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Marske-By-The-Sea 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Marske-By-The-Sea

Redcar and Cleveland, United Kingdom

Long range weather outlook for Marske-By-The-Sea includes 14 day forecast summary:

Taking a look at Marske-By-The-Sea over the coming two weeks and the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 20°C expected on the afternoon of Tuesday 28th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Tuesday 28th at 7°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. It looks like Saturday 1st will have the most precipitation with an accumulation of around 23.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
May		18:00

WNW
WNW

 7 / 9 mph 54 / 52°F 95% 1009 mb
Low level cloud: 80%
Mid level cloud: 64%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

 5 / 6 mph 54 / 53°F 96% 1011 mb
Low level cloud: 97%
Mid level cloud: 52%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

WSW
WSW

 6 / 9 mph 53 / 51°F 94% 1012 mb
Low level cloud: 96%
Mid level cloud: 44%
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

SW
SW

 5 / 7 mph 53 / 51°F 94% 1013 mb
Low level cloud: 92%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 5 / 7 mph 54 / 51°F 93% 1014 mb
Low level cloud: 53%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 6 / 10 mph 54 / 51°F 89% 1016 mb
Low level cloud: 80%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 8 / 13 mph 55 / 52°F 84% 1017 mb
Low level cloud: 83%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 10 / 18 mph 55 / 52°F 77% 1018 mb
Low level cloud: 88%
Mid level cloud: 17%
High level cloud: 11%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 9 / 15 mph 56 / 52°F 81% 1019 mb
Low level cloud: 25%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 6 / 9 mph 55 / 52°F 89% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 45%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May		00:00

S
S

 4 / 8 mph 49 / 48°F 90% 1020 mb
Low level cloud: 12%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 3 / 7 mph 47 / 46°F 90% 1019 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 3 / 5 mph 52 / 50°F 87% 1019 mb
Low level cloud: 2%
Mid level cloud: 20%
High level cloud: 18%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 5 / 6 mph 62 / 59°F 77% 1019 mb
Low level cloud: 12%
Mid level cloud: 29%
High level cloud: 100%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

 9 / 11 mph 55 / 52°F 90% 1018 mb
Low level cloud: 66%
Mid level cloud: 75%
High level cloud: 19%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

 6 / 8 mph 55 / 53°F 94% 1017 mb
Low level cloud: 59%
Mid level cloud: 87%
High level cloud: 5%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

 4 / 5 mph 56 / 55°F 92% 1016 mb
Low level cloud: 80%
Mid level cloud: 26%
High level cloud: 12%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

 1 / 1 mph 54 / 52°F 92% 1015 mb
Low level cloud: 32%
Mid level cloud: 17%
High level cloud: 10%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 26
May		00:00

SE
SE

 7 / 14 mph 49 / 46°F 93% 1013 mb
Low level cloud: 28%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 6 / 13 mph 48 / 45°F 94% 1013 mb
Low level cloud: 16%
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

SE
SE

 7 / 13 mph 52 / 48°F 87% 1012 mb
Low level cloud: 4%
Mid level cloud: 71%
High level cloud: 19%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

 10 / 16 mph 50 / 46°F 96% 1011 mb
Low level cloud: 88%
Mid level cloud: 77%
High level cloud: 18%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SSE
SSE

 10 / 12 mph 59 / 59°F 88% 1011 mb
Low level cloud: 92%
Mid level cloud: 31%
High level cloud: 62%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 10 / 13 mph 63 / 61°F 82% 1010 mb
Low level cloud: 54%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 10 / 14 mph 62 / 60°F 87% 1009 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 19%
Most Significant Cloud Type: medium
25%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSW
SSW

 9 / 19 mph 53 / 48°F 91% 1010 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 19%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May		00:00

SSW
SSW

 9 / 18 mph 49 / 46°F 92% 1011 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 8%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 12 / 21 mph 48 / 42°F 92% 1012 mb
Low level cloud: 11%
Mid level cloud: 6%
High level cloud: 18%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 10 / 14 mph 50 / 46°F 88% 1013 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 17%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 12 / 14 mph 57 / 53°F 73% 1013 mb
Low level cloud: 1%
Mid level cloud: 5%
High level cloud: 37%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 9 / 11 mph 61 / 59°F 65% 1013 mb
Low level cloud: 47%
Mid level cloud: 15%
High level cloud: 5%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 7 / 10 mph 60 / 57°F 73% 1013 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 7%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 8 / 11 mph 59 / 56°F 75% 1014 mb
Low level cloud: 1%
Mid level cloud: 25%
High level cloud: 12%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 8 / 16 mph 52 / 48°F 85% 1015 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May		00:00

