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Barweiler 14 Day Long Range Forecast

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

Germany

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

Taking a look at Barweiler over the coming two weeks and the average daytime maximum temperature will be around 6°C, with a high for the two weeks of 9°C expected on the afternoon of Thursday 12th. The mean minimum temperature will be 2°C, dipping to its lowest on the morning of Sunday 15th at -2°C. Expect the next 14 days have some days seeing a little precipitation and some days with sleet or snow. The current forecast indicates Sunday 15th will have the most precipitation with an accumulation of around 16.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 05
Feb		19:00

ESE
ESE

 5 / 6 mph 40 / 37°F 91% 989 mb
Low level cloud: 56%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 4 / 5 mph 38 / 35°F 93% 989 mb
Low level cloud: 27%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 06
Feb		01:00

ESE
ESE

 3 / 5 mph 35 / 33°F 95% 989 mb
Low level cloud: 40%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

 3 / 6 mph 34 / 31°F 91% 989 mb
Low level cloud: 18%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 3 / 7 mph 33 / 30°F 87% 990 mb
Low level cloud: 6%
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
10:00

SSE
SSE

 4 / 6 mph 37 / 34°F 79% 992 mb
Low level cloud: 0%
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
13:00

SSE
SSE

 5 / 7 mph 40 / 37°F 81% 992 mb
Low level cloud: 86%
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
16:00

S
S

 5 / 7 mph 41 / 37°F 93% 994 mb
Low level cloud: 90%
Mid level cloud: 72%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 5 / 10 mph 39 / 35°F 97% 996 mb
Low level cloud: 78%
Mid level cloud: 50%
High level cloud: 5%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 6 / 13 mph 36 / 31°F 97% 998 mb
Low level cloud: 61%
Mid level cloud: 49%
High level cloud: 2%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 07
Feb		01:00

SW
SW

 6 / 12 mph 40 / 35°F 97% 1000 mb
Low level cloud: 74%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 5 / 10 mph 39 / 35°F 96% 1001 mb
Low level cloud: 84%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 4 / 9 mph 38 / 35°F 96% 1002 mb
Low level cloud: 60%
Mid level cloud: 68%
High level cloud: 12%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 6 / 7 mph 43 / 39°F 85% 1004 mb
Low level cloud: 4%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 8 / 11 mph 46 / 41°F 72% 1005 mb
Low level cloud: 16%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 5 / 6 mph 46 / 44°F 76% 1005 mb
Low level cloud: 23%
Mid level cloud: 18%
High level cloud: 22%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 4 / 5 mph 45 / 42°F 93% 1007 mb
Low level cloud: 14%
Mid level cloud: 41%
High level cloud: 14%
Most Significant Cloud Type: medium
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 4 / 6 mph 42 / 40°F 94% 1009 mb
Low level cloud: 17%
Mid level cloud: 20%
High level cloud: 16%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 08
Feb		01:00

SSW
SSW

 4 / 7 mph 41 / 38°F 94% 1009 mb
Low level cloud: 16%
Mid level cloud: 43%
High level cloud: 96%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 3 / 6 mph 39 / 37°F 91% 1009 mb
Low level cloud: 12%
Mid level cloud: 62%
High level cloud: 94%
Most Significant Cloud Type: medium
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 1 / 2 mph 39 / 39°F 91% 1009 mb
Low level cloud: 9%
Mid level cloud: 45%
High level cloud: 22%
Most Significant Cloud Type: medium
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 1 / 2 mph 43 / 42°F 85% 1010 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 87%
Most Significant Cloud Type: medium
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 2 / 2 mph 45 / 45°F 74% 1010 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 11%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 3 / 4 mph 46 / 45°F 77% 1010 mb
Low level cloud: 13%
Mid level cloud: 32%
High level cloud: 15%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 3 / 3 mph 45 / 44°F 93% 1011 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 10%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 2 / 3 mph 42 / 41°F 94% 1012 mb
Low level cloud: 39%
Mid level cloud: 33%
High level cloud: 11%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 09
Feb		01:00

