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Islands Bridge 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Islands Bridge

Tipperary, Ireland

Long range weather outlook for Islands Bridge includes 14 day forecast summary:

Over the next 14 days the Islands Bridge forecast suggests the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 21°C expected on the afternoon of Sunday 19th. The mean minimum temperature will be 8°C, dipping to its lowest on the morning of Monday 27th at 5°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Current predictions suggest Saturday 25th will have the most precipitation with an accumulation of around 11.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 19
May
15:00

NE
NE

7 / 10 mph 70 / 67°F 79% 1016 mb
Low level cloud: 44%
Mid level cloud: 15%
High level cloud: 21%
Most Significant Cloud Type: low
51%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

NE
NE

5 / 7 mph 68 / 66°F 86% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 19%
Most Significant Cloud Type: medium
12%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

ESE
ESE

2 / 4 mph 57 / 56°F 92% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 12%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

ESE
ESE

2 / 3 mph 52 / 52°F 91% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 3%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

2 / 4 mph 48 / 48°F 89% 1016 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 2%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

2 / 4 mph 53 / 52°F 90% 1016 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

4 / 4 mph 64 / 62°F 79% 1015 mb
Low level cloud: 1%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

5 / 6 mph 69 / 66°F 65% 1014 mb
Low level cloud: 7%
Mid level cloud: 28%
High level cloud: 6%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

7 / 8 mph 69 / 67°F 64% 1013 mb
Low level cloud: 11%
Mid level cloud: 28%
High level cloud: 32%
Most Significant Cloud Type: low
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

5 / 7 mph 66 / 64°F 77% 1013 mb
Low level cloud: 0%
Mid level cloud: 36%
High level cloud: 48%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

4 / 9 mph 55 / 52°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 39%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

S
S

3 / 5 mph 53 / 53°F 83% 1012 mb
Low level cloud: 38%
Mid level cloud: 79%
High level cloud: 5%
Most Significant Cloud Type: low
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

2 / 4 mph 53 / 54°F 85% 1011 mb
Low level cloud: 49%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

2 / 2 mph 54 / 53°F 92% 1010 mb
Low level cloud: 70%
Mid level cloud: 53%
High level cloud: 1%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

2 / 2 mph 57 / 56°F 92% 1010 mb
Low level cloud: 67%
Mid level cloud: 61%
High level cloud: 32%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

3 / 4 mph 57 / 56°F 94% 1010 mb
Low level cloud: 51%
Mid level cloud: 70%
High level cloud: 22%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

4 / 6 mph 59 / 57°F 92% 1009 mb
Low level cloud: 24%
Mid level cloud: 53%
High level cloud: 11%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

7 / 10 mph 58 / 55°F 94% 1009 mb
Low level cloud: 38%
Mid level cloud: 77%
High level cloud: 71%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

5 / 8 mph 55 / 53°F 97% 1009 mb
Low level cloud: 48%
Mid level cloud: 79%
High level cloud: 36%
Most Significant Cloud Type: low
80%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 22
May
00:00

WNW
WNW

7 / 13 mph 50 / 47°F 98% 1009 mb
Low level cloud: 63%
Mid level cloud: 43%
High level cloud: 19%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

7 / 12 mph 47 / 44°F 98% 1010 mb
Low level cloud: 82%
Mid level cloud: 14%
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

WNW
WNW

8 / 11 mph 48 / 44°F 98% 1011 mb
Low level cloud: 90%
Mid level cloud: 7%
High level cloud: 29%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

W
W

11 / 12 mph 55 / 52°F 80% 1011 mb
Low level cloud: 89%
Mid level cloud: 9%
High level cloud: 18%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

8 / 9 mph 57 / 54°F 73% 1012 mb
Low level cloud: 74%
Mid level cloud: 13%
High level cloud: 20%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

7 / 9 mph 59 / 57°F 70% 1011 mb
Low level cloud: 78%
Mid level cloud: 13%
High level cloud: 8%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

16 / 21 mph 53 / 48°F 93% 1013 mb
Low level cloud: 93%
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
21:00

NW
NW

15 / 21 mph 49 / 44°F 94% 1016 mb
Low level cloud: 100%
Mid level cloud: 71%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

NW
NW

13 / 19 mph 48 / 43°F 94% 1017 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
03:00

NNW
NNW

12 / 18 mph 49 / 44°F 95% 1018 mb
Low level cloud: 97%
Mid level cloud: 80%
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

N
N

10 / 15 mph 47 / 43°F 96% 1020 mb
Low level cloud: 78%
Mid level cloud: 60%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