SW
SW

 7 / 15 mph 46 / 42°F 85% 1014 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
03:00

SW
SW

 8 / 17 mph 44 / 39°F 84% 1014 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 6 / 13 mph 49 / 45°F 83% 1013 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 53%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

 7 / 8 mph 61 / 61°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 91%
High level cloud: 84%
Most Significant Cloud Type: medium
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

 10 / 11 mph 67 / 65°F 71% 1010 mb
Low level cloud: 44%
Mid level cloud: 44%
High level cloud: 64%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 13 / 16 mph 64 / 63°F 79% 1008 mb
Low level cloud: 26%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

 7 / 8 mph 58 / 56°F 93% 1008 mb
Low level cloud: 62%
Mid level cloud: 83%
High level cloud: 32%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 6 / 10 mph 52 / 50°F 96% 1007 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May		00:00

S
S

 5 / 6 mph 55 / 54°F 97% 1006 mb
Low level cloud: 74%
Mid level cloud: 31%
High level cloud: 32%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

 4 / 5 mph 54 / 54°F 96% 1005 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

 3 / 4 mph 53 / 53°F 96% 1006 mb
Low level cloud: 84%
Mid level cloud: 43%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 5 / 6 mph 56 / 54°F 93% 1006 mb
Low level cloud: 73%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

 5 / 6 mph 59 / 57°F 86% 1007 mb
Low level cloud: 65%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 6 / 8 mph 61 / 58°F 88% 1007 mb
Low level cloud: 48%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 6 / 8 mph 59 / 57°F 93% 1007 mb
Low level cloud: 59%
Mid level cloud: 84%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 2 / 3 mph 57 / 58°F 95% 1008 mb
Low level cloud: 86%
Mid level cloud: 55%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Thu 30
May		00:00

S
S

 7 / 12 mph 53 / 51°F 92% 1008 mb
Low level cloud: 36%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
64%
0.0 In
06:00

SSW
SSW

 4 / 8 mph 53 / 52°F 95% 1010 mb
Low level cloud: 64%
Mid level cloud: 100%
High level cloud: 49%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

 3 / 6 mph 59 / 59°F 70% 1011 mb
Low level cloud: 25%
Mid level cloud: 22%
High level cloud: 14%
Most Significant Cloud Type: low
34%
0.0 In
18:00

SE
SE

 14 / 26 mph 61 / 61°F 89% 1008 mb
Low level cloud: 37%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: low
78%
0.0 In
Fri 31
May		00:00

SSE
SSE

 11 / 21 mph 57 / 54°F 92% 1006 mb
Low level cloud: 23%
Mid level cloud: 33%
High level cloud: 100%
Most Significant Cloud Type: low
46%
0.0 In
06:00

SW
SW

 6 / 13 mph 52 / 50°F 91% 1002 mb
Low level cloud: 14%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

WNW
WNW

 5 / 10 mph 55 / 54°F 93% 1006 mb
Low level cloud: 71%
Mid level cloud: 100%
High level cloud: 57%
Most Significant Cloud Type: low
100%
0.0 In
18:00

N
N

 17 / 35 mph 54 / 49°F 95% 1018 mb
Low level cloud: 98%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Sat 01
Jun		00:00

NW
NW

 17 / 35 mph 50 / 44°F 91% 1006 mb
Low level cloud: 98%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NNW
NNW

 15 / 32 mph 50 / 44°F 85% 1021 mb
Low level cloud: 85%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
87%
0.0 In
12:00

W
W

 17 / 37 mph 51 / 46°F 87% 1006 mb
Low level cloud: 99%
Mid level cloud: 91%
High level cloud: 90%
Most Significant Cloud Type: low
100%
0.1 In
18:00

N
N

 8 / 16 mph 54 / 52°F 81% 1022 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: medium
4%
0.0 In
Sun 02
Jun		00:00

NNW
NNW

 20 / 43 mph 46 / 39°F 88% 1009 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.9 In
06:00

