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 14.3 72 21 11 4B S — — 1011 3097 Clear 12% cloud 09:00 13.6 74 26 14 4B S 0 0 1011 3080 Cloudy 51% cloud 12:00 13.4 84 25 14 4B S 0 0 1010 3068 Overcast 99% cloud 15:00 15 93 25 13 4B S 1.1 0 1009 3056 Overcast 100% cloud 18:00 16.2 96 25 13 4B S 2.2 0 1007 3042 Overcast 96% cloud 21:00 16.8 92 23 12 4B SW 0.40 0 1007 3038 Cloudy 74% cloud Friday, 06/11 00:00 14.5 98 20 11 3B SW 1.8 0 1008 3041 Overcast 92% cloud 03:00 13.9 98 11 6 2B SW 2.8 0 1009 3037 Overcast 88% cloud 06:00 12.5 93 9 5 2B NW 0.76 0 1011 3029 Overcast 100% cloud 09:00 11.3 88 5 3 1B W 0.02 0 1011 3027 Partly cloudy 39% cloud 12:00 9.8 92 7 4 2B SW 0.04 0 1012 3032 Overcast 92% cloud 15:00 12.8 80 7 4 2B W 0.11 0 1013 3034 Overcast 92% cloud 18:00 14.6 61 5 3 1B NW 0 0 1012 2977 Cloudy 67% cloud 21:00 12.9 69 6 3 2B N 0 0 1012 2782 Partly cloudy 23% cloud Saturday, 07/11 00:00 9.5 81 8 4 2B NE 0 0 1013 2612 Clear 8% cloud 03:00 8.4 87 8 4 2B E 0 0 1013 2477 Overcast 98% cloud 06:00 7.6 90 6 3 2B E 0 0 1013 2441 Clear 11% cloud 09:00 7.2 92 6 3 1B E 0 0 1012 2499 Cloudy 62% cloud 12:00 7.1 96 4 2 1B E 0 0 1013 2423 Overcast 91% cloud 15:00 9.9 83 7 4 2B NE 0 0 1012 2532 Cloudy 64% cloud 18:00 12.7 70 9 5 2B NE 0.02 0 1009 2511 Overcast 98% cloud 21:00 10.3 77 10 5 2B N 0.10 0 1008 2434 Overcast 95% cloud Sunday, 08/11 00:00 8 82 11 6 2B N 0.96 0 1009 2299 Overcast 100% cloud 03:00 5.9 93 10 5 2B N 0.82 0 1008 2228 Overcast 100% cloud 06:00 3.8 96 14 7 3B NW 0.80 0 1008 1922 Overcast 100% cloud 09:00 2.2 96 17 9 3B NW 0.54 0 1008 1783 Overcast 97% cloud 12:00 2 95 18 10 3B NW 0.06 0 1009 810 Overcast 100% cloud 15:00 4.3 79 13 7 3B NW 0 0 1009 1039 Overcast 87% cloud 18:00 5.1 79 11 6 2B W 0.08 0 1006 1153 Overcast 100% cloud 21:00 5.8 82 8 4 2B SW 0.04 0 1004 1322 Partly cloudy 25% cloud Monday, 09/11 00:00 4.9 78 14 8 3B W 0.28 0 1004 1273 Overcast 100% cloud 03:00 4.3 92 12 7 2B W 0.90 0 1003 1148 Overcast 100% cloud 06:00 4.3 97 13 7 3B SW 1.3 0 1002 1247 Overcast 95% cloud 09:00 4.3 98 15 8 3B W 0.94 0 1003 1200 Overcast 100% cloud 12:00 4 99 17 9 3B NW 2.1 0 1004 1145 Overcast 99% cloud 15:00 4.3 98 21 11 4B NW 2.1 0 1006 1107 Overcast 99% cloud 18:00 4.5 94 24 13 4B NW 1.6 0 1007 1067 Overcast 99% cloud 21:00 4.3 87 24 13 4B W 0.56 0 1009 1023 Overcast 100% cloud Tuesday, 10/11 00:00 3.8 83 25 14 4B W 0.30 0 1011 967 Overcast 99% cloud 03:00 3.8 84 24 13 4B NW 0.16 0 1011 976 Overcast 94% cloud 06:00 3.1 81 22 12 4B NW 0.16 0 1012 864 Overcast 98% cloud 09:00 3 83 17 9 3B W 0.16 0 1012 862 Overcast 99% cloud 12:00 3 83 14 7 3B W 0 0 1011 931 Overcast 95% cloud 15:00 4.8 73 13 7 3B W 0 0 1011 1115 Overcast 98% cloud 18:00 5.8 72 12 7 2B S 0 0 1007 1334 Overcast 100% cloud 21:00 5.6 87 16 9 3B SW 1.2 0 1006 1322 Overcast 99% cloud Wednesday, 11/11 00:00 5.3 96 21 11 4B W 2.9 0 1007 1432 Overcast 91% cloud 03:00 5.2 97 20 11 3B W 2.0 0 1008 1320 Overcast 100% cloud 06:00 3.7 94 20 11 4B NW 0.28 0 1009 1087 Partly cloudy 21% cloud |
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Forecast table times: UTC.
