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Otis Ridge 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Otis Ridge

Massachusetts, United States Of America

Long range weather outlook for Otis Ridge includes 14 day forecast summary:

Reviewing the forecast for Otis Ridge Over the next 14 days and the average daytime maximum temperature will be around 22°C, with a high for the two weeks of 25°C expected on the afternoon of Saturday 6th. The mean minimum temperature will be 11°C, dipping to its lowest on the morning of Monday 8th at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Friday 5th will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 31
Aug		16:00

NNE
NNE

 4 / 4 mph 76 / 76°F 40% 1021 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 3 / 6 mph 67 / 65°F 58% 1023 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 2 / 5 mph 62 / 62°F 62% 1024 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 6%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 01
Sep		01:00

SSE
SSE

 0 / 1 mph 57 / 57°F 74% 1024 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 95%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 3 / 7 mph 55 / 55°F 77% 1025 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 4 mph 60 / 60°F 71% 1026 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 100%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 5 / 6 mph 73 / 76°F 47% 1025 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 32%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 6 / 7 mph 74 / 76°F 43% 1025 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 100%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 5 / 7 mph 71 / 69°F 57% 1024 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 100%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

E
E

 2 / 5 mph 60 / 60°F 77% 1024 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 7%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 2 / 5 mph 56 / 57°F 89% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 02
Sep		01:00

NNE
NNE

 3 / 6 mph 53 / 53°F 91% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 3 / 6 mph 51 / 51°F 94% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NE
NE

 2 / 3 mph 59 / 59°F 75% 1022 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

E
E

 5 / 6 mph 71 / 68°F 47% 1020 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 5 / 6 mph 75 / 75°F 37% 1018 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

ESE
ESE

 4 / 4 mph 75 / 76°F 39% 1017 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

 1 / 3 mph 64 / 62°F 62% 1017 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 4 / 7 mph 58 / 59°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 03
Sep		01:00

SSW
SSW

 3 / 6 mph 58 / 58°F 83% 1016 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

 2 / 4 mph 54 / 54°F 91% 1016 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 7%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 1 / 2 mph 59 / 58°F 79% 1016 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 5%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

 4 / 5 mph 74 / 76°F 46% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 9%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 5 / 8 mph 73 / 76°F 46% 1014 mb
Low level cloud: 0%
Mid level cloud: 63%
High level cloud: 12%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 3 / 5 mph 72 / 68°F 57% 1013 mb
Low level cloud: 0%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 5 / 11 mph 62 / 60°F 72% 1014 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 5 / 11 mph 58 / 58°F 82% 1015 mb
Low level cloud: 0%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 04
Sep		01:00

SSW
SSW

 4 / 8 mph 60 / 60°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: medium
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 3 / 6 mph 59 / 60°F 75% 1015 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 5 / 8 mph 64 / 61°F 79% 1015 mb
Low level cloud: 2%
Mid level cloud: 51%
High level cloud: 0%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 11 / 13 mph 73 / 76°F 57% 1014 mb
Low level cloud: 74%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 13 / 15 mph 76 / 77°F 50% 1012 mb
Low level cloud: 4%
Mid level cloud: 63%
High level cloud: 6%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 12 / 15 mph 73 / 76°F 55% 1011 mb
Low level cloud: 6%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
60%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 13 / 19 mph 66 / 65°F 74% 1012 mb
Low level cloud: 2%
Mid level cloud: 24%
High level cloud: 9%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 8 / 13 mph 62 / 62°F 95% 1014 mb
Low level cloud: 67%
Mid level cloud: 50%
High level cloud: 33%
Most Significant Cloud Type: low
88%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Fri 05
Sep		01:00

S
S

 8 / 13 mph 61 / 61°F 97% 1013 mb
Low level cloud: 68%
Mid level cloud: 62%
High level cloud: 72%
Most Significant Cloud Type: low
98%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
04:00

S
S

 7 / 11 mph 61 / 61°F 98% 1012 mb
Low level cloud: 81%
Mid level cloud: 71%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

S
S

 7 / 11 mph 63 / 62°F 99% 1013 mb
Low level cloud: 100%
Mid level cloud: 55%
High level cloud: 72%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 8 / 11 mph 65 / 65°F 98% 1012 mb
Low level cloud: 96%
Mid level cloud: 18%
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

SSW
SSW

 12 / 16 mph 73 / 76°F 79% 1011 mb
Low level cloud: 44%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 11 / 14 mph 76 / 78°F 67% 1010 mb
Low level cloud: 20%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 6 / 12 mph 67 / 65°F 95% 1011 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 1%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 5 / 11 mph 64 / 64°F 98% 1011 mb
Low level cloud: 3%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 06
Sep		01:00

