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Glyn 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Glyn

Monmouthshire, United Kingdom

Long range weather outlook for Glyn includes 14 day forecast summary:

The next 14 day outlook for Glyn shows the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 20°C expected on the afternoon of Sunday 19th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Tuesday 21st at 6°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Predictions are Sunday 26th 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
Sat 18
May		18:00

NE
NE

 7 / 12 mph 62 / 62°F 90% 1013 mb
Low level cloud: 7%
Mid level cloud: 100%
High level cloud: 21%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NNE
NNE

 7 / 15 mph 59 / 56°F 94% 1014 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 1%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 19
May		00:00

NNE
NNE

 7 / 14 mph 53 / 51°F 95% 1015 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 7 / 14 mph 48 / 45°F 94% 1015 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
06:00

NNE
NNE

 9 / 14 mph 49 / 45°F 90% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 13 / 15 mph 58 / 55°F 78% 1016 mb
Low level cloud: 35%
Mid level cloud: 9%
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

NE
NE

 11 / 13 mph 67 / 65°F 71% 1015 mb
Low level cloud: 56%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 11 / 15 mph 68 / 66°F 70% 1014 mb
Low level cloud: 31%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 9 / 13 mph 66 / 64°F 80% 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
21:00

NE
NE

 7 / 12 mph 59 / 56°F 93% 1015 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		00:00

NE
NE

 6 / 10 mph 54 / 52°F 94% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 7 / 12 mph 48 / 45°F 92% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 8 / 12 mph 47 / 43°F 89% 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
09:00

NNE
NNE

 12 / 14 mph 57 / 53°F 75% 1015 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 13 / 15 mph 63 / 61°F 72% 1014 mb
Low level cloud: 33%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 12 / 15 mph 63 / 62°F 73% 1013 mb
Low level cloud: 74%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 11 / 16 mph 61 / 60°F 82% 1012 mb
Low level cloud: 32%
Mid level cloud: 4%
High level cloud: 8%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 8 / 13 mph 56 / 53°F 87% 1012 mb
Low level cloud: 15%
Mid level cloud: 7%
High level cloud: 12%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NE
NE

 6 / 12 mph 49 / 46°F 93% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 7 / 15 mph 44 / 40°F 89% 1011 mb
Low level cloud: 2%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 7 / 11 mph 46 / 41°F 83% 1011 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 9 / 10 mph 55 / 51°F 70% 1010 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 7 / 8 mph 62 / 60°F 68% 1010 mb
Low level cloud: 4%
Mid level cloud: 8%
High level cloud: 100%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 5 / 6 mph 65 / 62°F 68% 1009 mb
Low level cloud: 27%
Mid level cloud: 26%
High level cloud: 100%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 2 / 2 mph 62 / 62°F 78% 1009 mb
Low level cloud: 25%
Mid level cloud: 72%
High level cloud: 96%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 3 / 7 mph 56 / 55°F 87% 1010 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May		00:00

WNW
WNW

 2 / 5 mph 53 / 54°F 89% 1009 mb
Low level cloud: 9%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 3 / 6 mph 52 / 52°F 90% 1009 mb
Low level cloud: 12%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 3 / 6 mph 55 / 54°F 89% 1009 mb
Low level cloud: 1%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 4 / 5 mph 58 / 58°F 79% 1009 mb
Low level cloud: 14%
Mid level cloud: 64%
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

WNW
WNW

 6 / 7 mph 65 / 62°F 69% 1008 mb
Low level cloud: 26%
Mid level cloud: 61%
High level cloud: 100%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 6 / 9 mph 62 / 60°F 80% 1008 mb
Low level cloud: 6%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 6 / 10 mph 58 / 55°F 85% 1008 mb
Low level cloud: 28%
Mid level cloud: 76%
High level cloud: 25%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 8 / 13 mph 55 / 52°F 89% 1008 mb
Low level cloud: 22%
Mid level cloud: 74%
High level cloud: 21%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		00:00

WSW
WSW

 9 / 15 mph 53 / 50°F 95% 1007 mb
Low level cloud: 73%
Mid level cloud: 90%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 11 / 16 mph 53 / 50°F 97% 1007 mb
Low level cloud: 78%
Mid level cloud: 92%
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

