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Court Hey 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Court Hey

Knowsley, United Kingdom

Long range weather outlook for Court Hey includes 14 day forecast summary:

Over the next 14 days the Court Hey forecast suggests the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 18°C expected on the afternoon of Wednesday 26th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Wednesday 26th at 8°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Sunday 23rd will have the most precipitation with an accumulation of around 34.0mm. On the whole winds are likely to be moderate. The forecast suggests the strongest wind will be on the afternoon of Sunday 23rd, coming from a northerly direction, and reaching around 33mph.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 19
Sep
15:00

WSW
WSW

17 / 23 mph 62 / 61°F 58% 1006 mb
Low level cloud: 7%
Mid level cloud: 15%
High level cloud: 74%
Most Significant Cloud Type: medium
35%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:00

WSW
WSW

12 / 18 mph 58 / 54°F 60% 1009 mb
Low level cloud: 42%
Mid level cloud: 59%
High level cloud: 95%
Most Significant Cloud Type: low
74%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SW
SW

11 / 18 mph 55 / 51°F 61% 1011 mb
Low level cloud: 31%
Mid level cloud: 77%
High level cloud: 97%
Most Significant Cloud Type: low
69%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 20
Sep
00:00

SW
SW

9 / 13 mph 53 / 50°F 77% 1011 mb
Low level cloud: 54%
Mid level cloud: 95%
High level cloud: 81%
Most Significant Cloud Type: low
97%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
03:00

SSW
SSW

5 / 7 mph 52 / 50°F 87% 1010 mb
Low level cloud: 64%
Mid level cloud: 98%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.15 In of precipitation over the past 3 hours.
0.15 In
06:00

SSE
SSE

3 / 5 mph 51 / 51°F 89% 1009 mb
Low level cloud: 51%
Mid level cloud: 94%
High level cloud: 72%
Most Significant Cloud Type: low
92%
Expect 0.10 In of precipitation over the past 3 hours.
0.10 In
09:00

SSE
SSE

4 / 5 mph 54 / 53°F 84% 1009 mb
Low level cloud: 29%
Mid level cloud: 44%
High level cloud: 72%
Most Significant Cloud Type: low
53%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:00

SE
SE

5 / 6 mph 58 / 57°F 72% 1007 mb
Low level cloud: 68%
Mid level cloud: 45%
High level cloud: 84%
Most Significant Cloud Type: low
93%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

ESE
ESE

7 / 9 mph 55 / 54°F 88% 1002 mb
Low level cloud: 91%
Mid level cloud: 92%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.12 In of precipitation over the past 3 hours.
0.12 In
18:00

SSW
SSW

14 / 23 mph 61 / 61°F 92% 996 mb
Low level cloud: 90%
Mid level cloud: 76%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.43 In of precipitation over the past 3 hours.
0.43 In
21:00

SSW
SSW

12 / 21 mph 61 / 61°F 89% 992 mb
Low level cloud: 34%
Mid level cloud: 28%
High level cloud: 11%
Most Significant Cloud Type: low
45%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
Fri 21
Sep
00:00

W
W

21 / 30 mph 54 / 49°F 83% 993 mb
Low level cloud: 89%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
03:00

W
W

21 / 33 mph 49 / 42°F 76% 999 mb
Low level cloud: 90%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
06:00

W
W

18 / 29 mph 49 / 43°F 69% 1002 mb
Low level cloud: 11%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
09:00

WSW
WSW

15 / 20 mph 50 / 45°F 72% 1003 mb
Low level cloud: 73%
Mid level cloud: 92%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
12:00

W
W

21 / 28 mph 54 / 49°F 70% 1006 mb
Low level cloud: 92%
Mid level cloud: 29%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
15:00

W
W

21 / 29 mph 56 / 51°F 64% 1009 mb
Low level cloud: 43%
Mid level cloud: 30%
High level cloud: 4%
Most Significant Cloud Type: low
54%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
18:00

W
W

16 / 25 mph 54 / 48°F 65% 1012 mb
Low level cloud: 21%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

W
W

13 / 21 mph 52 / 47°F 67% 1015 mb
Low level cloud: 26%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sat 22
Sep
00:00

W
W

12 / 18 mph 51 / 47°F 67% 1017 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

W
W

12 / 19 mph 49 / 45°F 69% 1019 mb
Low level cloud: 22%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

W
W

11 / 19 mph 48 / 44°F 70% 1020 mb
Low level cloud: 53%
Mid level cloud: 21%
High level cloud: 2%
Most Significant Cloud Type: low
60%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

W
W

13 / 16 mph 53 / 49°F 62% 1021 mb
Low level cloud: 27%
Mid level cloud: 12%
High level cloud: 33%
Most Significant Cloud Type: low
35%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

