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Herringswell 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Herringswell

Suffolk, United Kingdom

Long range weather outlook for Herringswell includes 14 day forecast summary:

The outlook for Herringswell in the two weeks ahead shows the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 16°C expected on the afternoon of Monday 20th. The average minimum temperature will be 9°C, dipping to its lowest on the morning of Sunday 26th at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 20th will have the most precipitation with an accumulation of around 9.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 16
Oct
15:00

N
N

6 / 7 mph 59 / 58°F 68% 1027 mb
Low level cloud: 64%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

6 / 11 mph 53 / 51°F 83% 1027 mb
Low level cloud: 47%
Mid level cloud: 1%
High level cloud: 4%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

4 / 6 mph 51 / 50°F 89% 1027 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
Oct
00:00

NNE
NNE

3 / 6 mph 49 / 48°F 90% 1027 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 11%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

4 / 8 mph 47 / 45°F 91% 1026 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 11%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

4 / 9 mph 46 / 44°F 92% 1026 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

5 / 6 mph 53 / 52°F 79% 1027 mb
Low level cloud: 6%
Mid level cloud: 2%
High level cloud: 8%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

6 / 6 mph 61 / 59°F 60% 1026 mb
Low level cloud: 59%
Mid level cloud: 2%
High level cloud: 7%
Most Significant Cloud Type: low
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

7 / 9 mph 59 / 57°F 60% 1026 mb
Low level cloud: 55%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

6 / 10 mph 56 / 54°F 64% 1026 mb
Low level cloud: 67%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

5 / 8 mph 55 / 54°F 65% 1027 mb
Low level cloud: 42%
Mid level cloud: 1%
High level cloud: 8%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
Oct
00:00

E
E

6 / 9 mph 53 / 52°F 66% 1027 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 41%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

6 / 12 mph 47 / 45°F 81% 1026 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 28%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

5 / 9 mph 51 / 49°F 77% 1026 mb
Low level cloud: 83%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

9 / 11 mph 55 / 52°F 69% 1026 mb
Low level cloud: 89%
Mid level cloud: 0%
High level cloud: 67%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

13 / 15 mph 58 / 55°F 58% 1024 mb
Low level cloud: 78%
Mid level cloud: 0%
High level cloud: 53%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

11 / 15 mph 56 / 52°F 59% 1022 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

10 / 15 mph 51 / 48°F 69% 1021 mb
Low level cloud: 1%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

8 / 15 mph 51 / 48°F 69% 1019 mb
Low level cloud: 0%
Mid level cloud: 70%
High level cloud: 100%
Most Significant Cloud Type: medium
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
Oct
00:00

SE
SE

11 / 18 mph 53 / 49°F 72% 1016 mb
Low level cloud: 0%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

12 / 21 mph 51 / 47°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

12 / 21 mph 51 / 46°F 79% 1011 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 98%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

14 / 22 mph 53 / 49°F 73% 1008 mb
Low level cloud: 0%
Mid level cloud: 91%
High level cloud: 62%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

16 / 19 mph 55 / 51°F 84% 1005 mb
Low level cloud: 92%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

19 / 24 mph 56 / 52°F 85% 1001 mb
Low level cloud: 90%
Mid level cloud: 95%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

16 / 24 mph 55 / 51°F 91% 1000 mb
Low level cloud: 97%
Mid level cloud: 98%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

13 / 22 mph 53 / 50°F 95% 997 mb
Low level cloud: 96%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Mon 20
Oct
00:00

SSE
SSE

12 / 17 mph 56 / 53°F 96% 994 mb
Low level cloud: 98%
Mid level cloud: 82%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SSE
SSE

11 / 16 mph 57 / 54°F 97% 990 mb
Low level cloud: 99%
Mid level cloud: 63%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

SW
SW

15 / 20 mph 57 / 53°F 91% 989 mb
Low level cloud: 85%
Mid level cloud: 22%
High level cloud: 12%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

13 / 16 mph 56 / 52°F 86% 990 mb
Low level cloud: 74%
Mid level cloud: 27%
High level cloud: 15%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

