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 86 13 7 3B SW — — 1015 3117 Clear 1% cloud 09:00 15.4 95 14 8 3B SW 0 0 1014 3107 Partly cloudy 46% cloud 12:00 16.2 93 13 7 3B SW 0 0 1014 3107 Cloudy 58% cloud 15:00 20 78 20 11 3B SW 0 0 1013 3103 Overcast 100% cloud 18:00 22.1 70 21 11 4B SW 1.1 0 1011 3089 Overcast 100% cloud 21:00 21.1 73 20 11 4B SW 0.08 0 1011 3087 Cloudy 54% cloud Friday, 06/11 00:00 19 83 18 10 3B SW 0 0 1011 3093 Clear 18% cloud 03:00 18.6 88 18 10 3B SW 0 0 1011 3090 Overcast 92% cloud 06:00 17.7 96 16 8 3B SW 0.84 0 1011 3087 Overcast 90% cloud 09:00 16.7 98 11 6 2B SW 0.32 0 1011 3083 Overcast 91% cloud 12:00 16.8 98 8 4 2B SW 0.04 0 1012 3084 Overcast 100% cloud 15:00 18.5 94 4 2 1B SW 3.0 0 1012 3082 Overcast 97% cloud 18:00 18.7 95 5 3 1B S 3.1 0 1011 3068 Overcast 100% cloud 21:00 17.6 99 6 3 1B S 3.1 0 1010 3061 Overcast 100% cloud Saturday, 07/11 00:00 16.7 98 5 3 1B S 0.22 0 1011 3059 Overcast 100% cloud 03:00 15.9 100 5 3 1B NE 0.07 0 1010 3048 Overcast 100% cloud 06:00 15.3 100 15 8 3B N 3.4 0 1009 3038 Overcast 100% cloud 09:00 13.2 98 18 9 3B NE 0.98 0 1009 3026 Overcast 93% cloud 12:00 11.6 97 17 9 3B N 1.4 0 1009 3022 Overcast 100% cloud 15:00 12.6 77 17 9 3B N 0.08 0 1009 3017 Overcast 100% cloud 18:00 12.7 72 11 6 2B N 0.02 0 1008 3000 Overcast 100% cloud 21:00 11.8 75 8 4 2B N 0.02 0 1008 2923 Overcast 100% cloud Sunday, 08/11 00:00 10.5 79 8 4 2B NE 0.12 0 1008 2758 Overcast 100% cloud 03:00 8.9 83 6 3 2B NE 0.00 0 1006 2320 Overcast 94% cloud 06:00 8.2 93 6 3 2B N 0.56 0 1005 1863 Overcast 100% cloud 09:00 7.9 98 6 3 2B NW 2.1 0 1005 1608 Overcast 100% cloud 12:00 8 96 16 9 3B NW 1.6 0 1006 1790 Overcast 100% cloud 15:00 11.2 61 19 10 3B W 0.10 0 1007 1845 Partly cloudy 35% cloud 18:00 13.5 53 24 13 4B W 0 0 1006 1675 Cloudy 67% cloud 21:00 12.4 58 16 8 3B W 0 0 1006 1987 Clear 10% cloud Monday, 09/11 00:00 8.1 78 9 5 2B SW 0 0 1005 1844 Clear 0% cloud 03:00 8.3 75 12 6 2B SW 0 0 1005 1667 Clear 18% cloud 06:00 8.2 67 13 7 3B SW 0 0 1004 1575 Clear 16% cloud 09:00 7.2 75 11 6 2B SW 0 0 1004 1562 Partly cloudy 46% cloud 12:00 8.4 74 15 8 3B W 0 0 1005 1511 Partly cloudy 21% cloud 15:00 11.7 58 21 12 4B W 0 0 1005 1388 Cloudy 62% cloud 18:00 11 63 21 11 4B NW 0.80 0 1005 1342 Partly cloudy 36% cloud 21:00 10.7 55 17 9 3B NW 0.04 0 1007 1237 Clear 16% cloud Tuesday, 10/11 00:00 8.2 60 15 8 3B NW 0.00 0 1010 1307 Clear 2% cloud 03:00 6.6 65 11 6 2B W 0 0 1011 1194 Clear 6% cloud 06:00 4.6 75 10 5 2B W 0 0 1012 1548 Clear 4% cloud 09:00 4 81 10 5 2B W 0 0 1012 2090 Clear 15% cloud 12:00 3.8 83 8 4 2B SW 0 0 1013 2454 Cloudy 70% cloud 15:00 9.6 59 10 5 2B W 0 0 1012 2516 Overcast 99% cloud 18:00 12 53 14 7 3B SW 0 0 1009 2399 Overcast 85% cloud 21:00 11.4 59 10 6 2B SW 0 0 1008 2278 Partly cloudy 44% cloud Wednesday, 11/11 00:00 10.1 66 12 7 3B SW 0 0 1008 1880 Partly cloudy 21% cloud 03:00 10.3 67 17 9 3B W 0 0 1008 1800 Clear 12% cloud 06:00 8.8 77 14 7 3B W 0 0 1009 1999 Clear 2% cloud |
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Forecast table times: UTC.
