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Barrancos 14 Day Long Range Forecast

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

Portugal

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

For Barrancos in the coming two weeks the average daytime maximum temperature will be around 27°C, with a high for the two weeks of 32°C expected on the afternoon of Wednesday 8th. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Tuesday 7th at 7°C. The fortnight ahead will have mixed overhead conditions with some days dry and some seeing a significant amount of rain. The indicators are that Saturday 11th will have the most precipitation with an accumulation of around 1.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 05
May
15:00

WSW
WSW

12 / 14 mph 77 / 77°F 45% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

13 / 14 mph 72 / 76°F 55% 1014 mb
Low level cloud: 5%
Mid level cloud: 24%
High level cloud: 99%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

5 / 9 mph 57 / 56°F 88% 1016 mb
Low level cloud: 27%
Mid level cloud: 32%
High level cloud: 70%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May
00:00

W
W

3 / 3 mph 58 / 59°F 95% 1016 mb
Low level cloud: 97%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

5 / 6 mph 59 / 58°F 80% 1015 mb
Low level cloud: 77%
Mid level cloud: 3%
High level cloud: 22%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

4 / 5 mph 55 / 55°F 90% 1016 mb
Low level cloud: 92%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

4 / 5 mph 59 / 59°F 79% 1017 mb
Low level cloud: 88%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

6 / 7 mph 70 / 67°F 60% 1016 mb
Low level cloud: 45%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

7 / 8 mph 76 / 76°F 42% 1015 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

8 / 10 mph 73 / 75°F 44% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

5 / 11 mph 55 / 54°F 57% 1018 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
Tue 07
May
00:00

ENE
ENE

4 / 8 mph 51 / 50°F 72% 1018 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

2 / 3 mph 47 / 47°F 78% 1019 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

4 / 7 mph 46 / 45°F 75% 1019 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

5 / 6 mph 73 / 75°F 39% 1019 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

ENE
ENE

4 / 4 mph 83 / 78°F 26% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

4 / 4 mph 86 / 80°F 23% 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
18:00

N
N

7 / 10 mph 79 / 77°F 35% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

5 / 11 mph 60 / 60°F 45% 1018 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
Wed 08
May
00:00

E
E

6 / 12 mph 57 / 56°F 45% 1018 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
03:00

ENE
ENE

6 / 12 mph 56 / 54°F 52% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 26%
Most Significant Cloud Type: high
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

7 / 15 mph 56 / 55°F 54% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 77%
Most Significant Cloud Type: high
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

9 / 10 mph 78 / 76°F 32% 1017 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
12:00

E
E

9 / 11 mph 87 / 81°F 21% 1016 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
15:00

ENE
ENE

7 / 9 mph 89 / 83°F 19% 1014 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

6 / 10 mph 83 / 79°F 29% 1014 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
21:00

E
E

6 / 13 mph 62 / 62°F 43% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 15%
Most Significant Cloud Type: high
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 09
May
00:00

ESE
ESE

3 / 7 mph 59 / 59°F 47% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
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

E
E

4 / 8 mph 56 / 56°F 51% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 46%
Most Significant Cloud Type: high
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

4 / 9 mph 56 / 56°F 51% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

9 / 11 mph 78 / 75°F 23% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 76%
Most Significant Cloud Type: high
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

8 / 9 mph 82 / 78°F 21% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

6 / 7 mph 85 / 80°F 23% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 90%
Most Significant Cloud Type: high
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

4 / 7 mph 80 / 77°F 35% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

4 / 9 mph 65 / 65°F 37% 1014 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 76%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 10
May
00:00

ESE
ESE

4 / 9 mph 61 / 61°F 40% 1014 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 55%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

4 / 8 mph 59 / 59°F 38% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 92%
Most Significant Cloud Type: high
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

5 / 11 mph 58 / 57°F 37% 1012 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
09:00

SSW
SSW

6 / 6 mph 79 / 76°F 26% 1013 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

9 / 11 mph 88 / 82°F 20% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 86%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

8 / 9 mph 89 / 83°F 21% 1009 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 90%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

4 / 9 mph 75 / 76°F 44% 1009 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 61%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

3 / 7 mph 64 / 64°F 55% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 98%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 11
May
00:00

E
E

3 / 6 mph 57 / 58°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 5%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

4 / 9 mph 55 / 54°F 83% 1011 mb
Low level cloud: 0%
Mid level cloud: 5%
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

ESE
ESE

5 / 10 mph 53 / 52°F 74% 1011 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

4 / 4 mph 77 / 76°F 36% 1012 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
12:00

SSW
SSW

6 / 6 mph 87 / 81°F 24% 1011 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

11 / 12 mph 87 / 83°F 27% 1010 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 9%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

12 / 14 mph 78 / 78°F 45% 1010 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

