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Swineshead Bridge 14 Day Long Range Forecast

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

Lincolnshire, United Kingdom

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

The outlook for Swineshead Bridge in the two weeks ahead shows the average daytime maximum temperature will be around 19°C, with a high for the two weeks of 23°C expected on the afternoon of Tuesday 25th. The mean minimum temperature will be 10°C, dipping to its lowest on the morning of Monday 17th at 8°C. The next 14 days will have most days seeing a little rain. Predictions are Sunday 16th will have the most precipitation with an accumulation of around 8.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 15
Jun		18:00

WSW
WSW

 11 / 17 mph 56 / 52°F 84% 997 mb
Low level cloud: 5%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 10 / 20 mph 48 / 44°F 93% 998 mb
Low level cloud: 16%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 16
Jun		00:00

SSW
SSW

 8 / 14 mph 48 / 44°F 98% 998 mb
Low level cloud: 80%
Mid level cloud: 58%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 9 / 13 mph 50 / 46°F 97% 998 mb
Low level cloud: 85%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
06:00

SSW
SSW

 8 / 12 mph 51 / 48°F 97% 998 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 16%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 8 / 10 mph 56 / 52°F 88% 1000 mb
Low level cloud: 69%
Mid level cloud: 22%
High level cloud: 5%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 8 / 11 mph 63 / 62°F 65% 1000 mb
Low level cloud: 83%
Mid level cloud: 12%
High level cloud: 18%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 11 / 14 mph 63 / 63°F 68% 1001 mb
Low level cloud: 9%
Mid level cloud: 73%
High level cloud: 7%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 6 / 9 mph 65 / 62°F 77% 1002 mb
Low level cloud: 4%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 7 / 15 mph 53 / 49°F 92% 1004 mb
Low level cloud: 7%
Mid level cloud: 28%
High level cloud: 11%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 17
Jun		00:00

SW
SW

 8 / 18 mph 49 / 46°F 95% 1005 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 8%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 8 / 17 mph 46 / 42°F 96% 1005 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 10 / 14 mph 51 / 47°F 93% 1006 mb
Low level cloud: 28%
Mid level cloud: 82%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

 11 / 13 mph 57 / 55°F 85% 1008 mb
Low level cloud: 83%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 13 / 17 mph 64 / 63°F 75% 1009 mb
Low level cloud: 61%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

WNW
WNW

 10 / 14 mph 66 / 64°F 73% 1009 mb
Low level cloud: 46%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

W
W

 6 / 9 mph 66 / 64°F 81% 1010 mb
Low level cloud: 10%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 6 / 14 mph 56 / 52°F 91% 1013 mb
Low level cloud: 13%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 18
Jun		00:00

WNW
WNW

 7 / 15 mph 50 / 47°F 95% 1014 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 83%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 7 / 14 mph 47 / 44°F 96% 1014 mb
Low level cloud: 13%
Mid level cloud: 3%
High level cloud: 18%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 7 / 10 mph 53 / 49°F 94% 1015 mb
Low level cloud: 54%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 9 / 10 mph 61 / 60°F 80% 1016 mb
Low level cloud: 90%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

 9 / 11 mph 64 / 63°F 70% 1017 mb
Low level cloud: 83%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

 10 / 12 mph 64 / 62°F 71% 1018 mb
Low level cloud: 45%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 8 / 11 mph 59 / 56°F 80% 1020 mb
Low level cloud: 27%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 5 / 9 mph 54 / 51°F 89% 1022 mb
Low level cloud: 33%
Mid level cloud: 51%
High level cloud: 34%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 19
Jun		00:00

NNE
NNE

 4 / 7 mph 52 / 51°F 84% 1022 mb
Low level cloud: 5%
Mid level cloud: 51%
High level cloud: 18%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

 3 / 5 mph 51 / 51°F 87% 1022 mb
Low level cloud: 10%
Mid level cloud: 16%
High level cloud: 21%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