Coordinates: 42.5430349°N, -71.4454718°E · Requested elevation: 60 m. Model terrain: 76 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.

Nashoba Valley Ski Area is a downhill ski area in Massachusetts, United States. Mapped terrain includes beginner, intermediate, advanced routes. Its mapped lift network extends from approximately 60 to 131 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 14.3 86 13 7 3B SW — — 1015 3117 Clear 1% cloud 09:00 15.4 95 14 8 3B SW 0 0 1014 3107 Partly cloudy 46% cloud 12:00 16.2 93 13 7 3B SW 0 0 1014 3107 Cloudy 58% cloud 15:00 20 78 20 11 3B SW 0 0 1013 3103 Overcast 100% cloud 18:00 22.1 70 21 11 4B SW 1.1 0 1011 3089 Overcast 100% cloud 21:00 21.1 73 20 11 4B SW 0.08 0 1011 3087 Cloudy 54% cloud Friday, 06/11 00:00 19 83 18 10 3B SW 0 0 1011 3093 Clear 18% cloud 03:00 18.6 88 18 10 3B SW 0 0 1011 3090 Overcast 92% cloud 06:00 17.7 96 16 8 3B SW 0.84 0 1011 3087 Overcast 90% cloud 09:00 16.7 98 11 6 2B SW 0.32 0 1011 3083 Overcast 91% cloud 12:00 16.8 98 8 4 2B SW 0.04 0 1012 3084 Overcast 100% cloud 15:00 18.5 94 4 2 1B SW 3.1 0 1012 3082 Overcast 97% cloud 18:00 18.7 95 5 3 1B S 3.1 0 1011 3068 Overcast 100% cloud 21:00 17.6 99 6 3 1B S 3.1 0 1010 3061 Overcast 100% cloud Saturday, 07/11 00:00 16.6 98 5 3 1B S 0.22 0 1011 3059 Overcast 100% cloud 03:00 15.9 100 5 3 1B NE 0.07 0 1010 3048 Overcast 100% cloud 06:00 15.3 100 15 8 3B N 3.4 0 1009 3038 Overcast 100% cloud 09:00 13.2 98 18 9 3B NE 0.99 0 1009 3026 Overcast 93% cloud 12:00 11.6 97 17 9 3B N 1.4 0 1009 3022 Overcast 100% cloud 15:00 12.6 77 17 9 3B N 0.08 0 1009 3017 Overcast 100% cloud 18:00 12.7 72 11 6 2B N 0.02 0 1008 3000 Overcast 100% cloud 21:00 11.8 75 8 4 2B N 0.02 0 1008 2923 Overcast 100% cloud Sunday, 08/11 00:00 10.5 79 8 4 2B NE 0.12 0 1008 2759 Overcast 100% cloud 03:00 8.9 83 6 3 2B NE 0.00 0 1006 2321 Overcast 94% cloud 06:00 8.2 93 6 3 2B N 0.55 0 1005 1863 Overcast 100% cloud 09:00 7.9 98 6 3 2B NW 2.1 0 1005 1608 Overcast 100% cloud 12:00 8 96 16 9 3B NW 1.6 0 1006 1790 Overcast 100% cloud 15:00 11.2 61 19 10 3B W 0.10 0 1007 1845 Partly cloudy 35% cloud 18:00 13.5 53 24 13 4B W 0 0 1006 1675 Cloudy 67% cloud 21:00 12.4 58 16 8 3B W 0 0 1006 1988 Clear 10% cloud Monday, 09/11 00:00 8 