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Great Marton Moss 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Great Marton Moss

Lancashire, United Kingdom

Long range weather outlook for Great Marton Moss includes 14 day forecast summary:

For Great Marton Moss in the coming two weeks the average daytime maximum temperature will be around 13°C, with a high for the two weeks of 18°C expected on the afternoon of Saturday 12th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Tuesday 15th at 6°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. Predictions are Sunday 13th will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 08
Apr		18:00

NNW
NNW

 9 / 11 mph 55 / 52°F 78% 1027 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
21:00

NNE
NNE

 5 / 10 mph 50 / 48°F 77% 1028 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 09
Apr		00:00

ESE
ESE

 6 / 12 mph 48 / 45°F 70% 1029 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 6 / 11 mph 46 / 43°F 77% 1029 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 19%
Most Significant Cloud Type: high
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 5 / 9 mph 44 / 41°F 80% 1030 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

 5 / 7 mph 50 / 47°F 60% 1032 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
12:00

NE
NE

 5 / 7 mph 56 / 54°F 51% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

 7 / 11 mph 57 / 55°F 55% 1032 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 9 / 10 mph 56 / 53°F 75% 1032 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
21:00

NE
NE

 3 / 6 mph 51 / 50°F 80% 1034 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 10
Apr		00:00

SE
SE

 6 / 11 mph 48 / 45°F 78% 1035 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
03:00

SE
SE

 3 / 6 mph 46 / 46°F 79% 1034 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
06:00

S
S

 3 / 5 mph 45 / 44°F 79% 1034 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
09:00

WSW
WSW

 4 / 6 mph 52 / 50°F 68% 1034 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
12:00

WNW
WNW

 8 / 11 mph 54 / 51°F 68% 1032 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
15:00

W
W

 9 / 14 mph 55 / 51°F 66% 1031 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
18:00

W
W

 7 / 10 mph 55 / 52°F 76% 1030 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
21:00

WNW
WNW

 7 / 13 mph 51 / 48°F 82% 1030 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
Fri 11
Apr		00:00

WNW
WNW

 6 / 12 mph 50 / 47°F 87% 1028 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
03:00

W
W

 5 / 10 mph 50 / 48°F 89% 1027 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

 6 / 11 mph 48 / 46°F 90% 1026 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 9 / 16 mph 51 / 47°F 75% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 9 / 14 mph 54 / 51°F 68% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 8 / 11 mph 56 / 53°F 67% 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
18:00

NW
NW

 4 / 6 mph 56 / 55°F 76% 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
21:00

ENE
ENE

 3 / 4 mph 54 / 54°F 77% 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
Sat 12
Apr		00:00

E
E

 5 / 9 mph 51 / 50°F 71% 1019 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
03:00

ESE
ESE

 7 / 14 mph 48 / 45°F 67% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

 9 / 18 mph 47 / 43°F 74% 1015 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
09:00

SE
SE

 12 / 17 mph 56 / 53°F 72% 1013 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
12:00

SSE
SSE

 11 / 17 mph 62 / 61°F 56% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 11 / 19 mph 64 / 63°F 50% 1008 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
18:00

SE
SE

 9 / 17 mph 61 / 60°F 64% 1006 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 10 / 20 mph 55 / 52°F 72% 1005 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 100%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 13
Apr		00:00

ESE
ESE

 11 / 20 mph 54 / 50°F 76% 1002 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 12 / 19 mph 52 / 48°F 83% 999 mb
Low level cloud: 12%
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
06:00

SE
SE

 15 / 23 mph 52 / 47°F 94% 997 mb
Low level cloud: 57%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

SSE
SSE

 17 / 28 mph 54 / 49°F 91% 996 mb
Low level cloud: 62%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
91%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SW
SW

 18 / 26 mph 53 / 48°F 92% 995 mb
Low level cloud: 100%
Mid level cloud: 95%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 21 / 28 mph 48 / 41°F 90% 998 mb
Low level cloud: 99%
Mid level cloud: 69%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 15 / 21 mph 48 / 42°F 84% 1001 mb
Low level cloud: 38%
Mid level cloud: 44%
High level cloud: 8%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

 13 / 18 mph 47 / 42°F 78% 1002 mb
Low level cloud: 6%
Mid level cloud: 62%
High level cloud: 15%
Most Significant Cloud Type: medium
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 14
Apr		00:00

NW
NW

 15 / 21 mph 46 / 40°F 70% 1003 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 12 / 19 mph 45 / 39°F 71% 1004 mb
Low level cloud: 12%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 9 / 16 mph 44 / 39°F 73% 1005 mb
Low level cloud: 18%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 8 / 11 mph 47 / 43°F 69% 1007 mb
Low level cloud: 5%
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
12:00

WSW
WSW

 8 / 10 mph 50 / 46°F 65% 1008 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
15:00

WNW
WNW

 5 / 6 mph 52 / 49°F 58% 1008 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
18:00

