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Gortnahey 14 Day Long Range Forecast

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

County Londonderry, United Kingdom

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

Over the next 14 days the Gortnahey forecast suggests the average daytime maximum temperature will be around 7°C, with a high for the two weeks of 8°C expected on the afternoon of Saturday 15th. The mean minimum temperature will be 2°C, dipping to its lowest on the morning of Monday 10th at -1°C. Expect the next 14 days remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 06
Feb
12:00

SSE
SSE

8 / 9 mph 45 / 40°F 77% 1043 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

SSE
SSE

10 / 12 mph 46 / 41°F 80% 1041 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

10 / 17 mph 39 / 33°F 90% 1041 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

7 / 15 mph 35 / 28°F 93% 1041 mb
Low level cloud: 8%
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
Fri 07
Feb
00:00

SE
SE

7 / 15 mph 34 / 28°F 93% 1040 mb
Low level cloud: 9%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

7 / 14 mph 33 / 26°F 94% 1039 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

7 / 14 mph 32 / 26°F 93% 1038 mb
Low level cloud: 7%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

6 / 13 mph 33 / 27°F 89% 1038 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

8 / 9 mph 43 / 38°F 68% 1036 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

10 / 11 mph 43 / 38°F 70% 1034 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

6 / 12 mph 34 / 29°F 86% 1032 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

8 / 17 mph 34 / 27°F 87% 1031 mb
Low level cloud: 1%
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 08
Feb
00:00

ESE
ESE

11 / 17 mph 35 / 27°F 90% 1030 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

9 / 15 mph 33 / 26°F 89% 1029 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

8 / 15 mph 32 / 25°F 89% 1029 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

11 / 16 mph 36 / 28°F 79% 1029 mb
Low level cloud: 51%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

11 / 13 mph 41 / 35°F 69% 1030 mb
Low level cloud: 66%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

10 / 12 mph 42 / 36°F 69% 1030 mb
Low level cloud: 45%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

6 / 12 mph 33 / 28°F 85% 1032 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

5 / 11 mph 32 / 27°F 86% 1034 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 09
Feb
00:00

SE
SE

5 / 11 mph 31 / 26°F 86% 1036 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 86%
Most Significant Cloud Type: high
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

5 / 10 mph 31 / 26°F 90% 1037 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

6 / 13 mph 33 / 27°F 88% 1039 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 33%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

6 / 10 mph 35 / 30°F 87% 1041 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 11%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

11 / 12 mph 43 / 37°F 74% 1042 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: low
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

10 / 11 mph 43 / 38°F 71% 1042 mb
Low level cloud: 40%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

7 / 15 mph 34 / 28°F 90% 1043 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

6 / 13 mph 32 / 26°F 89% 1043 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 10
Feb
00:00

ESE
ESE

8 / 16 mph 32 / 25°F 88% 1043 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 37%
Most Significant Cloud Type: high
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

8 / 15 mph 32 / 25°F 88% 1042 mb
Low level cloud: 1%
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

E
E

7 / 15 mph 31 / 24°F 88% 1042 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

8 / 14 mph 33 / 26°F 86% 1041 mb
Low level cloud: 94%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ENE
ENE

14 / 16 mph 42 / 35°F 66% 1040 mb
Low level cloud: 89%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ENE
ENE

13 / 17 mph 41 / 33°F 72% 1038 mb
Low level cloud: 97%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ENE
ENE

15 / 21 mph 40 / 32°F 75% 1037 mb
Low level cloud: 96%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

15 / 21 mph 40 / 32°F 81% 1037 mb
Low level cloud: 99%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 11
Feb
00:00

E
E

15 / 20 mph 39 / 31°F 80% 1036 mb
Low level cloud: 91%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

15 / 23 mph 38 / 30°F 77% 1033 mb
Low level cloud: 64%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

17 / 27 mph 38 / 28°F 79% 1032 mb
Low level cloud: 96%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

19 / 23 mph 40 / 30°F 79% 1030 mb
Low level cloud: 96%
Mid level cloud: 25%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

