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Greenfield 14 Day Long Range Forecast

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

Missouri, United States Of America

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

Taking a look at Greenfield over the coming two weeks and the average daytime maximum temperature will be around 27°C, with a high for the two weeks of 31°C expected on the afternoon of Sunday 19th. The mean minimum temperature will be 16°C, dipping to its lowest on the morning of Thursday 23rd at 8°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The indicators are that Sunday 26th will have the most precipitation with an accumulation of around 21.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May
15:00

WSW
WSW

3 / 4 mph 79 / 78°F 59% 1007 mb
Low level cloud: 17%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

3 / 4 mph 78 / 78°F 73% 1006 mb
Low level cloud: 8%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

6 / 14 mph 64 / 64°F 87% 1008 mb
Low level cloud: 4%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

S
S

7 / 14 mph 62 / 62°F 92% 1008 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
03:00

S
S

6 / 13 mph 60 / 60°F 91% 1008 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

5 / 11 mph 61 / 61°F 91% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

4 / 5 mph 74 / 76°F 75% 1011 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
12:00

SW
SW

4 / 5 mph 80 / 80°F 63% 1011 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
15:00

W
W

4 / 5 mph 82 / 82°F 58% 1011 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

1 / 1 mph 83 / 83°F 72% 1011 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
21:00

SE
SE

4 / 10 mph 69 / 69°F 79% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

SSE
SSE

4 / 9 mph 66 / 66°F 83% 1014 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
03:00

SSE
SSE

6 / 13 mph 63 / 63°F 88% 1014 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
06:00

SE
SE

6 / 13 mph 63 / 64°F 89% 1015 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
09:00

SSE
SSE

10 / 13 mph 77 / 78°F 75% 1014 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
12:00

S
S

12 / 15 mph 83 / 84°F 60% 1013 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
15:00

S
S

9 / 11 mph 87 / 89°F 57% 1010 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

8 / 15 mph 82 / 84°F 78% 1008 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

10 / 20 mph 71 / 71°F 77% 1010 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 95%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

W
W

2 / 5 mph 68 / 68°F 87% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SSW
SSW

23 / 42 mph 67 / 67°F 87% 1009 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

21 / 44 mph 64 / 64°F 88% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

S
S

16 / 28 mph 73 / 76°F 78% 1009 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 14%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

16 / 21 mph 84 / 86°F 66% 1009 mb
Low level cloud: 1%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

15 / 20 mph 86 / 91°F 69% 1007 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

13 / 25 mph 81 / 84°F 75% 1006 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

11 / 22 mph 74 / 77°F 80% 1007 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 14%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

S
S

14 / 26 mph 72 / 76°F 78% 1006 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
03:00

S
S

14 / 28 mph 70 / 70°F 80% 1005 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

S
S

17 / 33 mph 71 / 71°F 79% 1005 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

22 / 30 mph 78 / 80°F 76% 1004 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

23 / 30 mph 83 / 85°F 68% 1003 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

20 / 28 mph 84 / 89°F 71% 1003 mb
Low level cloud: 13%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

22 / 46 mph 77 / 80°F 88% 1002 mb
Low level cloud: 8%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
67%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
21:00

SSW
SSW

18 / 31 mph 73 / 77°F 89% 1003 mb
Low level cloud: 14%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

SSW
SSW

8 / 16 mph 70 / 70°F 95% 1003 mb
Low level cloud: 24%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SE
SE

7 / 12 mph 69 / 69°F 98% 1003 mb
Low level cloud: 74%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

S
S

13 / 22 mph 73 / 77°F 94% 1003 mb
Low level cloud: 97%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

17 / 26 mph 77 / 80°F 90% 1004 mb
Low level cloud: 84%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

19 / 23 mph 79 / 81°F 80% 1005 mb
Low level cloud: 66%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

14 / 18 mph 66 / 65°F 84% 1010 mb
Low level cloud: 92%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

13 / 19 mph 65 / 64°F 81% 1010 mb
Low level cloud: 75%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

8 / 16 mph 58 / 57°F 80% 1014 mb
Low level cloud: 53%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

NNW
NNW

13 / 21 mph 53 / 49°F 91% 1016 mb
Low level cloud: 12%
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
03:00

N
N

8 / 15 mph 48 / 44°F 97% 1016 mb
Low level cloud: 29%
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
06:00

NNW
NNW

5 / 9 mph 49 / 46°F 96% 1018 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

10 / 11 mph 60 / 57°F 77% 1019 mb
Low level cloud: 27%
Mid level cloud: 3%
High level cloud: 5%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

8 / 9 mph 68 / 66°F 66% 1019 mb
Low level cloud: 1%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

