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Blackford Bridge 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Blackford Bridge

Lancashire, United Kingdom

Long range weather outlook for Blackford Bridge includes 14 day forecast summary:

For Blackford Bridge in the coming two weeks the average daytime maximum temperature will be around 18°C, with a high for the two weeks of 23°C expected on the afternoon of Saturday 18th. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Sunday 26th at 9°C. The next 14 days will have most days seeing a little rain. Predictions are Sunday 19th 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
Thu 16
Aug
15:00

W
W

14 / 16 mph 66 / 65°F 54% 1011 mb
Low level cloud: 27%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:00

W
W

12 / 14 mph 65 / 64°F 62% 1012 mb
Low level cloud: 9%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

WSW
WSW

9 / 13 mph 59 / 59°F 72% 1014 mb
Low level cloud: 26%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 17
Aug
00:00

WSW
WSW

8 / 12 mph 57 / 56°F 79% 1015 mb
Low level cloud: 45%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

8 / 11 mph 56 / 54°F 83% 1015 mb
Low level cloud: 59%
Mid level cloud: 19%
High level cloud: 19%
Most Significant Cloud Type: low
67%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WSW
WSW

9 / 12 mph 57 / 53°F 83% 1016 mb
Low level cloud: 52%
Mid level cloud: 15%
High level cloud: 64%
Most Significant Cloud Type: low
64%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

WSW
WSW

11 / 12 mph 60 / 60°F 69% 1017 mb
Low level cloud: 78%
Mid level cloud: 46%
High level cloud: 76%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
12:00

WSW
WSW

11 / 13 mph 64 / 64°F 58% 1017 mb
Low level cloud: 91%
Mid level cloud: 46%
High level cloud: 76%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
15:00

SW
SW

10 / 12 mph 63 / 63°F 69% 1017 mb
Low level cloud: 89%
Mid level cloud: 73%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SW
SW

11 / 13 mph 61 / 61°F 80% 1016 mb
Low level cloud: 90%
Mid level cloud: 65%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SW
SW

10 / 13 mph 61 / 60°F 86% 1017 mb
Low level cloud: 88%
Mid level cloud: 69%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
Sat 18
Aug
00:00

WSW
WSW

9 / 14 mph 60 / 60°F 89% 1017 mb
Low level cloud: 93%
Mid level cloud: 44%
High level cloud: 74%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:00

WSW
WSW

10 / 13 mph 60 / 60°F 87% 1017 mb
Low level cloud: 90%
Mid level cloud: 15%
High level cloud: 82%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

8 / 11 mph 60 / 60°F 87% 1017 mb
Low level cloud: 90%
Mid level cloud: 4%
High level cloud: 74%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

WSW
WSW

10 / 11 mph 64 / 63°F 75% 1018 mb
Low level cloud: 60%
Mid level cloud: 19%
High level cloud: 46%
Most Significant Cloud Type: low
71%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

11 / 13 mph 72 / 76°F 61% 1018 mb
Low level cloud: 26%
Mid level cloud: 29%
High level cloud: 77%
Most Significant Cloud Type: low
45%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

W
W

11 / 12 mph 74 / 76°F 61% 1018 mb
Low level cloud: 50%
Mid level cloud: 20%
High level cloud: 39%
Most Significant Cloud Type: low
61%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

W
W

8 / 9 mph 71 / 70°F 70% 1018 mb
Low level cloud: 76%
Mid level cloud: 14%
High level cloud: 30%
Most Significant Cloud Type: low
84%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SW
SW

4 / 6 mph 66 / 66°F 78% 1019 mb
Low level cloud: 28%
Mid level cloud: 48%
High level cloud: 89%
Most Significant Cloud Type: low
55%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sun 19
Aug
00:00

S
S

6 / 8 mph 65 / 65°F 85% 1019 mb
Low level cloud: 52%
Mid level cloud: 43%
High level cloud: 13%
Most Significant Cloud Type: low
68%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SSW
SSW

8 / 11 mph 64 / 64°F 93% 1017 mb
Low level cloud: 64%
Mid level cloud: 24%
High level cloud: 84%
Most Significant Cloud Type: low
81%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

S
S

13 / 19 mph 63 / 63°F 89% 1015 mb
Low level cloud: 85%
Mid level cloud: 71%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
09:00

SSW
SSW

15 / 19 mph 64 / 64°F 87% 1014 mb
Low level cloud: 91%
Mid level cloud: 68%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.18 In of precipitation over the past 3 hours.
0.18 In
12:00

SW
SW

10 / 12 mph 66 / 65°F 90% 1014 mb
Low level cloud: 93%
Mid level cloud: 71%
High level cloud: 77%
Most Significant Cloud Type: low
100%
Expect 0.06 In of precipitation over the past 3 hours.
0.06 In
15:00

W
W

11 / 14 mph 66 / 66°F 87% 1014 mb
Low level cloud: 89%
Mid level cloud: 62%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:00

