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East Dereham 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for East Dereham

Norfolk, United Kingdom

Long range weather outlook for East Dereham includes 14 day forecast summary:

The next 14 day outlook for East Dereham shows the average daytime maximum temperature will be around 9°C, with a high for the two weeks of 12°C expected on the evening of Thursday 27th. The mean minimum temperature will be 4°C, dipping to its lowest on the morning of Monday 1st at 2°C. Expect the coming 14 days to have some days seeing a little precipitation and some days with rain. The current forecast indicates Tuesday 2nd will have the most precipitation with an accumulation of around 12.0mm. On the whole winds are likely to be fresh.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 25
Nov		18:00

N
N

 9 / 14 mph 45 / 40°F 82% 1017 mb
Low level cloud: 23%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 9 / 15 mph 44 / 38°F 76% 1019 mb
Low level cloud: 52%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 26
Nov		00:00

N
N

 8 / 16 mph 39 / 34°F 78% 1020 mb
Low level cloud: 38%
Mid level cloud: 5%
High level cloud: 5%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 7 / 15 mph 38 / 32°F 81% 1021 mb
Low level cloud: 39%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

 6 / 12 mph 37 / 32°F 87% 1021 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 14%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 6 / 10 mph 40 / 35°F 86% 1022 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 9 / 12 mph 42 / 37°F 74% 1022 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
15:00

SSW
SSW

 11 / 13 mph 44 / 38°F 80% 1020 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 13 / 16 mph 42 / 35°F 84% 1020 mb
Low level cloud: 0%
Mid level cloud: 86%
High level cloud: 33%
Most Significant Cloud Type: medium
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 15 / 25 mph 40 / 32°F 80% 1019 mb
Low level cloud: 59%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 27
Nov		00:00

SSW
SSW

 18 / 28 mph 42 / 34°F 82% 1017 mb
Low level cloud: 76%
Mid level cloud: 50%
High level cloud: 16%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 18 / 29 mph 45 / 37°F 89% 1015 mb
Low level cloud: 94%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 17 / 26 mph 46 / 39°F 96% 1014 mb
Low level cloud: 92%
Mid level cloud: 26%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

 15 / 23 mph 48 / 42°F 98% 1013 mb
Low level cloud: 90%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 17 / 26 mph 52 / 47°F 88% 1012 mb
Low level cloud: 48%
Mid level cloud: 45%
High level cloud: 76%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 18 / 28 mph 52 / 47°F 88% 1011 mb
Low level cloud: 44%
Mid level cloud: 47%
High level cloud: 11%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 20 / 30 mph 53 / 48°F 93% 1010 mb
Low level cloud: 93%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 18 / 28 mph 54 / 49°F 93% 1011 mb
Low level cloud: 92%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 28
Nov		00:00

WSW
WSW

 17 / 30 mph 52 / 46°F 89% 1012 mb
Low level cloud: 13%
Mid level cloud: 11%
High level cloud: 58%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

 16 / 25 mph 46 / 40°F 85% 1012 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 15 / 24 mph 45 / 38°F 89% 1012 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 17 / 25 mph 45 / 38°F 87% 1013 mb
Low level cloud: 12%
Mid level cloud: 4%
High level cloud: 48%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 18 / 28 mph 48 / 42°F 81% 1012 mb
Low level cloud: 1%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 23 / 39 mph 49 / 42°F 79% 1010 mb
Low level cloud: 67%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

 17 / 28 mph 46 / 39°F 75% 1011 mb
Low level cloud: 3%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

 16 / 25 mph 44 / 36°F 87% 1012 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 29
Nov		00:00

SSW
SSW

 10 / 19 mph 42 / 36°F 89% 1011 mb
Low level cloud: 2%
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
03:00

S
S

 13 / 26 mph 42 / 35°F 91% 1009 mb
Low level cloud: 7%
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

S
S

 19 / 23 mph 49 / 43°F 91% 1005 mb
Low level cloud: 33%
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