14 / 17 mph 61 / 60°F 65% 990 mb
Low level cloud: 33%
Mid level cloud: 11%
High level cloud: 10%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

11 / 15 mph 59 / 57°F 71% 988 mb
Low level cloud: 77%
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
18:00

SSW
SSW

15 / 23 mph 53 / 49°F 80% 988 mb
Low level cloud: 82%
Mid level cloud: 59%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

17 / 23 mph 53 / 48°F 89% 988 mb
Low level cloud: 82%
Mid level cloud: 90%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
Oct
00:00

SW
SW

13 / 15 mph 53 / 49°F 89% 990 mb
Low level cloud: 41%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

12 / 17 mph 51 / 46°F 89% 990 mb
Low level cloud: 43%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SW
SW

13 / 23 mph 49 / 44°F 89% 990 mb
Low level cloud: 74%
Mid level cloud: 52%
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

SW
SW

13 / 16 mph 53 / 49°F 87% 991 mb
Low level cloud: 74%
Mid level cloud: 54%
High level cloud: 46%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

16 / 19 mph 57 / 53°F 79% 991 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 70%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

16 / 20 mph 59 / 55°F 72% 992 mb
Low level cloud: 46%
Mid level cloud: 100%
High level cloud: 79%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

17 / 19 mph 57 / 53°F 73% 994 mb
Low level cloud: 96%
Mid level cloud: 20%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

17 / 20 mph 54 / 49°F 81% 995 mb
Low level cloud: 44%
Mid level cloud: 26%
High level cloud: 3%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
Oct
00:00

SW
SW

15 / 24 mph 50 / 44°F 86% 996 mb
Low level cloud: 47%
Mid level cloud: 30%
High level cloud: 12%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SW
SW

13 / 21 mph 48 / 43°F 91% 996 mb
Low level cloud: 32%
Mid level cloud: 25%
High level cloud: 12%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

9 / 14 mph 49 / 46°F 90% 994 mb
Low level cloud: 24%
Mid level cloud: 73%
High level cloud: 91%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

18 / 26 mph 53 / 48°F 89% 991 mb
Low level cloud: 99%
Mid level cloud: 87%
High level cloud: 94%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SSW
SSW

19 / 27 mph 58 / 55°F 94% 987 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 76%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

19 / 28 mph 61 / 60°F 82% 986 mb
Low level cloud: 76%
Mid level cloud: 40%
High level cloud: 63%
Most Significant Cloud Type: low
97%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

WNW
WNW

14 / 19 mph 52 / 47°F 88% 991 mb
Low level cloud: 61%
Mid level cloud: 26%
High level cloud: 88%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

10 / 17 mph 48 / 43°F 92% 995 mb
Low level cloud: 34%
Mid level cloud: 4%
High level cloud: 64%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
Oct
00:00

W
W

22 / 38 mph 52 / 46°F 82% 991 mb
Low level cloud: 74%
Mid level cloud: 29%
High level cloud: 7%
Most Significant Cloud Type: low
84%
0.0 In
06:00

SE
SE

9 / 15 mph 55 / 52°F 95% 998 mb
Low level cloud: 96%
Mid level cloud: 65%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

12 / 19 mph 59 / 57°F 61% 1010 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

19 / 30 mph 64 / 64°F 84% 1002 mb
Low level cloud: 99%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Fri 24
Oct
00:00

SSW
SSW

12 / 24 mph 50 / 46°F 86% 1004 mb
Low level cloud: 6%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
39%
0.0 In
06:00

WSW
WSW

14 / 26 mph 49 / 44°F 63% 1007 mb
Low level cloud: 31%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
33%
0.0 In
12:00

WSW
WSW

21 / 34 mph 54 / 49°F 58% 1004 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
18:00

WSW
WSW

13 / 24 mph 54 / 50°F 78% 1003 mb
Low level cloud: 18%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.0 In
Sat 25
Oct
00:00

SW
SW

17 / 28 mph 49 / 43°F 78% 1009 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 63%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

WSW
WSW

9 / 16 mph 44 / 39°F 93% 1005 mb
Low level cloud: 18%
Mid level cloud: 45%
High level cloud: 17%
Most Significant Cloud Type: low
36%
0.0 In
12:00

