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 Local time Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Wednesday, 04/11 01:00 11.1 75 9 5 2B S — — 1022 3162 Overcast 80% cloud 04:00 10.7 83 9 5 2B S 0 0 1021 3157 Cloudy 58% cloud 07:00 9.9 88 6 3 2B S 0 0 1021 3157 Clear 0% cloud 10:00 17.5 63 11 6 2B SW 0 0 1020 3152 Clear 0% cloud 13:00 20.8 53 16 8 3B SW 0 0 1018 3141 Clear 0% cloud 16:00 18.8 62 12 7 3B SW 0 0 1017 3137 Clear 0% cloud 19:00 14.6 74 12 7 3B S 0 0 1017 3135 Clear 0% cloud 22:00 13 82 13 7 3B S 0 0 1017 3127 Clear 2% cloud Thursday, 05/11 01:00 12.3 89 13 7 3B S 0 0 1016 3115 Partly cloudy 33% cloud 04:00 12.9 97 15 8 3B S 0 0 1015 3102 Overcast 98% cloud 07:00 14.2 96 14 8 3B S 0 0 1014 3097 Overcast 100% cloud 10:00 16.2 96 17 9 3B S 2.0 0 1013 3090 Overcast 100% cloud 13:00 17 96 18 9 3B S 3.7 0 1011 3074 Overcast 99% cloud 16:00 17.9 89 17 9 3B S 0.44 0 1010 3071 Overcast 98% cloud 19:00 16.8 94 14 7 3B S 0.48 0 1011 3077 Overcast 83% cloud 22:00 16.5 97 16 8 3B SW 2.0 0 1011 3075 Overcast 100% cloud Friday, 06/11 01:00 16.5 97 10 6 2B SW 0.18 0 1011 3065 Overcast 100% cloud 04:00 15 96 5 3 1B N 1.0 0 1012 3065 Overcast 99% cloud 07:00 13.5 96 2 1 1B E 0.01 0 1013 3068 Overcast 94% cloud 10:00 18.6 72 3 2 1B SW 0.02 0 1013 3069 Cloudy 67% cloud 13:00 20.6 56 7 4 2B SW 0 0 1011 3058 Overcast 85% cloud 16:00 17.8 72 4 2 1B W 0 0 1011 3053 Overcast 95% cloud 19:00 13.9 84 4 2 1B N 0 0 1012 3053 Overcast 100% cloud 22:00 12.1 90 8 4 2B N 0 0 1011 3046 Overcast 100% cloud Saturday, 07/11 01:00 11.8 82 7 4 2B NE 0 0 1010 2911 Overcast 100% cloud 04:00 11.8 84 10 5 2B NE 0 0 1010 2886 Cloudy 73% cloud 07:00 11.7 88 11 6 2B NE 0 0 1010 2850 Partly cloudy 35% cloud 10:00 15.6 69 12 6 2B E 0 0 1009 2783 Cloudy 55% cloud 13:00 14.3 76 8 4 2B E 0.08 0 1008 2650 Overcast 100% cloud 16:00 12.6 89 3 2 1B NE 1.8 0 1008 2479 Overcast 100% cloud 19:00 10.4 96 9 5 2B NW 3.8 0 1008 2264 Overcast 100% cloud 22:00 7.8 96 14 8 3B NW 7.9 0 1008 1955 Overcast 100% cloud Sunday, 08/11 01:00 7.4 97 14 8 3B NW 3.8 0 1007 1811 Overcast 100% cloud 04:00 6.3 97 15 8 3B NW 5.2 0 1007 1594 Overcast 100% cloud 07:00 5.7 96 20 11 3B NW 2.5 0 1009 1811 Overcast 99% cloud 10:00 8 77 24 13 4B NW 0.09 0 1010 1749 Cloudy 69% cloud 13:00 10.1 68 22 12 4B NW 0.15 0 1008 1395 Overcast 100% cloud 16:00 9.5 60 15 8 3B W 0.06 0 1008 1349 Partly cloudy 30% cloud 19:00 6 69 