N
N

11 / 13 mph 52 / 48°F 83% 1021 mb
Low level cloud: 80%
Mid level cloud: 37%
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

N
N

9 / 10 mph 55 / 52°F 72% 1021 mb
Low level cloud: 92%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNW
NNW

4 / 5 mph 59 / 58°F 65% 1021 mb
Low level cloud: 69%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

4 / 6 mph 54 / 53°F 81% 1021 mb
Low level cloud: 82%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

2 / 3 mph 52 / 51°F 79% 1022 mb
Low level cloud: 68%
Mid level cloud: 31%
High level cloud: 19%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May
00:00

SE
SE

4 / 6 mph 50 / 49°F 81% 1021 mb
Low level cloud: 64%
Mid level cloud: 25%
High level cloud: 10%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

4 / 9 mph 44 / 42°F 95% 1021 mb
Low level cloud: 20%
Mid level cloud: 15%
High level cloud: 18%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

3 / 6 mph 48 / 46°F 91% 1020 mb
Low level cloud: 3%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

7 / 8 mph 57 / 53°F 77% 1019 mb
Low level cloud: 29%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

13 / 14 mph 59 / 56°F 76% 1018 mb
Low level cloud: 73%
Mid level cloud: 51%
High level cloud: 95%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

14 / 16 mph 59 / 56°F 71% 1017 mb
Low level cloud: 55%
Mid level cloud: 41%
High level cloud: 82%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

12 / 17 mph 55 / 50°F 83% 1017 mb
Low level cloud: 39%
Mid level cloud: 87%
High level cloud: 6%
Most Significant Cloud Type: low
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

13 / 19 mph 53 / 48°F 87% 1017 mb
Low level cloud: 76%
Mid level cloud: 88%
High level cloud: 14%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May
00:00

SSE
SSE

16 / 23 mph 52 / 47°F 87% 1016 mb
Low level cloud: 81%
Mid level cloud: 57%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

17 / 26 mph 51 / 46°F 95% 1014 mb
Low level cloud: 74%
Mid level cloud: 89%
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

SSE
SSE

17 / 28 mph 51 / 45°F 94% 1012 mb
Low level cloud: 67%
Mid level cloud: 55%
High level cloud: 33%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

18 / 27 mph 52 / 46°F 94% 1011 mb
Low level cloud: 70%
Mid level cloud: 76%
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

SSE
SSE

21 / 31 mph 52 / 46°F 97% 1009 mb
Low level cloud: 100%
Mid level cloud: 99%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
15:00

SSE
SSE

11 / 16 mph 54 / 50°F 98% 1008 mb
Low level cloud: 96%
Mid level cloud: 43%
High level cloud: 36%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

WNW
WNW

6 / 9 mph 59 / 56°F 92% 1008 mb
Low level cloud: 27%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
36%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

NW
NW

4 / 9 mph 50 / 48°F 94% 1009 mb
Low level cloud: 17%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May
00:00

ESE
ESE

6 / 14 mph 51 / 48°F 97% 1010 mb
Low level cloud: 67%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SE
SE

5 / 10 mph 52 / 51°F 99% 1014 mb
Low level cloud: 95%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
12:00

WNW
WNW

8 / 16 mph 52 / 50°F 92% 1008 mb
Low level cloud: 91%
Mid level cloud: 82%
High level cloud: 17%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NE
NE

7 / 14 mph 54 / 52°F 99% 1010 mb
Low level cloud: 99%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Mon 27
May
00:00

S
S

8 / 16 mph 50 / 47°F 94% 1011 mb
Low level cloud: 15%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
86%
0.0 In
06:00

NNE
NNE

5 / 10 mph 54 / 53°F 96% 1021 mb
Low level cloud: 36%
Mid level cloud: 45%
High level cloud: 3%
Most Significant Cloud Type: low
52%
0.0 In
12:00

N
N

6 / 14 mph 61 / 61°F 79% 1020 mb
Low level cloud: 74%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
77%
0.0 In
18:00

NW
NW

9 / 19 mph 58 / 56°F 78% 1019 mb
Low level cloud: 17%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
23%
0.0 In
Tue 28
May
00:00

NNE
NNE

4 / 9 mph 46 / 44°F 91% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNW
NNW

3 / 6 mph 49 / 48°F 93% 1020 mb
Low level cloud: 17%
Mid level cloud: 5%
High level cloud: 15%
Most Significant Cloud Type: low
20%
0.0 In
12:00

NNE
NNE

10 / 22 mph 67 / 67°F 70% 1023 mb
Low level cloud: 5%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
5%
0.0 In
18:00

