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Shirrell Heath 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Shirrell Heath

Hampshire, United Kingdom

Long range weather outlook for Shirrell Heath includes 14 day forecast summary:

For Shirrell Heath in the coming two weeks the average daytime maximum temperature will be around 12°C, with a high for the two weeks of 14°C expected on the afternoon of Wednesday 26th. The average minimum temperature will be 6°C, dipping to its lowest on the morning of Tuesday 18th at 1°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The indicators are that Saturday 22nd will have the most precipitation with an accumulation of around 11.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Mon 17
Mar		18:00

ENE
ENE

 12 / 18 mph 43 / 37°F 70% 1026 mb
Low level cloud: 62%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 12 / 19 mph 38 / 31°F 84% 1027 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Mar		00:00

ENE
ENE

 11 / 19 mph 37 / 30°F 89% 1025 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 11 / 20 mph 37 / 29°F 86% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 11 / 21 mph 36 / 28°F 86% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

 14 / 19 mph 41 / 33°F 66% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 15 / 19 mph 47 / 41°F 48% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 17 / 22 mph 47 / 40°F 51% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 10 / 13 mph 46 / 40°F 63% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 10 / 16 mph 42 / 36°F 73% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 19
Mar		00:00

ENE
ENE

 7 / 15 mph 38 / 32°F 77% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 6 / 12 mph 37 / 32°F 82% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 5 / 10 mph 37 / 33°F 87% 1020 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 4%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 9 / 12 mph 47 / 42°F 76% 1021 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 4%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

 11 / 13 mph 54 / 50°F 70% 1021 mb
Low level cloud: 3%
Mid level cloud: 13%
High level cloud: 10%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 11 / 14 mph 54 / 50°F 69% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 17%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 6 / 9 mph 50 / 47°F 87% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 17%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 6 / 12 mph 45 / 42°F 87% 1022 mb
Low level cloud: 39%
Mid level cloud: 1%
High level cloud: 18%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 20
Mar		00:00

ESE
ESE

 4 / 8 mph 47 / 46°F 78% 1021 mb
Low level cloud: 86%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 5 / 10 mph 47 / 45°F 84% 1021 mb
Low level cloud: 4%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 4 / 8 mph 45 / 43°F 88% 1021 mb
Low level cloud: 76%
Mid level cloud: 23%
High level cloud: 2%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 7 / 10 mph 54 / 51°F 74% 1021 mb
Low level cloud: 49%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 13 / 15 mph 57 / 54°F 66% 1020 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 10%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 11 / 13 mph 58 / 55°F 67% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 6 / 9 mph 55 / 53°F 84% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 7 / 14 mph 50 / 47°F 89% 1018 mb
Low level cloud: 11%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 21
Mar		00:00

E
E

 8 / 17 mph 48 / 44°F 90% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 9 / 19 mph 48 / 44°F 88% 1014 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

E
E

 9 / 18 mph 47 / 43°F 92% 1012 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 13 / 18 mph 52 / 48°F 84% 1011 mb
Low level cloud: 14%
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

SE
SE

 10 / 15 mph 52 / 48°F 93% 1010 mb
Low level cloud: 91%
Mid level cloud: 91%
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

ESE
ESE

 10 / 14 mph 53 / 49°F 89% 1008 mb
Low level cloud: 100%
Mid level cloud: 100%
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

SE
SE

 9 / 13 mph 50 / 46°F 96% 1006 mb
Low level cloud: 100%
Mid level cloud: 76%
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

ESE
ESE

 6 / 9 mph 49 / 47°F 98% 1006 mb
Low level cloud: 69%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 22
Mar		00:00

E
E

 7 / 13 mph 50 / 46°F 96% 1004 mb
Low level cloud: 29%
Mid level cloud: 29%
High level cloud: 20%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 10 / 21 mph 48 / 43°F 93% 1001 mb
Low level cloud: 53%
Mid level cloud: 94%
High level cloud: 11%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 11 / 21 mph 47 / 42°F 98% 999 mb
Low level cloud: 95%
Mid level cloud: 97%
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

 9 / 14 mph 50 / 46°F 97% 998 mb
Low level cloud: 77%
Mid level cloud: 91%
High level cloud: 37%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
12:00

SSE
SSE

 10 / 11 mph 54 / 51°F 94% 998 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 11 / 13 mph 55 / 53°F 83% 997 mb
Low level cloud: 87%
Mid level cloud: 100%
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

SE
SE

 5 / 6 mph 54 / 53°F 96% 997 mb
Low level cloud: 72%
Mid level cloud: 100%
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

SSE
SSE

 4 / 5 mph 52 / 51°F 98% 998 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 23
Mar		00:00

SE
SE

 4 / 5 mph 49 / 48°F 99% 998 mb
Low level cloud: 96%
Mid level cloud: 44%
High level cloud: 31%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 5 / 8 mph 48 / 46°F 99% 998 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 6 / 11 mph 47 / 44°F 98% 999 mb
Low level cloud: 100%
Mid level cloud: 49%
High level cloud: 35%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 8 / 11 mph 48 / 45°F 97% 1001 mb
Low level cloud: 99%
Mid level cloud: 100%
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

S
S

 4 / 5 mph 51 / 49°F 97% 1003 mb
Low level cloud: 86%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
15:00

SSW
SSW

 8 / 10 mph 52 / 49°F 87% 1004 mb
Low level cloud: 79%
Mid level cloud: 100%
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

SSW
SSW

 5 / 6 mph 51 / 50°F 94% 1005 mb
Low level cloud: 81%
Mid level cloud: 66%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 4 / 5 mph 50 / 49°F 97% 1007 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 15%
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
Mon 24
Mar		00:00