11 6 2B W 0 0 1007 1706 Clear 2% cloud 22:00 4.9 75 8 5 2B W 0 0 1006 1570 Cloudy 79% cloud Monday, 09/11 01:00 6.1 70 12 6 2B W 0 0 1005 1381 Cloudy 64% cloud 04:00 6.2 76 14 8 3B SW 0.15 0 1004 1321 Partly cloudy 37% cloud 07:00 5.6 92 18 10 3B W 0.98 0 1006 1134 Overcast 91% cloud 10:00 7.4 73 27 15 4B NW 0.18 0 1007 1120 Overcast 99% cloud 13:00 8.2 74 24 13 4B NW 0.58 0 1008 1241 Cloudy 70% cloud 16:00 7.4 63 26 14 4B NW 0.18 0 1011 1110 Overcast 96% cloud 19:00 5.3 73 21 11 4B NW 0 0 1013 992 Cloudy 75% cloud 22:00 4.2 73 15 8 3B NW 0 0 1014 965 Overcast 98% cloud Tuesday, 10/11 01:00 5.2 72 18 10 3B NW 0 0 1015 927 Overcast 95% cloud |
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Forecast table times: America/New_York.
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 Local time Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Wednesday, 04/11 01:00 11 75 9 5 2B S — — 1022 3162 Overcast 80% cloud 04:00 10.6 83 9 5 2B S 0 0 1021 3157 Cloudy 58% cloud 07:00 9.9 89 6 3 2B S 0 0 1021 3157 Clear 0% cloud 10:00 17.5 63 11 6 2B SW 0 0 1020 3152 Clear 0% cloud 13:00 20.8 53 16 8 3B SW 0 0 1018 3141 Clear 0% cloud 16:00 18.7 62 12 7 3B SW 0 0 1017 3137 Clear 0% cloud 19:00 14.5 74 12 7 3B S 0 0 1017 3135 Clear 0% cloud 22:00 13 82 13 7 3B S 0 0 1017 3127 Clear 2% cloud Thursday, 05/11 01:00 12.3 89 13 7 3B S 0 0 1016 3115 Partly cloudy 33% cloud 04:00 12.9 97 15 8 3B S 0 0 1015 3102 Overcast 98% cloud 07:00 14.2 96 14 8 3B S 0 0 1014 3097 Overcast 100% cloud 10:00 16.2 96 17 9 3B S 2.0 0 1013 3090 Overcast 100% cloud 13:00 17 96 18 9 3B S 3.7 0 1011 3074 Overcast 99% cloud 16:00 17.9 89 17 9 3B S 0.44 0 1010 3071 Overcast 98% cloud 19:00 16.8 94 14 7 3B S 0.48 0 1011 3077 Overcast 83% cloud 22:00 16.4 97 16 8 3B SW 2.0 0 1011 3075 Overcast 100% cloud Friday, 06/11 01:00 16.4 97 10 6 2B SW 0.18 0 1011 3065 Overcast 100% cloud 04:00 15 97 5 3 1B N 1.0 0 1012 3065 Overcast 99% cloud 07:00 13.5 96 2 1 1B E 0.01 0 1013 3068 Overcast 94% cloud 10:00 18.6 72 3 2 1B SW 0.02 0 1013 3069 Cloudy 67% cloud 13:00 20.6 56 7 4 2B SW 0 0 1011 3058 Overcast 85% cloud 16:00 17.8 72 4 2 1B W 0 0 1011 3053 Overcast 96% cloud 19:00 13.8 85 4 2 1B N 0 0 1012 3053 Overcast 100% cloud 22:00 12 90 8 4 2B N 0 0 1011 3046 Overcast 100% cloud Saturday, 07/11 01:00 11.8 82 7 4 2B NE 0 0 1010 2911 Overcast 100% cloud 04:00 11.8 85 10 5 2B NE 0 0 1010 2886 Cloudy 73% cloud 07:00 