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Bristol 14 Day Long Range Forecast

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

Connecticut, United States Of America

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

For Bristol in the coming two weeks the average daytime maximum temperature will be around 32°C, with a high for the two weeks of 37°C expected on the afternoon of Thursday 14th. The mean minimum temperature will be 17°C, dipping to its lowest on the morning of Friday 8th at 13°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Predictions are Thursday 7th will have the most precipitation with an accumulation of around 2.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 05
Aug		01:00

NNW
NNW

 2 / 4 mph 66 / 66°F 77% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 3 / 7 mph 60 / 60°F 80% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 7%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 4 / 5 mph 73 / 69°F 70% 1026 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 27%
Most Significant Cloud Type: high
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NE
NE

 6 / 7 mph 78 / 80°F 56% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 4 / 5 mph 88 / 86°F 43% 1026 mb
Low level cloud: 6%
Mid level cloud: 4%
High level cloud: 15%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 3 / 4 mph 88 / 87°F 41% 1025 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 13%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 6 / 10 mph 77 / 77°F 72% 1026 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 79%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 2 / 4 mph 67 / 67°F 92% 1028 mb
Low level cloud: 7%
Mid level cloud: 16%
High level cloud: 77%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 06
Aug		19:00

S
S

 3 / 7 mph 70 / 67°F 65% 1029 mb
Low level cloud: 4%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 2 / 4 mph 66 / 66°F 70% 1030 mb
Low level cloud: 2%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 07
Aug		01:00

NE
NE

 2 / 4 mph 64 / 64°F 91% 1029 mb
Low level cloud: 13%
Mid level cloud: 43%
High level cloud: 96%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 2 / 4 mph 63 / 63°F 94% 1029 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 94%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 4 mph 63 / 63°F 94% 1029 mb
Low level cloud: 16%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

 3 / 5 mph 66 / 64°F 92% 1029 mb
Low level cloud: 4%
Mid level cloud: 61%
High level cloud: 35%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

 2 / 2 mph 76 / 76°F 73% 1028 mb
Low level cloud: 1%
Mid level cloud: 47%
High level cloud: 7%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 3 / 4 mph 78 / 77°F 62% 1027 mb
Low level cloud: 7%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SE
SE

 1 / 2 mph 67 / 65°F 77% 1027 mb
Low level cloud: 23%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 2 / 4 mph 61 / 61°F 78% 1027 mb
Low level cloud: 2%
Mid level cloud: 22%
High level cloud: 14%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 08
Aug		01:00

W
W

 1 / 2 mph 58 / 58°F 79% 1027 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

WNW
WNW

 2 / 4 mph 56 / 56°F 80% 1026 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 2%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 1 / 1 mph 70 / 67°F 64% 1027 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 4%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 4 / 4 mph 81 / 79°F 46% 1026 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 4%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 6 / 7 mph 86 / 82°F 39% 1024 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 8 / 10 mph 81 / 79°F 45% 1023 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 2%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 6 / 10 mph 69 / 66°F 63% 1025 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 2 / 4 mph 62 / 62°F 73% 1025 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
Sat 09
Aug		01:00

WSW
WSW

 2 / 4 mph 58 / 58°F 78% 1025 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
04:00

W
W

 1 / 3 mph 57 / 57°F 78% 1025 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 88%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 1 / 1 mph 70 / 67°F 61% 1025 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 3 / 3 mph 83 / 80°F 37% 1025 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 11%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 6 / 6 mph 88 / 83°F 33% 1023 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 8 / 9 mph 87 / 83°F 35% 1022 mb
Low level cloud: 0%
Mid level cloud: 16%
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

S
S

 5 / 11 mph 69 / 67°F 64% 1023 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
22:00

SW
SW

 3 / 6 mph 63 / 63°F 74% 1024 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
Sun 10
Aug		01:00

WSW
WSW

 3 / 7 mph 60 / 60°F 73% 1023 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
04:00

WSW
WSW

 3 / 6 mph 58 / 59°F 69% 1023 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
07:00

WSW
WSW

 3 / 4 mph 72 / 69°F 54% 1024 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
10:00

SW
SW

 6 / 7 mph 87 / 83°F 36% 1023 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
13:00

SW
SW

 6 / 6 mph 93 / 90°F 31% 1022 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
16:00

SSW
SSW

 6 / 7 mph 93 / 91°F 33% 1021 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
19:00

SSW
SSW

 5 / 8 mph 82 / 81°F 59% 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
22:00

SW
SW

 4 / 9 mph 71 / 71°F 64% 1022 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
Mon 11
Aug		01:00

SW
SW

 4 / 8 mph 65 / 65°F 70% 1022 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
04:00

WSW
WSW

 3 / 7 mph 63 / 63°F 74% 1022 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
07:00

WSW
WSW

 3 / 4 mph 77 / 78°F 65% 1023 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
10:00

SW
SW

 6 / 7 mph 90 / 91°F 44% 1022 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
13:00

SW
SW

 6 / 7 mph 96 / 95°F 32% 1021 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
16:00

SSW
SSW

 7 / 8 mph 95 / 94°F 30% 1019 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

SSW
SSW

 6 / 11 mph 81 / 80°F 56% 1019 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

 5 / 9 mph 73 / 77°F 70% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 13%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 12
Aug		01:00

SSW
SSW

 6 / 12 mph 73 / 77°F 99% 1015 mb
Low level cloud: 64%
Mid level cloud: 44%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.0 In
07:00

W
W

 4 / 7 mph 81 / 86°F 76% 1017 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
45%
0.0 In
13:00

