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Lake Sammamish 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Lake Sammamish

Washington, United States Of America

Long range weather outlook for Lake Sammamish includes 14 day forecast summary:

Taking a look at Lake Sammamish over the coming two weeks and the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 24°C expected on the afternoon of Sunday 26th. The mean minimum temperature will be 7°C, dipping to its lowest on the morning of Monday 20th at 3°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. It looks like Tuesday 21st will have the most precipitation with an accumulation of around 14.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May		13:00

SSE
SSE

 4 / 4 mph 67 / 64°F 38% 1019 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 9%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WSW
WSW

 3 / 3 mph 67 / 64°F 42% 1017 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 22%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 6 / 7 mph 55 / 53°F 62% 1018 mb
Low level cloud: 13%
Mid level cloud: 96%
High level cloud: 1%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 3 / 3 mph 51 / 51°F 74% 1020 mb
Low level cloud: 94%
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
Sat 18
May		01:00

S
S

 4 / 4 mph 48 / 47°F 82% 1020 mb
Low level cloud: 98%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 4 mph 47 / 46°F 83% 1019 mb
Low level cloud: 92%
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
07:00

S
S

 6 / 7 mph 48 / 45°F 77% 1019 mb
Low level cloud: 95%
Mid level cloud: 39%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 4 / 4 mph 54 / 52°F 63% 1019 mb
Low level cloud: 71%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 3 / 4 mph 53 / 52°F 76% 1018 mb
Low level cloud: 89%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNE
NNE

 4 / 5 mph 49 / 47°F 96% 1018 mb
Low level cloud: 86%
Mid level cloud: 58%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

E
E

 2 / 2 mph 48 / 47°F 94% 1018 mb
Low level cloud: 42%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

 2 / 3 mph 44 / 44°F 97% 1020 mb
Low level cloud: 71%
Mid level cloud: 30%
High level cloud: 3%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May		01:00

S
S

 3 / 5 mph 43 / 42°F 97% 1021 mb
Low level cloud: 84%
Mid level cloud: 51%
High level cloud: 2%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 2 / 4 mph 43 / 42°F 97% 1022 mb
Low level cloud: 61%
Mid level cloud: 62%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 2 / 3 mph 47 / 46°F 93% 1023 mb
Low level cloud: 79%
Mid level cloud: 47%
High level cloud: 2%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 1 / 2 mph 56 / 55°F 66% 1024 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 3 / 3 mph 60 / 59°F 53% 1024 mb
Low level cloud: 83%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

 4 / 4 mph 63 / 60°F 49% 1024 mb
Low level cloud: 26%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 2 / 3 mph 54 / 52°F 67% 1024 mb
Low level cloud: 4%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

E
E

 2 / 4 mph 42 / 42°F 84% 1025 mb
Low level cloud: 2%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May		01:00

ESE
ESE

 2 / 5 mph 39 / 38°F 91% 1025 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 2 / 5 mph 37 / 36°F 93% 1025 mb
Low level cloud: 15%
Mid level cloud: 13%
High level cloud: 4%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 1 / 1 mph 53 / 51°F 68% 1025 mb
Low level cloud: 24%
Mid level cloud: 7%
High level cloud: 11%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 4 / 4 mph 65 / 62°F 49% 1023 mb
Low level cloud: 11%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

 5 / 6 mph 70 / 68°F 39% 1021 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 6%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 6 / 6 mph 71 / 68°F 36% 1020 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 2%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 4 / 7 mph 58 / 57°F 61% 1019 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
22:00

SSE
SSE

 3 / 6 mph 46 / 45°F 82% 1020 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May		01:00

SSE
SSE

 4 / 7 mph 44 / 42°F 88% 1020 mb
Low level cloud: 1%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 4 / 7 mph 45 / 43°F 87% 1019 mb
Low level cloud: 42%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 4 / 6 mph 48 / 47°F 90% 1018 mb
Low level cloud: 99%
Mid level cloud: 95%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 5 / 6 mph 50 / 48°F 98% 1017 mb
Low level cloud: 100%
Mid level cloud: 98%
High level cloud: 12%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