W
W

10 / 13 mph 66 / 66°F 89% 1016 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 10%
Most Significant Cloud Type: low
97%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

W
W

7 / 9 mph 65 / 65°F 94% 1017 mb
Low level cloud: 85%
Mid level cloud: 12%
High level cloud: 13%
Most Significant Cloud Type: low
90%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 20
Aug
00:00

W
W

6 / 8 mph 63 / 64°F 95% 1018 mb
Low level cloud: 61%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
64%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WSW
WSW

5 / 7 mph 62 / 62°F 96% 1018 mb
Low level cloud: 88%
Mid level cloud: 17%
High level cloud: 5%
Most Significant Cloud Type: low
94%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SW
SW

5 / 8 mph 65 / 63°F 94% 1018 mb
Low level cloud: 67%
Mid level cloud: 19%
High level cloud: 9%
Most Significant Cloud Type: low
74%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SW
SW

8 / 10 mph 70 / 68°F 79% 1018 mb
Low level cloud: 66%
Mid level cloud: 37%
High level cloud: 9%
Most Significant Cloud Type: low
80%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

13 / 15 mph 74 / 77°F 67% 1017 mb
Low level cloud: 74%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
90%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
15:00

W
W

13 / 15 mph 73 / 76°F 69% 1016 mb
Low level cloud: 73%
Mid level cloud: 4%
High level cloud: 2%
Most Significant Cloud Type: low
74%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:00

W
W

12 / 16 mph 71 / 69°F 69% 1017 mb
Low level cloud: 56%
Mid level cloud: 2%
High level cloud: 3%
Most Significant Cloud Type: low
56%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

W
W

7 / 9 mph 65 / 65°F 79% 1017 mb
Low level cloud: 88%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: low
90%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 21
Aug
00:00

W
W

7 / 10 mph 63 / 63°F 80% 1017 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
18%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

W
W

6 / 8 mph 60 / 60°F 89% 1017 mb
Low level cloud: 75%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WNW
WNW

5 / 6 mph 60 / 60°F 85% 1018 mb
Low level cloud: 87%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

W
W

6 / 8 mph 64 / 62°F 71% 1018 mb
Low level cloud: 50%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

WNW
WNW

12 / 13 mph 66 / 65°F 61% 1018 mb
Low level cloud: 70%
Mid level cloud: 6%
High level cloud: 12%
Most Significant Cloud Type: low
72%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

WNW
WNW

9 / 11 mph 67 / 65°F 57% 1018 mb
Low level cloud: 12%
Mid level cloud: 14%
High level cloud: 77%
Most Significant Cloud Type: low
26%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NW
NW

11 / 12 mph 64 / 63°F 67% 1018 mb
Low level cloud: 3%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NW
NW

7 / 8 mph 59 / 58°F 77% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Wed 22
Aug
00:00

WNW
WNW

5 / 8 mph 55 / 54°F 82% 1021 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WNW
WNW

4 / 6 mph 54 / 54°F 85% 1021 mb
Low level cloud: 7%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

NW
NW

4 / 5 mph 53 / 53°F 82% 1022 mb
Low level cloud: 16%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: low
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

WNW
WNW

7 / 8 mph 60 / 58°F 63% 1023 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

WNW
WNW

9 / 10 mph 64 / 63°F 54% 1023 mb
Low level cloud: 28%
Mid level cloud: 1%
High level cloud: 6%
Most Significant Cloud Type: low
28%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

WNW
WNW

9 / 10 mph 65 / 63°F 54% 1022 mb
Low level cloud: 9%
Mid level cloud: 2%
High level cloud: 82%
Most Significant Cloud Type: medium
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

NW
NW

7 / 8 mph 63 / 61°F 63% 1022 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 86%
Most Significant Cloud Type: medium
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

WNW
WNW

4 / 5 mph 57 / 57°F 68% 1022 mb
Low level cloud: 0%
Mid level cloud: 56%
High level cloud: 33%
Most Significant Cloud Type: medium
57%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
Aug
00:00

NW
NW

5 / 6 mph 60 / 60°F 76% 1020 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.00 In
06:00

W
W

14 / 21 mph 55 / 52°F 77% 1008 mb
Low level cloud: 71%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.08 In
12:00

WNW
WNW

8 / 9 mph 67 / 67°F 53% 1016 mb
Low level cloud: 50%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.00 In
18:00

W
W

12 / 14 mph 65 / 65°F 63% 1015 mb
Low level cloud: 17%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.00 In
Fri 24
Aug
00:00

WNW
WNW

9 / 12 mph 56 / 53°F 82% 1023 mb
Low level cloud: 39%
Mid level cloud: 6%
High level cloud: 21%
Most Significant Cloud Type: low
43%
0.00 In
06:00

WNW
WNW

7 / 10 mph 54 / 51°F 74% 1019 mb
Low level cloud: 61%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.01 In
12:00

