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Manchester 14 Day Long Range Forecast

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

Michigan, United States Of America

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

Reviewing the forecast for Manchester Over the next 14 days and the average daytime maximum temperature will be around 28°C, with a high for the two weeks of 33°C expected on the afternoon of Thursday 18th. The average minimum temperature will be 16°C, dipping to its lowest on the morning of Saturday 20th at 13°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. Predictions are Friday 26th will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 16
Sep		01:00

ENE
ENE

 5 / 10 mph 63 / 63°F 71% 1023 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
04:00

ENE
ENE

 5 / 11 mph 55 / 54°F 76% 1023 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
07:00

NE
NE

 6 / 12 mph 56 / 55°F 78% 1024 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
10:00

NE
NE

 8 / 9 mph 76 / 76°F 41% 1023 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
13:00

ENE
ENE

 6 / 7 mph 84 / 80°F 29% 1021 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
16:00

ENE
ENE

 4 / 4 mph 85 / 81°F 29% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 5 / 11 mph 74 / 76°F 49% 1020 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
22:00

ENE
ENE

 2 / 4 mph 69 / 69°F 72% 1020 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
Wed 17
Sep		19:00

SE
SE

 7 / 15 mph 74 / 76°F 52% 1016 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
22:00

S
S

 4 / 9 mph 69 / 69°F 66% 1017 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
Thu 18
Sep		01:00

WSW
WSW

 4 / 9 mph 64 / 64°F 68% 1017 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
04:00

W
W

 4 / 8 mph 62 / 62°F 68% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WNW
WNW

 3 / 7 mph 61 / 61°F 62% 1017 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
10:00

WSW
WSW

 2 / 2 mph 82 / 79°F 34% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 4 / 5 mph 90 / 87°F 29% 1016 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

 7 / 8 mph 92 / 88°F 25% 1014 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 0%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ENE
ENE

 4 / 8 mph 82 / 79°F 38% 1015 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 11%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 10 / 17 mph 69 / 69°F 67% 1017 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
Fri 19
Sep		01:00

NE
NE

 7 / 14 mph 61 / 61°F 93% 1018 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 7 / 13 mph 59 / 59°F 96% 1019 mb
Low level cloud: 9%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 6 / 12 mph 58 / 57°F 94% 1020 mb
Low level cloud: 10%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ENE
ENE

 9 / 11 mph 73 / 76°F 55% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 8 / 9 mph 82 / 80°F 42% 1019 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

E
E

 9 / 10 mph 83 / 81°F 39% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 9 / 16 mph 69 / 67°F 66% 1019 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ENE
ENE

 10 / 18 mph 61 / 61°F 68% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 12%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Sep		01:00

E
E

 8 / 16 mph 56 / 55°F 72% 1021 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 77%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 8 / 16 mph 56 / 54°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 79%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 8 / 15 mph 57 / 56°F 70% 1021 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 14 / 16 mph 71 / 69°F 43% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 12 / 14 mph 76 / 77°F 40% 1020 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 99%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 9 / 12 mph 72 / 76°F 50% 1018 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 51%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 7 / 15 mph 66 / 64°F 70% 1017 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 98%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 7 / 14 mph 60 / 60°F 92% 1018 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 21
Sep		01:00

ESE
ESE

 6 / 13 mph 59 / 59°F 94% 1017 mb
Low level cloud: 2%
Mid level cloud: 29%
High level cloud: 16%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 6 / 13 mph 59 / 60°F 97% 1016 mb
Low level cloud: 6%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: medium
36%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

S
S

 6 / 12 mph 61 / 61°F 95% 1015 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 33%
Most Significant Cloud Type: medium
23%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

S
S

 10 / 14 mph 72 / 70°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 50%
High level cloud: 49%
Most Significant Cloud Type: medium
51%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

SSW
SSW

 15 / 17 mph 79 / 80°F 57% 1014 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 15 / 17 mph 79 / 80°F 53% 1012 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 7%
Most Significant Cloud Type: medium
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 6 / 12 mph 69 / 67°F 78% 1013 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 16%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 9 / 18 mph 64 / 64°F 92% 1013 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 99%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Sep		01:00

SSW
SSW

 9 / 18 mph 65 / 65°F 91% 1012 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 27%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 10 / 18 mph 65 / 65°F 94% 1012 mb
Low level cloud: 24%
Mid level cloud: 10%
High level cloud: 16%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 9 / 17 mph 64 / 64°F 96% 1013 mb
Low level cloud: 18%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 15 / 17 mph 75 / 78°F 66% 1013 mb
Low level cloud: 1%
Mid level cloud: 19%
High level cloud: 17%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 15 / 17 mph 86 / 85°F 42% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 15 / 17 mph 88 / 87°F 38% 1010 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 6%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 11 / 22 mph 78 / 79°F 57% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 8%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 8 / 17 mph 72 / 76°F 68% 1012 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 13%
Most Significant Cloud Type: medium
7%
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
Sep		01:00

