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Grand Rapids 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Grand Rapids

Minnesota, United States Of America

Long range weather outlook for Grand Rapids includes 14 day forecast summary:

For Grand Rapids in the coming two weeks the average daytime maximum temperature will be around 17°C, with a high for the two weeks of 25°C expected on the afternoon of Sunday 26th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Saturday 25th at 4°C. Expect the next 14 days have some days seeing a little precipitation and some days with rain. It looks like Friday 24th will have the most precipitation with an accumulation of around 36.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 19
May		00:00

WSW
WSW

 6 / 13 mph 47 / 43°F 80% 1012 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
03:00

SW
SW

 6 / 12 mph 45 / 42°F 81% 1013 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

SW
SW

 6 / 12 mph 49 / 45°F 71% 1014 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
09:00

W
W

 8 / 9 mph 64 / 62°F 46% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 28%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 8 / 11 mph 65 / 63°F 49% 1014 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 5 / 5 mph 70 / 68°F 34% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 45%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 4 / 9 mph 62 / 60°F 62% 1011 mb
Low level cloud: 0%
Mid level cloud: 80%
High level cloud: 32%
Most Significant Cloud Type: medium
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 8 / 15 mph 58 / 56°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 57%
High level cloud: 88%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		15:00

NNW
NNW

 10 / 13 mph 58 / 55°F 88% 1009 mb
Low level cloud: 76%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 8 / 11 mph 58 / 55°F 78% 1011 mb
Low level cloud: 51%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 5 / 9 mph 51 / 50°F 92% 1013 mb
Low level cloud: 56%
Mid level cloud: 17%
High level cloud: 33%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		00:00

NE
NE

 3 / 7 mph 47 / 46°F 96% 1013 mb
Low level cloud: 1%
Mid level cloud: 29%
High level cloud: 8%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

 4 / 9 mph 45 / 43°F 95% 1013 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 20%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 7 / 11 mph 49 / 45°F 85% 1012 mb
Low level cloud: 2%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 9 / 13 mph 49 / 45°F 95% 1009 mb
Low level cloud: 56%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
95%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

NE
NE

 13 / 19 mph 49 / 44°F 97% 1007 mb
Low level cloud: 87%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
15:00

NE
NE

 17 / 26 mph 48 / 41°F 95% 1003 mb
Low level cloud: 93%
Mid level cloud: 92%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
18:00

NNE
NNE

 15 / 23 mph 46 / 39°F 96% 1001 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 87%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
21:00

N
N

 18 / 28 mph 45 / 38°F 95% 1000 mb
Low level cloud: 93%
Mid level cloud: 98%
High level cloud: 61%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Wed 22
May		00:00

N
N

 14 / 21 mph 44 / 37°F 97% 1001 mb
Low level cloud: 99%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

NNW
NNW

 13 / 19 mph 46 / 40°F 96% 1003 mb
Low level cloud: 100%
Mid level cloud: 93%
High level cloud: 96%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

N
N

 13 / 21 mph 47 / 41°F 94% 1005 mb
Low level cloud: 51%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 13 / 15 mph 57 / 53°F 66% 1005 mb
Low level cloud: 57%
Mid level cloud: 24%
High level cloud: 2%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 9 / 13 mph 59 / 55°F 72% 1006 mb
Low level cloud: 24%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 10 / 13 mph 65 / 64°F 51% 1006 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
18:00

WNW
WNW

 9 / 17 mph 57 / 53°F 86% 1007 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: medium
44%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

W
W

 5 / 11 mph 49 / 47°F 97% 1010 mb
Low level cloud: 5%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Thu 23
May		00:00

N
N

 3 / 7 mph 46 / 45°F 98% 1011 mb
Low level cloud: 40%
Mid level cloud: 21%
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

E
E

 4 / 8 mph 41 / 39°F 97% 1014 mb
Low level cloud: 15%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

 2 / 3 mph 44 / 43°F 95% 1015 mb
Low level cloud: 48%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 3 / 3 mph 56 / 54°F 75% 1015 mb
Low level cloud: 35%
Mid level cloud: 11%
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

W
W

 2 / 3 mph 68 / 65°F 51% 1014 mb
Low level cloud: 13%
Mid level cloud: 30%
High level cloud: 27%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 3 / 3 mph 69 / 66°F 50% 1012 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 4 / 9 mph 60 / 58°F 82% 1012 mb
Low level cloud: 1%
Mid level cloud: 39%
High level cloud: 61%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 9 / 17 mph 55 / 52°F 90% 1010 mb
Low level cloud: 1%
Mid level cloud: 29%
High level cloud: 82%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

SSE
SSE

 11 / 20 mph 53 / 49°F 89% 1011 mb
Low level cloud: 2%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 13 / 21 mph 55 / 51°F 83% 1007 mb
Low level cloud: 2%
Mid level cloud: 3%
High level cloud: 34%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 15 / 23 mph 55 / 50°F 84% 1006 mb
Low level cloud: 48%
Mid level cloud: 95%
High level cloud: 77%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 13 / 21 mph 53 / 49°F 98% 1003 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.5 In of precipitation over the past 3 hours.
0.5 In
12:00

S
S

 11 / 16 mph 53 / 50°F 98% 1002 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.6 In of precipitation over the past 3 hours.
0.6 In
15:00

W
W

 11 / 15 mph 51 / 47°F 95% 1004 mb
Low level cloud: 95%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
18:00

WNW
WNW

 9 / 12 mph 50 / 46°F 88% 1006 mb
Low level cloud: 46%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

 2 / 3 mph 49 / 50°F 83% 1008 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
Sat 25
May		00:00

