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Four Houses Corner 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Four Houses Corner

Hampshire, United Kingdom

Long range weather outlook for Four Houses Corner includes 14 day forecast summary:

Taking a look at Four Houses Corner over the coming two weeks and the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 21°C expected on the afternoon of Friday 24th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Tuesday 21st at 5°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Wednesday 22nd will have the most precipitation with an accumulation of around 18.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 15
May		18:00

SSE
SSE

 7 / 8 mph 64 / 62°F 77% 1005 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 5 / 10 mph 55 / 53°F 89% 1006 mb
Low level cloud: 3%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 16
May		00:00

E
E

 4 / 9 mph 51 / 49°F 92% 1006 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 19%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 4 / 9 mph 49 / 48°F 93% 1006 mb
Low level cloud: 3%
Mid level cloud: 41%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 4 / 6 mph 53 / 52°F 90% 1006 mb
Low level cloud: 12%
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
09:00

ENE
ENE

 7 / 9 mph 58 / 57°F 83% 1006 mb
Low level cloud: 13%
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
12:00

ENE
ENE

 7 / 10 mph 60 / 57°F 87% 1006 mb
Low level cloud: 31%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: low
71%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

NNW
NNW

 3 / 4 mph 59 / 59°F 83% 1006 mb
Low level cloud: 9%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: medium
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 4 / 6 mph 59 / 57°F 90% 1006 mb
Low level cloud: 8%
Mid level cloud: 44%
High level cloud: 74%
Most Significant Cloud Type: medium
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 2 / 3 mph 54 / 56°F 94% 1006 mb
Low level cloud: 26%
Mid level cloud: 31%
High level cloud: 74%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May		00:00

WSW
WSW

 2 / 4 mph 51 / 52°F 95% 1006 mb
Low level cloud: 34%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 4 / 9 mph 49 / 47°F 96% 1007 mb
Low level cloud: 30%
Mid level cloud: 14%
High level cloud: 16%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 4 / 6 mph 52 / 50°F 88% 1008 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 14%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 6 / 7 mph 62 / 60°F 71% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 18%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 6 / 7 mph 66 / 64°F 67% 1010 mb
Low level cloud: 70%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 5 / 6 mph 67 / 64°F 71% 1010 mb
Low level cloud: 30%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 4 / 6 mph 66 / 63°F 83% 1011 mb
Low level cloud: 12%
Mid level cloud: 6%
High level cloud: 75%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 4 / 8 mph 55 / 54°F 93% 1013 mb
Low level cloud: 14%
Mid level cloud: 10%
High level cloud: 98%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May		00:00

SW
SW

 2 / 5 mph 52 / 53°F 93% 1013 mb
Low level cloud: 7%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 3 / 6 mph 51 / 51°F 93% 1013 mb
Low level cloud: 9%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 4 / 6 mph 56 / 54°F 92% 1014 mb
Low level cloud: 35%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 8 / 10 mph 62 / 62°F 83% 1014 mb
Low level cloud: 71%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 7 / 9 mph 68 / 66°F 66% 1014 mb
Low level cloud: 18%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 7 / 10 mph 68 / 66°F 71% 1013 mb
Low level cloud: 39%
Mid level cloud: 25%
High level cloud: 16%
Most Significant Cloud Type: low
49%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NE
NE

 8 / 12 mph 65 / 63°F 86% 1014 mb
Low level cloud: 18%
Mid level cloud: 31%
High level cloud: 2%
Most Significant Cloud Type: low
29%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NNE
NNE

 7 / 13 mph 54 / 53°F 96% 1015 mb
Low level cloud: 18%
Mid level cloud: 45%
High level cloud: 6%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		00:00