SSE
SSE

 4 / 5 mph 51 / 50°F 97% 1016 mb
Low level cloud: 100%
Mid level cloud: 89%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

S
S

 4 / 4 mph 51 / 50°F 98% 1015 mb
Low level cloud: 99%
Mid level cloud: 96%
High level cloud: 37%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

S
S

 3 / 4 mph 51 / 50°F 99% 1014 mb
Low level cloud: 100%
Mid level cloud: 96%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

 6 / 8 mph 50 / 48°F 98% 1014 mb
Low level cloud: 100%
Mid level cloud: 92%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 22
May		01:00

S
S

 9 / 12 mph 47 / 43°F 96% 1014 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 11 / 15 mph 45 / 40°F 89% 1014 mb
Low level cloud: 97%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 11 / 14 mph 47 / 42°F 77% 1014 mb
Low level cloud: 95%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 8 / 9 mph 53 / 48°F 68% 1014 mb
Low level cloud: 52%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 8 / 11 mph 55 / 51°F 78% 1014 mb
Low level cloud: 37%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SSW
SSW

 6 / 8 mph 55 / 51°F 83% 1014 mb
Low level cloud: 36%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
46%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

S
S

 4 / 6 mph 49 / 47°F 93% 1014 mb
Low level cloud: 29%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 2 / 4 mph 45 / 44°F 96% 1016 mb
Low level cloud: 69%
Mid level cloud: 99%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		01:00

S
S

 3 / 5 mph 44 / 42°F 97% 1016 mb
Low level cloud: 64%
Mid level cloud: 45%
High level cloud: 35%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 3 / 5 mph 43 / 42°F 96% 1016 mb
Low level cloud: 51%
Mid level cloud: 100%
High level cloud: 11%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 3 / 4 mph 46 / 45°F 95% 1016 mb
Low level cloud: 44%
Mid level cloud: 82%
High level cloud: 22%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 4 / 4 mph 48 / 47°F 87% 1017 mb
Low level cloud: 78%
Mid level cloud: 94%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

 5 / 6 mph 52 / 50°F 77% 1017 mb
Low level cloud: 77%
Mid level cloud: 100%
High level cloud: 20%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 5 / 6 mph 52 / 50°F 74% 1016 mb
Low level cloud: 98%
Mid level cloud: 85%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SE
SE

 3 / 5 mph 49 / 49°F 80% 1016 mb
Low level cloud: 97%
Mid level cloud: 75%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 4 / 5 mph 48 / 47°F 82% 1016 mb
Low level cloud: 93%
Mid level cloud: 45%
High level cloud: 0%
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
Fri 24
May		04:00

SSE
SSE

 3 / 6 mph 49 / 48°F 96% 1016 mb
Low level cloud: 73%
Mid level cloud: 72%
High level cloud: 0%
Most Significant Cloud Type: low
98%
0.0 In
10:00

NNW
NNW

 3 / 5 mph 69 / 69°F 48% 1016 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 37%
Most Significant Cloud Type: medium
13%
0.0 In
16:00

NW
NW

 7 / 14 mph 72 / 75°F 41% 1014 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 9%
Most Significant Cloud Type: medium
1%
0.0 In
22:00

ENE
ENE

 2 / 4 mph 52 / 52°F 92% 1016 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
Sat 25
May		04:00

S
S

 4 / 8 mph 49 / 47°F 90% 1014 mb
Low level cloud: 71%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: low
93%
0.0 In
10:00

WNW
WNW

 3 / 6 mph 69 / 69°F 52% 1014 mb
Low level cloud: 9%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
54%
0.0 In
16:00

NW
NW

 4 / 8 mph 71 / 71°F 61% 1014 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
72%
0.0 In
22:00

ENE
ENE

 2 / 4 mph 54 / 55°F 88% 1013 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
Sun 26
May		04:00

S
S

 1 / 2 mph 53 / 53°F 90% 1017 mb
Low level cloud: 35%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
50%
0.0 In
10:00

S
S

 5 / 10 mph 65 / 65°F 56% 1016 mb
Low level cloud: 11%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
62%
0.0 In
16:00

N
N

 4 / 7 mph 74 / 76°F 42% 1018 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 10%
Most Significant Cloud Type: medium
39%
0.0 In
22:00

