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Clyde River Derby 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Clyde River Derby

Virgin Islands, United States Of America

Long range weather outlook for Clyde River Derby includes 14 day forecast summary:

The next 14 day outlook for Clyde River Derby shows the average daytime maximum temperature will be around 22°C, with a high for the two weeks of 28°C expected on the afternoon of Wednesday 17th. The mean minimum temperature will be 7°C, dipping to its lowest on the morning of Saturday 20th at 0°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Friday 19th will have the most precipitation with an accumulation of around 26.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 10
Sep		16:00

WSW
WSW

 2 / 2 mph 76 / 75°F 35% 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
19:00

NNW
NNW

 2 / 3 mph 55 / 54°F 71% 1021 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 19%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 2 / 4 mph 50 / 50°F 88% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 11
Sep		01:00

S
S

 2 / 3 mph 48 / 48°F 91% 1021 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 1 / 2 mph 46 / 46°F 93% 1020 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNW
NNW

 1 / 2 mph 56 / 54°F 80% 1021 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

 5 / 6 mph 70 / 68°F 55% 1021 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

 9 / 10 mph 73 / 76°F 50% 1020 mb
Low level cloud: 32%
Mid level cloud: 50%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

N
N

 6 / 9 mph 67 / 64°F 68% 1021 mb
Low level cloud: 33%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 4 / 8 mph 60 / 59°F 71% 1022 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 3 / 6 mph 48 / 47°F 91% 1024 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
Fri 12
Sep		01:00

E
E

 0 / 1 mph 46 / 46°F 91% 1025 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
04:00

ESE
ESE

 1 / 2 mph 42 / 42°F 90% 1025 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
07:00

E
E

 1 / 1 mph 51 / 50°F 73% 1025 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
10:00

N
N

 3 / 3 mph 67 / 65°F 41% 1025 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
13:00

NNW
NNW

 3 / 4 mph 73 / 74°F 34% 1023 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
16:00

NNW
NNW

 3 / 4 mph 73 / 75°F 38% 1022 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
19:00

N
N

 1 / 3 mph 50 / 50°F 69% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 89%
Most Significant Cloud Type: high
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 1 / 2 mph 49 / 49°F 72% 1022 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 13
Sep		01:00

S
S

 3 / 6 mph 48 / 47°F 68% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 4 / 8 mph 47 / 45°F 73% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 3 / 6 mph 54 / 53°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 100%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 4 / 4 mph 69 / 67°F 53% 1019 mb
Low level cloud: 0%
Mid level cloud: 42%
High level cloud: 100%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 4 / 4 mph 74 / 76°F 49% 1016 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

 5 / 6 mph 74 / 76°F 57% 1015 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 3%
Most Significant Cloud Type: medium
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 3 / 6 mph 56 / 55°F 88% 1015 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 3%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 8 mph 54 / 53°F 88% 1015 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 3%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 14
Sep		01:00

S
S

 4 / 8 mph 52 / 52°F 93% 1015 mb
Low level cloud: 0%
Mid level cloud: 61%
High level cloud: 18%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 3 / 6 mph 51 / 51°F 96% 1015 mb
Low level cloud: 4%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

 0 / 1 mph 58 / 57°F 89% 1016 mb
Low level cloud: 8%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

 4 / 5 mph 72 / 76°F 60% 1015 mb
Low level cloud: 9%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNW
NNW

 8 / 10 mph 72 / 76°F 67% 1016 mb
Low level cloud: 22%
Mid level cloud: 17%
High level cloud: 3%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 7 / 9 mph 72 / 76°F 58% 1016 mb
Low level cloud: 65%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 3 / 7 mph 54 / 53°F 87% 1020 mb
Low level cloud: 9%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

ESE
ESE

 1 / 2 mph 48 / 48°F 90% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 36%
Most Significant Cloud Type: high
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 15
Sep		01:00

S
S

 2 / 3 mph 47 / 47°F 91% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 1 / 2 mph 44 / 44°F 91% 1023 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 40%
Most Significant Cloud Type: high
39%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 1 / 2 mph 54 / 53°F 77% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 1%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNW
NNW

 1 / 1 mph 71 / 68°F 48% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

 2 / 2 mph 75 / 76°F 38% 1023 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 41%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NNW
NNW

 3 / 4 mph 73 / 76°F 49% 1022 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 95%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

N
N

 1 / 3 mph 53 / 53°F 77% 1024 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 1 / 2 mph 50 / 50°F 88% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 16
Sep		01:00

SSE
SSE

 2 / 5 mph 48 / 48°F 91% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 3 / 6 mph 46 / 45°F 92% 1024 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 2 / 4 mph 55 / 55°F 76% 1024 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 2%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 3 / 3 mph 72 / 76°F 46% 1022 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 6%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 5 / 6 mph 77 / 76°F 39% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 8%
Most Significant Cloud Type: high
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 6 / 6 mph 75 / 76°F 49% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 2 / 4 mph 58 / 59°F 75% 1020 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 8 mph 53 / 53°F 79% 1020 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 19%
Most Significant Cloud Type: high
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 17
Sep		01:00

NE
NE

 3 / 6 mph 49 / 49°F 98% 1025 mb
Low level cloud: 24%
Mid level cloud: 24%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
07:00