S
S

 22 / 25 mph 51 / 45°F 84% 1002 mb
Low level cloud: 35%
Mid level cloud: 60%
High level cloud: 32%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

 20 / 23 mph 52 / 46°F 85% 1000 mb
Low level cloud: 99%
Mid level cloud: 98%
High level cloud: 66%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

 13 / 21 mph 42 / 36°F 80% 1001 mb
Low level cloud: 17%
Mid level cloud: 78%
High level cloud: 14%
Most Significant Cloud Type: medium
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

SW
SW

 16 / 27 mph 41 / 33°F 84% 1001 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 16 / 29 mph 39 / 30°F 90% 1002 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 30
Nov		00:00

SSW
SSW

 17 / 26 mph 40 / 31°F 89% 1001 mb
Low level cloud: 41%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 19 / 37 mph 38 / 28°F 90% 999 mb
Low level cloud: 100%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

 17 / 33 mph 37 / 28°F 94% 999 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

WSW
WSW

 14 / 18 mph 40 / 32°F 96% 1001 mb
Low level cloud: 99%
Mid level cloud: 49%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

WNW
WNW

 14 / 19 mph 43 / 36°F 85% 1002 mb
Low level cloud: 86%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

NW
NW

 13 / 17 mph 44 / 38°F 85% 1004 mb
Low level cloud: 92%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 20 / 26 mph 43 / 34°F 85% 1007 mb
Low level cloud: 85%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

 14 / 21 mph 41 / 33°F 89% 1009 mb
Low level cloud: 52%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 01
Dec		00:00

WNW
WNW

 15 / 20 mph 42 / 35°F 90% 1010 mb
Low level cloud: 90%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

 15 / 23 mph 41 / 33°F 84% 1010 mb
Low level cloud: 85%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

 12 / 19 mph 40 / 33°F 81% 1011 mb
Low level cloud: 44%
Mid level cloud: 17%
High level cloud: 9%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

 10 / 17 mph 37 / 30°F 86% 1012 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 10%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

 11 / 17 mph 40 / 33°F 77% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 11 / 15 mph 42 / 36°F 80% 1011 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: medium
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 14 / 21 mph 43 / 36°F 83% 1009 mb
Low level cloud: 87%
Mid level cloud: 48%
High level cloud: 73%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 21 / 28 mph 46 / 38°F 91% 1006 mb
Low level cloud: 96%
Mid level cloud: 99%
High level cloud: 89%
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
Tue 02
Dec		00:00

SW
SW

 22 / 47 mph 47 / 40°F 87% 1018 mb
Low level cloud: 85%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSW
SSW

 17 / 32 mph 45 / 37°F 90% 1019 mb
Low level cloud: 26%
Mid level cloud: 13%
High level cloud: 100%
Most Significant Cloud Type: low
42%
0.0 In
12:00

SSW
SSW

 16 / 29 mph 53 / 48°F 94% 1012 mb
Low level cloud: 94%
Mid level cloud: 82%
High level cloud: 14%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SW
SW

 24 / 43 mph 54 / 48°F 92% 1006 mb
Low level cloud: 97%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Wed 03
Dec		00:00

SSW
SSW

 24 / 44 mph 52 / 46°F 86% 1004 mb
Low level cloud: 96%
Mid level cloud: 26%
High level cloud: 14%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSW
SSW

 24 / 51 mph 49 / 41°F 88% 1000 mb
Low level cloud: 93%
Mid level cloud: 100%
High level cloud: 65%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSE
SSE

 19 / 33 mph 49 / 43°F 91% 998 mb
Low level cloud: 95%
Mid level cloud: 82%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

 16 / 30 mph 46 / 39°F 86% 1003 mb
Low level cloud: 3%
Mid level cloud: 18%
High level cloud: 31%
Most Significant Cloud Type: medium
28%
0.0 In
Thu 04
Dec		00:00

S
S

 10 / 20 mph 37 / 30°F 92% 1007 mb
Low level cloud: 5%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