NW
NW

 4 / 9 mph 53 / 52°F 81% 1023 mb
Low level cloud: 6%
Mid level cloud: 33%
High level cloud: 7%
Most Significant Cloud Type: medium
49%
0.0 In
12:00

NNW
NNW

 11 / 23 mph 50 / 46°F 74% 1013 mb
Low level cloud: 89%
Mid level cloud: 39%
High level cloud: 76%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

 4 / 8 mph 60 / 60°F 76% 1022 mb
Low level cloud: 32%
Mid level cloud: 22%
High level cloud: 1%
Most Significant Cloud Type: low
39%
0.0 In
Mon 03
Jun		00:00

SW
SW

 4 / 9 mph 51 / 49°F 89% 1012 mb
Low level cloud: 16%
Mid level cloud: 33%
High level cloud: 30%
Most Significant Cloud Type: low
31%
0.0 In
06:00

WSW
WSW

 10 / 21 mph 52 / 49°F 94% 1019 mb
Low level cloud: 99%
Mid level cloud: 42%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.1 In
12:00

SSW
SSW

 8 / 17 mph 53 / 51°F 86% 1008 mb
Low level cloud: 68%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
83%
0.1 In
18:00

SW
SW

 4 / 9 mph 62 / 62°F 82% 1019 mb
Low level cloud: 16%
Mid level cloud: 44%
High level cloud: 99%
Most Significant Cloud Type: low
43%
0.0 In
Tue 04
Jun		00:00

SSW
SSW

 7 / 15 mph 48 / 45°F 87% 1005 mb
Low level cloud: 36%
Mid level cloud: 91%
High level cloud: 6%
Most Significant Cloud Type: low
68%
0.1 In
06:00

WSW
WSW

 11 / 23 mph 52 / 48°F 72% 1018 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
0.0 In
12:00

WSW
WSW

 8 / 17 mph 55 / 52°F 77% 1006 mb
Low level cloud: 62%
Mid level cloud: 36%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.1 In
18:00

WSW
WSW

 17 / 36 mph 61 / 61°F 79% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
Wed 05
Jun		00:00

WNW
WNW

 7 / 15 mph 49 / 46°F 90% 1010 mb
Low level cloud: 7%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: medium
66%
0.1 In
06:00

WSW
WSW

 9 / 18 mph 50 / 46°F 88% 1014 mb
Low level cloud: 91%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
12:00

W
W

 11 / 22 mph 56 / 54°F 63% 1013 mb
Low level cloud: 67%
Mid level cloud: 29%
High level cloud: 33%
Most Significant Cloud Type: low
80%
0.0 In
18:00

E
E

 8 / 17 mph 57 / 55°F 77% 1016 mb
Low level cloud: 41%
Mid level cloud: 84%
High level cloud: 49%
Most Significant Cloud Type: low
76%
0.0 In
Thu 06
Jun		00:00

SW
SW

 11 / 23 mph 46 / 41°F 90% 1015 mb
Low level cloud: 7%
Mid level cloud: 30%
High level cloud: 26%
Most Significant Cloud Type: medium
50%
0.0 In
06:00

SW
SW

 4 / 9 mph 50 / 49°F 93% 1011 mb
Low level cloud: 89%
Mid level cloud: 100%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.1 In
12:00

W
W

 8 / 16 mph 56 / 54°F 61% 1015 mb
Low level cloud: 37%
Mid level cloud: 44%
High level cloud: 12%
Most Significant Cloud Type: low
53%
0.0 In
18:00

NNW
NNW

 11 / 22 mph 54 / 51°F 91% 1009 mb
Low level cloud: 96%
Mid level cloud: 62%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.2 In
Fri 07
Jun		00:00

WSW
WSW

 12 / 25 mph 45 / 39°F 85% 1014 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 3%
Most Significant Cloud Type: medium
21%
0.0 In
06:00

NNW
NNW

 13 / 27 mph 46 / 40°F 91% 1008 mb
Low level cloud: 97%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

N
N

 5 / 10 mph 57 / 56°F 76% 1013 mb
Low level cloud: 79%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.1 In
18:00

NW
NW

 5 / 10 mph 50 / 48°F 86% 1011 mb
Low level cloud: 76%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.4 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