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Abhainn Ruadh 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Abhainn Ruadh

Western Isles, United Kingdom

Long range weather outlook for Abhainn Ruadh includes 14 day forecast summary:

The outlook for Abhainn Ruadh in the two weeks ahead shows the average daytime maximum temperature will be around 13°C, with a high for the two weeks of 15°C expected on the afternoon of Saturday 25th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Thursday 23rd at 8°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. The indicators are that Friday 31st will have the most precipitation with an accumulation of around 15.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 22
May
15:00

NNW
NNW

17 / 20 mph 55 / 50°F 89% 1014 mb
Low level cloud: 90%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

19 / 22 mph 53 / 48°F 86% 1014 mb
Low level cloud: 87%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

21 / 24 mph 51 / 45°F 78% 1014 mb
Low level cloud: 82%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

N
N

22 / 26 mph 48 / 41°F 75% 1014 mb
Low level cloud: 54%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

23 / 31 mph 48 / 40°F 77% 1014 mb
Low level cloud: 58%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

24 / 34 mph 47 / 39°F 73% 1015 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 3%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

22 / 29 mph 49 / 41°F 70% 1016 mb
Low level cloud: 23%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

19 / 24 mph 51 / 44°F 67% 1016 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

17 / 19 mph 51 / 46°F 77% 1017 mb
Low level cloud: 79%
Mid level cloud: 69%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

17 / 19 mph 50 / 45°F 83% 1017 mb
Low level cloud: 87%
Mid level cloud: 70%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

15 / 19 mph 49 / 43°F 79% 1018 mb
Low level cloud: 78%
Mid level cloud: 45%
High level cloud: 4%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May
00:00

NNE
NNE

12 / 13 mph 51 / 46°F 81% 1017 mb
Low level cloud: 87%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

9 / 12 mph 49 / 45°F 84% 1017 mb
Low level cloud: 90%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

6 / 9 mph 49 / 45°F 82% 1017 mb
Low level cloud: 77%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

6 / 7 mph 51 / 49°F 83% 1017 mb
Low level cloud: 96%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNW
NNW

4 / 5 mph 55 / 53°F 82% 1017 mb
Low level cloud: 83%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

5 / 6 mph 56 / 55°F 82% 1016 mb
Low level cloud: 85%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

4 / 5 mph 55 / 53°F 88% 1017 mb
Low level cloud: 85%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

3 / 4 mph 53 / 51°F 90% 1017 mb
Low level cloud: 81%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

SSE
SSE

4 / 5 mph 52 / 51°F 91% 1018 mb
Low level cloud: 61%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

8 / 11 mph 51 / 48°F 92% 1017 mb
Low level cloud: 71%
Mid level cloud: 63%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

8 / 14 mph 49 / 46°F 90% 1018 mb
Low level cloud: 92%
Mid level cloud: 41%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

8 / 12 mph 53 / 50°F 84% 1017 mb
Low level cloud: 80%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

9 / 10 mph 57 / 55°F 82% 1017 mb
Low level cloud: 81%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

8 / 9 mph 60 / 57°F 83% 1017 mb
Low level cloud: 40%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

7 / 9 mph 58 / 55°F 76% 1015 mb
Low level cloud: 56%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

7 / 12 mph 55 / 52°F 81% 1015 mb
Low level cloud: 17%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 26
May
00:00

ESE
ESE

7 / 12 mph 54 / 52°F 86% 1014 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 86%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

8 / 14 mph 52 / 49°F 84% 1013 mb
Low level cloud: 26%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

7 / 16 mph 51 / 48°F 80% 1013 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 32%
Most Significant Cloud Type: medium
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

12 / 20 mph 54 / 50°F 71% 1013 mb
Low level cloud: 48%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

11 / 15 mph 59 / 55°F 71% 1013 mb
Low level cloud: 34%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

13 / 14 mph 59 / 59°F 73% 1012 mb
Low level cloud: 19%
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
18:00

S
S

11 / 13 mph 58 / 55°F 82% 1012 mb
Low level cloud: 53%
Mid level cloud: 93%
High level cloud: 85%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

9 / 11 mph 55 / 52°F 89% 1012 mb
Low level cloud: 89%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May
00:00

SE
SE

8 / 15 mph 51 / 48°F 88% 1011 mb
Low level cloud: 85%
Mid level cloud: 56%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

11 / 20 mph 50 / 46°F 92% 1011 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

9 / 16 mph 50 / 45°F 89% 1012 mb
Low level cloud: 57%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

14 / 18 mph 53 / 47°F 85% 1013 mb
Low level cloud: 53%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

17 / 20 mph 55 / 50°F 77% 1015 mb
Low level cloud: 25%
Mid level cloud: 26%
High level cloud: 4%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

16 / 18 mph 57 / 52°F 69% 1016 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

13 / 15 mph 55 / 51°F 65% 1016 mb
Low level cloud: 73%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

12 / 14 mph 53 / 49°F 80% 1016 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May
00:00

SSE
SSE

13 / 15 mph 51 / 47°F 84% 1016 mb
Low level cloud: 0%
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
03:00

SSE
SSE

15 / 22 mph 50 / 45°F 76% 1014 mb
Low level cloud: 88%
Mid level cloud: 86%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

19 / 31 mph 49 / 42°F 82% 1013 mb
Low level cloud: 92%
Mid level cloud: 74%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

18 / 28 mph 52 / 46°F 75% 1012 mb
Low level cloud: 76%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

20 / 23 mph 55 / 49°F 80% 1012 mb
Low level cloud: 91%
Mid level cloud: 83%
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

SSE
SSE

18 / 20 mph 56 / 52°F 86% 1011 mb
Low level cloud: 95%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