SSW
SSW

 16 / 29 mph 43 / 35°F 91% 1002 mb
Low level cloud: 27%
Mid level cloud: 22%
High level cloud: 82%
Most Significant Cloud Type: low
44%
0.0 In
12:00

SE
SE

 14 / 25 mph 47 / 41°F 83% 1003 mb
Low level cloud: 93%
Mid level cloud: 48%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SSW
SSW

 11 / 20 mph 45 / 40°F 89% 1008 mb
Low level cloud: 35%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
Fri 05
Dec		00:00

S
S

 15 / 32 mph 42 / 34°F 94% 991 mb
Low level cloud: 93%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
06:00

S
S

 13 / 23 mph 42 / 35°F 92% 1007 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 99%
Most Significant Cloud Type: low
27%
0.0 In
12:00

SW
SW

 16 / 29 mph 46 / 39°F 66% 996 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.2 In
18:00

SSW
SSW

 23 / 43 mph 49 / 41°F 86% 1002 mb
Low level cloud: 96%
Mid level cloud: 49%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
Sat 06
Dec		00:00

WSW
WSW

 28 / 51 mph 41 / 30°F 72% 996 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.1 In
06:00

SSW
SSW

 16 / 31 mph 42 / 34°F 84% 1007 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 47%
Most Significant Cloud Type: medium
7%
0.1 In
12:00

WSW
WSW

 28 / 51 mph 43 / 33°F 78% 1001 mb
Low level cloud: 70%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.0 In
18:00

SW
SW

 24 / 47 mph 48 / 40°F 79% 1004 mb
Low level cloud: 26%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: low
30%
0.1 In
Sun 07
Dec		00:00

SW
SW

 15 / 28 mph 40 / 31°F 88% 998 mb
Low level cloud: 57%
Mid level cloud: 100%
High level cloud: 3%
Most Significant Cloud Type: low
92%
0.0 In
06:00

WSW
WSW

 26 / 49 mph 43 / 33°F 77% 1005 mb
Low level cloud: 58%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
12:00

WSW
WSW

 22 / 40 mph 41 / 31°F 75% 1004 mb
Low level cloud: 27%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
18:00

SW
SW

 16 / 32 mph 46 / 40°F 86% 1011 mb
Low level cloud: 8%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
37%
0.0 In
Mon 08
Dec		00:00

WSW
WSW

 22 / 40 mph 41 / 31°F 89% 1008 mb
Low level cloud: 95%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
06:00

WNW
WNW

 21 / 42 mph 42 / 32°F 91% 1007 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
12:00

WNW
WNW

 11 / 19 mph 43 / 37°F 90% 1007 mb
Low level cloud: 40%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
47%
0.1 In
18:00

WSW
WSW

 19 / 37 mph 44 / 36°F 85% 1012 mb
Low level cloud: 38%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
41%
0.0 In
Tue 09
Dec		00:00

WSW
WSW

 14 / 26 mph 41 / 33°F 88% 1011 mb
Low level cloud: 26%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
06:00

SSW
SSW

 27 / 53 mph 44 / 34°F 85% 1006 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 43%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WNW
WNW

 10 / 18 mph 41 / 35°F 79% 1013 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
18:00

WSW
WSW

 30 / 59 mph 56 / 51°F 73% 997 mb
Low level cloud: 50%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.1 In
Wed 10
Dec		00:00

W
W

 18 / 32 mph 40 / 31°F 80% 1013 mb
Low level cloud: 94%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WSW
WSW

 28 / 57 mph 44 / 34°F 69% 999 mb
Low level cloud: 32%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
35%
0.0 In
12:00

NE
NE

 12 / 22 mph 42 / 35°F 77% 1019 mb
Low level cloud: 69%
Mid level cloud: 5%
High level cloud: 22%
Most Significant Cloud Type: low
73%
0.0 In
18:00

WSW
WSW

 24 / 48 mph 46 / 37°F 72% 1003 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
11%
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