NNE
NNE

 6 / 10 mph 53 / 51°F 95% 1015 mb
Low level cloud: 54%
Mid level cloud: 50%
High level cloud: 2%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 6 / 9 mph 52 / 51°F 96% 1015 mb
Low level cloud: 83%
Mid level cloud: 57%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 9 / 11 mph 54 / 50°F 95% 1016 mb
Low level cloud: 68%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 11 / 14 mph 55 / 51°F 92% 1016 mb
Low level cloud: 89%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 10 / 12 mph 60 / 59°F 78% 1016 mb
Low level cloud: 93%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 11 / 15 mph 64 / 62°F 76% 1016 mb
Low level cloud: 42%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 13 / 19 mph 60 / 59°F 86% 1016 mb
Low level cloud: 22%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 11 / 17 mph 50 / 46°F 96% 1018 mb
Low level cloud: 59%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 12 / 16 mph 49 / 44°F 89% 1019 mb
Low level cloud: 87%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 12 / 17 mph 49 / 44°F 82% 1018 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 12 / 16 mph 50 / 45°F 82% 1019 mb
Low level cloud: 80%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 13 / 15 mph 56 / 51°F 72% 1019 mb
Low level cloud: 49%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 12 / 14 mph 61 / 60°F 63% 1018 mb
Low level cloud: 21%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 12 / 14 mph 63 / 61°F 62% 1017 mb
Low level cloud: 44%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 12 / 15 mph 58 / 55°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 8 / 14 mph 47 / 44°F 88% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NNE
NNE

 6 / 13 mph 43 / 38°F 94% 1017 mb
Low level cloud: 2%
Mid level cloud: 14%
High level cloud: 21%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 6 / 11 mph 42 / 38°F 98% 1016 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 7 / 10 mph 47 / 43°F 90% 1016 mb
Low level cloud: 24%
Mid level cloud: 32%
High level cloud: 17%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 8 / 10 mph 58 / 55°F 68% 1015 mb
Low level cloud: 35%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 10 / 11 mph 63 / 63°F 70% 1013 mb
Low level cloud: 84%
Mid level cloud: 45%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 11 / 13 mph 63 / 63°F 75% 1012 mb
Low level cloud: 89%
Mid level cloud: 46%
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

NE
NE

 10 / 14 mph 62 / 60°F 88% 1012 mb
Low level cloud: 50%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 9 / 13 mph 54 / 51°F 96% 1013 mb
Low level cloud: 64%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 22
May		00:00

WSW
WSW

 8 / 16 mph 51 / 48°F 97% 1010 mb
Low level cloud: 47%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ENE
ENE

 6 / 12 mph 53 / 51°F 93% 1012 mb
Low level cloud: 54%
Mid level cloud: 43%
High level cloud: 1%
Most Significant Cloud Type: low
68%
0.0 In
12:00

NNW
NNW

 7 / 14 mph 57 / 56°F 97% 1010 mb
Low level cloud: 97%
Mid level cloud: 47%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 9 / 19 mph 61 / 61°F 85% 1012 mb
Low level cloud: 59%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
63%
0.0 In
Thu 23
May		00:00

NNE
NNE

 4 / 8 mph 54 / 54°F 96% 1013 mb
Low level cloud: 62%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
06:00

SSW
SSW

 5 / 10 mph 57 / 56°F 92% 1021 mb
Low level cloud: 10%
Mid level cloud: 8%
High level cloud: 99%
Most Significant Cloud Type: medium
39%
0.0 In
12:00

NNW
NNW

 18 / 38 mph 52 / 47°F 97% 1019 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
18:00

E
E

 6 / 13 mph 61 / 61°F 90% 1017 mb
Low level cloud: 45%
Mid level cloud: 62%
High level cloud: 5%
Most Significant Cloud Type: low
67%
0.0 In
Fri 24
May		00:00

NE
NE

 13 / 27 mph 53 / 49°F 98% 1019 mb
Low level cloud: 99%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.5 In
06:00

N
N

 9 / 19 mph 51 / 48°F 94% 1018 mb
Low level cloud: 30%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
30%
0.0 In
12:00

