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Ruthven 14 Day Long Range Forecast

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

Highland, United Kingdom

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

Over the next 14 days the Ruthven forecast suggests the average daytime maximum temperature will be around 5°C, with a high for the two weeks of 9°C expected on the afternoon of Wednesday 15th. The mean minimum temperature will be 1°C, dipping to its lowest on the morning of Saturday 11th at -8°C. The fortnight ahead will remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 10
Jan		18:00

SSW
SSW

 4 / 9 mph 22 / 16°F 94% 1025 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 4 / 8 mph 19 / 14°F 95% 1026 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 11
Jan		00:00

SSW
SSW

 5 / 10 mph 19 / 12°F 94% 1027 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 5 / 11 mph 19 / 11°F 93% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 4 / 8 mph 17 / 12°F 94% 1027 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 4 / 9 mph 17 / 11°F 94% 1029 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 3 / 5 mph 29 / 25°F 88% 1029 mb
Low level cloud: 1%
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
15:00

SSW
SSW

 2 / 4 mph 27 / 27°F 91% 1029 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 6 / 12 mph 23 / 16°F 92% 1031 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 17%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 6 / 14 mph 24 / 16°F 90% 1032 mb
Low level cloud: 2%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 12
Jan		00:00

SSW
SSW

 8 / 16 mph 26 / 18°F 87% 1032 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 8 / 17 mph 30 / 23°F 87% 1032 mb
Low level cloud: 10%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 7 / 15 mph 30 / 22°F 89% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 7 / 14 mph 31 / 24°F 90% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 6 / 13 mph 35 / 29°F 93% 1031 mb
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 7 / 15 mph 35 / 29°F 92% 1029 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 7 / 15 mph 35 / 29°F 91% 1028 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 8 / 16 mph 35 / 29°F 92% 1026 mb
Low level cloud: 55%
Mid level cloud: 43%
High level cloud: 54%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 13
Jan		00:00

S
S

 9 / 20 mph 37 / 30°F 96% 1024 mb
Low level cloud: 7%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 12 / 24 mph 40 / 32°F 95% 1023 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 14 / 30 mph 41 / 33°F 94% 1022 mb
Low level cloud: 19%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 13 / 27 mph 41 / 33°F 94% 1022 mb
Low level cloud: 40%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 12 / 25 mph 42 / 35°F 94% 1021 mb
Low level cloud: 61%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 16 / 33 mph 45 / 38°F 89% 1020 mb
Low level cloud: 85%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 16 / 28 mph 46 / 39°F 93% 1022 mb
Low level cloud: 82%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 16 / 31 mph 46 / 39°F 87% 1023 mb
Low level cloud: 76%
Mid level cloud: 1%
High level cloud: 19%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 14
Jan		00:00

SW
SW

 16 / 33 mph 45 / 37°F 84% 1023 mb
Low level cloud: 52%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 16 / 33 mph 44 / 37°F 85% 1023 mb
Low level cloud: 60%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 14 / 29 mph 43 / 36°F 84% 1024 mb
Low level cloud: 36%
Mid level cloud: 3%
High level cloud: 27%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 15 / 29 mph 45 / 38°F 84% 1026 mb
Low level cloud: 8%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 15 / 25 mph 46 / 40°F 85% 1027 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 16%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 15 / 26 mph 47 / 41°F 89% 1027 mb
Low level cloud: 18%
Mid level cloud: 11%
High level cloud: 7%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 13 / 27 mph 46 / 40°F 90% 1027 mb
Low level cloud: 40%
Mid level cloud: 8%
High level cloud: 20%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 14 / 29 mph 45 / 39°F 90% 1027 mb
Low level cloud: 16%
Mid level cloud: 6%
High level cloud: 11%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 15
Jan		00:00

SW
SW

 11 / 22 mph 42 / 36°F 92% 1027 mb
Low level cloud: 57%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 12 / 24 mph 40 / 33°F 92% 1026 mb
Low level cloud: 36%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 13 / 27 mph 39 / 31°F 91% 1026 mb
Low level cloud: 11%
Mid level cloud: 7%
High level cloud: 8%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 11 / 24 mph 42 / 36°F 88% 1027 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 10%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 11 / 23 mph 46 / 41°F 76% 1027 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 10 / 19 mph 48 / 43°F 73% 1027 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
18:00

SSW
SSW

 9 / 18 mph 46 / 41°F 76% 1028 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 9 / 18 mph 43 / 38°F 75% 1028 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
Jan		00:00

SSW
SSW

 8 / 16 mph 40 / 35°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 8 / 16 mph 39 / 33°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 40%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 7 / 15 mph 38 / 33°F 71% 1029 mb
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 34%
Most Significant Cloud Type: medium
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 6 / 13 mph 40 / 36°F 70% 1030 mb
Low level cloud: 0%
Mid level cloud: 84%
High level cloud: 65%
Most Significant Cloud Type: medium
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 7 / 14 mph 43 / 39°F 69% 1030 mb
Low level cloud: 0%
Mid level cloud: 90%
High level cloud: 32%
Most Significant Cloud Type: medium
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 7 / 15 mph 44 / 40°F 69% 1029 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 76%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 7 / 15 mph 43 / 38°F 68% 1030 mb
Low level cloud: 0%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 7 / 15 mph 41 / 36°F 68% 1030 mb
Low level cloud: 0%
Mid level cloud: 92%
High level cloud: 33%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
Jan		00:00

