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Calder Vale 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Calder Vale

Lancashire, United Kingdom

Long range weather outlook for Calder Vale includes 14 day forecast summary:

For Calder Vale in the coming two weeks the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 19°C expected on the evening of Sunday 2nd. The mean minimum temperature will be 9°C, dipping to its lowest on the morning of Tuesday 28th at 6°C. The fortnight ahead will have most days seeing a little rain. It looks like Tuesday 28th will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 27
May
15:00

W
W

11 / 13 mph 57 / 54°F 68% 1012 mb
Low level cloud: 37%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

7 / 9 mph 56 / 53°F 75% 1012 mb
Low level cloud: 34%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

1 / 2 mph 52 / 50°F 88% 1013 mb
Low level cloud: 15%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May
00:00

SE
SE

5 / 9 mph 48 / 46°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

6 / 11 mph 45 / 42°F 93% 1011 mb
Low level cloud: 7%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

7 / 11 mph 49 / 45°F 90% 1010 mb
Low level cloud: 36%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

10 / 14 mph 55 / 52°F 88% 1009 mb
Low level cloud: 64%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

11 / 16 mph 54 / 50°F 97% 1007 mb
Low level cloud: 100%
Mid level cloud: 79%
High level cloud: 48%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
15:00

SW
SW

11 / 17 mph 57 / 54°F 95% 1006 mb
Low level cloud: 99%
Mid level cloud: 49%
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

SW
SW

9 / 14 mph 57 / 55°F 95% 1005 mb
Low level cloud: 97%
Mid level cloud: 66%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

11 / 16 mph 54 / 51°F 97% 1006 mb
Low level cloud: 64%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May
00:00

WSW
WSW

12 / 18 mph 53 / 49°F 95% 1006 mb
Low level cloud: 44%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

W
W

11 / 18 mph 51 / 47°F 97% 1006 mb
Low level cloud: 76%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

13 / 22 mph 50 / 45°F 96% 1007 mb
Low level cloud: 94%
Mid level cloud: 62%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

13 / 20 mph 53 / 48°F 89% 1008 mb
Low level cloud: 76%
Mid level cloud: 55%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

14 / 17 mph 56 / 52°F 87% 1008 mb
Low level cloud: 81%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

13 / 16 mph 57 / 54°F 87% 1008 mb
Low level cloud: 83%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

11 / 14 mph 56 / 53°F 87% 1008 mb
Low level cloud: 92%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

8 / 10 mph 54 / 52°F 97% 1009 mb
Low level cloud: 85%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May
00:00

WNW
WNW

8 / 12 mph 51 / 48°F 97% 1008 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
03:00

WNW
WNW

9 / 14 mph 50 / 47°F 96% 1008 mb
Low level cloud: 77%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

5 / 8 mph 53 / 50°F 94% 1009 mb
Low level cloud: 64%
Mid level cloud: 52%
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

NNW
NNW

5 / 7 mph 54 / 53°F 92% 1011 mb
Low level cloud: 79%
Mid level cloud: 68%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

10 / 14 mph 62 / 60°F 74% 1012 mb
Low level cloud: 47%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

NNW
NNW

10 / 14 mph 61 / 59°F 78% 1014 mb
Low level cloud: 52%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NW
NW

7 / 10 mph 58 / 56°F 88% 1015 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

5 / 8 mph 55 / 53°F 95% 1016 mb
Low level cloud: 11%
Mid level cloud: 48%
High level cloud: 8%
Most Significant Cloud Type: medium
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 31
May
00:00

N
N

4 / 7 mph 52 / 51°F 91% 1017 mb
Low level cloud: 3%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

5 / 10 mph 49 / 47°F 89% 1018 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

5 / 8 mph 53 / 49°F 88% 1019 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

12 / 15 mph 58 / 55°F 72% 1020 mb
Low level cloud: 23%
Mid level cloud: 12%
High level cloud: 8%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

13 / 16 mph 60 / 60°F 66% 1021 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

10 / 14 mph 62 / 60°F 66% 1021 mb
Low level cloud: 60%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

7 / 9 mph 61 / 59°F 81% 1021 mb
Low level cloud: 14%
Mid level cloud: 29%
High level cloud: 2%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

3 / 6 mph 55 / 53°F 87% 1022 mb
Low level cloud: 44%
Mid level cloud: 41%
High level cloud: 1%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 01
Jun
00:00

ENE
ENE

4 / 6 mph 52 / 51°F 85% 1022 mb
Low level cloud: 80%
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
03:00

NNE
NNE

3 / 4 mph 52 / 52°F 83% 1022 mb
Low level cloud: 98%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

6 / 9 mph 54 / 51°F 87% 1023 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
09:00

N
N

11 / 14 mph 57 / 54°F 70% 1023 mb
Low level cloud: 72%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

12 / 16 mph 59 / 56°F 65% 1023 mb
Low level cloud: 97%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

11 / 15 mph 59 / 56°F 71% 1023 mb
Low level cloud: 85%
Mid level cloud: 11%
High level cloud: 5%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

10 / 14 mph 60 / 56°F 76% 1023 mb
Low level cloud: 40%
Mid level cloud: 13%
High level cloud: 9%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

5 / 9 mph 55 / 53°F 86% 1024 mb
Low level cloud: 4%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 02
Jun
00:00

N
N

5 / 9 mph 50 / 48°F 89% 1024 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

5 / 10 mph 47 / 45°F 86% 1024 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

5 / 8 mph 49 / 46°F 76% 1025 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 3%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

9 / 12 mph 58 / 55°F 63% 1025 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 7%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