W
W

13 / 15 mph 62 / 62°F 54% 1021 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 81%
Most Significant Cloud Type: medium
49%
0.00 In
18:00

WNW
WNW

13 / 18 mph 60 / 60°F 76% 1012 mb
Low level cloud: 56%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.06 In
Sat 25
Aug
00:00

W
W

11 / 15 mph 57 / 55°F 80% 1016 mb
Low level cloud: 91%
Mid level cloud: 62%
High level cloud: 69%
Most Significant Cloud Type: low
100%
0.01 In
06:00

NW
NW

10 / 13 mph 51 / 47°F 76% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 60%
Most Significant Cloud Type: medium
6%
0.00 In
12:00

WNW
WNW

14 / 19 mph 60 / 60°F 61% 1013 mb
Low level cloud: 21%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.04 In
18:00

NW
NW

11 / 13 mph 59 / 59°F 63% 1018 mb
Low level cloud: 22%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
25%
0.00 In
Sun 26
Aug
00:00

N
N

7 / 9 mph 55 / 53°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.04 In
06:00

N
N

5 / 6 mph 51 / 50°F 78% 1021 mb
Low level cloud: 25%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
32%
0.01 In
12:00

NNW
NNW

13 / 15 mph 57 / 54°F 63% 1018 mb
Low level cloud: 15%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.00 In
18:00

N
N

8 / 9 mph 60 / 60°F 74% 1025 mb
Low level cloud: 11%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
0.02 In
Mon 27
Aug
00:00

WNW
WNW

6 / 8 mph 51 / 49°F 89% 1019 mb
Low level cloud: 8%
Mid level cloud: 8%
High level cloud: 15%
Most Significant Cloud Type: low
12%
0.00 In
06:00

NW
NW

1 / 2 mph 52 / 53°F 90% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
12:00

W
W

10 / 11 mph 60 / 60°F 65% 1017 mb
Low level cloud: 51%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
71%
0.01 In
18:00

NW
NW

7 / 8 mph 63 / 63°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
32%
0.00 In
Tue 28
Aug
00:00

SE
SE

7 / 8 mph 54 / 51°F 91% 1014 mb
Low level cloud: 81%
Mid level cloud: 61%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.06 In
06:00

WSW
WSW

3 / 5 mph 48 / 48°F 90% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 61%
Most Significant Cloud Type: high
61%
0.00 In
12:00

NW
NW

9 / 10 mph 60 / 60°F 90% 1012 mb
Low level cloud: 77%
Mid level cloud: 43%
High level cloud: 22%
Most Significant Cloud Type: low
95%
0.15 In
18:00

NW
NW

8 / 9 mph 65 / 65°F 72% 1029 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 45%
Most Significant Cloud Type: medium
3%
0.00 In
Wed 29
Aug
00:00

WNW
WNW

9 / 13 mph 51 / 48°F 91% 1015 mb
Low level cloud: 25%
Mid level cloud: 25%
High level cloud: 7%
Most Significant Cloud Type: low
34%
0.03 In
06:00

NW
NW

1 / 2 mph 53 / 53°F 91% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
5%
0.00 In
12:00

WSW
WSW

15 / 20 mph 58 / 55°F 92% 1012 mb
Low level cloud: 73%
Mid level cloud: 44%
High level cloud: 50%
Most Significant Cloud Type: low
94%
0.07 In
18:00

NNW
NNW

2 / 2 mph 74 / 77°F 60% 1027 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 49%
Most Significant Cloud Type: medium
5%
0.00 In
Thu 30
Aug
00:00

WSW
WSW

14 / 19 mph 56 / 53°F 95% 1008 mb
Low level cloud: 83%
Mid level cloud: 59%
High level cloud: 50%
Most Significant Cloud Type: low
100%
0.18 In
06:00

ESE
ESE

4 / 7 mph 55 / 54°F 79% 1026 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 62%
Most Significant Cloud Type: medium
7%
0.00 In
12:00

WNW
WNW

20 / 32 mph 60 / 60°F 84% 1008 mb
Low level cloud: 81%
Mid level cloud: 41%
High level cloud: 33%
Most Significant Cloud Type: low
99%
0.25 In
18:00

SW
SW

2 / 3 mph 74 / 77°F 62% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: medium
4%
0.00 In
Fri 31
Aug
00:00

SW
SW

14 / 21 mph 55 / 51°F 94% 1006 mb
Low level cloud: 81%
Mid level cloud: 57%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.09 In
06:00

S
S

5 / 9 mph 54 / 53°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 32%
Most Significant Cloud Type: medium
15%
0.00 In
12:00

WNW
WNW

25 / 39 mph 61 / 62°F 79% 1002 mb
Low level cloud: 46%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: low
50%
0.29 In
18:00

SW
SW

9 / 12 mph 67 / 67°F 69% 1017 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 13%
Most Significant Cloud Type: medium
29%
0.00 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