SSW
SSW

 8 / 17 mph 40 / 34°F 77% 1025 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
0.0 In
06:00

SSW
SSW

 9 / 19 mph 40 / 34°F 86% 1021 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 20%
Most Significant Cloud Type: medium
9%
0.0 In
12:00

SSW
SSW

 13 / 25 mph 50 / 45°F 67% 1032 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 14%
Most Significant Cloud Type: medium
46%
0.0 In
18:00

SSW
SSW

 15 / 26 mph 49 / 44°F 75% 1025 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 11%
Most Significant Cloud Type: medium
26%
0.0 In
Sat 18
Jan		00:00

SSW
SSW

 9 / 19 mph 38 / 32°F 90% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

SSW
SSW

 6 / 12 mph 32 / 26°F 77% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

S
S

 6 / 10 mph 41 / 36°F 84% 1009 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 56%
Most Significant Cloud Type: medium
27%
0.0 In
18:00

SSW
SSW

 8 / 15 mph 41 / 35°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 31%
Most Significant Cloud Type: high
31%
0.0 In
Sun 19
Jan		00:00

SSW
SSW

 6 / 13 mph 39 / 34°F 89% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
06:00

WSW
WSW

 6 / 12 mph 40 / 36°F 92% 1026 mb
Low level cloud: 23%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SSW
SSW

 6 / 11 mph 42 / 38°F 80% 1015 mb
Low level cloud: 54%
Mid level cloud: 46%
High level cloud: 97%
Most Significant Cloud Type: low
81%
0.0 In
18:00

E
E

 3 / 5 mph 38 / 36°F 89% 1030 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
Mon 20
Jan		00:00

SW
SW

 14 / 24 mph 41 / 34°F 80% 1017 mb
Low level cloud: 17%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: low
21%
0.0 In
06:00

WSW
WSW

 1 / 2 mph 35 / 35°F 86% 1024 mb
Low level cloud: 80%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

 15 / 22 mph 44 / 37°F 69% 1022 mb
Low level cloud: 4%
Mid level cloud: 7%
High level cloud: 7%
Most Significant Cloud Type: low
7%
0.0 In
18:00

SW
SW

 3 / 4 mph 41 / 40°F 89% 1016 mb
Low level cloud: 59%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
86%
0.0 In
Tue 21
Jan		00:00

S
S

 8 / 17 mph 36 / 30°F 87% 1024 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 90%
Most Significant Cloud Type: high
90%
0.0 In
06:00

WSW
WSW

 5 / 11 mph 36 / 32°F 86% 1016 mb
Low level cloud: 90%
Mid level cloud: 46%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

 4 / 7 mph 39 / 36°F 77% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
18:00

NNW
NNW

 5 / 6 mph 40 / 36°F 88% 1027 mb
Low level cloud: 50%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: low
66%
0.1 In
Wed 22
Jan		00:00

SSE
SSE

 12 / 21 mph 38 / 31°F 74% 1011 mb
Low level cloud: 4%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

WSW
WSW

 5 / 11 mph 31 / 25°F 82% 1031 mb
Low level cloud: 36%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
12:00

SW
SW

 9 / 11 mph 42 / 36°F 82% 1016 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
5%
0.0 In
18:00

SSW
SSW

 4 / 6 mph 36 / 33°F 82% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 23
Jan		00:00

SSW
SSW

 11 / 16 mph 40 / 34°F 76% 1013 mb
Low level cloud: 62%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
89%
0.0 In
06:00

SW
SW

 7 / 15 mph 29 / 22°F 80% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

SSW
SSW

 12 / 26 mph 45 / 39°F 85% 1011 mb
Low level cloud: 81%
Mid level cloud: 65%
High level cloud: 16%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

 8 / 11 mph 34 / 28°F 77% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 73%
Most Significant Cloud Type: high
73%
0.0 In
Fri 24
Jan		00:00

SW
SW

 20 / 33 mph 45 / 38°F 64% 1013 mb
Low level cloud: 10%
Mid level cloud: 13%
High level cloud: 1%
Most Significant Cloud Type: low
14%
0.0 In
06:00

SSW
SSW

 5 / 11 mph 29 / 24°F 82% 1022 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
29%
0.0 In
12:00

SW
SW

 16 / 21 mph 46 / 39°F 71% 1017 mb
Low level cloud: 57%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: low
63%
0.0 In
18:00

S
S

 4 / 6 mph 34 / 30°F 84% 1022 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Sat 25
Jan		00:00

SSE
SSE

 5 / 10 mph 38 / 35°F 87% 1017 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 75%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

S
S

 3 / 7 mph 29 / 25°F 86% 1022 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: medium
42%
0.0 In
12:00

S
S

 14 / 17 mph 50 / 45°F 80% 1000 mb
Low level cloud: 90%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSE
SSE

 6 / 9 mph 34 / 29°F 79% 1020 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 74%
Most Significant Cloud Type: medium
100%
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