SSW
SSW

 3 / 5 mph 51 / 51°F 92% 1003 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

NNW
NNW

 4 / 7 mph 44 / 42°F 98% 1004 mb
Low level cloud: 96%
Mid level cloud: 48%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 16 / 26 mph 51 / 46°F 82% 1004 mb
Low level cloud: 97%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WNW
WNW

 14 / 21 mph 55 / 51°F 82% 1011 mb
Low level cloud: 25%
Mid level cloud: 29%
High level cloud: 6%
Most Significant Cloud Type: low
35%
0.0 In
Tue 25
Mar		00:00

WNW
WNW

 4 / 6 mph 50 / 49°F 83% 1021 mb
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

WSW
WSW

 5 / 7 mph 45 / 42°F 87% 1019 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 10%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WSW
WSW

 14 / 23 mph 51 / 47°F 75% 1019 mb
Low level cloud: 98%
Mid level cloud: 43%
High level cloud: 37%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NW
NW

 6 / 9 mph 58 / 57°F 82% 1020 mb
Low level cloud: 61%
Mid level cloud: 31%
High level cloud: 1%
Most Significant Cloud Type: low
71%
0.0 In
Wed 26
Mar		00:00

WNW
WNW

 4 / 8 mph 50 / 49°F 96% 1018 mb
Low level cloud: 79%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
88%
0.0 In
06:00

WNW
WNW

 4 / 6 mph 49 / 48°F 93% 1022 mb
Low level cloud: 23%
Mid level cloud: 21%
High level cloud: 16%
Most Significant Cloud Type: low
31%
0.0 In
12:00

WSW
WSW

 7 / 12 mph 57 / 55°F 81% 1017 mb
Low level cloud: 68%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
18:00

WSW
WSW

 7 / 10 mph 57 / 55°F 91% 1020 mb
Low level cloud: 58%
Mid level cloud: 20%
High level cloud: 22%
Most Significant Cloud Type: low
67%
0.0 In
Thu 27
Mar		00:00

SSW
SSW

 7 / 13 mph 50 / 47°F 91% 1012 mb
Low level cloud: 92%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SW
SW

 15 / 24 mph 50 / 45°F 88% 1013 mb
Low level cloud: 97%
Mid level cloud: 81%
High level cloud: 76%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

 8 / 15 mph 51 / 48°F 98% 1005 mb
Low level cloud: 100%
Mid level cloud: 88%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

W
W

 9 / 14 mph 45 / 40°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 35%
Most Significant Cloud Type: medium
45%
0.1 In
Fri 28
Mar		00:00

SSW
SSW

 4 / 7 mph 49 / 47°F 97% 997 mb
Low level cloud: 68%
Mid level cloud: 15%
High level cloud: 11%
Most Significant Cloud Type: low
74%
0.2 In
06:00

WSW
WSW

 23 / 37 mph 49 / 41°F 86% 997 mb
Low level cloud: 65%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
79%
0.1 In
12:00

SE
SE

 9 / 17 mph 51 / 47°F 87% 992 mb
Low level cloud: 94%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

W
W

 21 / 38 mph 43 / 34°F 78% 998 mb
Low level cloud: 16%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.1 In
Sat 29
Mar		00:00

N
N

 8 / 15 mph 48 / 45°F 97% 994 mb
Low level cloud: 94%
Mid level cloud: 81%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
06:00

W
W

 18 / 32 mph 42 / 34°F 79% 1002 mb
Low level cloud: 47%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
55%
0.0 In
12:00

N
N

 14 / 26 mph 57 / 53°F 75% 1001 mb
Low level cloud: 24%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: low
36%
0.0 In
18:00

W
W

 12 / 23 mph 49 / 44°F 74% 1002 mb
Low level cloud: 0%
Mid level cloud: 64%
High level cloud: 22%
Most Significant Cloud Type: medium
65%
0.0 In
Sun 30
Mar		00:00

NNW
NNW

 6 / 12 mph 44 / 40°F 94% 1011 mb
Low level cloud: 14%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
90%
0.0 In
06:00

WNW
WNW

 13 / 24 mph 41 / 34°F 94% 998 mb
Low level cloud: 91%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

W
W

 9 / 18 mph 54 / 52°F 59% 1015 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
4%
0.0 In
18:00

WNW
WNW

 15 / 30 mph 48 / 42°F 70% 1002 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 15%
Most Significant Cloud Type: medium
17%
0.0 In
Mon 31
Mar		00:00

SW
SW

 11 / 23 mph 48 / 44°F 95% 1016 mb
Low level cloud: 83%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: low
85%
0.0 In
06:00

NW
NW

 7 / 13 mph 35 / 29°F 94% 1010 mb
Low level cloud: 15%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SSW
SSW

 17 / 34 mph 53 / 48°F 81% 1017 mb
Low level cloud: 77%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
80%
0.0 In
18:00

WNW
WNW

 16 / 31 mph 42 / 34°F 70% 1015 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
Tue 01
Apr		00:00

S
S

 4 / 8 mph 51 / 50°F 90% 1019 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
0.0 In
06:00

W
W

 3 / 6 mph 36 / 33°F 92% 1016 mb
Low level cloud: 2%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
54%
0.0 In
12:00

ESE
ESE

 11 / 23 mph 58 / 56°F 69% 1019 mb
Low level cloud: 10%
Mid level cloud: 46%
High level cloud: 59%
Most Significant Cloud Type: medium
76%
0.0 In
18:00

SSW
SSW

 24 / 48 mph 47 / 39°F 97% 994 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 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