15 / 17 mph 55 / 50°F 91% 1010 mb
Low level cloud: 96%
Mid level cloud: 88%
High level cloud: 36%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

11 / 16 mph 53 / 49°F 91% 1010 mb
Low level cloud: 95%
Mid level cloud: 73%
High level cloud: 62%
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
Wed 29
May
00:00

SW
SW

11 / 21 mph 50 / 45°F 91% 1020 mb
Low level cloud: 89%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.0 In
06:00

NNE
NNE

4 / 8 mph 50 / 49°F 96% 1009 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

19 / 39 mph 53 / 48°F 76% 1002 mb
Low level cloud: 45%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
63%
0.0 In
18:00

SW
SW

13 / 25 mph 53 / 49°F 62% 1009 mb
Low level cloud: 63%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: low
78%
0.0 In
Thu 30
May
00:00

S
S

24 / 51 mph 49 / 41°F 93% 998 mb
Low level cloud: 90%
Mid level cloud: 43%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
06:00

N
N

6 / 10 mph 50 / 47°F 89% 1011 mb
Low level cloud: 99%
Mid level cloud: 88%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

6 / 10 mph 51 / 49°F 61% 1012 mb
Low level cloud: 49%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
57%
0.0 In
18:00

S
S

10 / 17 mph 54 / 51°F 82% 1008 mb
Low level cloud: 80%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 31
May
00:00

ESE
ESE

4 / 7 mph 50 / 49°F 72% 1011 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: medium
99%
0.0 In
06:00

SE
SE

6 / 10 mph 51 / 49°F 92% 1008 mb
Low level cloud: 91%
Mid level cloud: 77%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.1 In
12:00

N
N

1 / 2 mph 53 / 53°F 63% 1011 mb
Low level cloud: 65%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
83%
0.0 In
18:00

N
N

11 / 19 mph 54 / 51°F 96% 1010 mb
Low level cloud: 74%
Mid level cloud: 72%
High level cloud: 81%
Most Significant Cloud Type: low
100%
0.4 In
Sat 01
Jun
00:00

NNE
NNE

5 / 9 mph 49 / 47°F 85% 1012 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
06:00

NNE
NNE

10 / 18 mph 53 / 50°F 97% 1009 mb
Low level cloud: 57%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
80%
0.4 In
12:00

NE
NE

9 / 15 mph 54 / 51°F 65% 1016 mb
Low level cloud: 60%
Mid level cloud: 32%
High level cloud: 2%
Most Significant Cloud Type: low
71%
0.0 In
18:00

SSW
SSW

3 / 5 mph 58 / 59°F 89% 1010 mb
Low level cloud: 48%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
Sun 02
Jun
00:00

NNE
NNE

9 / 17 mph 47 / 43°F 80% 1017 mb
Low level cloud: 12%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
06:00

ENE
ENE

6 / 11 mph 56 / 55°F 86% 1013 mb
Low level cloud: 23%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: low
33%
0.0 In
12:00

N
N

7 / 13 mph 52 / 50°F 71% 1017 mb
Low level cloud: 81%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNW
NNW

6 / 12 mph 59 / 58°F 80% 1017 mb
Low level cloud: 15%
Mid level cloud: 30%
High level cloud: 42%
Most Significant Cloud Type: low
30%
0.0 In
Mon 03
Jun
00:00

NNE
NNE

4 / 8 mph 49 / 48°F 83% 1016 mb
Low level cloud: 8%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
9%
0.0 In
06:00

S
S

2 / 5 mph 54 / 55°F 88% 1016 mb
Low level cloud: 41%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
69%
0.0 In
12:00

SSW
SSW

10 / 18 mph 54 / 51°F 67% 1008 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

WNW
WNW

6 / 11 mph 59 / 58°F 77% 1015 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 1%
Most Significant Cloud Type: medium
12%
0.0 In
Tue 04
Jun
00:00

WSW
WSW

15 / 28 mph 49 / 43°F 80% 998 mb
Low level cloud: 60%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
63%
0.3 In
06:00

NE
NE

4 / 9 mph 53 / 52°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 76%
High level cloud: 100%
Most Significant Cloud Type: medium
79%
0.0 In
12:00

S
S

2 / 4 mph 53 / 53°F 76% 996 mb
Low level cloud: 22%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.1 In
18:00

SSW
SSW

6 / 12 mph 60 / 60°F 89% 1012 mb
Low level cloud: 52%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.0 In
Wed 05
Jun
00:00

NNW
NNW

8 / 17 mph 49 / 45°F 85% 1002 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 13%
Most Significant Cloud Type: medium
9%
0.1 In
06:00

S
S

4 / 8 mph 53 / 53°F 86% 1010 mb
Low level cloud: 81%
Mid level cloud: 42%
High level cloud: 19%
Most Significant Cloud Type: low
97%
0.0 In
12:00

NNW
NNW

13 / 26 mph 51 / 46°F 71% 1011 mb
Low level cloud: 68%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

4 / 9 mph 59 / 59°F 83% 1010 mb
Low level cloud: 56%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: low
76%
0.0 In
Thu 06
Jun
00:00

E
E

1 / 2 mph 49 / 49°F 82% 1016 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 95%
Most Significant Cloud Type: medium
25%
0.0 In
06:00

SSE
SSE

2 / 4 mph 54 / 53°F 95% 1010 mb
Low level cloud: 71%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
86%
0.2 In
12:00

SSW
SSW

17 / 36 mph 52 / 47°F 81% 1015 mb
Low level cloud: 13%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

S
S

5 / 9 mph 56 / 56°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.0 In

Other Locations Near to Abhainn Ruadh

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