NW
NW

 2 / 2 mph 52 / 51°F 64% 1009 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 5 / 7 mph 49 / 47°F 67% 1010 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 15
Apr		00:00

E
E

 6 / 9 mph 45 / 42°F 74% 1006 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
06:00

WSW
WSW

 9 / 13 mph 45 / 41°F 84% 1002 mb
Low level cloud: 2%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
12:00

ENE
ENE

 5 / 7 mph 53 / 52°F 76% 1006 mb
Low level cloud: 78%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 9 / 11 mph 51 / 48°F 76% 1004 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Wed 16
Apr		00:00

ENE
ENE

 8 / 12 mph 45 / 41°F 62% 1006 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

NW
NW

 15 / 23 mph 45 / 38°F 81% 1002 mb
Low level cloud: 52%
Mid level cloud: 96%
High level cloud: 100%
Most Significant Cloud Type: low
97%
0.0 In
12:00

W
W

 12 / 20 mph 48 / 43°F 77% 1006 mb
Low level cloud: 89%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.0 In
18:00

ESE
ESE

 10 / 17 mph 58 / 56°F 96% 997 mb
Low level cloud: 85%
Mid level cloud: 41%
High level cloud: 96%
Most Significant Cloud Type: low
100%
0.0 In
Thu 17
Apr		00:00

WNW
WNW

 12 / 18 mph 47 / 41°F 77% 1017 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 43%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

ENE
ENE

 15 / 32 mph 50 / 44°F 92% 998 mb
Low level cloud: 99%
Mid level cloud: 70%
High level cloud: 86%
Most Significant Cloud Type: low
100%
0.2 In
12:00

SSW
SSW

 20 / 26 mph 50 / 44°F 73% 1015 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 6 / 13 mph 55 / 54°F 95% 1008 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.3 In
Fri 18
Apr		00:00

SSW
SSW

 17 / 31 mph 48 / 41°F 90% 1011 mb
Low level cloud: 95%
Mid level cloud: 78%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NNE
NNE

 8 / 16 mph 51 / 48°F 88% 1015 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 6%
Most Significant Cloud Type: medium
43%
0.1 In
12:00

SSW
SSW

 13 / 19 mph 51 / 47°F 92% 1005 mb
Low level cloud: 88%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

 14 / 29 mph 53 / 49°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 64%
Most Significant Cloud Type: medium
4%
0.0 In
Sat 19
Apr		00:00

W
W

 18 / 33 mph 46 / 39°F 92% 1000 mb
Low level cloud: 93%
Mid level cloud: 68%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NE
NE

 6 / 13 mph 43 / 40°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
12:00

WNW
WNW

 29 / 48 mph 50 / 42°F 59% 1009 mb
Low level cloud: 11%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
18:00

N
N

 9 / 18 mph 51 / 47°F 74% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 20
Apr		00:00

W
W

 9 / 20 mph 40 / 34°F 71% 1011 mb
Low level cloud: 69%
Mid level cloud: 79%
High level cloud: 43%
Most Significant Cloud Type: low
100%
0.0 In
06:00

E
E

 4 / 8 mph 45 / 43°F 79% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
15%
0.0 In
12:00

NE
NE

 12 / 22 mph 43 / 37°F 95% 1007 mb
Low level cloud: 86%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
18:00

NW
NW

 6 / 14 mph 52 / 50°F 71% 1030 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 13%
Most Significant Cloud Type: high
13%
0.0 In
Mon 21
Apr		00:00

NNE
NNE

 6 / 12 mph 43 / 39°F 73% 1020 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
0.1 In
06:00

SSE
SSE

 5 / 10 mph 48 / 46°F 77% 1030 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 47%
Most Significant Cloud Type: medium
7%
0.0 In
12:00

SE
SE

 8 / 15 mph 46 / 42°F 45% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
4%
0.0 In
18:00

NNW
NNW

 4 / 9 mph 58 / 58°F 67% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 22
Apr		00:00

SE
SE

 20 / 38 mph 45 / 37°F 65% 1028 mb
Low level cloud: 0%
Mid level cloud: 86%
High level cloud: 98%
Most Significant Cloud Type: medium
90%
0.0 In
06:00

SE
SE

 6 / 12 mph 48 / 45°F 88% 1023 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
12:00

SE
SE

 23 / 44 mph 55 / 50°F 53% 1023 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

WSW
WSW

 3 / 7 mph 65 / 65°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 23
Apr		00:00

ESE
ESE

 17 / 33 mph 47 / 41°F 61% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

E
E

 3 / 6 mph 51 / 51°F 88% 1015 mb
Low level cloud: 38%
Mid level cloud: 20%
High level cloud: 35%
Most Significant Cloud Type: low
49%
0.0 In
12:00

ESE
ESE

 21 / 40 mph 63 / 63°F 59% 1011 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NNW
NNW

 10 / 21 mph 53 / 50°F 82% 1013 mb
Low level cloud: 0%
Mid level cloud: 54%
High level cloud: 32%
Most Significant Cloud Type: medium
55%
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