20 / 23 mph 42 / 33°F 74% 1029 mb
Low level cloud: 91%
Mid level cloud: 13%
High level cloud: 41%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

19 / 21 mph 43 / 35°F 72% 1027 mb
Low level cloud: 79%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

17 / 23 mph 42 / 34°F 73% 1026 mb
Low level cloud: 83%
Mid level cloud: 99%
High level cloud: 56%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

19 / 28 mph 40 / 31°F 72% 1026 mb
Low level cloud: 41%
Mid level cloud: 44%
High level cloud: 60%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 12
Feb
00:00

ESE
ESE

19 / 25 mph 41 / 31°F 73% 1026 mb
Low level cloud: 84%
Mid level cloud: 44%
High level cloud: 93%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

20 / 27 mph 40 / 30°F 76% 1025 mb
Low level cloud: 81%
Mid level cloud: 43%
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

ESE
ESE

19 / 25 mph 39 / 29°F 84% 1025 mb
Low level cloud: 82%
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
09:00

ESE
ESE

19 / 21 mph 41 / 32°F 78% 1025 mb
Low level cloud: 88%
Mid level cloud: 95%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

19 / 22 mph 43 / 34°F 71% 1025 mb
Low level cloud: 19%
Mid level cloud: 46%
High level cloud: 32%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

19 / 21 mph 44 / 36°F 70% 1024 mb
Low level cloud: 57%
Mid level cloud: 43%
High level cloud: 99%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

17 / 21 mph 43 / 35°F 71% 1024 mb
Low level cloud: 68%
Mid level cloud: 56%
High level cloud: 77%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

17 / 24 mph 41 / 33°F 73% 1024 mb
Low level cloud: 47%
Mid level cloud: 75%
High level cloud: 22%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 13
Feb
00:00

SE
SE

17 / 28 mph 44 / 36°F 94% 1013 mb
Low level cloud: 93%
Mid level cloud: 23%
High level cloud: 5%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ESE
ESE

12 / 20 mph 34 / 25°F 82% 1008 mb
Low level cloud: 26%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: low
42%
0.0 In
12:00

SSE
SSE

7 / 12 mph 47 / 44°F 97% 1007 mb
Low level cloud: 100%
Mid level cloud: 84%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SE
SE

21 / 32 mph 48 / 41°F 95% 1006 mb
Low level cloud: 98%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 14
Feb
00:00

ESE
ESE

18 / 24 mph 39 / 30°F 84% 1010 mb
Low level cloud: 97%
Mid level cloud: 53%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
06:00

ESE
ESE

20 / 29 mph 37 / 26°F 81% 1015 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
34%
0.0 In
12:00

E
E

15 / 19 mph 40 / 32°F 97% 1006 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 45%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SE
SE

18 / 27 mph 42 / 34°F 95% 1011 mb
Low level cloud: 96%
Mid level cloud: 80%
High level cloud: 98%
Most Significant Cloud Type: low
100%
0.0 In
Sat 15
Feb
00:00

ESE
ESE

12 / 15 mph 43 / 36°F 97% 1003 mb
Low level cloud: 98%
Mid level cloud: 61%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
06:00

ESE
ESE

9 / 14 mph 42 / 37°F 97% 1012 mb
Low level cloud: 94%
Mid level cloud: 16%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
12:00

ESE
ESE

17 / 21 mph 45 / 38°F 91% 997 mb
Low level cloud: 81%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
18:00

SE
SE

13 / 15 mph 45 / 40°F 88% 1011 mb
Low level cloud: 83%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
84%
0.0 In
Sun 16
Feb
00:00

SSE
SSE

16 / 25 mph 44 / 37°F 90% 987 mb
Low level cloud: 74%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.2 In
06:00

ESE
ESE

15 / 21 mph 43 / 35°F 89% 1007 mb
Low level cloud: 42%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
41%
0.0 In
12:00

SSE
SSE

28 / 37 mph 47 / 38°F 83% 970 mb
Low level cloud: 93%
Mid level cloud: 49%
High level cloud: 45%
Most Significant Cloud Type: low
100%
0.2 In
18:00