11 / 13 mph 57 / 53°F 55% 1022 mb
Low level cloud: 36%
Mid level cloud: 10%
High level cloud: 93%
Most Significant Cloud Type: low
50%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

W
W

8 / 10 mph 57 / 54°F 55% 1021 mb
Low level cloud: 38%
Mid level cloud: 24%
High level cloud: 86%
Most Significant Cloud Type: low
56%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

WSW
WSW

3 / 4 mph 54 / 53°F 61% 1020 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 87%
Most Significant Cloud Type: medium
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SE
SE

6 / 10 mph 51 / 49°F 64% 1020 mb
Low level cloud: 0%
Mid level cloud: 75%
High level cloud: 99%
Most Significant Cloud Type: medium
78%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 23
Sep
00:00

ESE
ESE

11 / 15 mph 48 / 43°F 90% 1015 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.19 In of precipitation over the past 3 hours.
0.19 In
03:00

SE
SE

19 / 28 mph 48 / 42°F 89% 1005 mb
Low level cloud: 97%
Mid level cloud: 100%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.30 In of precipitation over the past 3 hours.
0.30 In
06:00

SSE
SSE

20 / 31 mph 54 / 49°F 94% 994 mb
Low level cloud: 98%
Mid level cloud: 67%
High level cloud: 96%
Most Significant Cloud Type: low
100%
Expect 0.35 In of precipitation over the past 3 hours.
0.35 In
09:00

S
S

18 / 33 mph 63 / 62°F 89% 983 mb
Low level cloud: 45%
Mid level cloud: 64%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.19 In of precipitation over the past 3 hours.
0.19 In
12:00

SW
SW

6 / 11 mph 58 / 57°F 89% 979 mb
Low level cloud: 89%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.22 In of precipitation over the past 3 hours.
0.22 In
15:00

NNW
NNW

34 / 45 mph 52 / 44°F 77% 989 mb
Low level cloud: 87%
Mid level cloud: 78%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
18:00

NNW
NNW

29 / 44 mph 49 / 41°F 69% 1006 mb
Low level cloud: 89%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
21:00

NNW
NNW

22 / 34 mph 49 / 42°F 60% 1018 mb
Low level cloud: 34%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 24
Sep
00:00

NNW
NNW

17 / 24 mph 49 / 43°F 57% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

NNW
NNW

12 / 20 mph 48 / 43°F 55% 1029 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

NNW
NNW

7 / 13 mph 47 / 44°F 66% 1032 mb
Low level cloud: 9%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: low
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NW
NW

6 / 9 mph 51 / 49°F 72% 1034 mb
Low level cloud: 87%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:00

NW
NW

11 / 13 mph 56 / 53°F 60% 1036 mb
Low level cloud: 19%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
15:00

WNW
WNW

11 / 13 mph 56 / 52°F 62% 1036 mb
Low level cloud: 13%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: low
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

WNW
WNW

8 / 13 mph 52 / 49°F 67% 1036 mb
Low level cloud: 19%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: low
21%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

WSW
WSW

6 / 10 mph 50 / 48°F 72% 1038 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 25
Sep
00:00

WSW
WSW

6 / 11 mph 49 / 46°F 77% 1038 mb
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SW
SW

6 / 11 mph 47 / 45°F 81% 1037 mb
Low level cloud: 16%
Mid level cloud: 4%
High level cloud: 31%
Most Significant Cloud Type: low
21%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

5 / 10 mph 47 / 44°F 85% 1037 mb
Low level cloud: 18%
Mid level cloud: 3%
High level cloud: 20%
Most Significant Cloud Type: low
21%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SSW
SSW

5 / 7 mph 54 / 51°F 73% 1036 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: medium
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SSW
SSW

5 / 6 mph 59 / 58°F 60% 1035 mb
Low level cloud: 66%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: low
68%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SSW
SSW

5 / 7 mph 59 / 58°F 64% 1032 mb
Low level cloud: 70%
Mid level cloud: 6%
High level cloud: 99%
Most Significant Cloud Type: low
83%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SSW
SSW

6 / 11 mph 56 / 54°F 71% 1031 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SSW
SSW

7 / 12 mph 51 / 49°F 78% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 26
Sep
00:00

WNW
WNW

17 / 26 mph 55 / 51°F 80% 1018 mb
Low level cloud: 90%
Mid level cloud: 66%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.08 In
06:00

SE
SE

5 / 6 mph 50 / 49°F 94% 1029 mb
Low level cloud: 65%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
82%
0.00 In
12:00

S
S

4 / 5 mph 67 / 67°F 63% 1030 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 6%
Most Significant Cloud Type: low
3%
0.00 In
18:00

NNW
NNW

5 / 6 mph 63 / 63°F 74% 1033 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 18%
Most Significant Cloud Type: medium
12%
0.00 In
Thu 27
Sep
00:00