WSW
WSW

 7 / 14 mph 84 / 96°F 88% 1014 mb
Low level cloud: 50%
Mid level cloud: 45%
High level cloud: 85%
Most Significant Cloud Type: low
76%
0.0 In
19:00

WNW
WNW

 3 / 6 mph 81 / 86°F 72% 1010 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Wed 13
Aug		01:00

WSW
WSW

 5 / 11 mph 73 / 78°F 91% 1010 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
07:00

WNW
WNW

 3 / 4 mph 81 / 87°F 76% 1012 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 20%
Most Significant Cloud Type: medium
26%
0.0 In
13:00

W
W

 8 / 13 mph 94 / 99°F 41% 1012 mb
Low level cloud: 0%
Mid level cloud: 73%
High level cloud: 11%
Most Significant Cloud Type: medium
73%
0.0 In
19:00

S
S

 4 / 8 mph 85 / 92°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
Thu 14
Aug		01:00

WSW
WSW

 2 / 4 mph 75 / 80°F 98% 1014 mb
Low level cloud: 36%
Mid level cloud: 22%
High level cloud: 39%
Most Significant Cloud Type: low
48%
0.4 In
07:00

NW
NW

 1 / 2 mph 83 / 90°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 34%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

ENE
ENE

 3 / 6 mph 94 / 101°F 43% 1015 mb
Low level cloud: 2%
Mid level cloud: 75%
High level cloud: 36%
Most Significant Cloud Type: medium
80%
0.0 In
19:00

S
S

 5 / 9 mph 83 / 85°F 54% 1015 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: medium
46%
0.0 In
Fri 15
Aug		01:00

S
S

 1 / 3 mph 74 / 78°F 99% 1018 mb
Low level cloud: 39%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: low
53%
0.2 In
07:00

WSW
WSW

 2 / 5 mph 83 / 93°F 82% 1018 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
16%
0.0 In
13:00

S
S

 10 / 21 mph 90 / 94°F 47% 1016 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 11%
Most Significant Cloud Type: medium
90%
0.1 In
19:00

SSE
SSE

 4 / 9 mph 83 / 89°F 74% 1020 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
0.1 In
Sat 16
Aug		01:00

SSW
SSW

 4 / 9 mph 74 / 79°F 96% 1016 mb
Low level cloud: 27%
Mid level cloud: 20%
High level cloud: 12%
Most Significant Cloud Type: low
35%
0.0 In
07:00

S
S

 4 / 9 mph 78 / 83°F 92% 1021 mb
Low level cloud: 64%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.0 In
13:00

S
S

 8 / 16 mph 85 / 90°F 60% 1016 mb
Low level cloud: 21%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
49%
0.0 In
19:00

S
S

 6 / 13 mph 81 / 85°F 72% 1018 mb
Low level cloud: 1%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: medium
25%
0.1 In
Sun 17
Aug		01:00

ESE
ESE

 10 / 20 mph 72 / 76°F 98% 1012 mb
Low level cloud: 83%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
07:00

SSW
SSW

 5 / 11 mph 78 / 83°F 90% 1018 mb
Low level cloud: 55%
Mid level cloud: 21%
High level cloud: 19%
Most Significant Cloud Type: low
64%
0.0 In
13:00

SSW
SSW

 21 / 45 mph 74 / 78°F 92% 1001 mb
Low level cloud: 89%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
1.6 In
19:00

SSW
SSW

 6 / 13 mph 77 / 82°F 90% 1016 mb
Low level cloud: 2%
Mid level cloud: 16%
High level cloud: 16%
Most Significant Cloud Type: medium
22%
0.1 In
Mon 18
Aug		01:00

WNW
WNW

 12 / 25 mph 69 / 69°F 75% 1011 mb
Low level cloud: 24%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
26%
0.0 In
07:00

SSW
SSW

 5 / 11 mph 76 / 81°F 97% 1016 mb
Low level cloud: 72%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
91%
0.2 In
13:00

WSW
WSW

 5 / 11 mph 86 / 89°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 33%
Most Significant Cloud Type: medium
28%
0.0 In
19:00

SW
SW

 4 / 10 mph 75 / 80°F 96% 1015 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
49%
0.2 In
Tue 19
Aug		01:00

WSW
WSW

 3 / 5 mph 73 / 77°F 87% 1019 mb
Low level cloud: 0%
Mid level cloud: 65%
High level cloud: 99%
Most Significant Cloud Type: medium
69%
0.0 In
07:00

SW
SW

 5 / 10 mph 77 / 82°F 95% 1014 mb
Low level cloud: 51%
Mid level cloud: 13%
High level cloud: 15%
Most Significant Cloud Type: low
57%
0.1 In
13:00

E
E

 3 / 7 mph 75 / 80°F 98% 1020 mb
Low level cloud: 97%
Mid level cloud: 65%
High level cloud: 93%
Most Significant Cloud Type: low
100%
0.4 In
19:00

ENE
ENE

 7 / 14 mph 72 / 77°F 98% 1012 mb
Low level cloud: 58%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: low
78%
0.6 In
Wed 20
Aug		01:00

ENE
ENE

 3 / 7 mph 68 / 68°F 99% 1022 mb
Low level cloud: 98%
Mid level cloud: 63%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
07:00

NW
NW

 2 / 4 mph 75 / 80°F 97% 1012 mb
Low level cloud: 68%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: low
88%
1.1 In
13:00

E
E

 3 / 6 mph 79 / 82°F 66% 1022 mb
Low level cloud: 93%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
19:00

ESE
ESE

 1 / 2 mph 78 / 85°F 95% 1012 mb
Low level cloud: 1%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.2 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