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Cattle End 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Cattle End

Northamptonshire, United Kingdom

Long range weather outlook for Cattle End includes 14 day forecast summary:

The outlook for Cattle End in the two weeks ahead shows the average daytime maximum temperature will be around 13°C, with a high for the two weeks of 15°C expected on the afternoon of Friday 17th. The average minimum temperature will be 8°C, dipping to its lowest on the morning of Sunday 26th at 3°C. The coming 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 16.0mm. On the whole winds are likely to be moderate.

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

ENE
ENE

3 / 4 mph 58 / 58°F 61% 1027 mb
Low level cloud: 33%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

4 / 7 mph 52 / 51°F 79% 1027 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

3 / 6 mph 50 / 49°F 87% 1028 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 31%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
Oct
00:00

NE
NE

3 / 6 mph 47 / 46°F 89% 1027 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 18%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NE
NE

2 / 4 mph 45 / 46°F 90% 1026 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

3 / 6 mph 44 / 44°F 90% 1026 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 29%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ENE
ENE

4 / 5 mph 52 / 50°F 76% 1027 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 15%
Most Significant Cloud Type: high
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NE
NE

4 / 5 mph 58 / 58°F 61% 1027 mb
Low level cloud: 11%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

5 / 6 mph 59 / 58°F 59% 1025 mb
Low level cloud: 37%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

6 / 13 mph 51 / 48°F 79% 1026 mb
Low level cloud: 10%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

6 / 13 mph 48 / 45°F 83% 1027 mb
Low level cloud: 38%
Mid level cloud: 0%
High level cloud: 19%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
Oct
00:00

ESE
ESE

5 / 11 mph 46 / 44°F 83% 1027 mb
Low level cloud: 35%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

6 / 12 mph 45 / 42°F 81% 1026 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 98%
Most Significant Cloud Type: low
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

7 / 14 mph 45 / 42°F 82% 1025 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

7 / 9 mph 52 / 49°F 77% 1025 mb
Low level cloud: 25%
Mid level cloud: 0%
High level cloud: 59%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

13 / 15 mph 57 / 54°F 65% 1023 mb
Low level cloud: 66%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

11 / 14 mph 57 / 54°F 61% 1021 mb
Low level cloud: 28%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

12 / 18 mph 52 / 47°F 72% 1020 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

10 / 15 mph 50 / 46°F 76% 1018 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 99%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
Oct
00:00

SE
SE

11 / 15 mph 52 / 48°F 73% 1015 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

9 / 15 mph 51 / 47°F 76% 1012 mb
Low level cloud: 0%
Mid level cloud: 62%
High level cloud: 45%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

13 / 23 mph 49 / 45°F 80% 1008 mb
Low level cloud: 0%
Mid level cloud: 89%
High level cloud: 95%
Most Significant Cloud Type: medium
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

14 / 21 mph 52 / 48°F 80% 1005 mb
Low level cloud: 56%
Mid level cloud: 96%
High level cloud: 97%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

17 / 20 mph 56 / 51°F 91% 1002 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 37%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

15 / 19 mph 57 / 54°F 94% 999 mb
Low level cloud: 100%
Mid level cloud: 67%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

12 / 18 mph 56 / 53°F 97% 998 mb
Low level cloud: 99%
Mid level cloud: 46%
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

SSE
SSE

7 / 13 mph 54 / 52°F 98% 995 mb
Low level cloud: 98%
Mid level cloud: 87%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Mon 20
Oct
00:00

SSE
SSE

9 / 13 mph 56 / 54°F 98% 992 mb
Low level cloud: 100%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
03:00

SW
SW

10 / 14 mph 56 / 54°F 98% 989 mb
Low level cloud: 99%
Mid level cloud: 33%
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

WSW
WSW

11 / 15 mph 53 / 49°F 96% 989 mb
Low level cloud: 100%
Mid level cloud: 52%
High level cloud: 4%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

11 / 13 mph 54 / 51°F 86% 990 mb
Low level cloud: 78%
Mid level cloud: 15%
High level cloud: 2%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

13 / 15 mph 58 / 55°F 72% 989 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

10 / 13 mph 56 / 53°F 82% 987 mb
Low level cloud: 62%
Mid level cloud: 28%
High level cloud: 77%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