 1 / 2 mph 55 / 54°F 82% 1024 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 3 / 4 mph 63 / 60°F 73% 1024 mb
Low level cloud: 22%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 6 / 7 mph 67 / 65°F 68% 1023 mb
Low level cloud: 82%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 7 / 9 mph 70 / 67°F 66% 1022 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 5 / 6 mph 70 / 67°F 76% 1021 mb
Low level cloud: 26%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 7 / 14 mph 59 / 56°F 91% 1021 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 20
Jun		00:00

S
S

 7 / 15 mph 53 / 50°F 95% 1019 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 5 / 10 mph 50 / 49°F 89% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 16%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 4 / 7 mph 56 / 53°F 79% 1015 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 78%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

 9 / 12 mph 62 / 61°F 65% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 43%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 9 / 13 mph 58 / 56°F 76% 1012 mb
Low level cloud: 0%
Mid level cloud: 96%
High level cloud: 77%
Most Significant Cloud Type: medium
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 9 / 14 mph 56 / 53°F 80% 1009 mb
Low level cloud: 0%
Mid level cloud: 76%
High level cloud: 33%
Most Significant Cloud Type: medium
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 6 / 9 mph 60 / 56°F 78% 1008 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 4 / 7 mph 56 / 53°F 87% 1007 mb
Low level cloud: 4%
Mid level cloud: 50%
High level cloud: 21%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 21
Jun		00:00

NE
NE

 2 / 3 mph 53 / 53°F 87% 1007 mb
Low level cloud: 22%
Mid level cloud: 44%
High level cloud: 20%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 2 / 4 mph 51 / 52°F 89% 1005 mb
Low level cloud: 82%
Mid level cloud: 6%
High level cloud: 98%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 5 / 8 mph 56 / 55°F 91% 1005 mb
Low level cloud: 94%
Mid level cloud: 42%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 9 / 13 mph 58 / 56°F 93% 1006 mb
Low level cloud: 99%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

 13 / 18 mph 59 / 59°F 91% 1007 mb
Low level cloud: 86%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

 12 / 14 mph 64 / 64°F 76% 1008 mb
Low level cloud: 59%
Mid level cloud: 23%
High level cloud: 100%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 8 / 12 mph 66 / 64°F 81% 1008 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 5%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 9 / 17 mph 57 / 53°F 92% 1009 mb
Low level cloud: 13%
Mid level cloud: 33%
High level cloud: 32%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 22
Jun		00:00

NW
NW

 4 / 8 mph 58 / 58°F 88% 1020 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 15%
Most Significant Cloud Type: medium
12%
0.0 In
06:00

SW
SW

 4 / 9 mph 60 / 60°F 87% 1020 mb
Low level cloud: 7%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: low
11%
0.0 In
12:00

SSW
SSW

 10 / 21 mph 69 / 69°F 67% 1015 mb
Low level cloud: 50%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
18:00

SSW
SSW

 8 / 16 mph 71 / 71°F 80% 1017 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
0.0 In
Sun 23
Jun		00:00

SW
SW

 9 / 19 mph 55 / 53°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 94%
Most Significant Cloud Type: medium
41%
0.0 In
06:00

W
W

 17 / 36 mph 54 / 50°F 82% 1007 mb
Low level cloud: 2%
Mid level cloud: 66%
High level cloud: 6%
Most Significant Cloud Type: medium
71%
0.0 In
12:00

W
W

 13 / 26 mph 66 / 66°F 62% 1016 mb
Low level cloud: 68%
Mid level cloud: 10%
High level cloud: 18%
Most Significant Cloud Type: low
73%
0.0 In
18:00

NNE
NNE

 10 / 21 mph 64 / 64°F 83% 1018 mb
Low level cloud: 63%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.0 In
Mon 24
Jun		00:00

ENE
ENE

 3 / 6 mph 55 / 56°F 91% 1020 mb
Low level cloud: 21%
Mid level cloud: 19%
High level cloud: 17%
Most Significant Cloud Type: low
29%
0.0 In
06:00