SE
SE

 2 / 4 mph 37 / 35°F 96% 1012 mb
Low level cloud: 62%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 3 / 5 mph 36 / 34°F 92% 1011 mb
Low level cloud: 35%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SE
SE

 2 / 4 mph 35 / 33°F 92% 1011 mb
Low level cloud: 27%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

 3 / 4 mph 39 / 36°F 87% 1011 mb
Low level cloud: 47%
Mid level cloud: 36%
High level cloud: 9%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 5 / 6 mph 41 / 38°F 75% 1010 mb
Low level cloud: 61%
Mid level cloud: 31%
High level cloud: 11%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 5 / 7 mph 42 / 38°F 70% 1009 mb
Low level cloud: 47%
Mid level cloud: 29%
High level cloud: 13%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 5 / 6 mph 40 / 37°F 76% 1010 mb
Low level cloud: 54%
Mid level cloud: 27%
High level cloud: 3%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 4 / 4 mph 38 / 36°F 90% 1010 mb
Low level cloud: 3%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 10
Feb		01:00

SSE
SSE

 3 / 5 mph 34 / 31°F 92% 1009 mb
Low level cloud: 8%
Mid level cloud: 20%
High level cloud: 11%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 3 / 5 mph 32 / 30°F 93% 1008 mb
Low level cloud: 10%
Mid level cloud: 45%
High level cloud: 20%
Most Significant Cloud Type: medium
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 3 / 6 mph 32 / 29°F 93% 1007 mb
Low level cloud: 13%
Mid level cloud: 26%
High level cloud: 99%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 5 / 7 mph 35 / 31°F 78% 1005 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 35%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 8 / 11 mph 41 / 36°F 66% 1002 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 2%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 7 / 11 mph 42 / 37°F 69% 999 mb
Low level cloud: 1%
Mid level cloud: 100%
High level cloud: 15%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 8 / 12 mph 38 / 32°F 90% 997 mb
Low level cloud: 94%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 7 / 11 mph 38 / 32°F 96% 994 mb
Low level cloud: 92%
Mid level cloud: 73%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 11
Feb		01:00

SSE
SSE

 5 / 9 mph 38 / 34°F 97% 991 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

SSW
SSW

 8 / 14 mph 40 / 35°F 97% 989 mb
Low level cloud: 93%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 13 / 21 mph 46 / 40°F 93% 989 mb
Low level cloud: 92%
Mid level cloud: 51%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 15 / 23 mph 44 / 37°F 82% 991 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 1%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 14 / 21 mph 44 / 38°F 80% 992 mb
Low level cloud: 76%
Mid level cloud: 27%
High level cloud: 92%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 11 / 16 mph 44 / 38°F 84% 992 mb
Low level cloud: 80%
Mid level cloud: 54%
High level cloud: 43%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 12 / 19 mph 41 / 34°F 85% 995 mb
Low level cloud: 49%
Mid level cloud: 59%
High level cloud: 100%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WSW
WSW

 11 / 17 mph 41 / 34°F 83% 997 mb
Low level cloud: 82%
Mid level cloud: 91%
High level cloud: 64%
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
Thu 12
Feb		01:00

SW
SW

 12 / 19 mph 41 / 34°F 93% 988 mb
Low level cloud: 86%
Mid level cloud: 98%
High level cloud: 97%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

 8 / 11 mph 41 / 35°F 97% 996 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NNE
NNE

 13 / 17 mph 27 / 16°F 79% 1002 mb
Low level cloud: 47%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
93%
0.0 In
19:00

S
S

 5 / 6 mph 41 / 38°F 98% 996 mb
Low level cloud: 99%
Mid level cloud: 82%
High level cloud: 14%
Most Significant Cloud Type: low
100%
0.0 In
Fri 13
Feb		01:00

NNE
NNE

 2 / 4 mph 33 / 32°F 97% 1001 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
07:00

WSW
WSW

 3 / 4 mph 41 / 39°F 96% 993 mb
Low level cloud: 94%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

SSW
SSW

 15 / 21 mph 43 / 36°F 79% 999 mb
Low level cloud: 12%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: medium
93%
0.0 In
19:00

