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Felin Newydd 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Felin Newydd

Powys, United Kingdom

Long range weather outlook for Felin Newydd includes 14 day forecast summary:

For Felin Newydd in the coming two weeks the average daytime maximum temperature will be around 20°C, with a high for the two weeks of 22°C expected on the afternoon of Friday 17th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Friday 24th at 6°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 22nd will have the most precipitation with an accumulation of around 5.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Fri 17
May		03:00

S
S

 1 / 3 kts 51 / 51°F 95%
Low level cloud: 23%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 0 / 1 kts 55 / 53°F 94%
Low level cloud: 33%
Mid level cloud: 25%
High level cloud: 10%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 2 / 2 kts 65 / 63°F 80%
Low level cloud: 38%
Mid level cloud: 18%
High level cloud: 7%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

 1 / 2 kts 71 / 68°F 66%
Low level cloud: 18%
Mid level cloud: 15%
High level cloud: 24%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 3 / 3 kts 71 / 68°F 69%
Low level cloud: 8%
Mid level cloud: 13%
High level cloud: 2%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 6 / 8 kts 64 / 62°F 86%
Low level cloud: 21%
Mid level cloud: 23%
High level cloud: 26%
Most Significant Cloud Type: low
32%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NNW
NNW

 3 / 7 kts 54 / 52°F 92%
Low level cloud: 17%
Mid level cloud: 27%
High level cloud: 81%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		00:00

NW
NW

 2 / 5 kts 50 / 49°F 93%
Low level cloud: 33%
Mid level cloud: 19%
High level cloud: 16%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 2 / 5 kts 49 / 49°F 94%
Low level cloud: 73%
Mid level cloud: 25%
High level cloud: 9%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 3 / 4 kts 55 / 54°F 96%
Low level cloud: 91%
Mid level cloud: 25%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 7 / 8 kts 61 / 61°F 87%
Low level cloud: 88%
Mid level cloud: 12%
High level cloud: 14%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 7 / 8 kts 64 / 64°F 80%
Low level cloud: 87%
Mid level cloud: 28%
High level cloud: 2%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 7 / 9 kts 65 / 64°F 82%
Low level cloud: 87%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 7 / 10 kts 62 / 61°F 90%
Low level cloud: 72%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 4 / 9 kts 55 / 52°F 95%
Low level cloud: 10%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		00:00

NNW
NNW

 3 / 8 kts 51 / 49°F 95%
Low level cloud: 8%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

 2 / 6 kts 48 / 47°F 92%
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 8%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 2 / 4 kts 53 / 51°F 88%
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 5 / 6 kts 64 / 62°F 72%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 6 / 6 kts 68 / 66°F 64%
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 6 / 6 kts 71 / 68°F 60%
Low level cloud: 38%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 4 / 5 kts 67 / 65°F 78%
Low level cloud: 17%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 3 / 7 kts 54 / 51°F 92%
Low level cloud: 66%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 2 / 5 kts 49 / 49°F 97%
Low level cloud: 66%
Mid level cloud: 21%
High level cloud: 3%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 0 / 1 kts 46 / 46°F 97%
Low level cloud: 53%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 0 / 0 kts 51 / 51°F 92%
Low level cloud: 30%
Mid level cloud: 88%
High level cloud: 11%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 4 / 4 kts 59 / 57°F 81%
Low level cloud: 51%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 7 / 8 kts 65 / 63°F 69%
Low level cloud: 46%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 6 / 7 kts 66 / 64°F 62%
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
18:00

NE
NE

 4 / 5 kts 65 / 63°F 72%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 21%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 3 / 7 kts 50 / 47°F 87%
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 4%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NNW
NNW

 1 / 4 kts 44 / 44°F 87%
Low level cloud: 0%
Mid level cloud: 71%
High level cloud: 5%
Most Significant Cloud Type: medium
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 0 / 1 kts 47 / 47°F 77%
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 38%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 0 / 0 kts 52 / 50°F 79%
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 1 / 1 kts 57 / 56°F 73%
Low level cloud: 17%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 3 / 3 kts 64 / 62°F 65%
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 6%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 3 / 4 kts 68 / 65°F 65%
Low level cloud: 17%
Mid level cloud: 38%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 0 / 0 kts 65 / 62°F 82%
Low level cloud: 47%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 2 / 5 kts 52 / 52°F 90%
Low level cloud: 85%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		00:00

WSW
WSW

 2 / 5 kts 50 / 49°F 92%
Low level cloud: 81%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 3 / 6 kts 48 / 47°F 93%
Low level cloud: 45%
Mid level cloud: 46%
High level cloud: 81%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 2 / 3 kts 53 / 52°F 91%
Low level cloud: 17%
Mid level cloud: 13%
High level cloud: 17%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 3 / 4 kts 64 / 62°F 76%
Low level cloud: 77%
Mid level cloud: 13%
High level cloud: 20%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 7 / 11 kts 63 / 63°F 78%
Low level cloud: 82%
Mid level cloud: 44%
High level cloud: 27%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

NW
NW

 5 / 7 kts 68 / 65°F 65%
Low level cloud: 11%
Mid level cloud: 23%
High level cloud: 9%
Most Significant Cloud Type: low
19%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

WNW
WNW

 5 / 7 kts 63 / 61°F 77%
Low level cloud: 15%
Mid level cloud: 18%
High level cloud: 7%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 1 / 3 kts 50 / 49°F 91%
Low level cloud: 25%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		00:00

