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Westford 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Westford

Massachusetts, United States Of America

Long range weather outlook for Westford includes 14 day forecast summary:

The forecast for Westford in the coming two weeks is predicting the average daytime maximum temperature will be around 2°C, with a high for the two weeks of 8°C expected on the afternoon of Wednesday 14th. The mean minimum temperature will be -4°C, dipping to its lowest on the morning of Monday 19th at -10°C. The next 14 days will have most days seeing a little rain or snow. Predictions are Friday 16th will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 11
Jan		01:00

ENE
ENE

 8 / 13 mph 39 / 33°F 97% 1008 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

NNW
NNW

 9 / 14 mph 38 / 32°F 98% 1007 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 41%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 7 / 11 mph 36 / 30°F 95% 1007 mb
Low level cloud: 96%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 3 / 4 mph 39 / 37°F 86% 1007 mb
Low level cloud: 90%
Mid level cloud: 2%
High level cloud: 66%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 7 / 9 mph 43 / 39°F 58% 1005 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 10 / 16 mph 38 / 31°F 63% 1004 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 11 / 16 mph 35 / 26°F 68% 1006 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 13 / 19 mph 31 / 21°F 65% 1006 mb
Low level cloud: 5%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 12
Jan		19:00

WSW
WSW

 6 / 10 mph 34 / 29°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 7 / 11 mph 33 / 26°F 66% 1016 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 13
Jan		01:00

WSW
WSW

 6 / 11 mph 32 / 26°F 67% 1016 mb
Low level cloud: 18%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 6 / 10 mph 31 / 25°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 6 / 11 mph 30 / 24°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 6 / 9 mph 37 / 31°F 59% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 7 / 10 mph 43 / 38°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 5 / 9 mph 39 / 35°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 8 / 13 mph 36 / 30°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 98%
High level cloud: 32%
Most Significant Cloud Type: medium
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 10 / 17 mph 36 / 28°F 68% 1011 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 14
Jan		01:00

SSW
SSW

 11 / 18 mph 38 / 31°F 76% 1008 mb
Low level cloud: 0%
Mid level cloud: 75%
High level cloud: 39%
Most Significant Cloud Type: medium
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 9 / 15 mph 38 / 32°F 76% 1006 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 38%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 7 / 13 mph 37 / 31°F 81% 1007 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 17%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 8 / 12 mph 41 / 35°F 68% 1007 mb
Low level cloud: 41%
Mid level cloud: 51%
High level cloud: 33%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 7 / 11 mph 46 / 42°F 63% 1005 mb
Low level cloud: 36%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 3 / 6 mph 44 / 42°F 76% 1006 mb
Low level cloud: 57%
Mid level cloud: 47%
High level cloud: 99%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 4 / 8 mph 41 / 38°F 86% 1006 mb
Low level cloud: 16%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 3 / 5 mph 39 / 37°F 86% 1005 mb
Low level cloud: 21%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
Jan		01:00

S
S

 0 / 1 mph 38 / 38°F 87% 1003 mb
Low level cloud: 11%
Mid level cloud: 43%
High level cloud: 9%
Most Significant Cloud Type: medium
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 4 / 7 mph 36 / 33°F 93% 1001 mb
Low level cloud: 8%
Mid level cloud: 62%
High level cloud: 61%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 4 / 6 mph 35 / 32°F 96% 1001 mb
Low level cloud: 32%
Mid level cloud: 100%
High level cloud: 90%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 5 / 8 mph 39 / 35°F 85% 1002 mb
Low level cloud: 26%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 4 / 6 mph 43 / 40°F 74% 1001 mb
Low level cloud: 88%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 8 / 11 mph 38 / 32°F 91% 1003 mb
Low level cloud: 100%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 9 / 12 mph 32 / 25°F 89% 1006 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 9 / 13 mph 31 / 22°F 89% 1007 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 44%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 16
Jan		01:00

NE
NE

 11 / 16 mph 28 / 18°F 90% 1004 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 10 / 15 mph 26 / 16°F 91% 1003 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 11 / 16 mph 24 / 13°F 89% 1001 mb
Low level cloud: 99%
Mid level cloud: 92%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

N
N

 11 / 16 mph 24 / 13°F 92% 1001 mb
Low level cloud: 69%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
13:00

NNW
NNW

 10 / 14 mph 28 / 19°F 88% 1001 mb
Low level cloud: 81%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

WNW
WNW

 7 / 11 mph 32 / 25°F 80% 1004 mb
Low level cloud: 76%
Mid level cloud: 49%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 8 / 12 mph 27 / 19°F 82% 1009 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 7 / 11 mph 24 / 15°F 82% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 17
Jan		01:00

W
W

 6 / 9 mph 22 / 15°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WSW
WSW

 6 / 9 mph 21 / 13°F 84% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 2 / 3 mph 20 / 18°F 93% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 5 / 7 mph 28 / 22°F 60% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 7 / 11 mph 33 / 27°F 57% 1019 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 6 / 10 mph 33 / 26°F 72% 1019 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 3 / 5 mph 30 / 27°F 91% 1018 mb
Low level cloud: 67%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 3 / 5 mph 30 / 27°F 94% 1015 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 18
Jan		01:00