4 / 7 mph 61 / 61°F 77% 1012 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
Sun 12
May
00:00

ENE
ENE

5 / 11 mph 64 / 64°F 41% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 2%
Most Significant Cloud Type: medium
43%
0.0 In
06:00

SSE
SSE

1 / 3 mph 64 / 64°F 51% 1011 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: medium
9%
0.0 In
12:00

WNW
WNW

5 / 5 mph 88 / 85°F 25% 1007 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

SSW
SSW

9 / 11 mph 87 / 87°F 36% 1008 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Mon 13
May
00:00

WNW
WNW

4 / 6 mph 56 / 56°F 79% 1010 mb
Low level cloud: 0%
Mid level cloud: 88%
High level cloud: 33%
Most Significant Cloud Type: medium
89%
0.0 In
06:00

SSW
SSW

1 / 1 mph 54 / 54°F 95% 1014 mb
Low level cloud: 57%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.0 In
12:00

WSW
WSW

8 / 9 mph 79 / 78°F 30% 1010 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
18:00

S
S

13 / 19 mph 77 / 78°F 45% 1006 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 32%
Most Significant Cloud Type: medium
11%
0.0 In
Tue 14
May
00:00

WNW
WNW

3 / 4 mph 57 / 57°F 83% 1010 mb
Low level cloud: 22%
Mid level cloud: 93%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

SE
SE

3 / 6 mph 51 / 50°F 95% 1010 mb
Low level cloud: 17%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
17%
0.0 In
12:00

WSW
WSW

9 / 10 mph 69 / 69°F 39% 1008 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
18:00

SSW
SSW

12 / 18 mph 70 / 70°F 42% 1007 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
0.0 In
Wed 15
May
00:00

SSW
SSW

3 / 5 mph 48 / 48°F 89% 1009 mb
Low level cloud: 15%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: low
30%
0.0 In
06:00

SSW
SSW

6 / 8 mph 58 / 58°F 81% 1011 mb
Low level cloud: 73%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
75%
0.0 In
12:00

SW
SW

10 / 13 mph 67 / 67°F 40% 1006 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
18:00

SSW
SSW

10 / 14 mph 71 / 71°F 50% 1010 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Thu 16
May
00:00

SW
SW

3 / 6 mph 49 / 48°F 93% 1008 mb
Low level cloud: 14%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
06:00

ESE
ESE

2 / 3 mph 50 / 50°F 94% 1014 mb
Low level cloud: 30%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.0 In
12:00

SW
SW

12 / 17 mph 61 / 61°F 63% 1006 mb
Low level cloud: 59%
Mid level cloud: 60%
High level cloud: 100%
Most Significant Cloud Type: low
92%
0.0 In
18:00

NNW
NNW

8 / 12 mph 69 / 69°F 51% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
Fri 17
May
00:00

SSE
SSE

6 / 11 mph 48 / 46°F 97% 1008 mb
Low level cloud: 97%
Mid level cloud: 15%
High level cloud: 10%
Most Significant Cloud Type: low
100%
0.3 In
06:00

NE
NE

1 / 1 mph 53 / 53°F 93% 1017 mb
Low level cloud: 13%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.0 In
12:00

W
W

6 / 12 mph 64 / 64°F 64% 1011 mb
Low level cloud: 68%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
77%
0.0 In
18:00

WNW
WNW

8 / 12 mph 75 / 76°F 33% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Sat 18
May
00:00

W
W

2 / 4 mph 50 / 50°F 95% 1016 mb
Low level cloud: 28%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.1 In
06:00

NW
NW

1 / 2 mph 51 / 51°F 91% 1015 mb
Low level cloud: 3%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
12:00

W
W

7 / 15 mph 69 / 69°F 37% 1015 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
0.0 In
18:00

W
W

4 / 7 mph 75 / 75°F 29% 1011 mb
Low level cloud: 0%
Mid level cloud: 69%
High level cloud: 11%
Most Significant Cloud Type: medium
69%
0.0 In
Sun 19
May
00:00

NW
NW

2 / 4 mph 48 / 49°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

NE
NE

1 / 1 mph 53 / 53°F 85% 1012 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 99%
Most Significant Cloud Type: medium
19%
0.0 In
12:00

WNW
WNW

7 / 14 mph 69 / 69°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
42%
0.0 In
18:00

SW
SW

9 / 13 mph 77 / 76°F 26% 1007 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: medium
15%
0.0 In
Mon 20
May
00:00

NW
NW

3 / 6 mph 50 / 50°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

S
S

3 / 4 mph 52 / 52°F 96% 1012 mb
Low level cloud: 58%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.0 In
12:00

WNW
WNW

6 / 12 mph 73 / 75°F 36% 1017 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.0 In
18:00

SSW
SSW

13 / 20 mph 71 / 71°F 36% 1012 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
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