Coordinates: 44.4105388°N, -72.8640397°E · Requested elevation: 475 m. Model terrain: 383 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.

Bolton Valley Resort is a downhill ski area in Vermont, United States. Mapped terrain includes easy, intermediate, advanced routes. Its mapped lift network extends from approximately 475 to 950 metres above sea level. Cross-country skiing is also mapped within the area.
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 14.3 72 21 11 4B S — — 1011 3097 Clear 12% cloud 09:00 13.6 74 26 14 4B S 0 0 1011 3080 Cloudy 51% cloud 12:00 13.4 84 25 14 4B S 0 0 1010 3068 Overcast 99% cloud 15:00 15 93 25 13 4B S 1.1 0 1009 3056 Overcast 100% cloud 18:00 16.2 96 25 13 4B S 2.2 0 1007 3042 Overcast 96% cloud 21:00 16.8 92 23 12 4B SW 0.40 0 1007 3038 Cloudy 74% cloud Friday, 06/11 00:00 14.5 98 20 11 3B SW 1.8 0 1008 3041 Overcast 92% cloud 03:00 13.9 98 11 6 2B SW 2.8 0 1009 3037 Overcast 88% cloud 06:00 12.5 93 9 5 2B NW 0.76 0 1011 3029 Overcast 100% cloud 09:00 11.3 88 5 3 1B W 0.02 0 1011 3027 Partly cloudy 39% cloud 12:00 9.8 92 7 4 2B SW 0.04 0 1012 3032 Overcast 92% cloud 15:00 12.8 80 7 4 2B W 0.11 0 1013 3034 Overcast 92% cloud 18:00 14.6 61 5 3 1B NW 0 0 1012 2977 Cloudy 67% cloud 21:00 12.9 69 6 3 2B N 0 0 1012 2782 Partly cloudy 23% cloud Saturday, 07/11 00:00 9.5 81 8 4 2B NE 0 0 1013 2612 Clear 8% cloud 03:00 8.4 87 8 4 2B E 0 0 1013 2477 Overcast 98% cloud 06:00 7.6 90 6 3 2B E 0 0 1013 2441 Clear 11% cloud 09:00 7.2 92 6 3 1B E 0 0 1012 2499 Cloudy 62% cloud 12:00 7.1 96 4 2 1B E 0 0 1013 2423 Overcast 91% cloud 15:00 9.9 83 7 4 2B NE 0 0 1012 2532 Cloudy 64% cloud 18:00 12.7 70 9 5 2B NE 0.02 0 1009 2511 Overcast 98% cloud 21:00 10.3 77 10 5 2B N 0.10 0 1008 2434 Overcast 95% cloud Sunday, 08/11 00:00 8 82 11 6 2B N 0.96 0 1009 2299 Overcast 100% cloud 03:00 5.9 93 10 5 2B N 0.82 0 1008 2228 Overcast 100% cloud 06:00 3.8 96 14 7 3B NW 0.80 0 1008 1922 Overcast 100% cloud 09:00 2.2 96 17 9 3B NW 0.54 0 1008 1783 Overcast 97% cloud 12:00 2 95 18 10 3B NW 0.06 0 1009 810 Overcast 100% cloud 15:00 4.3 79 13 7 3B NW 0 0 1009 1039 Overcast 87% cloud 18:00 5.1 79 11 6 2B W 0.08 0 1006 1153 Overcast 100% cloud 21:00 5.8 82 8 4 2B SW 0.04 0 1004 1322 Partly cloudy 25% cloud Monday, 09/11 00:00 4.9 78 14 8 3B W 0.28 0 1004 1273 