78 9 5 2B SW 0 0 1005 1845 Clear 0% cloud 03:00 8.3 75 12 6 2B SW 0 0 1005 1668 Clear 18% cloud 06:00 8.2 67 13 7 3B SW 0 0 1004 1575 Clear 16% cloud 09:00 7.2 75 11 6 2B SW 0 0 1004 1562 Partly cloudy 46% cloud 12:00 8.4 74 15 8 3B W 0 0 1005 1511 Partly cloudy 21% cloud 15:00 11.7 58 21 12 4B W 0 0 1005 1388 Cloudy 62% cloud 18:00 11 63 21 11 4B NW 0.80 0 1005 1342 Partly cloudy 36% cloud 21:00 10.7 55 17 9 3B NW 0.04 0 1007 1237 Clear 16% cloud Tuesday, 10/11 00:00 8.2 60 15 8 3B NW 0.00 0 1010 1308 Clear 2% cloud 03:00 6.6 65 11 6 2B W 0 0 1011 1194 Clear 6% cloud 06:00 4.6 75 10 5 2B W 0 0 1012 1549 Clear 4% cloud 09:00 4 81 10 5 2B W 0 0 1012 2090 Clear 15% cloud 12:00 3.8 83 8 4 2B SW 0 0 1013 2454 Cloudy 70% cloud 15:00 9.6 59 10 5 2B W 0 0 1012 2517 Overcast 99% cloud 18:00 12 53 14 7 3B SW 0 0 1009 2399 Overcast 85% cloud 21:00 11.4 59 10 6 2B SW 0 0 1008 2280 Partly cloudy 44% cloud Wednesday, 11/11 00:00 10.1 66 12 7 3B SW 0 0 1008 1881 Partly cloudy 21% cloud 03:00 10.3 67 17 9 3B W 0 0 1008 1800 Clear 12% cloud 06:00 8.8 77 14 7 3B W 0 0 1009 1999 Clear 2% cloud |
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Forecast table times: UTC.
Coordinates: 42.5418489°N, -71.4449571°E · Requested elevation: 61 m. Model terrain: 76 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 15.3 81 20 11 4B SW — — 1015 3117 Clear 1% cloud 09:00 15.8 91 20 11 4B SW 0 0 1014 3107 Partly cloudy 46% cloud 12:00 16.3 91 19 10 3B SW 0 0 1014 3107 Cloudy 58% cloud 15:00 18.9 82 24 13 4B SW 0 0 1013 3103 Overcast 100% cloud 18:00 21.6 72 24 13 4B SW 1.1 0 1011 3089 Overcast 100% cloud 21:00 20.6 74 24 13 4B SW 0.08 0 1011 3087 Cloudy 54% cloud Friday, 06/11 00:00 18.7 83 23 12 4B SW 0 0 1011 3093 Clear 18% cloud 03:00 18.3 89 22 12 4B SW 0 0 1011 3090 Overcast 92% cloud 06:00 17.4 96 19 10 3B SW 0.84 0 1011 3087 Overcast 90% cloud 09:00 16.4 99 12 7 3B SW 0.32 0 1011 3083 Overcast 91% cloud 12:00 16.7 97 8 4 2B SW 0.04 0 1012 3084 Overcast 100% cloud 15:00 17.9 94 5 3 1B SW 3.0 0 1012 3082 Overcast 97% cloud 18:00 18.2 95 6 3 1B S 3.1 0 1011 3068 Overcast 100% cloud 21:00 17.3 99 6 3 2B S 3.1 0 1010 3061 Overcast 100% cloud Saturday, 07/11 00:00 16.4 98 4 2 1B S 0.22 0 1011 3059 Overcast 100% cloud 03:00 15.6 100 