.5°C/km height correction; wind retains the nearest available model-level value. Humidity is estimated with adjusted pressure and temperature.
These are altitude estimates, not a simulation of local mountain terrain. Precipitation, cloud and sea-level pressure use horizontal interpolation only.
Precipitation includes rain and snow water equivalent: preceding 3 hours through day 6, then 6 hours (see cell tooltip). Snow (cm) estimates fresh snowfall from precipitation and temperature using the GFS conversion; it is not snow depth on the ground. Freezing (m) uses additional 600/500 hPa temperatures when available and estimates the lowest resolved 0°C crossing above sea level. When all sampled levels are warm, the upper profile limit is shown (see tooltip). < marks an entirely cold sampled profile and its lower height limit. No extrapolation is used.
Preparing forecast graphs…
Times and values match the detailed forecast. Tap or point at a value for details. Scroll each chart sideways for later days. Rain / precipitation is the total water equivalent per forecast interval, including snow; snowfall is fresh snow per interval, not snow depth.
GFS and ECMWF model comparison. Each model retains its own forecast times and horizon. Precipitation and snowfall amounts cover their own forecast intervals; these can differ between models.
ECMWF · Model run: Next update expected:
Day Time (UTC) Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Thursday, 05/11 06:00 13.4 80 30 16 5B SW — — 1015 3114 Clear 0% cloud 09:00 13.7 96 33 18 5B SW 0 0 1014 3100 Partly cloudy 49% cloud 12:00 14.5 100 33 18 5B SW 0.25 0 1014 3097 Overcast 100% cloud 15:00 15.9 99 34 18 5B SW 0.77 0 1013 3093 Overcast 100% cloud 18:00 18 84 34 18 5B SW 1.0 0 1011 3080 Overcast 97% cloud 21:00 17.3 91 30 16 5B S 0.61 0 1010 3076 Overcast 90% cloud Friday, 06/11 00:00 16.3 96 31 16 5B SW 0.82 0 1011 3081 Cloudy 68% cloud 03:00 15.6 99 29 15 4B SW 2.3 0 1011 3080 Overcast 93% cloud 06:00 15.6 100 24 13 4B SW 0.17 0 1011 3075 Overcast 95% cloud 09:00 14.4 97 11 6 2B NW 0.17 0 1012 3068 Overcast 98% cloud 12:00 12.8 95 4 2 1B NW 0.05 0 1013 3071 Cloudy 60% cloud 15:00 15.6 79 1 0 0B S 0 0 1012 3066 Cloudy 57% cloud 18:00 17.7 64 9 5 2B SW 0 0 1011 3052 Cloudy 53% cloud 21:00 16.7 70 6 3 2B SW 0 0 1010 3044 Cloudy 67% cloud Saturday, 07/11 00:00 13.9 81 5 3 1B N 0 0 1011 3044 Overcast 99% cloud 03:00 12.8 81 11 6 2B N 0 0 1011 3037 Overcast 100% cloud 06:00 11.5 86 18 10 3B NE 0 0 1010 3027 Clear 4% cloud 09:00 10.5 92 21 11 4B NE 0.01 0 1009 2973 Cloudy 51% cloud 12:00 10.1 97 15 8 3B NE 1.7 0 1010 2768 Overcast 100% cloud 15:00 10.5 94 11 6 2B NE 1.00 0 1010 2691 Overcast 100% cloud 18:00 11.3 89 1 1 1B NE 0.25 0 1008 2581 Overcast 100% cloud 21:00 10 97 8 5 2B NW 0.64 0 1008 2313 Overcast 100% cloud Sunday, 08/11 00:00 4.6 96 30 16 5B NW 5.4 0 1010 1862 Overcast 99% cloud 03:00 3.8 99 24 13 4B NW 1.1 0 1008 1640 Overcast 97% cloud 06:00 4.4 99 22 12 4B NW 0.51 0 1007 1479 Overcast 100% cloud 09:00 4.7 100 31 17 5B NW 2.2 0 1008 1709 Overcast 100% cloud 12:00 4.3 96 36 19 5B NW 0.20 0 1011 1584 Overcast 91% cloud 15:00 6.5 86 27 14 4B NW 0 0 1011 1822 Overcast 97% cloud 18:00 8.3 76 26 14 4B W 0.34 0 1009 1833 Overcast 98% cloud 21:00 8.9 63 22 12 4B W 0 0 1007 2070 Clear 0% cloud Monday, 09/11 00:00 7.5 64 29 16 5B SW 0 0 1006 1836 Clear 3% cloud 03:00 6.9 57 27 15 4B W 0 0 1006 1586 Partly cloudy 36% cloud 06:00 6.3 71 23 13 4B W 0.08 0 1006 1414 Overcast 89% cloud 09:00 5.7 85 29 15 4B W 0.54 0 1006 1326 Cloudy 67% cloud 12:00 4.7 86 34 18 5B W 0.08 0 1007 1227 Cloudy 53% cloud 15:00 5.5 75 30 16 5B W 0.03 0 1008 1152 Cloudy 75% cloud 18:00 5.4 74 33 18 5B NW 0.41 0 1009 1144 Cloudy 75% cloud 21:00 5.4 66 33 18 5B NW 0.08 0 1011 1122 Overcast 92% cloud Tuesday, 10/11 00:00 3.9 72 35 19 5B NW 0.02 0 1013 1012 Partly cloudy 26% cloud 03:00 3.1 80 33 18 5B NW 0 0 1014 1093 Partly cloudy 42% cloud 06:00 3.3 80 32 17 5B NW 0 0 1014 1275 Cloudy 76% cloud 09:00 3.5 84 23 13 4B NW 0 0 1014 2129 Overcast 95% cloud 12:00 3.9 88 17 9 3B W 0 0 1014 2696 Overcast 100% cloud 15:00 6.1 74 17 9 3B W 0 0 1013 2681 Overcast 94% cloud 18:00 8.4 64 17 9 3B SW 0 0 1010 2386 Partly cloudy 34% cloud 21:00 9.6 59 26 14 4B SW 0 0 1008 2243 Overcast 100% cloud Wednesday, 11/11 00:00 8.7 72 29 16 5B W 0.17 0 1010 1912 Partly cloudy 30% cloud 03:00 7 88 25 13 4B W 0 0 1011 1737 Partly cloudy 35% cloud 06:00 6.3 90 30 16 5B W 0.12 0 1011 1864 Partly cloudy 37% cloud |
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Forecast table times: UTC.
Coordinates: 42.1726484°N, -73.3146733°E · Requested elevation: 539 m. Model terrain: 374 m. Terrain and 1000/925/850/700 hPa profiles are used for height estimates.
These are altitude estimates, not a simulation of local mountain terrain. Precipitation, cloud and sea-level pressure use horizontal interpolation only.
Precipitation includes rain and snow water equivalent: preceding 3 hours through day 6, then 6 hours (see cell tooltip). Snow (cm) estimates fresh snowfall from precipitation and temperature using the GFS conversion; it is not snow depth on the ground. Freezing (m) uses additional 600/500 hPa temperatures when available and estimates the lowest resolved 0°C crossing above sea level. When all sampled levels are warm, the upper profile limit is shown (see tooltip). < marks an entirely cold sampled profile and its lower height limit. No extrapolation is used.