SSE
SSE

5 / 11 mph 59 / 59°F 81% 1018 mb
Low level cloud: 6%
Mid level cloud: 13%
High level cloud: 12%
Most Significant Cloud Type: low
11%
0.0 In
Wed 29
May
00:00

N
N

6 / 12 mph 50 / 47°F 93% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

ENE
ENE

3 / 6 mph 50 / 50°F 90% 1017 mb
Low level cloud: 3%
Mid level cloud: 3%
High level cloud: 22%
Most Significant Cloud Type: low
7%
0.0 In
12:00

NNE
NNE

11 / 23 mph 66 / 66°F 71% 1020 mb
Low level cloud: 7%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
30%
0.0 In
18:00

SE
SE

8 / 17 mph 60 / 60°F 87% 1013 mb
Low level cloud: 9%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
38%
0.1 In
Thu 30
May
00:00

N
N

4 / 9 mph 50 / 48°F 92% 1019 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 25%
Most Significant Cloud Type: medium
14%
0.0 In
06:00

E
E

4 / 8 mph 54 / 53°F 94% 1012 mb
Low level cloud: 43%
Mid level cloud: 68%
High level cloud: 100%
Most Significant Cloud Type: low
79%
0.0 In
12:00

NNE
NNE

6 / 13 mph 65 / 65°F 73% 1018 mb
Low level cloud: 92%
Mid level cloud: 10%
High level cloud: 32%
Most Significant Cloud Type: low
99%
0.0 In
18:00

E
E

9 / 19 mph 62 / 62°F 85% 1010 mb
Low level cloud: 10%
Mid level cloud: 56%
High level cloud: 43%
Most Significant Cloud Type: medium
84%
0.0 In
Fri 31
May
00:00

SSE
SSE

2 / 4 mph 51 / 52°F 96% 1018 mb
Low level cloud: 40%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
43%
0.0 In
06:00

NE
NE

8 / 17 mph 57 / 55°F 97% 1008 mb
Low level cloud: 98%
Mid level cloud: 54%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.1 In
12:00

SE
SE

4 / 8 mph 65 / 65°F 76% 1016 mb
Low level cloud: 75%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
82%
0.0 In
18:00

SSE
SSE

6 / 12 mph 56 / 55°F 96% 1009 mb
Low level cloud: 61%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
97%
0.2 In
Sat 01
Jun
00:00

S
S

2 / 5 mph 55 / 56°F 95% 1013 mb
Low level cloud: 57%
Mid level cloud: 31%
High level cloud: 18%
Most Significant Cloud Type: low
69%
0.1 In
06:00

WNW
WNW

2 / 4 mph 52 / 52°F 95% 1011 mb
Low level cloud: 39%
Mid level cloud: 12%
High level cloud: 38%
Most Significant Cloud Type: low
47%
0.0 In
12:00

NNW
NNW

4 / 8 mph 64 / 64°F 86% 1010 mb
Low level cloud: 86%
Mid level cloud: 100%
High level cloud: 26%
Most Significant Cloud Type: low
100%
0.1 In
18:00

NNW
NNW

4 / 8 mph 58 / 59°F 92% 1010 mb
Low level cloud: 32%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
55%
0.2 In
Sun 02
Jun
00:00

NW
NW

0 / 1 mph 57 / 57°F 97% 1008 mb
Low level cloud: 100%
Mid level cloud: 79%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.2 In
06:00

ENE
ENE

2 / 4 mph 50 / 50°F 97% 1011 mb
Low level cloud: 78%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

S
S

8 / 17 mph 63 / 63°F 85% 1009 mb
Low level cloud: 81%
Mid level cloud: 17%
High level cloud: 76%
Most Significant Cloud Type: low
95%
0.0 In
18:00

SSW
SSW

3 / 7 mph 56 / 56°F 95% 1008 mb
Low level cloud: 87%
Mid level cloud: 85%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.1 In
Mon 03
Jun
00:00

SE
SE

2 / 4 mph 50 / 50°F 90% 1013 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.0 In
06:00

SE
SE

3 / 7 mph 50 / 49°F 96% 1008 mb
Low level cloud: 43%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: low
55%
0.0 In
12:00

NE
NE

11 / 23 mph 67 / 67°F 73% 1011 mb
Low level cloud: 53%
Mid level cloud: 29%
High level cloud: 33%
Most Significant Cloud Type: low
67%
0.0 In
18:00

SSE
SSE

12 / 25 mph 58 / 56°F 84% 1007 mb
Low level cloud: 31%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: low
37%
0.1 In

Other Locations Near to Islands Bridge

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