W
W

 13 / 21 mph 35 / 26°F 89% 997 mb
Low level cloud: 89%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Sat 14
Feb		01:00

NW
NW

 6 / 9 mph 40 / 36°F 97% 984 mb
Low level cloud: 94%
Mid level cloud: 96%
High level cloud: 90%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

 12 / 22 mph 29 / 19°F 82% 997 mb
Low level cloud: 68%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
13:00

S
S

 1 / 2 mph 42 / 42°F 97% 990 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 37%
Most Significant Cloud Type: low
100%
0.2 In
19:00

WNW
WNW

 12 / 21 mph 33 / 24°F 90% 1004 mb
Low level cloud: 75%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.1 In
Sun 15
Feb		01:00

NNE
NNE

 4 / 8 mph 31 / 27°F 98% 992 mb
Low level cloud: 93%
Mid level cloud: 69%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
07:00

NW
NW

 6 / 11 mph 27 / 20°F 91% 1012 mb
Low level cloud: 78%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.0 In
13:00

N
N

 10 / 17 mph 34 / 26°F 96% 995 mb
Low level cloud: 78%
Mid level cloud: 100%
High level cloud: 34%
Most Significant Cloud Type: low
100%
0.6 In
19:00

NE
NE

 1 / 2 mph 39 / 39°F 85% 1017 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 7%
Most Significant Cloud Type: medium
10%
0.0 In
Mon 16
Feb		01:00

W
W

 4 / 9 mph 22 / 15°F 91% 1009 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: medium
3%
0.1 In
07:00

NNW
NNW

 1 / 2 mph 27 / 27°F 87% 1017 mb
Low level cloud: 26%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.0 In
13:00

SSW
SSW

 15 / 26 mph 31 / 20°F 94% 1005 mb
Low level cloud: 91%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

NE
NE

 4 / 6 mph 29 / 26°F 91% 1014 mb
Low level cloud: 49%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
Tue 17
Feb		01:00

SSW
SSW

 5 / 9 mph 24 / 17°F 99% 1004 mb
Low level cloud: 64%
Mid level cloud: 44%
High level cloud: 92%
Most Significant Cloud Type: low
90%
0.2 In
07:00

NNE
NNE

 8 / 15 mph 18 / 8°F 88% 1010 mb
Low level cloud: 37%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
38%
0.0 In
13:00

SSW
SSW

 13 / 22 mph 35 / 27°F 99% 990 mb
Low level cloud: 92%
Mid level cloud: 77%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.4 In
19:00

NNE
NNE

 12 / 21 mph 22 / 10°F 72% 1010 mb
Low level cloud: 8%
Mid level cloud: 98%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 18
Feb		01:00

SW
SW

 6 / 11 mph 35 / 29°F 100% 987 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.1 In
07:00

NNE
NNE

 10 / 18 mph 17 / 6°F 89% 1016 mb
Low level cloud: 97%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

NNW
NNW

 15 / 26 mph 27 / 15°F 93% 1009 mb
Low level cloud: 88%
Mid level cloud: 83%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
19:00

NE
NE

 4 / 8 mph 28 / 23°F 78% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 19
Feb		01:00

WNW
WNW

 1 / 2 mph 23 / 23°F 99% 1028 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
07:00

ESE
ESE

 2 / 3 mph 22 / 22°F 97% 1026 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
0.0 In
13:00

SSE
SSE

 7 / 12 mph 34 / 28°F 77% 1031 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 6%
Most Significant Cloud Type: medium
14%
0.0 In
19:00

SSE
SSE

 4 / 8 mph 30 / 26°F 68% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Fri 20
Feb		01:00

S
S

 6 / 11 mph 31 / 24°F 86% 1029 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 83%
Most Significant Cloud Type: medium
12%
0.0 In
07:00

S
S

 4 / 7 mph 27 / 22°F 78% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SSW
SSW

 10 / 18 mph 36 / 29°F 82% 1027 mb
Low level cloud: 1%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
0.0 In
19:00

SSW
SSW

 5 / 9 mph 35 / 30°F 76% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
2%
0.0 In

Other Locations Near to Barweiler

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