S
S

 2 / 4 mph 60 / 60°F 73% 1019 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 34%
Most Significant Cloud Type: medium
44%
0.0 In
13:00

SSW
SSW

 6 / 7 mph 83 / 82°F 39% 1017 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
0.0 In
19:00

SSE
SSE

 4 / 9 mph 60 / 60°F 71% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Thu 18
Sep		01:00

SSE
SSE

 6 / 12 mph 54 / 52°F 94% 1017 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 24%
Most Significant Cloud Type: medium
11%
0.0 In
07:00

S
S

 5 / 11 mph 60 / 60°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
6%
0.0 In
13:00

S
S

 11 / 24 mph 81 / 81°F 43% 1013 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 28%
Most Significant Cloud Type: medium
44%
0.0 In
19:00

SSW
SSW

 4 / 7 mph 63 / 63°F 98% 1012 mb
Low level cloud: 23%
Mid level cloud: 40%
High level cloud: 80%
Most Significant Cloud Type: low
100%
0.0 In
Fri 19
Sep		01:00

S
S

 8 / 16 mph 61 / 61°F 96% 1009 mb
Low level cloud: 28%
Mid level cloud: 32%
High level cloud: 98%
Most Significant Cloud Type: low
51%
0.1 In
07:00

NNW
NNW

 9 / 16 mph 52 / 49°F 98% 1008 mb
Low level cloud: 99%
Mid level cloud: 98%
High level cloud: 93%
Most Significant Cloud Type: low
100%
0.1 In
13:00

NNW
NNW

 8 / 16 mph 60 / 60°F 79% 1011 mb
Low level cloud: 67%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.3 In
19:00

WSW
WSW

 4 / 8 mph 40 / 38°F 92% 1020 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.9 In
Sat 20
Sep		01:00

NW
NW

 5 / 11 mph 38 / 33°F 94% 1019 mb
Low level cloud: 37%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.1 In
07:00

NW
NW

 2 / 4 mph 40 / 39°F 71% 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

NW
NW

 11 / 23 mph 53 / 49°F 46% 1017 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 43%
Most Significant Cloud Type: medium
10%
0.0 In
19:00

N
N

 1 / 1 mph 39 / 39°F 71% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 21
Sep		01:00

SSW
SSW

 2 / 3 mph 38 / 38°F 74% 1017 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 6%
Most Significant Cloud Type: medium
23%
0.0 In
07:00

SSE
SSE

 3 / 6 mph 41 / 38°F 62% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
0.0 In
13:00

S
S

 3 / 6 mph 59 / 60°F 41% 1010 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 92%
Most Significant Cloud Type: medium
51%
0.0 In
19:00

SSE
SSE

 6 / 12 mph 44 / 41°F 56% 1026 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 20%
Most Significant Cloud Type: medium
19%
0.0 In
Mon 22
Sep		01:00

NE
NE

 0 / 1 mph 48 / 48°F 99% 1008 mb
Low level cloud: 92%
Mid level cloud: 66%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.3 In
07:00

S
S

 10 / 18 mph 48 / 44°F 93% 1023 mb
Low level cloud: 42%
Mid level cloud: 92%
High level cloud: 5%
Most Significant Cloud Type: low
74%
0.1 In
13:00

N
N

 6 / 13 mph 55 / 53°F 57% 1008 mb
Low level cloud: 40%
Mid level cloud: 15%
High level cloud: 94%
Most Significant Cloud Type: low
56%
0.0 In
19:00

S
S

 9 / 16 mph 55 / 53°F 97% 1018 mb
Low level cloud: 85%
Mid level cloud: 45%
High level cloud: 56%
Most Significant Cloud Type: low
100%
0.4 In
Tue 23
Sep		01:00

NW
NW

 2 / 4 mph 37 / 37°F 94% 1008 mb
Low level cloud: 4%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
0.0 In
07:00

S
S

 4 / 7 mph 58 / 58°F 98% 1019 mb
Low level cloud: 79%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
84%
0.0 In
13:00

NW
NW

 9 / 18 mph 55 / 53°F 52% 1012 mb
Low level cloud: 22%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
37%
0.0 In
19:00

NE
NE

 1 / 2 mph 55 / 55°F 95% 1019 mb
Low level cloud: 70%
Mid level cloud: 45%
High level cloud: 7%
Most Significant Cloud Type: low
86%
0.0 In
Wed 24
Sep		01:00

WSW
WSW

 2 / 5 mph 35 / 33°F 93% 1021 mb
Low level cloud: 81%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
96%
0.0 In
07:00

ENE
ENE

 2 / 4 mph 54 / 54°F 93% 1019 mb
Low level cloud: 75%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WNW
WNW

 8 / 17 mph 55 / 52°F 41% 1028 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
19:00

NW
NW

 4 / 8 mph 46 / 44°F 98% 1021 mb
Low level cloud: 99%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
Thu 25
Sep		01:00

S
S

 5 / 10 mph 35 / 31°F 72% 1031 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
07:00

SW
SW

 2 / 4 mph 44 / 44°F 97% 1022 mb
Low level cloud: 93%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
13:00

WSW
WSW

 9 / 18 mph 68 / 68°F 32% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
31%
0.0 In
19:00

SW
SW

 3 / 7 mph 42 / 40°F 75% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
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