SSE
SSE

3 / 4 mph 56 / 56°F 85% 1033 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.00 In
06:00

SSW
SSW

2 / 2 mph 53 / 54°F 87% 1035 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: medium
6%
0.00 In
12:00

SSE
SSE

9 / 11 mph 61 / 61°F 63% 1034 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.00 In
18:00

NNW
NNW

4 / 5 mph 64 / 64°F 75% 1035 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: medium
11%
0.00 In
Fri 28
Sep
00:00

SE
SE

9 / 11 mph 57 / 55°F 73% 1032 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.00 In
06:00

S
S

2 / 2 mph 57 / 59°F 89% 1035 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.00 In
12:00

SE
SE

15 / 17 mph 65 / 65°F 65% 1026 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.00 In
18:00

NNW
NNW

6 / 7 mph 66 / 66°F 91% 1035 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.00 In
Sat 29
Sep
00:00

SE
SE

17 / 32 mph 49 / 43°F 77% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
06:00

NNW
NNW

3 / 4 mph 59 / 59°F 91% 1036 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.00 In
12:00

SSE
SSE

19 / 22 mph 59 / 59°F 66% 1010 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
0.00 In
18:00

NNW
NNW

6 / 6 mph 66 / 66°F 79% 1035 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: medium
14%
0.00 In
Sun 30
Sep
00:00

SE
SE

17 / 29 mph 48 / 41°F 85% 1003 mb
Low level cloud: 4%
Mid level cloud: 55%
High level cloud: 41%
Most Significant Cloud Type: medium
68%
0.07 In
06:00

E
E

3 / 4 mph 56 / 57°F 85% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
12:00

SE
SE

17 / 24 mph 53 / 47°F 90% 997 mb
Low level cloud: 73%
Mid level cloud: 44%
High level cloud: 34%
Most Significant Cloud Type: low
92%
0.27 In
18:00

ENE
ENE

5 / 6 mph 66 / 66°F 78% 1033 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.00 In
Mon 01
Oct
00:00

S
S

8 / 10 mph 51 / 48°F 93% 996 mb
Low level cloud: 8%
Mid level cloud: 19%
High level cloud: 13%
Most Significant Cloud Type: low
16%
0.13 In
06:00

ENE
ENE

5 / 6 mph 53 / 52°F 93% 1034 mb
Low level cloud: 20%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.00 In
12:00

SW
SW

12 / 15 mph 58 / 55°F 70% 998 mb
Low level cloud: 7%
Mid level cloud: 30%
High level cloud: 2%
Most Significant Cloud Type: medium
50%
0.01 In
18:00

ENE
ENE

6 / 7 mph 60 / 60°F 85% 1032 mb
Low level cloud: 47%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: low
50%
0.01 In
Tue 02
Oct
00:00

SW
SW

8 / 12 mph 50 / 47°F 90% 1000 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 15%
Most Significant Cloud Type: medium
48%
0.07 In
06:00

ENE
ENE

4 / 5 mph 53 / 53°F 93% 1032 mb
Low level cloud: 34%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: low
37%
0.00 In
12:00

WNW
WNW

18 / 29 mph 50 / 44°F 80% 1007 mb
Low level cloud: 73%
Mid level cloud: 44%
High level cloud: 7%
Most Significant Cloud Type: low
89%
0.05 In
18:00

NNE
NNE

6 / 7 mph 64 / 64°F 87% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
Wed 03
Oct
00:00

W
W

9 / 15 mph 48 / 43°F 87% 1020 mb
Low level cloud: 22%
Mid level cloud: 10%
High level cloud: 34%
Most Significant Cloud Type: low
29%
0.06 In
06:00

ENE
ENE

5 / 8 mph 53 / 51°F 93% 1028 mb
Low level cloud: 77%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: low
78%
0.00 In
12:00

S
S

9 / 10 mph 53 / 50°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 34%
Most Significant Cloud Type: medium
53%
0.00 In
18:00

SSE
SSE

2 / 3 mph 63 / 63°F 82% 1026 mb
Low level cloud: 38%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
37%
0.00 In
Thu 04
Oct
00:00

SSE
SSE

9 / 14 mph 54 / 51°F 96% 1019 mb
Low level cloud: 44%
Mid level cloud: 26%
High level cloud: 33%
Most Significant Cloud Type: low
57%
0.04 In
06:00

SSE
SSE

2 / 3 mph 57 / 57°F 91% 1025 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
9%
0.00 In
12:00

WNW
WNW

10 / 11 mph 58 / 56°F 69% 1023 mb
Low level cloud: 32%
Mid level cloud: 19%
High level cloud: 39%
Most Significant Cloud Type: low
42%
0.28 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