6 / 7 mph 72 / 69°F 60% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

3 / 4 mph 72 / 69°F 73% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

6 / 14 mph 59 / 58°F 83% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May
00:00

SSE
SSE

12 / 26 mph 66 / 66°F 96% 1015 mb
Low level cloud: 19%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
06:00

S
S

11 / 23 mph 65 / 65°F 96% 1007 mb
Low level cloud: 48%
Mid level cloud: 45%
High level cloud: 31%
Most Significant Cloud Type: low
67%
0.0 In
12:00

SW
SW

22 / 46 mph 82 / 89°F 75% 1003 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
18:00

SW
SW

9 / 18 mph 76 / 81°F 92% 1007 mb
Low level cloud: 49%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: low
68%
0.0 In
Sat 25
May
00:00

S
S

21 / 45 mph 77 / 80°F 74% 1005 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
06:00

W
W

4 / 9 mph 67 / 67°F 95% 1008 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
48%
0.0 In
12:00

SSW
SSW

21 / 44 mph 83 / 89°F 71% 1008 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

S
S

17 / 36 mph 81 / 85°F 73% 1006 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: medium
45%
0.0 In
Sun 26
May
00:00

SSW
SSW

15 / 32 mph 75 / 78°F 66% 1007 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

SSW
SSW

15 / 31 mph 70 / 70°F 88% 1009 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 14%
Most Significant Cloud Type: low
20%
0.1 In
12:00

SSW
SSW

20 / 42 mph 83 / 89°F 72% 1008 mb
Low level cloud: 14%
Mid level cloud: 10%
High level cloud: 75%
Most Significant Cloud Type: low
26%
0.1 In
18:00

WSW
WSW

9 / 20 mph 73 / 77°F 92% 1007 mb
Low level cloud: 36%
Mid level cloud: 53%
High level cloud: 16%
Most Significant Cloud Type: low
56%
0.4 In
Mon 27
May
00:00

WNW
WNW

9 / 19 mph 70 / 70°F 91% 1011 mb
Low level cloud: 6%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
63%
0.1 In
06:00

SSE
SSE

9 / 19 mph 63 / 63°F 92% 1013 mb
Low level cloud: 9%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
69%
0.7 In
12:00

SW
SW

13 / 28 mph 77 / 81°F 82% 1011 mb
Low level cloud: 84%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.1 In
18:00

NNE
NNE

9 / 18 mph 71 / 71°F 93% 1012 mb
Low level cloud: 61%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.1 In
Tue 28
May
00:00

NNE
NNE

7 / 14 mph 61 / 62°F 99% 1015 mb
Low level cloud: 99%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.4 In
06:00

SW
SW

12 / 24 mph 64 / 64°F 98% 1014 mb
Low level cloud: 95%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.5 In
12:00

NNE
NNE

11 / 23 mph 63 / 63°F 98% 1017 mb
Low level cloud: 98%
Mid level cloud: 70%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.4 In
18:00

NE
NE

11 / 24 mph 70 / 70°F 91% 1013 mb
Low level cloud: 42%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.2 In
Wed 29
May
00:00

N
N

12 / 26 mph 58 / 55°F 96% 1021 mb
Low level cloud: 99%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
06:00

NNE
NNE

8 / 17 mph 61 / 61°F 98% 1015 mb
Low level cloud: 99%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

NNE
NNE

9 / 19 mph 66 / 66°F 67% 1023 mb
Low level cloud: 64%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
18:00

NNW
NNW

11 / 22 mph 66 / 66°F 85% 1017 mb
Low level cloud: 46%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
49%
0.0 In
Thu 30
May
00:00

ESE
ESE

8 / 17 mph 56 / 54°F 92% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

WNW
WNW

7 / 15 mph 55 / 53°F 96% 1019 mb
Low level cloud: 18%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
20%
0.0 In
12:00

SE
SE

12 / 24 mph 71 / 71°F 62% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
18:00

NW
NW

7 / 16 mph 68 / 68°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Fri 31
May
00:00

SSE
SSE

11 / 24 mph 59 / 59°F 77% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

W
W

7 / 16 mph 56 / 54°F 88% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
12:00

SE
SE

13 / 27 mph 72 / 72°F 67% 1021 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 99%
Most Significant Cloud Type: medium
42%
0.0 In
18:00

NNE
NNE

10 / 21 mph 67 / 67°F 84% 1018 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.1 In
Sat 01
Jun
00:00

SSE
SSE

11 / 24 mph 63 / 63°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
0.0 In
06:00

NNE
NNE

5 / 11 mph 50 / 48°F 90% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

SSE
SSE

16 / 33 mph 75 / 79°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 11%
Most Significant Cloud Type: medium
12%
0.1 In
18:00

N
N

6 / 14 mph 65 / 65°F 75% 1023 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
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