SSW
SSW

 9 / 12 mph 53 / 50°F 97% 1008 mb
Low level cloud: 81%
Mid level cloud: 67%
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

SSW
SSW

 10 / 13 mph 56 / 53°F 95% 1009 mb
Low level cloud: 90%
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
12:00

SSW
SSW

 11 / 13 mph 60 / 60°F 84% 1010 mb
Low level cloud: 89%
Mid level cloud: 31%
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

SSW
SSW

 8 / 11 mph 62 / 61°F 81% 1011 mb
Low level cloud: 75%
Mid level cloud: 30%
High level cloud: 12%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 7 / 9 mph 63 / 60°F 88% 1012 mb
Low level cloud: 59%
Mid level cloud: 19%
High level cloud: 6%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 5 / 9 mph 56 / 53°F 95% 1014 mb
Low level cloud: 54%
Mid level cloud: 21%
High level cloud: 18%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

S
S

 3 / 6 mph 51 / 51°F 96% 1015 mb
Low level cloud: 60%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 2 / 3 mph 49 / 49°F 96% 1015 mb
Low level cloud: 45%
Mid level cloud: 13%
High level cloud: 8%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

 1 / 2 mph 53 / 52°F 95% 1016 mb
Low level cloud: 69%
Mid level cloud: 12%
High level cloud: 33%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 0 / 0 mph 61 / 59°F 82% 1016 mb
Low level cloud: 76%
Mid level cloud: 13%
High level cloud: 9%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 4 / 6 mph 63 / 61°F 76% 1016 mb
Low level cloud: 70%
Mid level cloud: 17%
High level cloud: 81%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 8 / 10 mph 65 / 63°F 71% 1016 mb
Low level cloud: 31%
Mid level cloud: 21%
High level cloud: 48%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 5 / 8 mph 63 / 60°F 83% 1016 mb
Low level cloud: 9%
Mid level cloud: 19%
High level cloud: 33%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 4 / 8 mph 54 / 52°F 90% 1018 mb
Low level cloud: 24%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 25
May		00:00

NNE
NNE

 13 / 26 mph 54 / 51°F 96% 1019 mb
Low level cloud: 83%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.0 In
06:00

WSW
WSW

 3 / 7 mph 57 / 57°F 88% 1025 mb
Low level cloud: 3%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
12:00

SW
SW

 9 / 19 mph 57 / 55°F 66% 1021 mb
Low level cloud: 35%
Mid level cloud: 43%
High level cloud: 65%
Most Significant Cloud Type: low
58%
0.0 In
18:00

S
S

 10 / 22 mph 62 / 62°F 83% 1019 mb
Low level cloud: 8%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
10%
0.0 In
Sun 26
May		00:00

ESE
ESE

 6 / 13 mph 56 / 54°F 98% 1014 mb
Low level cloud: 97%
Mid level cloud: 97%
High level cloud: 39%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SE
SE

 4 / 9 mph 54 / 53°F 96% 1018 mb
Low level cloud: 46%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
90%
0.0 In
12:00

WSW
WSW

 11 / 23 mph 59 / 60°F 76% 1007 mb
Low level cloud: 51%
Mid level cloud: 45%
High level cloud: 29%
Most Significant Cloud Type: low
70%
0.0 In
18:00

E
E

 7 / 15 mph 63 / 63°F 97% 1011 mb
Low level cloud: 91%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Mon 27
May		00:00

WSW
WSW

 6 / 13 mph 49 / 47°F 93% 1009 mb
Low level cloud: 10%
Mid level cloud: 85%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
0.1 In
06:00

SW
SW

 2 / 3 mph 55 / 55°F 95% 1011 mb
Low level cloud: 50%
Mid level cloud: 75%
High level cloud: 100%
Most Significant Cloud Type: low
88%
0.3 In
12:00

WNW
WNW

 11 / 23 mph 56 / 53°F 88% 1010 mb
Low level cloud: 60%
Mid level cloud: 90%
High level cloud: 13%
Most Significant Cloud Type: low
93%
0.0 In
18:00

SSW
SSW

 3 / 6 mph 59 / 59°F 89% 1009 mb
Low level cloud: 57%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
84%
0.2 In
Tue 28
May		00:00

WSW
WSW

 8 / 16 mph 52 / 49°F 93% 1011 mb
Low level cloud: 58%
Mid level cloud: 93%
High level cloud: 59%
Most Significant Cloud Type: low
97%
0.1 In
06:00