14 / 21 mph 52 / 47°F 90% 988 mb
Low level cloud: 79%
Mid level cloud: 90%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

13 / 20 mph 50 / 45°F 90% 989 mb
Low level cloud: 31%
Mid level cloud: 46%
High level cloud: 20%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
Oct
00:00

SW
SW

11 / 19 mph 49 / 44°F 90% 990 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WSW
WSW

14 / 20 mph 51 / 46°F 90% 990 mb
Low level cloud: 62%
Mid level cloud: 100%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WSW
WSW

13 / 21 mph 49 / 44°F 93% 990 mb
Low level cloud: 62%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

13 / 16 mph 53 / 48°F 87% 991 mb
Low level cloud: 51%
Mid level cloud: 54%
High level cloud: 22%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

17 / 20 mph 57 / 53°F 74% 991 mb
Low level cloud: 57%
Mid level cloud: 28%
High level cloud: 27%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

18 / 22 mph 56 / 52°F 76% 993 mb
Low level cloud: 59%
Mid level cloud: 26%
High level cloud: 39%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WSW
WSW

16 / 23 mph 53 / 48°F 75% 994 mb
Low level cloud: 14%
Mid level cloud: 22%
High level cloud: 13%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

17 / 25 mph 50 / 44°F 85% 996 mb
Low level cloud: 42%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: low
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
Oct
00:00

SW
SW

14 / 22 mph 48 / 43°F 88% 996 mb
Low level cloud: 18%
Mid level cloud: 25%
High level cloud: 99%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

12 / 20 mph 47 / 41°F 96% 996 mb
Low level cloud: 60%
Mid level cloud: 44%
High level cloud: 14%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

9 / 14 mph 49 / 45°F 96% 992 mb
Low level cloud: 96%
Mid level cloud: 98%
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

S
S

21 / 31 mph 54 / 49°F 96% 988 mb
Low level cloud: 100%
Mid level cloud: 60%
High level cloud: 98%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SSW
SSW

20 / 29 mph 59 / 55°F 92% 986 mb
Low level cloud: 97%
Mid level cloud: 70%
High level cloud: 15%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

18 / 22 mph 53 / 48°F 91% 988 mb
Low level cloud: 91%
Mid level cloud: 46%
High level cloud: 84%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

11 / 17 mph 48 / 44°F 91% 993 mb
Low level cloud: 37%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WSW
WSW

8 / 14 mph 46 / 42°F 95% 996 mb
Low level cloud: 26%
Mid level cloud: 6%
High level cloud: 13%
Most Significant Cloud Type: low
29%
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

WSW
WSW

18 / 31 mph 49 / 43°F 90% 993 mb
Low level cloud: 44%
Mid level cloud: 23%
High level cloud: 7%
Most Significant Cloud Type: low
53%
0.0 In
06:00

SE
SE

10 / 15 mph 55 / 52°F 99% 997 mb
Low level cloud: 100%
Mid level cloud: 83%
High level cloud: 57%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SSW
SSW

13 / 20 mph 58 / 55°F 61% 1009 mb
Low level cloud: 18%
Mid level cloud: 21%
High level cloud: 10%
Most Significant Cloud Type: low
27%
0.0 In
18:00

WSW
WSW

22 / 39 mph 61 / 61°F 79% 1003 mb
Low level cloud: 77%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
80%
0.0 In
Fri 24
Oct
00:00

SW
SW

13 / 22 mph 48 / 43°F 92% 1004 mb
Low level cloud: 49%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
51%
0.0 In
06:00

SW
SW

13 / 21 mph 48 / 42°F 81% 1007 mb
Low level cloud: 29%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.0 In
12:00

WSW
WSW

19 / 35 mph 53 / 47°F 65% 1004 mb
Low level cloud: 14%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
18:00

WSW
WSW

12 / 22 mph 53 / 50°F 83% 1003 mb
Low level cloud: 14%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
19%
0.0 In
Sat 25
Oct
00:00

SW
SW

16 / 30 mph 46 / 40°F 87% 1009 mb
Low level cloud: 18%
Mid level cloud: 4%
High level cloud: 56%
Most Significant Cloud Type: low
26%
0.0 In
06:00

SW
SW

9 / 17 mph 42 / 37°F 93% 1005 mb
Low level cloud: 22%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SSW
SSW