E
E

 5 / 10 mph 63 / 63°F 85% 1021 mb
Low level cloud: 92%
Mid level cloud: 25%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNE
NNE

 13 / 27 mph 63 / 63°F 78% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 25
May		00:00

SSW
SSW

 4 / 8 mph 58 / 58°F 94% 1021 mb
Low level cloud: 9%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
06:00

NNE
NNE

 8 / 17 mph 52 / 49°F 91% 1019 mb
Low level cloud: 20%
Mid level cloud: 2%
High level cloud: 22%
Most Significant Cloud Type: low
23%
0.0 In
12:00

SSW
SSW

 8 / 16 mph 67 / 67°F 67% 1019 mb
Low level cloud: 51%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
18:00

NNE
NNE

 5 / 11 mph 66 / 66°F 76% 1016 mb
Low level cloud: 10%
Mid level cloud: 29%
High level cloud: 84%
Most Significant Cloud Type: medium
60%
0.0 In
Sun 26
May		00:00

NW
NW

 3 / 7 mph 59 / 59°F 91% 1019 mb
Low level cloud: 17%
Mid level cloud: 19%
High level cloud: 15%
Most Significant Cloud Type: low
25%
0.0 In
06:00

NNE
NNE

 5 / 11 mph 56 / 55°F 78% 1017 mb
Low level cloud: 44%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
12:00

ENE
ENE

 12 / 25 mph 72 / 76°F 74% 1017 mb
Low level cloud: 65%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.0 In
18:00

NNW
NNW

 4 / 8 mph 70 / 70°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
0.0 In
Mon 27
May		00:00

NE
NE

 12 / 26 mph 56 / 53°F 87% 1017 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
2%
0.1 In
06:00

NNW
NNW

 9 / 18 mph 51 / 48°F 86% 1019 mb
Low level cloud: 51%
Mid level cloud: 21%
High level cloud: 76%
Most Significant Cloud Type: low
67%
0.0 In
12:00

NE
NE

 19 / 40 mph 62 / 62°F 61% 1017 mb
Low level cloud: 67%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.0 In
18:00

NW
NW

 11 / 23 mph 61 / 61°F 76% 1018 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 18%
Most Significant Cloud Type: medium
16%
0.0 In
Tue 28
May		00:00

NNE
NNE

 19 / 40 mph 53 / 47°F 80% 1010 mb
Low level cloud: 95%
Mid level cloud: 84%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

 11 / 24 mph 48 / 43°F 83% 1020 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
2%
0.0 In
12:00

NE
NE

 10 / 20 mph 61 / 61°F 76% 1005 mb
Low level cloud: 79%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NW
NW

 10 / 20 mph 60 / 60°F 72% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 32%
Most Significant Cloud Type: medium
5%
0.0 In
Wed 29
May		00:00

ENE
ENE

 8 / 16 mph 56 / 54°F 96% 1007 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
38%
0.0 In
06:00

W
W

 7 / 14 mph 53 / 51°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 34%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

SSW
SSW

 4 / 8 mph 65 / 65°F 80% 1006 mb
Low level cloud: 82%
Mid level cloud: 54%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
18:00

W
W

 14 / 30 mph 56 / 53°F 73% 1016 mb
Low level cloud: 0%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: medium
86%
0.0 In
Thu 30
May		00:00

SW
SW

 3 / 7 mph 60 / 60°F 92% 1008 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: medium
24%
0.0 In
06:00

WSW
WSW

 10 / 20 mph 53 / 50°F 92% 1015 mb
Low level cloud: 82%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: low
94%
0.0 In
12:00

WSW
WSW

 6 / 12 mph 58 / 58°F 90% 1007 mb
Low level cloud: 11%
Mid level cloud: 98%
High level cloud: 88%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

WNW
WNW

 11 / 23 mph 61 / 61°F 83% 1014 mb
Low level cloud: 21%
Mid level cloud: 12%
High level cloud: 99%
Most Significant Cloud Type: low
37%
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