SW
SW

 6 / 13 mph 64 / 64°F 88% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
0.0 In
07:00

S
S

 9 / 18 mph 63 / 63°F 93% 1010 mb
Low level cloud: 1%
Mid level cloud: 30%
High level cloud: 33%
Most Significant Cloud Type: medium
34%
0.0 In
13:00

SSW
SSW

 14 / 29 mph 67 / 67°F 92% 1009 mb
Low level cloud: 66%
Mid level cloud: 46%
High level cloud: 87%
Most Significant Cloud Type: low
92%
0.0 In
19:00

WNW
WNW

 15 / 32 mph 71 / 71°F 39% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 24
Sep		01:00

WSW
WSW

 6 / 10 mph 67 / 67°F 96% 1017 mb
Low level cloud: 15%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
07:00

WSW
WSW

 17 / 28 mph 71 / 71°F 47% 1010 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
13:00

S
S

 15 / 26 mph 81 / 79°F 25% 1010 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 15%
Most Significant Cloud Type: medium
13%
0.0 In
19:00

WNW
WNW

 14 / 26 mph 72 / 75°F 38% 1014 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
Thu 25
Sep		01:00

SSE
SSE

 6 / 13 mph 64 / 64°F 97% 1012 mb
Low level cloud: 25%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.0 In
07:00

N
N

 6 / 13 mph 52 / 50°F 91% 1019 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

 14 / 30 mph 85 / 86°F 46% 1010 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
19:00

NNE
NNE

 7 / 14 mph 67 / 67°F 39% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Fri 26
Sep		01:00

SW
SW

 2 / 5 mph 71 / 71°F 85% 1009 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
0.1 In
07:00

NNE
NNE

 4 / 9 mph 56 / 56°F 61% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 3%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

WNW
WNW

 12 / 25 mph 74 / 76°F 43% 1009 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.3 In
19:00

SE
SE

 6 / 13 mph 70 / 70°F 53% 1016 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 2%
Most Significant Cloud Type: medium
1%
0.0 In
Sat 27
Sep		01:00

WNW
WNW

 9 / 18 mph 56 / 54°F 79% 1011 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
07:00

E
E

 5 / 11 mph 61 / 61°F 84% 1019 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

N
N

 11 / 24 mph 67 / 67°F 60% 1012 mb
Low level cloud: 87%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.0 In
19:00

E
E

 7 / 14 mph 69 / 69°F 60% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Sun 28
Sep		01:00

NNE
NNE

 6 / 12 mph 57 / 56°F 91% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

ENE
ENE

 7 / 15 mph 59 / 59°F 93% 1018 mb
Low level cloud: 6%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
11%
0.0 In
13:00

ENE
ENE

 5 / 10 mph 77 / 78°F 44% 1017 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
19:00

E
E

 12 / 23 mph 66 / 66°F 58% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 14%
Most Significant Cloud Type: medium
8%
0.0 In
Mon 29
Sep		01:00

ESE
ESE

 3 / 6 mph 64 / 64°F 83% 1018 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
07:00

ENE
ENE

 7 / 13 mph 59 / 58°F 96% 1017 mb
Low level cloud: 83%
Mid level cloud: 58%
High level cloud: 51%
Most Significant Cloud Type: low
100%
0.0 In
13:00

E
E

 9 / 19 mph 78 / 79°F 50% 1019 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
19:00

E
E

 7 / 15 mph 61 / 61°F 98% 1014 mb
Low level cloud: 97%
Mid level cloud: 41%
High level cloud: 38%
Most Significant Cloud Type: low
100%
0.1 In
Tue 30
Sep		01:00

E
E

 6 / 13 mph 63 / 63°F 90% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
07:00

N
N

 4 / 8 mph 62 / 62°F 96% 1013 mb
Low level cloud: 34%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
65%
0.0 In
13:00

ESE
ESE

 12 / 24 mph 80 / 81°F 52% 1020 mb
Low level cloud: 56%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
19:00

SSW
SSW

 6 / 12 mph 71 / 71°F 56% 1012 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
0.0 In
Wed 01
Oct		01:00

E
E

 6 / 12 mph 66 / 66°F 92% 1019 mb
Low level cloud: 8%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
07:00

SW
SW

 5 / 11 mph 62 / 62°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
0.0 In
13:00

E
E

 8 / 17 mph 81 / 82°F 51% 1018 mb
Low level cloud: 67%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
19:00

SE
SE

 8 / 17 mph 74 / 76°F 45% 1013 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
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