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Nash Point 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Nash Point

The Vale Of Glamorgan, United Kingdom

Long range weather outlook for Nash Point includes 14 day forecast summary:

The next 14 day outlook for Nash Point 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 Tuesday 20th. The average minimum temperature will be 10°C, dipping to its lowest on the morning of Friday 16th at 7°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. Predictions are Friday 23rd 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
Tue 13
May		18:00

E
E

 8 / 14 mph 65 / 62°F 82% 1017 mb
Low level cloud: 3%
Mid level cloud: 45%
High level cloud: 79%
Most Significant Cloud Type: medium
56%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

ENE
ENE

 8 / 17 mph 57 / 55°F 88% 1018 mb
Low level cloud: 30%
Mid level cloud: 32%
High level cloud: 21%
Most Significant Cloud Type: low
43%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 14
May		00:00

ENE
ENE

 11 / 22 mph 53 / 49°F 88% 1019 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 7%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 10 / 21 mph 49 / 45°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 7 / 14 mph 49 / 45°F 77% 1021 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 12 / 14 mph 58 / 55°F 65% 1021 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
12:00

E
E

 13 / 15 mph 64 / 63°F 62% 1021 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
15:00

ENE
ENE

 11 / 14 mph 67 / 65°F 59% 1021 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
18:00

ENE
ENE

 9 / 12 mph 67 / 65°F 70% 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

NE
NE

 9 / 18 mph 57 / 55°F 84% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 15
May		00:00

ENE
ENE

 9 / 14 mph 52 / 49°F 89% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 6 / 12 mph 48 / 45°F 85% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 4 / 7 mph 49 / 47°F 80% 1026 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 2 / 3 mph 58 / 58°F 58% 1026 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 17%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 2 / 2 mph 65 / 62°F 56% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 41%
Most Significant Cloud Type: high
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 6 / 7 mph 65 / 62°F 61% 1025 mb
Low level cloud: 17%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 7 / 10 mph 64 / 61°F 71% 1025 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 7 / 12 mph 52 / 49°F 86% 1027 mb
Low level cloud: 8%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 16
May		00:00

NE
NE

 7 / 13 mph 49 / 46°F 85% 1027 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 6 / 12 mph 47 / 44°F 90% 1027 mb
Low level cloud: 1%
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

 4 / 7 mph 49 / 46°F 86% 1028 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 3 / 3 mph 58 / 58°F 69% 1028 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 2 / 2 mph 65 / 62°F 63% 1027 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 3 / 3 mph 66 / 64°F 56% 1026 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

N
N

 3 / 4 mph 66 / 64°F 67% 1026 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

NNW
NNW

 7 / 10 mph 62 / 60°F 77% 1027 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
Sat 17
May		00:00

NNE
NNE

 6 / 13 mph 52 / 50°F 75% 1026 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

NNE
NNE

 4 / 10 mph 50 / 49°F 78% 1026 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

NE
NE

 4 / 6 mph 52 / 50°F 76% 1026 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

ENE
ENE

 11 / 13 mph 57 / 54°F 68% 1026 mb
Low level cloud: 30%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 11 / 13 mph 64 / 63°F 62% 1025 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 9 / 12 mph 67 / 65°F 59% 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
18:00

ENE
ENE

 3 / 4 mph 67 / 65°F 68% 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
21:00

NE
NE

 6 / 8 mph 65 / 63°F 79% 1025 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
Sun 18
May		00:00

NE
NE

 7 / 14 mph 54 / 52°F 85% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

 4 / 9 mph 50 / 49°F 84% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 2 / 4 mph 54 / 53°F 78% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 3 / 4 mph 64 / 62°F 57% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 1 / 1 mph 66 / 64°F 53% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

 4 / 4 mph 66 / 64°F 56% 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
18:00

NNE
NNE

 6 / 7 mph 66 / 64°F 66% 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
21:00

N
N

 6 / 8 mph 63 / 61°F 76% 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
Mon 19
May		00:00

NNE
NNE

 6 / 13 mph 53 / 51°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 1%
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

NE
NE

 6 / 11 mph 50 / 47°F 74% 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
06:00

NE
NE

 6 / 9 mph 50 / 46°F 79% 1023 mb
Low level cloud: 25%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 13 / 15 mph 57 / 53°F 68% 1023 mb
Low level cloud: 39%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 11 / 13 mph 63 / 62°F 59% 1023 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 11 / 14 mph 65 / 64°F 58% 1022 mb
Low level cloud: 42%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 7 / 10 mph 65 / 64°F 67% 1022 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 7 / 10 mph 62 / 61°F 81% 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
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 20
May		00:00

NE
NE

 19 / 40 mph 52 / 47°F 74% 1018 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

E
E

 4 / 7 mph 60 / 60°F 85% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

E
E

 14 / 27 mph 61 / 61°F 87% 1011 mb
Low level cloud: 71%
Mid level cloud: 19%
High level cloud: 26%
Most Significant Cloud Type: low
81%
0.0 In
18:00