S
S

 3 / 6 mph 58 / 59°F 76% 1019 mb
Low level cloud: 22%
Mid level cloud: 13%
High level cloud: 43%
Most Significant Cloud Type: low
31%
0.0 In
Mon 27
May		04:00

ESE
ESE

 2 / 4 mph 50 / 51°F 95% 1021 mb
Low level cloud: 18%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
21%
0.0 In
10:00

SSW
SSW

 6 / 11 mph 57 / 56°F 66% 1023 mb
Low level cloud: 91%
Mid level cloud: 32%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NNW
NNW

 5 / 11 mph 81 / 80°F 39% 1018 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
5%
0.0 In
22:00

SE
SE

 1 / 2 mph 52 / 52°F 81% 1023 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: medium
37%
0.0 In
Tue 28
May		04:00

ESE
ESE

 1 / 2 mph 53 / 53°F 94% 1020 mb
Low level cloud: 3%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
10:00

SW
SW

 7 / 14 mph 61 / 61°F 59% 1021 mb
Low level cloud: 92%
Mid level cloud: 100%
High level cloud: 83%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NNW
NNW

 4 / 8 mph 87 / 86°F 37% 1014 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
22:00

SSW
SSW

 5 / 10 mph 51 / 50°F 98% 1021 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
Wed 29
May		04:00

NNW
NNW

 2 / 4 mph 57 / 58°F 94% 1012 mb
Low level cloud: 18%
Mid level cloud: 45%
High level cloud: 67%
Most Significant Cloud Type: low
41%
0.0 In
10:00

SW
SW

 5 / 10 mph 50 / 48°F 88% 1020 mb
Low level cloud: 81%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.1 In
16:00

SSE
SSE

 3 / 7 mph 59 / 59°F 97% 1014 mb
Low level cloud: 79%
Mid level cloud: 72%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.2 In
22:00

SSE
SSE

 3 / 6 mph 43 / 42°F 97% 1019 mb
Low level cloud: 19%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
28%
0.3 In
Thu 30
May		04:00

SSE
SSE

 6 / 12 mph 44 / 41°F 97% 1021 mb
Low level cloud: 62%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
79%
0.3 In
10:00

S
S

 4 / 8 mph 52 / 52°F 80% 1019 mb
Low level cloud: 93%
Mid level cloud: 90%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NNW
NNW

 1 / 2 mph 67 / 67°F 42% 1023 mb
Low level cloud: 2%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
54%
0.1 In
22:00

SSE
SSE

 4 / 8 mph 49 / 48°F 98% 1020 mb
Low level cloud: 96%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
Fri 31
May		04:00

ENE
ENE

 1 / 3 mph 44 / 44°F 92% 1020 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 15%
Most Significant Cloud Type: medium
44%
0.0 In
10:00

SSW
SSW

 4 / 7 mph 54 / 54°F 86% 1022 mb
Low level cloud: 87%
Mid level cloud: 48%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NNW
NNW

 6 / 13 mph 68 / 69°F 47% 1015 mb
Low level cloud: 0%
Mid level cloud: 56%
High level cloud: 100%
Most Significant Cloud Type: medium
60%
0.0 In
22:00

SSE
SSE

 1 / 2 mph 53 / 53°F 85% 1021 mb
Low level cloud: 81%
Mid level cloud: 47%
High level cloud: 6%
Most Significant Cloud Type: low
97%
0.0 In
Sat 01
Jun		04:00

SSE
SSE

 6 / 12 mph 54 / 52°F 75% 1019 mb
Low level cloud: 59%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
68%
0.0 In
10:00

W
W

 1 / 2 mph 64 / 64°F 62% 1021 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
16:00

WNW
WNW

 5 / 10 mph 62 / 62°F 61% 1020 mb
Low level cloud: 17%
Mid level cloud: 63%
High level cloud: 4%
Most Significant Cloud Type: medium
100%
0.0 In
22:00

NE
NE

 3 / 6 mph 57 / 57°F 73% 1018 mb
Low level cloud: 7%
Mid level cloud: 46%
High level cloud: 37%
Most Significant Cloud Type: medium
66%
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