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Priestside 14 Day Long Range Forecast

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

Dumfries and Galloway, United Kingdom

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

Reviewing the forecast for Priestside Over the next 14 days and the average daytime maximum temperature will be around 7°C, with a high for the two weeks of 9°C expected on the evening of Wednesday 17th. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Wednesday 24th at 0°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 17th 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
Tue 16
Dec		18:00

SW
SW

 4 / 7 mph 40 / 37°F 92% 1012 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

 5 / 9 mph 38 / 34°F 92% 1012 mb
Low level cloud: 13%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 17
Dec		00:00

S
S

 7 / 15 mph 37 / 31°F 94% 1012 mb
Low level cloud: 43%
Mid level cloud: 4%
High level cloud: 46%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

 15 / 24 mph 42 / 34°F 90% 1009 mb
Low level cloud: 93%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 22 / 32 mph 44 / 35°F 90% 1006 mb
Low level cloud: 100%
Mid level cloud: 68%
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

SSW
SSW

 24 / 35 mph 45 / 36°F 95% 1005 mb
Low level cloud: 100%
Mid level cloud: 91%
High level cloud: 47%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
12:00

SSW
SSW

 24 / 35 mph 47 / 38°F 95% 1003 mb
Low level cloud: 100%
Mid level cloud: 86%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

SSW
SSW

 23 / 34 mph 48 / 40°F 96% 1001 mb
Low level cloud: 100%
Mid level cloud: 49%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 22 / 32 mph 48 / 41°F 95% 1000 mb
Low level cloud: 97%
Mid level cloud: 90%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSW
SSW

 12 / 18 mph 47 / 42°F 96% 1000 mb
Low level cloud: 59%
Mid level cloud: 29%
High level cloud: 79%
Most Significant Cloud Type: low
78%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
Thu 18
Dec		00:00

SSW
SSW

 9 / 17 mph 43 / 37°F 94% 1000 mb
Low level cloud: 72%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 15 / 26 mph 41 / 34°F 89% 1001 mb
Low level cloud: 20%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 13 / 26 mph 40 / 33°F 86% 1002 mb
Low level cloud: 40%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 5 / 7 mph 43 / 40°F 94% 1002 mb
Low level cloud: 36%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 8 / 9 mph 46 / 42°F 90% 999 mb
Low level cloud: 10%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 11 / 13 mph 47 / 42°F 92% 993 mb
Low level cloud: 100%
Mid level cloud: 92%
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

 8 / 9 mph 46 / 42°F 95% 990 mb
Low level cloud: 99%
Mid level cloud: 76%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

WSW
WSW

 18 / 21 mph 44 / 36°F 84% 994 mb
Low level cloud: 32%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Dec		00:00

SW
SW

 24 / 31 mph 43 / 33°F 86% 997 mb
Low level cloud: 100%
Mid level cloud: 68%
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

 26 / 47 mph 41 / 31°F 81% 998 mb
Low level cloud: 84%
Mid level cloud: 29%
High level cloud: 11%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 25 / 47 mph 40 / 30°F 84% 999 mb
Low level cloud: 91%
Mid level cloud: 98%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 23 / 34 mph 43 / 34°F 80% 1003 mb
Low level cloud: 94%
Mid level cloud: 100%
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

SW
SW

 23 / 27 mph 46 / 38°F 81% 1005 mb
Low level cloud: 75%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 20 / 23 mph 47 / 40°F 78% 1006 mb
Low level cloud: 83%
Mid level cloud: 16%
High level cloud: 2%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 16 / 18 mph 46 / 39°F 83% 1007 mb
Low level cloud: 78%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 16 / 25 mph 44 / 37°F 87% 1007 mb
Low level cloud: 96%
Mid level cloud: 90%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Dec		00:00

SSW
SSW

 14 / 24 mph 43 / 36°F 89% 1006 mb
Low level cloud: 95%
Mid level cloud: 79%
High level cloud: 66%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 18 / 34 mph 42 / 34°F 90% 1005 mb
Low level cloud: 96%
Mid level cloud: 86%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 13 / 23 mph 42 / 35°F 89% 1003 mb
Low level cloud: 100%
Mid level cloud: 81%
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

