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Manchester 14 Day Long Range Forecast

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

Kentucky, 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 32°C expected on the afternoon of Monday 3rd. The average minimum temperature will be 12°C, dipping to its lowest on the morning of Friday 31st at 6°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Tuesday 4th will have the most precipitation with an accumulation of around 27.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May		01:00

SSW
SSW

 3 / 6 mph 62 / 62°F 98% 1012 mb
Low level cloud: 15%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SE
SE

 3 / 6 mph 60 / 60°F 97% 1012 mb
Low level cloud: 4%
Mid level cloud: 8%
High level cloud: 2%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 3 / 6 mph 67 / 64°F 96% 1012 mb
Low level cloud: 3%
Mid level cloud: 9%
High level cloud: 8%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 8 / 10 mph 84 / 85°F 68% 1011 mb
Low level cloud: 8%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 8 / 17 mph 72 / 69°F 94% 1011 mb
Low level cloud: 8%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SSW
SSW

 4 / 6 mph 76 / 77°F 93% 1010 mb
Low level cloud: 45%
Mid level cloud: 45%
High level cloud: 93%
Most Significant Cloud Type: low
71%
Expect 0.7 In of precipitation over the past 3 hours.
0.7 In
19:00

SSW
SSW

 12 / 18 mph 75 / 77°F 71% 1008 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 10 / 21 mph 70 / 69°F 74% 1007 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 3%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May		19:00

WNW
WNW

 9 / 13 mph 73 / 76°F 75% 1011 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

W
W

 4 / 9 mph 60 / 60°F 95% 1014 mb
Low level cloud: 1%
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 28
May		01:00

WSW
WSW

 4 / 7 mph 55 / 55°F 97% 1014 mb
Low level cloud: 1%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 5 / 10 mph 53 / 52°F 98% 1015 mb
Low level cloud: 13%
Mid level cloud: 13%
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

SW
SW

 6 / 8 mph 64 / 62°F 92% 1016 mb
Low level cloud: 19%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

W
W

 11 / 13 mph 78 / 78°F 46% 1016 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 14 / 16 mph 81 / 80°F 43% 1016 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 13 / 15 mph 80 / 79°F 44% 1016 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 7 / 15 mph 66 / 64°F 76% 1016 mb
Low level cloud: 3%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

WNW
WNW

 3 / 6 mph 55 / 55°F 96% 1018 mb
Low level cloud: 27%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May		01:00

SW
SW

 3 / 6 mph 52 / 53°F 96% 1018 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
04:00

WSW
WSW

 3 / 6 mph 50 / 50°F 98% 1018 mb
Low level cloud: 9%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 4 / 5 mph 58 / 56°F 96% 1020 mb
Low level cloud: 22%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 9 / 11 mph 75 / 76°F 59% 1020 mb
Low level cloud: 48%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 13 / 14 mph 79 / 78°F 40% 1018 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 11 / 13 mph 77 / 77°F 44% 1018 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 5 / 11 mph 63 / 60°F 68% 1018 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 11%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

 2 / 3 mph 54 / 54°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 13%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May		01:00

NNE
NNE

 2 / 3 mph 50 / 50°F 92% 1019 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 1 / 1 mph 48 / 48°F 95% 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
07:00

NE
NE

 0 / 1 mph 58 / 56°F 83% 1021 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
10:00

N
N

 3 / 3 mph 75 / 76°F 52% 1020 mb
Low level cloud: 19%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

 4 / 4 mph 81 / 78°F 38% 1018 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

 8 / 9 mph 80 / 78°F 40% 1016 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 8 / 10 mph 67 / 65°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 3 / 6 mph 51 / 51°F 93% 1020 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
Fri 31
May		01:00

NE
NE

 3 / 6 mph 48 / 48°F 97% 1020 mb
Low level cloud: 4%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NE
NE

 4 / 9 mph 44 / 41°F 98% 1020 mb
Low level cloud: 5%
Mid level cloud: 0%
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

NE
NE

 6 / 7 mph 54 / 50°F 89% 1023 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 8 / 9 mph 70 / 68°F 49% 1022 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

NE
NE

 9 / 10 mph 77 / 75°F 30% 1021 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
16:00

NE
NE

 8 / 9 mph 79 / 76°F 28% 1019 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
19:00

NE
NE

 5 / 10 mph 63 / 60°F 62% 1021 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
22:00

NE
NE

 4 / 9 mph 52 / 51°F 70% 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
Sat 01
Jun		01:00

ENE
ENE

 4 / 9 mph 49 / 47°F 69% 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

 4 / 9 mph 46 / 44°F 72% 1022 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

E
E

 2 / 5 mph 53 / 52°F 65% 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
10:00

ESE
ESE

 2 / 2 mph 77 / 76°F 41% 1022 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

WNW
WNW

 3 / 3 mph 86 / 81°F 33% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 4 / 4 mph 85 / 81°F 36% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 30%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 0 / 1 mph 69 / 65°F 66% 1020 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
22:00

ESE
ESE

 2 / 4 mph 59 / 59°F 66% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 20%
Most Significant Cloud Type: high
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 02
Jun		01:00

SSE
SSE

 2 / 5 mph 61 / 61°F 86% 1017 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 98%
Most Significant Cloud Type: medium
31%
0.0 In
07:00