11.6 88 11 6 2B NE 0 0 1010 2850 Partly cloudy 35% cloud 10:00 15.5 69 12 7 2B E 0 0 1009 2783 Cloudy 55% cloud 13:00 14.3 76 8 4 2B E 0.08 0 1008 2650 Overcast 100% cloud 16:00 12.6 89 3 2 1B NE 1.8 0 1008 2479 Overcast 100% cloud 19:00 10.3 96 9 5 2B NW 3.9 0 1008 2265 Overcast 100% cloud 22:00 7.8 96 14 8 3B NW 7.9 0 1008 1955 Overcast 100% cloud Sunday, 08/11 01:00 7.4 97 14 8 3B NW 3.7 0 1007 1810 Overcast 100% cloud 04:00 6.3 97 15 8 3B NW 5.2 0 1007 1594 Overcast 100% cloud 07:00 5.7 96 20 11 3B NW 2.5 0 1009 1812 Overcast 99% cloud 10:00 8 77 24 13 4B NW 0.09 0 1010 1750 Cloudy 68% cloud 13:00 10.1 68 22 12 4B NW 0.15 0 1008 1395 Overcast 100% cloud 16:00 9.5 60 15 8 3B W 0.06 0 1008 1349 Partly cloudy 30% cloud 19:00 6 69 11 6 2B W 0 0 1007 1707 Clear 2% cloud 22:00 4.9 75 8 5 2B W 0 0 1006 1571 Cloudy 79% cloud Monday, 09/11 01:00 6.1 70 12 6 2B W 0 0 1005 1381 Cloudy 64% cloud 04:00 6.1 76 14 8 3B SW 0.15 0 1004 1322 Partly cloudy 37% cloud 07:00 5.6 93 18 10 3B W 0.98 0 1006 1134 Overcast 90% cloud 10:00 7.4 73 27 15 4B NW 0.18 0 1007 1120 Overcast 99% cloud 13:00 8.2 74 24 13 4B NW 0.58 0 1008 1242 Cloudy 70% cloud 16:00 7.4 63 26 14 4B NW 0.18 0 1011 1110 Overcast 96% cloud 19:00 5.2 74 21 11 4B NW 0 0 1013 992 Cloudy 75% cloud 22:00 4.2 73 15 8 3B NW 0 0 1014 965 Overcast 98% cloud Tuesday, 10/11 01:00 5.2 72 18 10 3B NW 0 0 1015 928 Overcast 95% cloud |
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Forecast table times: America/New_York.
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 Local time Temp. (°C) Humidity (%) Wind (km/h) Wind (knots) Wind (Bft) Direction Precip. (mm) Snow (cm) Pressure (hPa) Freezing (m) Conditions | Wednesday, 04/11 01:00 12.3 70 17 9 3B SW — — 1022 3162 Overcast 80% cloud 04:00 12 73 20 11 4B SW 0 0 1021 3157 Cloudy 58% cloud 07:00 11.5 76 15 8 3B SW 0 0 1021 3157 Clear 0% cloud 10:00 16.3 60 18 10 3B SW 0 0 1020 3152 Clear 0% cloud 13:00 18.2 59 22 12 4B SW 0 0 1018 3141 Clear 0% cloud 16:00 16.9 65 22 12 4B SW 0 0 1017 3137 Clear 0% cloud 19:00 14.1 73 26 14 4B SW 0 0 1017 3135 Clear 0% cloud 22:00 13.2 72 27 15 4B SW 0 0 1017 3127 Clear 2% cloud Thursday, 05/11 01:00 12.5 83 29 16 5B SW 0 0 1016 3115 Partly cloudy 32% cloud 04:00 12.6 93 30 16 5B SW 0 0 1015 3102 Overcast 98% cloud 07:00 13.6 99 30 16 5B S 0 0 1014 3098 Overcast 100% cloud 10:00 14.8 99 35 19 5B S 2.0 0 1013 3091 Overcast 100% cloud 13:00 