SE
SE

 11 / 14 mph 43 / 37°F 89% 1003 mb
Low level cloud: 99%
Mid level cloud: 51%
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

ESE
ESE

 9 / 10 mph 45 / 40°F 89% 1002 mb
Low level cloud: 89%
Mid level cloud: 88%
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

 9 / 11 mph 46 / 41°F 86% 1000 mb
Low level cloud: 76%
Mid level cloud: 51%
High level cloud: 22%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 11 / 15 mph 45 / 39°F 88% 1000 mb
Low level cloud: 96%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 13 / 21 mph 44 / 37°F 86% 1001 mb
Low level cloud: 88%
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 21
Dec		00:00

E
E

 13 / 19 mph 43 / 36°F 88% 1001 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 92%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 11 / 17 mph 42 / 35°F 88% 1002 mb
Low level cloud: 84%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 16 / 27 mph 41 / 33°F 85% 1003 mb
Low level cloud: 87%
Mid level cloud: 93%
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

E
E

 16 / 24 mph 43 / 35°F 87% 1006 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

E
E

 15 / 21 mph 45 / 38°F 89% 1008 mb
Low level cloud: 88%
Mid level cloud: 99%
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

E
E

 11 / 13 mph 46 / 40°F 93% 1009 mb
Low level cloud: 78%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

 7 / 10 mph 45 / 41°F 96% 1011 mb
Low level cloud: 64%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
94%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

ENE
ENE

 8 / 13 mph 43 / 39°F 95% 1013 mb
Low level cloud: 88%
Mid level cloud: 80%
High level cloud: 87%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Dec		00:00

ENE
ENE

 10 / 15 mph 45 / 40°F 94% 1013 mb
Low level cloud: 76%
Mid level cloud: 48%
High level cloud: 64%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 13 / 20 mph 45 / 38°F 93% 1014 mb
Low level cloud: 85%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 16 / 25 mph 44 / 37°F 87% 1013 mb
Low level cloud: 21%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 19 / 28 mph 45 / 38°F 85% 1013 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

 19 / 26 mph 47 / 40°F 89% 1012 mb
Low level cloud: 96%
Mid level cloud: 100%
High level cloud: 59%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 19 / 24 mph 48 / 41°F 90% 1013 mb
Low level cloud: 95%
Mid level cloud: 27%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 16 / 22 mph 47 / 40°F 90% 1014 mb
Low level cloud: 92%
Mid level cloud: 33%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 15 / 22 mph 46 / 39°F 92% 1015 mb
Low level cloud: 94%
Mid level cloud: 31%
High level cloud: 6%
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
Tue 23
Dec		00:00

ENE
ENE

 6 / 11 mph 39 / 34°F 95% 1017 mb
Low level cloud: 20%
Mid level cloud: 21%
High level cloud: 90%
Most Significant Cloud Type: low
38%
0.0 In
06:00

NE
NE

 10 / 17 mph 43 / 38°F 82% 1024 mb
Low level cloud: 95%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
12:00

NNW
NNW

 2 / 3 mph 41 / 41°F 84% 1020 mb
Low level cloud: 82%
Mid level cloud: 65%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 5 / 8 mph 38 / 35°F 88% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: high
14%
0.0 In
Wed 24
Dec		00:00

ENE
ENE

 10 / 19 mph 40 / 34°F 88% 1029 mb
Low level cloud: 57%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: low
67%
0.0 In
06:00

NE
NE

 11 / 19 mph 42 / 36°F 74% 1032 mb
Low level cloud: 63%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: low
64%
0.0 In
12:00

NE
NE

 12 / 22 mph 44 / 38°F 85% 1029 mb
Low level cloud: 81%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: low
83%
0.0 In
18:00

ENE
ENE

 12 / 20 mph 41 / 34°F 77% 1027 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
16%
0.0 In
Thu 25
Dec		00:00

NNE
NNE

 9 / 16 mph 35 / 28°F 75% 1029 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
06:00