W
W

 4 / 9 mph 52 / 51°F 96% 1009 mb
Low level cloud: 89%
Mid level cloud: 69%
High level cloud: 89%
Most Significant Cloud Type: low
100%
0.1 In
12:00

NW
NW

 7 / 15 mph 62 / 62°F 73% 1013 mb
Low level cloud: 86%
Mid level cloud: 77%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.3 In
18:00

SW
SW

 8 / 16 mph 57 / 56°F 91% 1010 mb
Low level cloud: 32%
Mid level cloud: 43%
High level cloud: 19%
Most Significant Cloud Type: low
49%
0.1 In
Wed 29
May		00:00

WSW
WSW

 4 / 9 mph 54 / 53°F 94% 1014 mb
Low level cloud: 13%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: low
20%
0.0 In
06:00

WSW
WSW

 6 / 12 mph 55 / 54°F 94% 1012 mb
Low level cloud: 44%
Mid level cloud: 44%
High level cloud: 41%
Most Significant Cloud Type: low
64%
0.0 In
12:00

SSW
SSW

 12 / 26 mph 55 / 52°F 97% 1011 mb
Low level cloud: 95%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SW
SW

 10 / 20 mph 59 / 57°F 91% 1012 mb
Low level cloud: 36%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
46%
0.0 In
Thu 30
May		00:00

SW
SW

 10 / 22 mph 50 / 46°F 96% 1008 mb
Low level cloud: 53%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.2 In
06:00

S
S

 5 / 10 mph 56 / 55°F 96% 1011 mb
Low level cloud: 84%
Mid level cloud: 46%
High level cloud: 46%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WSW
WSW

 19 / 40 mph 59 / 55°F 71% 1008 mb
Low level cloud: 12%
Mid level cloud: 12%
High level cloud: 9%
Most Significant Cloud Type: low
16%
0.0 In
18:00

S
S

 7 / 15 mph 59 / 58°F 92% 1006 mb
Low level cloud: 26%
Mid level cloud: 46%
High level cloud: 87%
Most Significant Cloud Type: low
52%
0.1 In
Fri 31
May		00:00

WSW
WSW

 13 / 27 mph 51 / 46°F 90% 1012 mb
Low level cloud: 58%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
71%
0.0 In
06:00

S
S

 6 / 13 mph 55 / 53°F 94% 1003 mb
Low level cloud: 62%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
12:00

SW
SW

 13 / 27 mph 59 / 56°F 75% 1013 mb
Low level cloud: 61%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
88%
0.0 In
18:00

SSW
SSW

 13 / 28 mph 58 / 55°F 86% 1003 mb
Low level cloud: 15%
Mid level cloud: 31%
High level cloud: 2%
Most Significant Cloud Type: low
26%
0.2 In
Sat 01
Jun		00:00

SE
SE

 5 / 11 mph 53 / 52°F 97% 1012 mb
Low level cloud: 83%
Mid level cloud: 100%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SSE
SSE

 6 / 12 mph 52 / 51°F 96% 1004 mb
Low level cloud: 89%
Mid level cloud: 11%
High level cloud: 6%
Most Significant Cloud Type: low
93%
0.0 In
12:00

S
S

 15 / 31 mph 65 / 65°F 70% 1007 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
0.0 In
18:00

SSW
SSW

 10 / 20 mph 58 / 55°F 89% 1006 mb
Low level cloud: 78%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: low
94%
0.1 In
Sun 02
Jun		00:00

SSW
SSW

 22 / 47 mph 58 / 54°F 79% 1004 mb
Low level cloud: 95%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
98%
0.0 In
06:00

SSE
SSE

 7 / 14 mph 53 / 51°F 97% 1008 mb
Low level cloud: 81%
Mid level cloud: 100%
High level cloud: 57%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

 13 / 28 mph 61 / 61°F 71% 1014 mb
Low level cloud: 88%
Mid level cloud: 26%
High level cloud: 8%
Most Significant Cloud Type: low
97%
0.0 In
18:00

WSW
WSW

 12 / 25 mph 59 / 59°F 85% 1010 mb
Low level cloud: 5%
Mid level cloud: 46%
High level cloud: 40%
Most Significant Cloud Type: medium
60%
0.2 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