WSW
WSW

 3 / 7 kts 47 / 45°F 93%
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 5%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

 3 / 6 kts 45 / 43°F 93%
Low level cloud: 15%
Mid level cloud: 13%
High level cloud: 14%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 2 / 2 kts 52 / 51°F 91%
Low level cloud: 78%
Mid level cloud: 12%
High level cloud: 13%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 6 / 7 kts 60 / 58°F 78%
Low level cloud: 72%
Mid level cloud: 10%
High level cloud: 13%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

 8 / 9 kts 65 / 63°F 67%
Low level cloud: 34%
Mid level cloud: 23%
High level cloud: 9%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 9 / 11 kts 65 / 63°F 70%
Low level cloud: 26%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 8 / 9 kts 61 / 59°F 79%
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 4 / 8 kts 49 / 46°F 93%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityCloud AmountPrecip AmountWeather
Fri 24
May		00:00

W
W

 3 / 7 kts 45 / 43°F 95%
Low level cloud: 24%
Mid level cloud: 7%
High level cloud: 3%
Most Significant Cloud Type: low
26%
0.0 In
06:00

NW
NW

 1 / 2 kts 51 / 51°F 89%
Low level cloud: 11%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
39%
0.0 In
12:00

E
E

 8 / 17 kts 58 / 56°F 93%
Low level cloud: 100%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 4 / 9 kts 62 / 62°F 92%
Low level cloud: 87%
Mid level cloud: 64%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
Sat 25
May		00:00

NNE
NNE

 5 / 10 kts 50 / 47°F 97%
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.0 In
06:00

WSW
WSW

 3 / 7 kts 52 / 51°F 87%
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
0.0 In
12:00

ENE
ENE

 11 / 23 kts 66 / 66°F 76%
Low level cloud: 84%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.0 In
18:00

WSW
WSW

 7 / 15 kts 62 / 62°F 81%
Low level cloud: 14%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
88%
0.0 In
Sun 26
May		00:00

NE
NE

 5 / 12 kts 48 / 46°F 95%
Low level cloud: 83%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.0 In
06:00

WSW
WSW

 4 / 8 kts 58 / 58°F 97%
Low level cloud: 92%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 13 / 27 kts 64 / 64°F 76%
Low level cloud: 34%
Mid level cloud: 32%
High level cloud: 3%
Most Significant Cloud Type: low
45%
0.0 In
18:00

N
N

 6 / 13 kts 62 / 62°F 78%
Low level cloud: 9%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
Mon 27
May		00:00

NE
NE

 5 / 11 kts 53 / 51°F 99%
Low level cloud: 91%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
06:00

SW
SW

 2 / 6 kts 56 / 56°F 86%
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: medium
13%
0.0 In
12:00

ENE
ENE

 8 / 17 kts 65 / 65°F 74%
Low level cloud: 71%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
98%
0.0 In
18:00

WSW
WSW

 6 / 13 kts 69 / 69°F 78%
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
Tue 28
May		00:00

N
N

 1 / 3 kts 55 / 56°F 91%
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 58%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

N
N

 5 / 11 kts 54 / 53°F 97%
Low level cloud: 100%
Mid level cloud: 92%
High level cloud: 37%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ESE
ESE

 3 / 7 kts 68 / 68°F 63%
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
2%
0.0 In
18:00

NW
NW

 6 / 14 kts 52 / 49°F 84%
Low level cloud: 22%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: low
30%
0.6 In
Wed 29
May		00:00

SSE
SSE

 1 / 2 kts 56 / 56°F 93%
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
06:00

W
W

 6 / 14 kts 48 / 44°F 86%
Low level cloud: 67%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
12:00

E
E

 5 / 10 kts 68 / 68°F 66%
Low level cloud: 26%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.0 In
18:00

WNW
WNW

 10 / 21 kts 55 / 51°F 77%
Low level cloud: 14%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
0.1 In
Thu 30
May		00:00

ENE
ENE

 2 / 4 kts 55 / 56°F 96%
Low level cloud: 23%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
06:00

WSW
WSW

 4 / 9 kts 50 / 48°F 89%
Low level cloud: 12%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
15%
0.0 In
12:00

ENE
ENE

 7 / 16 kts 67 / 67°F 68%
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.0 In
18:00

SW
SW

 5 / 11 kts 58 / 57°F 71%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
0.0 In
Fri 31
May		00:00

NNE
NNE

 4 / 8 kts 52 / 50°F 97%
Low level cloud: 40%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
43%
0.0 In
06:00

S
S

 7 / 16 kts 50 / 47°F 92%
Low level cloud: 84%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NE
NE

 7 / 15 kts 66 / 66°F 59%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

WSW
WSW

 8 / 17 kts 63 / 63°F 81%
Low level cloud: 17%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
24%
0.1 In
Sat 01
Jun		00:00

NNW
NNW

 2 / 5 kts 54 / 54°F 92%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
06:00

SSW
SSW

 5 / 12 kts 51 / 48°F 89%
Low level cloud: 13%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
12:00

NNE
NNE

 7 / 15 kts 68 / 68°F 55%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
0.0 In
18:00

SW
SW

 8 / 18 kts 56 / 53°F 75%
Low level cloud: 4%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
0.1 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