SW
SW

 7 / 10 mph 31 / 25°F 85% 1024 mb
Low level cloud: 44%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
90%
0.0 In
07:00

SW
SW

 11 / 17 mph 31 / 22°F 83% 1007 mb
Low level cloud: 26%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
48%
0.0 In
13:00

W
W

 14 / 16 mph 34 / 25°F 68% 1006 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
19:00

SW
SW

 4 / 5 mph 35 / 31°F 99% 999 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
Mon 19
Jan		01:00

WNW
WNW

 11 / 16 mph 21 / 9°F 70% 1003 mb
Low level cloud: 24%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: low
43%
0.0 In
07:00

SW
SW

 5 / 6 mph 30 / 25°F 74% 1015 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: medium
17%
0.0 In
13:00

W
W

 12 / 18 mph 19 / 7°F 80% 1014 mb
Low level cloud: 73%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SW
SW

 7 / 10 mph 21 / 12°F 75% 1012 mb
Low level cloud: 43%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: low
77%
0.0 In
Tue 20
Jan		01:00

SW
SW

 11 / 17 mph 20 / 8°F 77% 1013 mb
Low level cloud: 81%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

 11 / 16 mph 19 / 6°F 71% 1016 mb
Low level cloud: 10%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
13:00

W
W

 12 / 16 mph 30 / 20°F 46% 1017 mb
Low level cloud: 87%
Mid level cloud: 7%
High level cloud: 17%
Most Significant Cloud Type: low
92%
0.0 In
19:00

W
W

 16 / 22 mph 22 / 8°F 58% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
Wed 21
Jan		01:00

SSW
SSW

 10 / 15 mph 27 / 18°F 73% 1014 mb
Low level cloud: 4%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

WNW
WNW

 12 / 17 mph 2 / -15°F 57% 1031 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
13:00

W
W

 14 / 19 mph 34 / 25°F 60% 1008 mb
Low level cloud: 29%
Mid level cloud: 16%
High level cloud: 91%
Most Significant Cloud Type: low
45%
0.1 In
19:00

W
W

 10 / 11 mph 8 / -5°F 65% 1033 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
Thu 22
Jan		01:00

W
W

 8 / 10 mph 19 / 9°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
9%
0.0 In
07:00

WNW
WNW

 8 / 10 mph 12 / 0°F 62% 1033 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

W
W

 13 / 17 mph 25 / 14°F 45% 1012 mb
Low level cloud: 54%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: low
69%
0.0 In
19:00

WSW
WSW

 4 / 5 mph 24 / 19°F 79% 1031 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
0.0 In
Fri 23
Jan		01:00

NW
NW

 11 / 14 mph 7 / -8°F 51% 1019 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
29%
0.0 In
07:00

SSW
SSW

 6 / 8 mph 24 / 17°F 93% 1024 mb
Low level cloud: 72%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NNW
NNW

 9 / 12 mph 10 / -3°F 37% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 41%
Most Significant Cloud Type: high
41%
0.0 In
19:00

SSE
SSE

 2 / 2 mph 35 / 35°F 95% 1024 mb
Low level cloud: 96%
Mid level cloud: 77%
High level cloud: 46%
Most Significant Cloud Type: low
100%
0.0 In
Sat 24
Jan		01:00

NNW
NNW

 8 / 10 mph 9 / -3°F 57% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

SE
SE

 3 / 4 mph 35 / 32°F 99% 1021 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 78%
Most Significant Cloud Type: low
100%
0.1 In
13:00

NNW
NNW

 6 / 7 mph 20 / 12°F 41% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
19:00

SW
SW

 7 / 12 mph 44 / 40°F 94% 1017 mb
Low level cloud: 47%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
84%
0.0 In
Sun 25
Jan		01:00

NW
NW

 4 / 5 mph 19 / 12°F 67% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

SW
SW

 11 / 22 mph 47 / 42°F 95% 1014 mb
Low level cloud: 94%
Mid level cloud: 87%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NW
NW

 6 / 7 mph 28 / 21°F 39% 1024 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
19:00

WSW
WSW

 4 / 4 mph 53 / 52°F 98% 1015 mb
Low level cloud: 97%
Mid level cloud: 98%
High level cloud: 62%
Most Significant Cloud Type: low
100%
0.1 In
Mon 26
Jan		01:00

WSW
WSW

 5 / 6 mph 25 / 19°F 83% 1028 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.0 In
07:00

NNE
NNE

 7 / 10 mph 39 / 34°F 98% 1011 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 54%
Most Significant Cloud Type: low
100%
0.5 In
13:00

W
W

 10 / 13 mph 30 / 22°F 45% 1027 mb
Low level cloud: 2%
Mid level cloud: 71%
High level cloud: 0%
Most Significant Cloud Type: medium
78%
0.0 In
19:00

WNW
WNW

 11 / 16 mph 32 / 24°F 77% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
0.0 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure