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Jackson 14 Day Long Range Forecast

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

Michigan, United States Of America

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

Taking a look at Jackson over the coming two weeks and the average daytime maximum temperature will be around 29°C, with a high for the two weeks of 33°C expected on the afternoon of Thursday 18th. The mean minimum temperature will be 16°C, dipping to its lowest on the morning of Saturday 20th at 12°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. It looks like Friday 26th will have the most precipitation with an accumulation of around 7.0mm. On the whole winds are likely to be moderate.

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

E
E

 5 / 10 mph 60 / 60°F 82% 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

ESE
ESE

 6 / 12 mph 56 / 55°F 73% 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

ENE
ENE

 5 / 10 mph 56 / 55°F 75% 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

 7 / 9 mph 76 / 76°F 38% 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
13:00

ENE
ENE

 7 / 8 mph 85 / 80°F 24% 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

 3 / 4 mph 86 / 81°F 24% 1020 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
19:00

NE
NE

 5 / 10 mph 75 / 76°F 41% 1020 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
22:00

E
E

 4 / 9 mph 68 / 68°F 59% 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

ENE
ENE

 4 / 8 mph 79 / 77°F 34% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 7 / 15 mph 67 / 67°F 62% 1017 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
Thu 18
Sep		01:00

SW
SW

 5 / 10 mph 64 / 64°F 66% 1017 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
04:00

WSW
WSW

 4 / 9 mph 61 / 61°F 62% 1017 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
07:00

WNW
WNW

 3 / 6 mph 61 / 61°F 56% 1018 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 3 / 4 mph 83 / 80°F 39% 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
13:00

NW
NW

 7 / 8 mph 90 / 86°F 26% 1016 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

 9 / 10 mph 91 / 87°F 25% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 6 / 13 mph 81 / 79°F 39% 1015 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 9%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 10 / 19 mph 70 / 70°F 63% 1017 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 19
Sep		01:00

ENE
ENE

 7 / 14 mph 60 / 60°F 96% 1019 mb
Low level cloud: 7%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ENE
ENE

 7 / 14 mph 58 / 56°F 97% 1019 mb
Low level cloud: 11%
Mid level cloud: 5%
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

ENE
ENE

 6 / 13 mph 57 / 56°F 97% 1020 mb
Low level cloud: 21%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 9 / 11 mph 74 / 76°F 55% 1020 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
13:00

E
E

 7 / 9 mph 83 / 81°F 39% 1019 mb
Low level cloud: 0%
Mid level cloud: 12%
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

 7 / 9 mph 85 / 82°F 35% 1017 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 8 / 15 mph 74 / 76°F 54% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 10%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 9 / 18 mph 60 / 60°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 9%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 20
Sep		01:00

E
E

 5 / 11 mph 56 / 55°F 71% 1021 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

E
E

 7 / 14 mph 54 / 53°F 81% 1021 mb
Low level cloud: 0%
Mid level cloud: 41%
High level cloud: 94%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

E
E

 6 / 13 mph 55 / 54°F 81% 1021 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 97%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 12 / 13 mph 70 / 69°F 41% 1021 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

ESE
ESE

 13 / 15 mph 77 / 77°F 39% 1019 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 74%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 12 / 13 mph 75 / 76°F 44% 1018 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 14%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

ESE
ESE

 7 / 14 mph 65 / 64°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 46%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 6 mph 60 / 60°F 95% 1018 mb
Low level cloud: 3%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
59%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Sun 21
Sep		01:00

SE
SE

 7 / 14 mph 59 / 59°F 96% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 32%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 8 / 16 mph 59 / 59°F 97% 1016 mb
Low level cloud: 4%
Mid level cloud: 15%
High level cloud: 100%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 7 / 15 mph 61 / 61°F 95% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 21%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 11 / 14 mph 72 / 76°F 71% 1014 mb
Low level cloud: 0%
Mid level cloud: 49%
High level cloud: 64%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 16 / 18 mph 81 / 81°F 50% 1013 mb
Low level cloud: 40%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 15 / 17 mph 76 / 78°F 59% 1012 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 12%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 7 / 12 mph 69 / 67°F 81% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 12%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 11 / 22 mph 66 / 66°F 84% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 45%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 22
Sep		01:00

SSW
SSW

 11 / 20 mph 68 / 68°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 37%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 11 / 20 mph 67 / 67°F 88% 1011 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 14%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 11 / 19 mph 66 / 66°F 89% 1013 mb
Low level cloud: 4%
Mid level cloud: 25%
High level cloud: 20%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 16 / 18 mph 78 / 79°F 54% 1013 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 33%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

 15 / 17 mph 87 / 86°F 38% 1011 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 14 / 16 mph 89 / 88°F 35% 1010 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 1%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

 11 / 20 mph 80 / 80°F 52% 1011 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 9 / 19 mph 72 / 76°F 70% 1011 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 22%
Most Significant Cloud Type: medium
8%
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

SSW
SSW

 6 / 13 mph 63 / 63°F 92% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 55%
Most Significant Cloud Type: medium
48%
0.0 In
07:00

S
S

 11 / 22 mph 65 / 65°F 86% 1009 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 49%
Most Significant Cloud Type: medium
46%
0.0 In
13:00

SW
SW

 16 / 34 mph 72 / 76°F 85% 1009 mb
Low level cloud: 79%
Mid level cloud: 55%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
19:00

W
W

 14 / 29 mph 70 / 70°F 42% 1014 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

SW
SW

 6 / 10 mph 66 / 66°F 95% 1017 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
0.0 In
07:00

WSW
WSW

 16 / 28 mph 70 / 70°F 48% 1010 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
13:00

S
S

 18 / 31 mph 81 / 78°F 24% 1009 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 19%
Most Significant Cloud Type: medium
17%
0.0 In
19:00

WNW
WNW

 11 / 19 mph 71 / 71°F 43% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Thu 25
Sep		01:00

SSE
SSE

 7 / 14 mph 64 / 64°F 97% 1011 mb
Low level cloud: 20%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NE
NE

 5 / 11 mph 51 / 49°F 92% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
13:00

SSW
SSW

 16 / 32 mph 87 / 87°F 38% 1009 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 4%
Most Significant Cloud Type: medium
23%
0.0 In
19:00

NE
NE

 5 / 11 mph 69 / 69°F 38% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
Fri 26
Sep		01:00

N
N

 4 / 9 mph 66 / 66°F 90% 1010 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 99%
Most Significant Cloud Type: medium
35%
0.1 In
07:00

ENE
ENE

 3 / 5 mph 58 / 59°F 68% 1019 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

WNW
WNW

 12 / 24 mph 73 / 76°F 42% 1009 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.2 In
19:00

ESE
ESE

 6 / 12 mph 73 / 76°F 44% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
0.0 In
Sat 27
Sep		01:00

W
W

 7 / 15 mph 56 / 55°F 84% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
07:00

E
E

 5 / 11 mph 60 / 60°F 84% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
13:00

N
N

 12 / 25 mph 68 / 68°F 57% 1013 mb
Low level cloud: 92%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
94%
0.0 In
19:00

ESE
ESE

 7 / 14 mph 70 / 70°F 60% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Sun 28
Sep		01:00

NE
NE

 5 / 11 mph 57 / 56°F 89% 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 / 14 mph 59 / 58°F 92% 1018 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 1%
Most Significant Cloud Type: medium
17%
0.0 In
13:00

ENE
ENE

 4 / 9 mph 78 / 78°F 40% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

ESE
ESE

 12 / 21 mph 66 / 66°F 57% 1017 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
4%
0.0 In
Mon 29
Sep		01:00

SE
SE

 4 / 8 mph 63 / 63°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

E
E

 6 / 12 mph 56 / 55°F 98% 1017 mb
Low level cloud: 44%
Mid level cloud: 46%
High level cloud: 24%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ESE
ESE

 8 / 17 mph 79 / 80°F 44% 1019 mb
Low level cloud: 4%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
19:00

E
E

 7 / 13 mph 60 / 60°F 97% 1014 mb
Low level cloud: 84%
Mid level cloud: 54%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
Tue 30
Sep		01:00

ESE
ESE

 6 / 14 mph 63 / 63°F 89% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

NNW
NNW

 4 / 6 mph 60 / 60°F 98% 1013 mb
Low level cloud: 77%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

ESE
ESE

 11 / 24 mph 81 / 82°F 48% 1020 mb
Low level cloud: 48%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
19:00

S
S

 6 / 12 mph 73 / 76°F 52% 1011 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
Wed 01
Oct		01:00

ESE
ESE

 6 / 13 mph 65 / 65°F 90% 1019 mb
Low level cloud: 2%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
07:00

SSW
SSW

 5 / 11 mph 62 / 62°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: medium
84%
0.0 In
13:00

ENE
ENE

 7 / 15 mph 83 / 83°F 44% 1018 mb
Low level cloud: 11%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: medium
85%
0.0 In
19:00

SSE
SSE

 7 / 14 mph 77 / 78°F 42% 1012 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
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