S
S

 3 / 6 mph 65 / 65°F 80% 1022 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
13:00

W
W

 6 / 12 mph 83 / 82°F 40% 1021 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
0.0 In
19:00

NE
NE

 2 / 5 mph 64 / 64°F 90% 1020 mb
Low level cloud: 0%
Mid level cloud: 88%
High level cloud: 32%
Most Significant Cloud Type: medium
88%
0.0 In
Mon 03
Jun		01:00

SSE
SSE

 2 / 4 mph 60 / 60°F 95% 1019 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 4%
Most Significant Cloud Type: medium
100%
0.0 In
07:00

SSW
SSW

 5 / 11 mph 64 / 64°F 98% 1016 mb
Low level cloud: 97%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WSW
WSW

 6 / 13 mph 83 / 86°F 60% 1011 mb
Low level cloud: 25%
Mid level cloud: 12%
High level cloud: 22%
Most Significant Cloud Type: low
31%
0.0 In
19:00

SSW
SSW

 7 / 15 mph 67 / 67°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: medium
44%
0.0 In
Tue 04
Jun		01:00

SSW
SSW

 4 / 9 mph 61 / 61°F 91% 1013 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 9%
Most Significant Cloud Type: medium
16%
0.0 In
07:00

SSW
SSW

 8 / 16 mph 65 / 65°F 99% 1014 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.7 In
13:00

SSW
SSW

 11 / 23 mph 73 / 77°F 92% 1011 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 71%
Most Significant Cloud Type: low
100%
0.9 In
19:00

W
W

 7 / 15 mph 70 / 70°F 98% 1011 mb
Low level cloud: 60%
Mid level cloud: 26%
High level cloud: 1%
Most Significant Cloud Type: low
69%
0.4 In
Wed 05
Jun		01:00

S
S

 3 / 7 mph 65 / 65°F 99% 1009 mb
Low level cloud: 92%
Mid level cloud: 75%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
07:00

SSW
SSW

 2 / 5 mph 67 / 67°F 98% 1012 mb
Low level cloud: 64%
Mid level cloud: 23%
High level cloud: 33%
Most Significant Cloud Type: low
76%
0.1 In
13:00

SW
SW

 6 / 13 mph 75 / 80°F 93% 1010 mb
Low level cloud: 83%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.1 In
19:00

SW
SW

 4 / 9 mph 67 / 67°F 93% 1008 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 98%
Most Significant Cloud Type: medium
28%
0.0 In
Thu 06
Jun		01:00

SSW
SSW

 4 / 8 mph 63 / 63°F 99% 1010 mb
Low level cloud: 32%
Mid level cloud: 15%
High level cloud: 12%
Most Significant Cloud Type: low
39%
0.1 In
07:00

S
S

 3 / 6 mph 65 / 65°F 98% 1007 mb
Low level cloud: 41%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.2 In
13:00

SW
SW

 9 / 19 mph 80 / 88°F 92% 1008 mb
Low level cloud: 59%
Mid level cloud: 27%
High level cloud: 12%
Most Significant Cloud Type: low
70%
0.1 In
19:00

WSW
WSW

 3 / 7 mph 70 / 70°F 96% 1004 mb
Low level cloud: 15%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
18%
0.3 In
Fri 07
Jun		01:00

W
W

 4 / 8 mph 63 / 63°F 98% 1008 mb
Low level cloud: 12%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.3 In
07:00

W
W

 10 / 21 mph 64 / 64°F 96% 1004 mb
Low level cloud: 89%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.0 In
13:00

WNW
WNW

 10 / 21 mph 82 / 84°F 52% 1009 mb
Low level cloud: 3%
Mid level cloud: 81%
High level cloud: 0%
Most Significant Cloud Type: medium
89%
0.0 In
19:00

NNW
NNW

 7 / 15 mph 67 / 67°F 79% 1011 mb
Low level cloud: 17%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
27%
0.1 In
Sat 08
Jun		01:00

WNW
WNW

 4 / 8 mph 58 / 58°F 95% 1010 mb
Low level cloud: 2%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
07:00

NNE
NNE

 1 / 2 mph 63 / 63°F 92% 1017 mb
Low level cloud: 23%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: low
25%
0.0 In
13:00

WNW
WNW

 11 / 23 mph 79 / 79°F 35% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
19:00

NNW
NNW

 7 / 15 mph 71 / 71°F 68% 1015 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
0.0 In
Sun 09
Jun		01:00

SW
SW

 3 / 6 mph 56 / 57°F 91% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
07:00

NE
NE

 3 / 7 mph 62 / 62°F 86% 1017 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
13:00

W
W

 7 / 15 mph 79 / 79°F 42% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

NW
NW

 4 / 9 mph 71 / 71°F 75% 1013 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Mon 10
Jun		01:00

ENE
ENE

 2 / 3 mph 55 / 55°F 96% 1017 mb
Low level cloud: 4%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
07:00

SSW
SSW

 2 / 5 mph 67 / 67°F 87% 1013 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 99%
Most Significant Cloud Type: medium
8%
0.0 In
13:00

N
N

 4 / 8 mph 82 / 82°F 40% 1015 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 99%
Most Significant Cloud Type: medium
32%
0.0 In
19:00

S
S

 4 / 9 mph 75 / 79°F 76% 1009 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: medium
12%
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