SSE
SSE

 2 / 3 mph 60 / 60°F 83% 1019 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In
12:00

SSW
SSW

 2 / 5 mph 70 / 70°F 70% 1021 mb
Low level cloud: 57%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
77%
0.0 In
18:00

SE
SE

 6 / 13 mph 67 / 67°F 78% 1018 mb
Low level cloud: 56%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
57%
0.0 In
Tue 25
Jun		00:00

ESE
ESE

 4 / 9 mph 57 / 56°F 90% 1022 mb
Low level cloud: 38%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: low
46%
0.0 In
06:00

WSW
WSW

 6 / 13 mph 63 / 63°F 86% 1020 mb
Low level cloud: 9%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: low
10%
0.0 In
12:00

E
E

 6 / 13 mph 70 / 70°F 69% 1024 mb
Low level cloud: 55%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: low
57%
0.0 In
18:00

NW
NW

 5 / 11 mph 74 / 78°F 78% 1022 mb
Low level cloud: 14%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Wed 26
Jun		00:00

NNE
NNE

 6 / 12 mph 53 / 51°F 89% 1026 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 86%
Most Significant Cloud Type: medium
5%
0.0 In
06:00

NE
NE

 8 / 16 mph 60 / 60°F 92% 1026 mb
Low level cloud: 70%
Mid level cloud: 62%
High level cloud: 1%
Most Significant Cloud Type: low
92%
0.0 In
12:00

NE
NE

 14 / 30 mph 67 / 67°F 65% 1025 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

E
E

 9 / 19 mph 62 / 62°F 78% 1026 mb
Low level cloud: 27%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
Thu 27
Jun		00:00

NNE
NNE

 10 / 21 mph 56 / 53°F 91% 1024 mb
Low level cloud: 56%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
56%
0.0 In
06:00

SE
SE

 5 / 10 mph 59 / 59°F 80% 1023 mb
Low level cloud: 30%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
12:00

NE
NE

 13 / 26 mph 66 / 66°F 73% 1021 mb
Low level cloud: 32%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
34%
0.0 In
18:00

E
E

 6 / 14 mph 67 / 67°F 78% 1019 mb
Low level cloud: 13%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
Fri 28
Jun		00:00

NNE
NNE

 10 / 21 mph 53 / 49°F 98% 1020 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
53%
0.0 In
06:00

SW
SW

 4 / 10 mph 60 / 60°F 91% 1015 mb
Low level cloud: 95%
Mid level cloud: 42%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 13 / 26 mph 71 / 71°F 72% 1020 mb
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
18:00

NW
NW

 7 / 14 mph 63 / 63°F 82% 1014 mb
Low level cloud: 24%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
30%
0.2 In
Sat 29
Jun		00:00

NE
NE

 8 / 16 mph 56 / 55°F 92% 1020 mb
Low level cloud: 5%
Mid level cloud: 30%
High level cloud: 4%
Most Significant Cloud Type: medium
44%
0.0 In
06:00

N
N

 12 / 25 mph 55 / 52°F 95% 1014 mb
Low level cloud: 62%
Mid level cloud: 31%
High level cloud: 16%
Most Significant Cloud Type: low
74%
0.1 In
12:00

ENE
ENE

 12 / 26 mph 73 / 77°F 72% 1020 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
0.0 In
18:00

NNE
NNE

 11 / 24 mph 62 / 62°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
Sun 30
Jun		00:00

NE
NE

 8 / 17 mph 56 / 55°F 94% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

NNW
NNW

 11 / 23 mph 58 / 55°F 85% 1018 mb
Low level cloud: 7%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
65%
0.0 In
12:00

NE
NE

 14 / 29 mph 73 / 77°F 66% 1020 mb
Low level cloud: 7%
Mid level cloud: 7%
High level cloud: 9%
Most Significant Cloud Type: low
10%
0.0 In
18:00

N
N

 14 / 30 mph 62 / 62°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 6%
Most Significant Cloud Type: medium
36%
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