6 3 1B NE 0.06 0 1010 3048 Overcast 100% cloud 06:00 15 100 16 9 3B NE 3.4 0 1009 3038 Overcast 100% cloud 09:00 13 99 20 11 4B NE 0.99 0 1009 3026 Overcast 94% cloud 12:00 11.3 97 20 11 4B NE 1.4 0 1009 3022 Overcast 100% cloud 15:00 12.1 79 19 10 3B N 0.08 0 1009 3017 Overcast 100% cloud 18:00 12.1 74 12 7 3B N 0.02 0 1008 3000 Overcast 100% cloud 21:00 11.3 77 9 5 2B N 0.02 0 1008 2922 Overcast 100% cloud Sunday, 08/11 00:00 10 81 8 4 2B NE 0.12 0 1008 2758 Overcast 100% cloud 03:00 8.5 85 6 3 2B NE 0.00 0 1006 2319 Overcast 94% cloud 06:00 7.7 94 6 3 1B N 0.55 0 1005 1862 Overcast 100% cloud 09:00 7.4 99 7 4 2B NW 2.1 0 1005 1608 Overcast 100% cloud 12:00 7.6 96 19 10 3B NW 1.6 0 1006 1791 Overcast 100% cloud 15:00 10.5 62 23 12 4B NW 0.10 0 1007 1846 Partly cloudy 36% cloud 18:00 12.8 54 26 14 4B W 0 0 1006 1676 Cloudy 67% cloud 21:00 11.8 60 18 10 3B W 0 0 1006 1991 Clear 10% cloud Monday, 09/11 00:00 7.9 77 12 7 3B SW 0 0 1005 1844 Clear 0% cloud 03:00 8.2 74 14 8 3B SW 0 0 1005 1668 Clear 18% cloud 06:00 7.9 67 16 8 3B W 0 0 1004 1575 Clear 16% cloud 09:00 6.9 76 14 8 3B W 0 0 1004 1563 Partly cloudy 46% cloud 12:00 7.9 75 19 10 3B W 0 0 1005 1512 Partly cloudy 21% cloud 15:00 11 60 23 13 4B W 0 0 1005 1389 Cloudy 62% cloud 18:00 10.4 65 23 12 4B NW 0.81 0 1005 1342 Partly cloudy 36% cloud 21:00 10.1 56 19 10 3B NW 0.04 0 1007 1237 Clear 16% cloud Tuesday, 10/11 00:00 7.7 61 18 10 3B NW 0.00 0 1010 1309 Clear 2% cloud 03:00 6.2 66 14 8 3B W 0 0 1011 1195 Clear 6% cloud 06:00 4.3 76 12 6 2B W 0 0 1012 1551 Clear 4% cloud 09:00 5.1 73 13 7 3B W 0 0 1012 2090 Clear 15% cloud 12:00 4.7 76 11 6 2B W 0 0 1013 2455 Cloudy 70% cloud 15:00 8.3 62 11 6 2B W 0 0 1012 2518 Overcast 99% cloud 18:00 11.3 55 15 8 3B SW 0 0 1009 2400 Overcast 85% cloud 21:00 10.9 60 13 7 3B SW 0 0 1008 2280 Partly cloudy 44% cloud Wednesday, 11/11 00:00 9.9 66 16 8 3B SW 0 0 1008 1881 Partly cloudy 21% cloud 03:00 9.9 68 21 11 4B W 0 0 1008 1801 Clear 12% cloud 06:00 8.5 77 17 9 3B W 0 0 1009 2000 Clear 2% cloud |
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Forecast table times: UTC.
Coordinates: 42.5405482°N, -71.4479525°E · Requested elevation: 131 m. Model terrain: 77 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.