NE
NE

 8 / 17 mph 31 / 24°F 77% 1027 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
12:00

ENE
ENE

 13 / 23 mph 38 / 31°F 95% 1033 mb
Low level cloud: 92%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

 6 / 10 mph 36 / 31°F 91% 1029 mb
Low level cloud: 2%
Mid level cloud: 20%
High level cloud: 16%
Most Significant Cloud Type: medium
25%
0.0 In
Fri 26
Dec		00:00

ENE
ENE

 12 / 21 mph 37 / 30°F 85% 1036 mb
Low level cloud: 98%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
06:00

NE
NE

 5 / 10 mph 31 / 25°F 91% 1030 mb
Low level cloud: 37%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: low
43%
0.0 In
12:00

ENE
ENE

 14 / 26 mph 39 / 31°F 70% 1037 mb
Low level cloud: 29%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
18:00

NNE
NNE

 5 / 9 mph 36 / 32°F 89% 1030 mb
Low level cloud: 76%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
Sat 27
Dec		00:00

NE
NE

 12 / 23 mph 38 / 30°F 82% 1036 mb
Low level cloud: 56%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
06:00

NNE
NNE

 4 / 8 mph 32 / 29°F 93% 1028 mb
Low level cloud: 46%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: low
62%
0.0 In
12:00

NE
NE

 11 / 21 mph 41 / 34°F 78% 1034 mb
Low level cloud: 36%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
18:00

N
N

 2 / 4 mph 38 / 37°F 85% 1028 mb
Low level cloud: 33%
Mid level cloud: 15%
High level cloud: 20%
Most Significant Cloud Type: low
40%
0.0 In
Sun 28
Dec		00:00

NNE
NNE

 17 / 32 mph 42 / 34°F 72% 1032 mb
Low level cloud: 96%
Mid level cloud: 7%
High level cloud: 16%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNE
NNE

 3 / 6 mph 32 / 29°F 87% 1029 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

ENE
ENE

 12 / 22 mph 41 / 35°F 74% 1036 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
18:00

NNE
NNE

 4 / 7 mph 35 / 32°F 84% 1030 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Mon 29
Dec		00:00

NNE
NNE

 3 / 7 mph 34 / 30°F 87% 1037 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNE
NNE

 3 / 7 mph 31 / 27°F 83% 1032 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 22%
Most Significant Cloud Type: medium
12%
0.0 In
12:00

NNE
NNE

 1 / 2 mph 38 / 38°F 74% 1035 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
18:00

NE
NE

 4 / 7 mph 35 / 32°F 90% 1031 mb
Low level cloud: 15%
Mid level cloud: 28%
High level cloud: 13%
Most Significant Cloud Type: low
26%
0.0 In
Tue 30
Dec		00:00

N
N

 3 / 6 mph 32 / 29°F 85% 1035 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 22%
Most Significant Cloud Type: medium
23%
0.0 In
06:00

NNE
NNE

 5 / 11 mph 31 / 25°F 91% 1032 mb
Low level cloud: 14%
Mid level cloud: 26%
High level cloud: 2%
Most Significant Cloud Type: low
23%
0.0 In
12:00

NW
NW

 1 / 3 mph 36 / 36°F 67% 1035 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 25%
Most Significant Cloud Type: medium
11%
0.0 In
18:00

NNE
NNE

 7 / 12 mph 37 / 31°F 88% 1033 mb
Low level cloud: 98%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Wed 31
Dec		00:00

WNW
WNW

 2 / 4 mph 33 / 32°F 86% 1033 mb
Low level cloud: 42%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: low
56%
0.0 In
06:00

NNW
NNW

 7 / 14 mph 31 / 24°F 89% 1030 mb
Low level cloud: 24%
Mid level cloud: 41%
High level cloud: 32%
Most Significant Cloud Type: low
41%
0.0 In
12:00

NW
NW

 3 / 6 mph 40 / 39°F 88% 1028 mb
Low level cloud: 22%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
18:00

NNW
NNW

 7 / 13 mph 36 / 30°F 81% 1024 mb
Low level cloud: 79%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
79%
0.0 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