SSW
SSW

 8 / 17 mph 65 / 65°F 95% 1010 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 5 / 9 mph 64 / 64°F 99% 1010 mb
Low level cloud: 51%
Mid level cloud: 48%
High level cloud: 18%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 4 / 6 mph 68 / 65°F 96% 1011 mb
Low level cloud: 39%
Mid level cloud: 45%
High level cloud: 1%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 10 / 12 mph 76 / 77°F 55% 1011 mb
Low level cloud: 20%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 13 / 15 mph 77 / 76°F 35% 1011 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 9 / 12 mph 75 / 76°F 40% 1011 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 9 / 15 mph 60 / 57°F 66% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 8 / 14 mph 52 / 50°F 76% 1018 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 07
Sep		01:00

NW
NW

 5 / 11 mph 52 / 51°F 76% 1022 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
07:00

WNW
WNW

 4 / 9 mph 56 / 55°F 93% 1019 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
13:00

W
W

 9 / 16 mph 73 / 75°F 34% 1019 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
19:00

NW
NW

 4 / 9 mph 56 / 56°F 57% 1018 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
Mon 08
Sep		01:00

W
W

 2 / 3 mph 59 / 59°F 63% 1019 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
07:00

NW
NW

 6 / 13 mph 51 / 49°F 74% 1024 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
13:00

WNW
WNW

 13 / 22 mph 64 / 64°F 34% 1022 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
0.0 In
19:00

NNW
NNW

 4 / 7 mph 54 / 54°F 62% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 09
Sep		01:00

WNW
WNW

 4 / 8 mph 45 / 43°F 75% 1029 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

SSW
SSW

 2 / 3 mph 57 / 56°F 60% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: high
16%
0.0 In
13:00

W
W

 7 / 11 mph 65 / 65°F 36% 1027 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 18%
Most Significant Cloud Type: medium
19%
0.0 In
19:00

S
S

 5 / 10 mph 59 / 58°F 74% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Wed 10
Sep		01:00

S
S

 6 / 10 mph 57 / 56°F 82% 1026 mb
Low level cloud: 17%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: low
34%
0.0 In
07:00

S
S

 3 / 5 mph 58 / 59°F 81% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

SW
SW

 17 / 29 mph 79 / 80°F 54% 1018 mb
Low level cloud: 60%
Mid level cloud: 35%
High level cloud: 32%
Most Significant Cloud Type: low
75%
0.0 In
19:00

SSE
SSE

 5 / 10 mph 58 / 57°F 81% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 11
Sep		01:00

SSW
SSW

 9 / 17 mph 63 / 63°F 93% 1016 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 60%
Most Significant Cloud Type: medium
68%
0.3 In
07:00

S
S

 3 / 5 mph 60 / 60°F 97% 1022 mb
Low level cloud: 58%
Mid level cloud: 0%
High level cloud: 16%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WNW
WNW

 5 / 11 mph 62 / 62°F 98% 1015 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.4 In
19:00

S
S

 5 / 10 mph 64 / 64°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Fri 12
Sep		01:00

NNW
NNW

 4 / 9 mph 46 / 44°F 98% 1019 mb
Low level cloud: 6%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
07:00

NW
NW

 9 / 17 mph 55 / 52°F 93% 1019 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.3 In
13:00

N
N

 6 / 12 mph 68 / 68°F 35% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
0.0 In
19:00

NW
NW

 5 / 11 mph 53 / 51°F 65% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sat 13
Sep		01:00

NNW
NNW

 4 / 9 mph 50 / 49°F 74% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
07:00

N
N

 2 / 4 mph 54 / 55°F 64% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

NNW
NNW

 10 / 20 mph 66 / 66°F 34% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
19:00

NW
NW

 3 / 6 mph 58 / 59°F 61% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 14
Sep		01:00

N
N

 5 / 11 mph 40 / 36°F 64% 1026 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

NNE
NNE

 4 / 8 mph 54 / 53°F 66% 1029 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 33%
Most Significant Cloud Type: medium
8%
0.0 In
13:00

NNE
NNE

 5 / 11 mph 62 / 62°F 30% 1025 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
19:00

NE
NE

 3 / 5 mph 53 / 53°F 77% 1032 mb
Low level cloud: 8%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
65%
0.0 In
Mon 15
Sep		01:00

NNW
NNW

 2 / 4 mph 44 / 44°F 70% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
0.0 In
07:00

NE
NE

 4 / 6 mph 48 / 46°F 66% 1035 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
0.0 In
13:00

WNW
WNW

 4 / 9 mph 68 / 68°F 26% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: high
7%
0.0 In
19:00

E
E

 2 / 4 mph 52 / 53°F 56% 1032 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 98%
Most Significant Cloud Type: medium
48%
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