WSW
WSW

 4 / 8 mph 41 / 39°F 94% 1009 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 4 / 10 mph 40 / 36°F 96% 1009 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 11%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 5 / 9 mph 45 / 41°F 90% 1009 mb
Low level cloud: 10%
Mid level cloud: 11%
High level cloud: 89%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 10 / 11 mph 60 / 56°F 60% 1007 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 11 / 14 mph 60 / 60°F 67% 1006 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: medium
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 12 / 16 mph 62 / 62°F 62% 1005 mb
Low level cloud: 4%
Mid level cloud: 86%
High level cloud: 87%
Most Significant Cloud Type: medium
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 12 / 19 mph 62 / 61°F 70% 1004 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 5 / 11 mph 53 / 52°F 97% 1005 mb
Low level cloud: 7%
Mid level cloud: 24%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May		00:00

W
W

 12 / 25 mph 46 / 40°F 80% 1006 mb
Low level cloud: 79%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
81%
0.0 In
06:00

WNW
WNW

 9 / 20 mph 42 / 36°F 85% 1014 mb
Low level cloud: 88%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
12:00

N
N

 6 / 12 mph 61 / 61°F 35% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

WSW
WSW

 10 / 21 mph 53 / 50°F 78% 1010 mb
Low level cloud: 85%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Mon 27
May		00:00

ENE
ENE

 10 / 21 mph 50 / 46°F 99% 1002 mb
Low level cloud: 98%
Mid level cloud: 90%
High level cloud: 88%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ESE
ESE

 3 / 6 mph 51 / 51°F 75% 1019 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 5%
Most Significant Cloud Type: medium
11%
0.0 In
12:00

WNW
WNW

 4 / 9 mph 66 / 66°F 42% 1020 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 0%
Most Significant Cloud Type: medium
54%
0.0 In
18:00

N
N

 8 / 17 mph 70 / 70°F 60% 1013 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 92%
Most Significant Cloud Type: medium
25%
0.0 In
Tue 28
May		00:00

WNW
WNW

 1 / 2 mph 52 / 51°F 82% 1023 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
06:00

NNE
NNE

 3 / 7 mph 51 / 51°F 71% 1019 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 12%
Most Significant Cloud Type: medium
43%
0.0 In
12:00

WNW
WNW

 3 / 6 mph 71 / 71°F 37% 1024 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 15%
Most Significant Cloud Type: medium
13%
0.0 In
18:00

NNW
NNW

 3 / 7 mph 56 / 56°F 87% 1020 mb
Low level cloud: 1%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: medium
93%
0.0 In
Wed 29
May		00:00

WSW
WSW

 3 / 6 mph 55 / 56°F 71% 1024 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
0.0 In
06:00

NNE
NNE

 6 / 12 mph 51 / 49°F 95% 1024 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 24%
Most Significant Cloud Type: medium
13%
0.0 In
12:00

W
W

 3 / 6 mph 74 / 76°F 38% 1023 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
18:00

N
N

 6 / 12 mph 64 / 64°F 52% 1023 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Thu 30
May		00:00

WSW
WSW

 2 / 5 mph 56 / 57°F 82% 1023 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: medium
8%
0.0 In
06:00

WNW
WNW

 4 / 8 mph 50 / 49°F 75% 1025 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

S
S

 6 / 12 mph 75 / 76°F 37% 1021 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
18:00

WNW
WNW

 7 / 15 mph 68 / 68°F 57% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 3%
Most Significant Cloud Type: medium
17%
0.0 In
Fri 31
May		00:00

S
S

 5 / 10 mph 55 / 54°F 88% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

W
W

 7 / 14 mph 56 / 55°F 78% 1017 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 13%
Most Significant Cloud Type: medium
18%
0.0 In
12:00

S
S

 11 / 23 mph 73 / 76°F 41% 1018 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.0 In
18:00

W
W

 7 / 15 mph 74 / 77°F 61% 1013 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
Sat 01
Jun		00:00

SE
SE

 6 / 13 mph 56 / 55°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
06:00

SW
SW

 5 / 11 mph 58 / 57°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
12:00

S
S

 10 / 19 mph 61 / 61°F 84% 1016 mb
Low level cloud: 58%
Mid level cloud: 53%
High level cloud: 98%
Most Significant Cloud Type: low
87%
0.0 In
18:00

SW
SW

 8 / 17 mph 73 / 77°F 59% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 02
Jun		00:00

SE
SE

 5 / 9 mph 57 / 56°F 98% 1015 mb
Low level cloud: 33%
Mid level cloud: 24%
High level cloud: 31%
Most Significant Cloud Type: low
45%
0.1 In
06:00

SSE
SSE

 6 / 12 mph 57 / 56°F 86% 1014 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

 8 / 16 mph 75 / 77°F 57% 1012 mb
Low level cloud: 12%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
78%
0.1 In
18:00

SSE
SSE

 11 / 24 mph 71 / 71°F 64% 1011 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 51%
Most Significant Cloud Type: medium
3%
0.0 In
Mon 03
Jun		00:00

SSE
SSE

 4 / 8 mph 59 / 59°F 97% 1011 mb
Low level cloud: 6%
Mid level cloud: 41%
High level cloud: 37%
Most Significant Cloud Type: medium
59%
0.0 In
06:00

ESE
ESE

 9 / 18 mph 58 / 56°F 92% 1009 mb
Low level cloud: 74%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

 5 / 10 mph 59 / 58°F 99% 1011 mb
Low level cloud: 92%
Mid level cloud: 74%
High level cloud: 81%
Most Significant Cloud Type: low
100%
0.3 In
18:00

E
E

 6 / 13 mph 65 / 65°F 99% 1005 mb
Low level cloud: 100%
Mid level cloud: 75%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.3 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