SSW
SSW

26 / 44 mph 60 / 60°F 74% 1003 mb
Low level cloud: 90%
Mid level cloud: 70%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

18 / 35 mph 47 / 40°F 66% 1004 mb
Low level cloud: 40%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
Sun 26
Oct
00:00

SSW
SSW

19 / 32 mph 60 / 60°F 91% 1000 mb
Low level cloud: 99%
Mid level cloud: 89%
High level cloud: 53%
Most Significant Cloud Type: low
100%
0.1 In
06:00

WNW
WNW

6 / 12 mph 42 / 38°F 87% 1006 mb
Low level cloud: 63%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
12:00

SSW
SSW

22 / 42 mph 63 / 63°F 74% 998 mb
Low level cloud: 58%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: low
78%
0.3 In
18:00

WNW
WNW

11 / 21 mph 47 / 42°F 89% 1006 mb
Low level cloud: 81%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.1 In
Mon 27
Oct
00:00

SW
SW

19 / 37 mph 55 / 50°F 70% 1003 mb
Low level cloud: 93%
Mid level cloud: 4%
High level cloud: 80%
Most Significant Cloud Type: low
100%
0.0 In
06:00

NW
NW

14 / 27 mph 38 / 29°F 76% 1013 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 32%
Most Significant Cloud Type: medium
15%
0.3 In
12:00

WNW
WNW

13 / 25 mph 51 / 47°F 80% 1011 mb
Low level cloud: 82%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.0 In
18:00

NW
NW

18 / 37 mph 43 / 34°F 76% 1020 mb
Low level cloud: 47%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
63%
0.1 In
Tue 28
Oct
00:00

NNW
NNW

7 / 15 mph 42 / 37°F 79% 1028 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

W
W

8 / 17 mph 31 / 24°F 82% 1026 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

NE
NE

2 / 3 mph 55 / 55°F 53% 1031 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
18:00

SW
SW

17 / 34 mph 45 / 37°F 73% 1021 mb
Low level cloud: 80%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Wed 29
Oct
00:00

SW
SW

4 / 8 mph 44 / 42°F 78% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

W
W

19 / 39 mph 52 / 47°F 86% 1013 mb
Low level cloud: 89%
Mid level cloud: 94%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
12:00

WNW
WNW

6 / 12 mph 51 / 48°F 56% 1021 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: medium
2%
0.0 In
18:00

WNW
WNW

21 / 43 mph 58 / 53°F 81% 1016 mb
Low level cloud: 73%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: low
80%
0.0 In
Thu 30
Oct
00:00

NNE
NNE

3 / 6 mph 46 / 45°F 90% 1017 mb
Low level cloud: 8%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: low
9%
0.0 In
06:00

NW
NW

13 / 28 mph 54 / 51°F 81% 1021 mb
Low level cloud: 28%
Mid level cloud: 21%
High level cloud: 12%
Most Significant Cloud Type: low
37%
0.0 In
12:00

ENE
ENE

6 / 11 mph 53 / 52°F 76% 1010 mb
Low level cloud: 90%
Mid level cloud: 54%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

10 / 20 mph 57 / 54°F 89% 1023 mb
Low level cloud: 82%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: low
94%
0.0 In
Fri 31
Oct
00:00

WNW
WNW

6 / 11 mph 49 / 47°F 99% 1004 mb
Low level cloud: 98%
Mid level cloud: 90%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.2 In
06:00

W
W

15 / 31 mph 48 / 43°F 85% 1021 mb
Low level cloud: 23%
Mid level cloud: 0%
High level cloud: 12%
Most Significant Cloud Type: low
24%
0.0 In
12:00

W
W

11 / 21 mph 48 / 43°F 74% 1002 mb
Low level cloud: 14%
Mid level cloud: 36%
High level cloud: 39%
Most Significant Cloud Type: low
31%
0.1 In
18:00

WNW
WNW

11 / 22 mph 54 / 51°F 76% 1025 mb
Low level cloud: 5%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: low
10%
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