E
E

 13 / 26 mph 71 / 71°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 7%
Most Significant Cloud Type: medium
19%
0.0 In
Wed 21
May		00:00

NE
NE

 8 / 16 mph 53 / 51°F 81% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
5%
0.0 In
06:00

NNE
NNE

 4 / 6 mph 57 / 57°F 73% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

WSW
WSW

 6 / 13 mph 64 / 64°F 57% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

WNW
WNW

 6 / 10 mph 68 / 68°F 69% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Thu 22
May		00:00

NW
NW

 5 / 11 mph 51 / 50°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
06:00

NE
NE

 2 / 3 mph 61 / 61°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: high
10%
0.0 In
12:00

WSW
WSW

 15 / 32 mph 56 / 53°F 77% 1015 mb
Low level cloud: 78%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SW
SW

 4 / 7 mph 61 / 61°F 77% 1012 mb
Low level cloud: 70%
Mid level cloud: 45%
High level cloud: 15%
Most Significant Cloud Type: low
87%
0.0 In
Fri 23
May		00:00

SW
SW

 22 / 45 mph 48 / 40°F 97% 1002 mb
Low level cloud: 99%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
06:00

ENE
ENE

 11 / 18 mph 45 / 40°F 82% 1012 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: low
3%
0.0 In
12:00

W
W

 20 / 42 mph 51 / 45°F 90% 993 mb
Low level cloud: 91%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.3 In
18:00

ENE
ENE

 12 / 20 mph 57 / 54°F 63% 1008 mb
Low level cloud: 2%
Mid level cloud: 52%
High level cloud: 12%
Most Significant Cloud Type: medium
59%
0.0 In
Sat 24
May		00:00

WNW
WNW

 9 / 18 mph 48 / 44°F 93% 997 mb
Low level cloud: 47%
Mid level cloud: 28%
High level cloud: 10%
Most Significant Cloud Type: low
57%
0.1 In
06:00

E
E

 10 / 17 mph 47 / 42°F 72% 1007 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.0 In
12:00

NNW
NNW

 7 / 15 mph 54 / 52°F 58% 1005 mb
Low level cloud: 48%
Mid level cloud: 65%
High level cloud: 19%
Most Significant Cloud Type: low
72%
0.0 In
18:00

ENE
ENE

 9 / 16 mph 59 / 59°F 57% 1003 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 7%
Most Significant Cloud Type: medium
20%
0.0 In
Sun 25
May		00:00

NW
NW

 4 / 8 mph 54 / 53°F 75% 1011 mb
Low level cloud: 5%
Mid level cloud: 44%
High level cloud: 18%
Most Significant Cloud Type: medium
57%
0.0 In
06:00

NNE
NNE

 6 / 11 mph 49 / 46°F 74% 1004 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
12:00

WSW
WSW

 11 / 23 mph 55 / 52°F 66% 1015 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 10%
Most Significant Cloud Type: medium
23%
0.0 In
18:00

NNW
NNW

 15 / 26 mph 54 / 49°F 70% 1006 mb
Low level cloud: 3%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
Mon 26
May		00:00

NW
NW

 5 / 11 mph 51 / 50°F 86% 1018 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
06:00

WNW
WNW

 8 / 14 mph 51 / 48°F 82% 1013 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
24%
0.0 In
12:00

SW
SW

 6 / 13 mph 58 / 57°F 64% 1019 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 90%
Most Significant Cloud Type: low
45%
0.0 In
18:00

WNW
WNW

 14 / 25 mph 54 / 50°F 69% 1015 mb
Low level cloud: 42%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: low
43%
0.0 In
Tue 27
May		00:00

ESE
ESE

 8 / 16 mph 52 / 49°F 91% 1018 mb
Low level cloud: 61%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.0 In
06:00

WNW
WNW

 6 / 10 mph 53 / 51°F 80% 1016 mb
Low level cloud: 13%
Mid level cloud: 46%
High level cloud: 67%
Most Significant Cloud Type: medium
84%
0.0 In
12:00

ESE
ESE

 10 / 20 mph 54 / 52°F 98% 1015 mb
Low level cloud: 100%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
18:00

WSW
WSW

 15 / 27 mph 57 / 53°F 79% 1015 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 28
May		00:00

W
W

 12 / 26 mph 53 / 50°F 93% 1012 mb
Low level cloud: 89%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.5 In
06:00

SW
SW

 13 / 25 mph 52 / 47°F 91% 1011 mb
Low level cloud: 93%
Mid level cloud: 87%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.1 In
12:00

WSW
WSW

 13 / 27 mph 57 / 54°F 72% 1012 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
0.0 In
18:00

SSE
SSE

 12 / 25 mph 51 / 46°F 90% 1005 mb
Low level cloud: 96%
Mid level cloud: 88%
High level cloud: 0%
Most Significant Cloud Type: low
100%
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