Overcast 100% cloud 03:00 4.3 92 12 7 2B W 0.90 0 1003 1148 Overcast 100% cloud 06:00 4.3 97 13 7 3B SW 1.3 0 1002 1247 Overcast 95% cloud 09:00 4.3 98 15 8 3B W 0.94 0 1003 1200 Overcast 100% cloud 12:00 4 99 17 9 3B NW 2.1 0 1004 1145 Overcast 99% cloud 15:00 4.3 98 21 11 4B NW 2.1 0 1006 1107 Overcast 99% cloud 18:00 4.5 94 24 13 4B NW 1.6 0 1007 1067 Overcast 99% cloud 21:00 4.3 87 24 13 4B W 0.56 0 1009 1023 Overcast 100% cloud Tuesday, 10/11 00:00 3.8 83 25 14 4B W 0.30 0 1011 967 Overcast 99% cloud 03:00 3.8 84 24 13 4B NW 0.16 0 1011 976 Overcast 94% cloud 06:00 3.1 81 22 12 4B NW 0.16 0 1012 864 Overcast 98% cloud 09:00 3 83 17 9 3B W 0.16 0 1012 862 Overcast 99% cloud 12:00 3 83 14 7 3B W 0 0 1011 931 Overcast 95% cloud 15:00 4.8 73 13 7 3B W 0 0 1011 1115 Overcast 98% cloud 18:00 5.8 72 12 7 2B S 0 0 1007 1334 Overcast 100% cloud 21:00 5.6 87 16 9 3B SW 1.2 0 1006 1322 Overcast 99% cloud Wednesday, 11/11 00:00 5.3 96 21 11 4B W 2.9 0 1007 1432 Overcast 91% cloud 03:00 5.2 97 20 11 3B W 2.0 0 1008 1320 Overcast 100% cloud 06:00 3.7 94 20 11 4B NW 0.28 0 1009 1087 Partly cloudy 21% cloud |
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Forecast table times: UTC.
Coordinates: 44.4105388°N, -72.8640397°E · Requested elevation: 475 m. Model terrain: 383 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.
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 17.3 49 46 25 6B SW — — 1011 3097 Clear 13% cloud 09:00 15.1 56 57 31 7B SW 0 0 1011 3080 Cloudy 52% cloud 12:00 13.5 79 55 29 7B SW 0 0 1010 3068 Overcast 99% cloud 15:00 13.1 95 52 28 7B SW 0.99 0 1009 3056 Overcast 100% cloud 18:00 13.7 96 50 27 6B SW 2.2 0 1007 3042 Overcast 97% cloud 21:00 14.2 94 46 25 6B SW 0.45 0 1007 3038 Cloudy 78% cloud Friday, 06/11 00:00 12.9 97 43 23 6B SW 1.8 0 1008 3041 Overcast 93% cloud 03:00 12.3 98 30 16 5B W 3.2 0 1009 3037 Overcast 88% cloud 06:00 10.2 88 24 13 4B W 0.81 0 1011 3029 Overcast 100% cloud 09:00 9.6 80 21 11 4B W 0.01 0 1011 3027 Partly cloudy 37% cloud 12:00 9 84 19 10 3B SW 0.03 0 1012 3032 Overcast 92% cloud 15:00 8.5 85 16 8 3B W 0.11 0 1013 3034 Overcast 91% cloud 18:00 9.6 74 7 4 2B W 0 0 1012 2985 Cloudy 63% cloud 21:00 9.8 71 8 4 2B N 0 0 1012 2789 Partly cloudy 24% cloud Saturday, 07/11 00:00 9.5 71 15 8 3B NE 0 0 1013 2619 Clear 8% cloud 