ESE
ESE

17 / 20 mph 46 / 39°F 93% 1001 mb
Low level cloud: 99%
Mid level cloud: 61%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.0 In
Mon 17
Feb
00:00

SSW
SSW

25 / 36 mph 43 / 33°F 79% 977 mb
Low level cloud: 77%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
06:00

SE
SE

17 / 27 mph 45 / 38°F 89% 995 mb
Low level cloud: 44%
Mid level cloud: 64%
High level cloud: 97%
Most Significant Cloud Type: low
77%
0.0 In
12:00

SSW
SSW

18 / 24 mph 46 / 38°F 74% 988 mb
Low level cloud: 33%
Mid level cloud: 8%
High level cloud: 1%
Most Significant Cloud Type: low
35%
0.0 In
18:00

SSE
SSE

23 / 28 mph 48 / 40°F 90% 985 mb
Low level cloud: 86%
Mid level cloud: 100%
High level cloud: 74%
Most Significant Cloud Type: low
100%
0.1 In
Tue 18
Feb
00:00

S
S

7 / 11 mph 37 / 32°F 95% 990 mb
Low level cloud: 32%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
06:00

ESE
ESE

21 / 34 mph 41 / 31°F 86% 980 mb
Low level cloud: 87%
Mid level cloud: 44%
High level cloud: 20%
Most Significant Cloud Type: low
100%
0.0 In
12:00

SW
SW

16 / 23 mph 41 / 33°F 95% 991 mb
Low level cloud: 93%
Mid level cloud: 86%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.1 In
18:00

ESE
ESE

16 / 20 mph 45 / 37°F 90% 963 mb
Low level cloud: 79%
Mid level cloud: 32%
High level cloud: 34%
Most Significant Cloud Type: low
94%
0.4 In
Wed 19
Feb
00:00

WSW
WSW

13 / 22 mph 41 / 33°F 90% 1000 mb
Low level cloud: 54%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.1 In
06:00

E
E

15 / 25 mph 43 / 35°F 96% 955 mb
Low level cloud: 100%
Mid level cloud: 69%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.3 In
12:00

WNW
WNW

22 / 36 mph 46 / 38°F 83% 1010 mb
Low level cloud: 95%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NW
NW

5 / 7 mph 46 / 44°F 97% 961 mb
Low level cloud: 94%
Mid level cloud: 63%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.1 In
Thu 20
Feb
00:00

WSW
WSW

7 / 15 mph 39 / 34°F 95% 1021 mb
Low level cloud: 34%
Mid level cloud: 4%
High level cloud: 25%
Most Significant Cloud Type: low
37%
0.0 In
06:00

S
S

7 / 15 mph 37 / 31°F 94% 969 mb
Low level cloud: 29%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
44%
0.0 In
12:00

S
S

11 / 19 mph 44 / 38°F 95% 1015 mb
Low level cloud: 75%
Mid level cloud: 94%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.1 In
18:00

SSE
SSE

5 / 7 mph 45 / 42°F 86% 972 mb
Low level cloud: 40%
Mid level cloud: 27%
High level cloud: 14%
Most Significant Cloud Type: low
51%
0.0 In
Fri 21
Feb
00:00

WSW
WSW

18 / 30 mph 46 / 39°F 80% 1011 mb
Low level cloud: 97%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSW
SSW

4 / 8 mph 37 / 33°F 90% 977 mb
Low level cloud: 2%
Mid level cloud: 45%
High level cloud: 91%
Most Significant Cloud Type: medium
54%
0.0 In
12:00

SW
SW

13 / 22 mph 47 / 42°F 77% 1014 mb
Low level cloud: 48%
Mid level cloud: 44%
High level cloud: 7%
Most Significant Cloud Type: low
63%
0.0 In
18:00

WSW
WSW

5 / 11 mph 40 / 36°F 84% 986 mb
Low level cloud: 5%
Mid level cloud: 20%
High level cloud: 100%
Most Significant Cloud Type: medium
39%
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