12 / 15 mph 64 / 63°F 62% 1025 mb
Low level cloud: 9%
Mid level cloud: 4%
High level cloud: 2%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

10 / 13 mph 66 / 64°F 63% 1025 mb
Low level cloud: 53%
Mid level cloud: 5%
High level cloud: 20%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

6 / 8 mph 66 / 63°F 75% 1025 mb
Low level cloud: 10%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

4 / 6 mph 58 / 56°F 89% 1026 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 47%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Mon 03
Jun
00:00

WSW
WSW

1 / 3 mph 56 / 56°F 93% 1009 mb
Low level cloud: 15%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
31%
0.0 In
06:00

W
W

6 / 12 mph 53 / 52°F 92% 1017 mb
Low level cloud: 96%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNE
NNE

6 / 12 mph 66 / 67°F 69% 1026 mb
Low level cloud: 79%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.0 In
18:00

WNW
WNW

9 / 18 mph 63 / 63°F 87% 1029 mb
Low level cloud: 25%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: low
27%
0.0 In
Tue 04
Jun
00:00

ESE
ESE

2 / 3 mph 60 / 60°F 92% 1029 mb
Low level cloud: 34%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: low
36%
0.0 In
06:00

ESE
ESE

3 / 7 mph 58 / 59°F 86% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

NNE
NNE

4 / 10 mph 70 / 70°F 66% 1027 mb
Low level cloud: 23%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
18:00

WNW
WNW

11 / 24 mph 59 / 59°F 84% 1027 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 65%
Most Significant Cloud Type: medium
50%
0.0 In
Wed 05
Jun
00:00

W
W

2 / 5 mph 62 / 62°F 92% 1026 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: medium
15%
0.0 In
06:00

WNW
WNW

8 / 16 mph 52 / 50°F 84% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

W
W

11 / 24 mph 61 / 61°F 70% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 35%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

NW
NW

17 / 35 mph 50 / 44°F 77% 1015 mb
Low level cloud: 15%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Thu 06
Jun
00:00

WSW
WSW

3 / 6 mph 58 / 58°F 86% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

W
W

17 / 36 mph 48 / 42°F 80% 1012 mb
Low level cloud: 99%
Mid level cloud: 95%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
12:00

W
W

9 / 20 mph 62 / 62°F 77% 1016 mb
Low level cloud: 39%
Mid level cloud: 7%
High level cloud: 16%
Most Significant Cloud Type: low
43%
0.0 In
18:00

WNW
WNW

20 / 41 mph 50 / 43°F 80% 1012 mb
Low level cloud: 61%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
65%
0.1 In
Fri 07
Jun
00:00

W
W

5 / 10 mph 53 / 52°F 96% 1013 mb
Low level cloud: 27%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
33%
0.0 In
06:00

NW
NW

7 / 14 mph 51 / 48°F 84% 1016 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.0 In
12:00

W
W

9 / 18 mph 61 / 61°F 62% 1012 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 43%
Most Significant Cloud Type: medium
9%
0.0 In
18:00

WNW
WNW

11 / 23 mph 52 / 48°F 75% 1019 mb
Low level cloud: 10%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: medium
99%
0.0 In
Sat 08
Jun
00:00

SSW
SSW

4 / 8 mph 55 / 55°F 64% 1008 mb
Low level cloud: 94%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SE
SE

1 / 2 mph 48 / 49°F 85% 1017 mb
Low level cloud: 34%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.1 In
12:00

WSW
WSW

15 / 33 mph 54 / 50°F 88% 1003 mb
Low level cloud: 96%
Mid level cloud: 99%
High level cloud: 15%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SE
SE

4 / 9 mph 55 / 54°F 95% 1014 mb
Low level cloud: 96%
Mid level cloud: 64%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.1 In
Sun 09
Jun
00:00

WNW
WNW

15 / 32 mph 50 / 44°F 86% 1001 mb
Low level cloud: 18%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
06:00

E
E

11 / 23 mph 47 / 42°F 94% 1014 mb
Low level cloud: 100%
Mid level cloud: 87%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
12:00

WNW
WNW

22 / 45 mph 53 / 48°F 69% 1011 mb
Low level cloud: 13%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
15%
0.0 In
18:00

ENE
ENE

3 / 6 mph 58 / 59°F 78% 1016 mb
Low level cloud: 61%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
84%
0.1 In
Mon 10
Jun
00:00

NW
NW

15 / 32 mph 49 / 44°F 65% 1018 mb
Low level cloud: 32%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
06:00

E
E

5 / 10 mph 50 / 48°F 87% 1015 mb
Low level cloud: 70%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

15 / 32 mph 53 / 48°F 61% 1023 mb
Low level cloud: 51%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: low
52%
0.0 In
18:00

ESE
ESE

4 / 8 mph 64 / 64°F 69% 1014 mb
Low level cloud: 10%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
Tue 11
Jun
00:00

WNW
WNW

6 / 12 mph 52 / 50°F 89% 1025 mb
Low level cloud: 5%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: low
8%
0.0 In
06:00

E
E

3 / 7 mph 53 / 53°F 89% 1017 mb
Low level cloud: 38%
Mid level cloud: 60%
High level cloud: 10%
Most Significant Cloud Type: low
60%
0.0 In
12:00

W
W

11 / 23 mph 60 / 60°F 70% 1025 mb
Low level cloud: 28%
Mid level cloud: 7%
High level cloud: 19%
Most Significant Cloud Type: low
32%
0.0 In
18:00

NW
NW

5 / 11 mph 64 / 64°F 76% 1019 mb
Low level cloud: 1%
Mid level cloud: 14%
High level cloud: 8%
Most Significant Cloud Type: medium
16%
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