03:00 9 73 16 9 3B E 0 0 1013 2486 Overcast 98% cloud 06:00 8.8 75 13 7 3B E 0 0 1013 2446 Clear 11% cloud 09:00 8.6 81 14 7 3B E 0 0 1012 2503 Cloudy 70% cloud 12:00 7.5 88 13 7 3B E 0 0 1013 2425 Overcast 93% cloud 15:00 6.8 91 14 8 3B E 0 0 1012 2534 Cloudy 60% cloud 18:00 8.4 84 16 9 3B NE 0.03 0 1009 2519 Overcast 98% cloud 21:00 7.6 86 20 11 4B NE 0.10 0 1008 2441 Overcast 95% cloud Sunday, 08/11 00:00 6.2 87 21 12 4B NE 0.76 0 1009 2305 Overcast 100% cloud 03:00 4.5 95 20 11 4B N 0.66 0 1008 2229 Overcast 100% cloud 06:00 2.3 98 30 16 5B N 0.82 0 1008 1927 Overcast 100% cloud 09:00 1.1 96 43 23 6B NW 0.61 0.2 1008 1790 Overcast 97% cloud 12:00 -0.1 99 44 24 6B NW 0.04 0 1009 801 Overcast 100% cloud 15:00 0.4 92 31 17 5B NW 0 0 1008 1047 Overcast 84% cloud 18:00 1.2 93 30 16 5B W 0.07 0 1006 1152 Overcast 100% cloud 21:00 2.8 83 30 16 5B W 0.05 0 1004 1316 Partly cloudy 24% cloud Monday, 09/11 00:00 2.5 79 39 21 6B W 0.28 0 1004 1276 Overcast 100% cloud 03:00 1.4 93 33 18 5B W 0.97 0 1003 1144 Overcast 100% cloud 06:00 1.8 96 31 17 5B W 1.3 0 1002 1242 Overcast 96% cloud 09:00 1.6 99 37 20 5B W 0.94 0 1003 1202 Overcast 100% cloud 12:00 1.2 99 36 19 5B NW 2.2 0 1004 1147 Overcast 99% cloud 15:00 1 99 41 22 6B NW 2.1 0.6 1006 1107 Overcast 99% cloud 18:00 0.8 96 45 24 6B NW 1.6 0.5 1007 1070 Overcast 99% cloud 21:00 0.6 93 47 25 6B NW 0.57 0.2 1009 1025 Overcast 100% cloud Tuesday, 10/11 00:00 0.1 90 54 29 7B NW 0.31 0.1 1011 967 Overcast 99% cloud 03:00 0.2 92 50 27 6B NW 0.16 0 1011 977 Overcast 95% cloud 06:00 -0.7 91 44 24 6B NW 0.16 0 1012 864 Overcast 98% cloud 09:00 -0.7 92 35 19 5B W 0.16 0 1012 863 Overcast 99% cloud 12:00 -0.1 88 32 17 5B W 0 0 1011 931 Overcast 95% cloud 15:00 0.8 84 28 15 4B W 0 0 1011 1101 Overcast 98% cloud 18:00 2.2 76 24 13 4B SW 0 0 1007 1337 Overcast 100% cloud 21:00 3 83 37 20 5B SW 1.1 0 1006 1321 Overcast 99% cloud Wednesday, 11/11 00:00 3 95 51 27 7B W 2.8 0 1007 1433 Overcast 94% cloud 03:00 2.6 97 49 26 6B NW 1.9 0 1008 1321 Overcast 100% cloud 06:00 1.1 89 46 25 6B NW 0.27 0.1 1009 1089 Clear 20% cloud |
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Forecast table times: UTC.
Coordinates: 44.4149563°N, -72.8343743°E · Requested elevation: 950 m. Model terrain: 401 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.