15.4 99 33 18 5B SW 3.5 0 1011 3074 Overcast 99% cloud 16:00 16.3 93 30 16 5B SW 0.43 0 1010 3071 Overcast 98% cloud 19:00 15.6 98 28 15 4B S 0.49 0 1011 3077 Overcast 82% cloud 22:00 15.4 100 32 17 5B SW 1.9 0 1011 3075 Overcast 100% cloud Friday, 06/11 01:00 15.2 99 20 11 4B SW 0.17 0 1011 3066 Overcast 100% cloud 04:00 14 98 9 5 2B NW 1.0 0 1012 3065 Overcast 99% cloud 07:00 13 96 1 1 1B W 0.01 0 1013 3068 Overcast 95% cloud 10:00 16 81 5 2 1B SW 0.03 0 1013 3070 Cloudy 68% cloud 13:00 18 62 9 5 2B SW 0 0 1011 3058 Overcast 85% cloud 16:00 16.3 72 7 4 2B W 0 0 1011 3053 Overcast 96% cloud 19:00 13.7 80 4 2 1B NW 0 0 1012 3054 Overcast 100% cloud 22:00 12.4 82 12 6 2B N 0 0 1011 3046 Overcast 100% cloud Saturday, 07/11 01:00 12 79 18 9 3B NE 0 0 1010 2912 Overcast 100% cloud 04:00 11.4 89 23 13 4B NE 0 0 1010 2887 Cloudy 73% cloud 07:00 10.6 92 26 14 4B E 0 0 1010 2852 Partly cloudy 35% cloud 10:00 12.7 79 17 9 3B E 0 0 1009 2784 Cloudy 54% cloud 13:00 11.9 84 10 6 2B E 0.08 0 1008 2652 Overcast 100% cloud 16:00 10.6 93 6 3 2B NE 1.8 0 1008 2480 Overcast 100% cloud 19:00 8.5 100 15 8 3B NW 3.9 0 1008 2266 Overcast 100% cloud 22:00 6 99 26 14 4B NW 7.8 0 1008 1954 Overcast 100% cloud Sunday, 08/11 01:00 5.8 99 24 13 4B NW 3.6 0 1007 1807 Overcast 100% cloud 04:00 4.8 97 32 17 5B NW 5.2 0 1007 1596 Overcast 100% cloud 07:00 3.9 99 36 19 5B NW 2.5 0 1009 1819 Overcast 99% cloud 10:00 5.5 87 35 19 5B NW 0.08 0 1010 1758 Cloudy 68% cloud 13:00 7.7 75 31 17 5B NW 0.16 0 1008 1400 Overcast 100% cloud 16:00 7.5 65 25 13 4B W 0.06 0 1008 1349 Partly cloudy 29% cloud 19:00 5.9 63 26 14 4B W 0 0 1007 1718 Clear 2% cloud 22:00 5.3 67 23 12 4B W 0 0 1006 1577 Cloudy 76% cloud Monday, 09/11 01:00 5.5 67 27 14 4B W 0 0 1005 1383 Cloudy 61% cloud 04:00 5.1 79 30 16 5B W 0.15 0 1004 1324 Partly cloudy 36% cloud 07:00 3.9 94 33 18 5B W 0.95 0 1006 1136 Overcast 89% cloud 10:00 4.9 82 41 22 6B NW 0.17 0 1007 1120 Overcast 99% cloud 13:00 5.7 81 36 19 5B NW 0.56 0 1008 1244 Cloudy 69% cloud 16:00 5.2 70 38 21 5B NW 0.17 0 1011 1112 Overcast 96% cloud 19:00 3.4 80 37 20 5B NW 0 0 1013 996 Cloudy 74% cloud 22:00 2.6 77 30 16 5B NW 0 0 1014 968 Overcast 98% cloud Tuesday, 10/11 01:00 3.1 79 31 17 5B NW 0 0 1015 930 Overcast 96% cloud |
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Forecast table times: America/New_York.
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.