27 / 48 mph 57 / 52°F 86% 1001 mb
Low level cloud: 99%
Mid level cloud: 70%
High level cloud: 47%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

18 / 34 mph 46 / 39°F 73% 1005 mb
Low level cloud: 21%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
22%
0.0 In
Sun 26
Oct
00:00

SSW
SSW

19 / 37 mph 60 / 60°F 89% 999 mb
Low level cloud: 97%
Mid level cloud: 55%
High level cloud: 47%
Most Significant Cloud Type: low
100%
0.1 In
06:00

NW
NW

2 / 3 mph 40 / 40°F 93% 1006 mb
Low level cloud: 13%
Mid level cloud: 85%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

SSW
SSW

22 / 45 mph 59 / 59°F 80% 996 mb
Low level cloud: 96%
Mid level cloud: 25%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
18:00

NNW
NNW

6 / 13 mph 43 / 39°F 93% 1007 mb
Low level cloud: 99%
Mid level cloud: 99%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.1 In
Mon 27
Oct
00:00

SW
SW

19 / 38 mph 51 / 46°F 76% 1002 mb
Low level cloud: 98%
Mid level cloud: 4%
High level cloud: 86%
Most Significant Cloud Type: low
100%
0.0 In
06:00

WNW
WNW

9 / 18 mph 35 / 28°F 85% 1015 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.1 In
12:00

NNW
NNW

20 / 40 mph 48 / 41°F 85% 1014 mb
Low level cloud: 99%
Mid level cloud: 83%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NW
NW

9 / 19 mph 38 / 32°F 74% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
Tue 28
Oct
00:00

N
N

7 / 15 mph 43 / 38°F 92% 1028 mb
Low level cloud: 1%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
06:00

W
W

8 / 16 mph 33 / 26°F 91% 1027 mb
Low level cloud: 6%
Mid level cloud: 22%
High level cloud: 18%
Most Significant Cloud Type: medium
38%
0.0 In
12:00

E
E

3 / 6 mph 54 / 55°F 63% 1031 mb
Low level cloud: 1%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
18:00

SW
SW

19 / 37 mph 44 / 36°F 85% 1021 mb
Low level cloud: 92%
Mid level cloud: 97%
High level cloud: 42%
Most Significant Cloud Type: low
100%
0.0 In
Wed 29
Oct
00:00

SW
SW

5 / 9 mph 44 / 42°F 82% 1027 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

20 / 39 mph 52 / 47°F 89% 1015 mb
Low level cloud: 98%
Mid level cloud: 60%
High level cloud: 8%
Most Significant Cloud Type: low
100%
0.1 In
12:00

NW
NW

4 / 8 mph 54 / 54°F 55% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
18:00

WNW
WNW

19 / 37 mph 56 / 52°F 85% 1018 mb
Low level cloud: 90%
Mid level cloud: 42%
High level cloud: 99%
Most Significant Cloud Type: low
100%
0.0 In
Thu 30
Oct
00:00

NNE
NNE

6 / 11 mph 45 / 42°F 94% 1017 mb
Low level cloud: 14%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: low
16%
0.0 In
06:00

WNW
WNW

14 / 28 mph 53 / 49°F 88% 1022 mb
Low level cloud: 98%
Mid level cloud: 28%
High level cloud: 7%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ENE
ENE

8 / 17 mph 52 / 49°F 80% 1010 mb
Low level cloud: 86%
Mid level cloud: 51%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

13 / 26 mph 57 / 53°F 86% 1024 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: low
30%
0.0 In
Fri 31
Oct
00:00

W
W

4 / 8 mph 49 / 47°F 95% 1005 mb
Low level cloud: 55%
Mid level cloud: 63%
High level cloud: 80%
Most Significant Cloud Type: low
86%
0.2 In
06:00

WNW
WNW

15 / 30 mph 53 / 49°F 85% 1022 mb
Low level cloud: 80%
Mid level cloud: 0%
High level cloud: 77%
Most Significant Cloud Type: low
89%
0.0 In
12:00

WNW
WNW

15 / 30 mph 49 / 44°F 61% 1003 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
0.0 In
18:00

NW
NW

10 / 20 mph 47 / 43°F 81% 1027 mb
Low level cloud: 9%
Mid level cloud: 1%
High level cloud: 2%
Most Significant Cloud Type: low
9%
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