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West Babylon 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for West Babylon

New York, United States Of America

Long range weather outlook for West Babylon includes 14 day forecast summary:

The outlook for West Babylon in the two weeks ahead shows the average daytime maximum temperature will be around 23°C, with a high for the two weeks of 27°C expected on the afternoon of Tuesday 28th. The mean minimum temperature will be 16°C, dipping to its lowest on the evening of Wednesday 29th at 13°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 27th will have the most precipitation with an accumulation of around 10.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 26
May		01:00

NNW
NNW

 3 / 5 mph 63 / 63°F 91% 1012 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 6 / 10 mph 61 / 61°F 97% 1012 mb
Low level cloud: 34%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 5 / 7 mph 68 / 65°F 85% 1013 mb
Low level cloud: 11%
Mid level cloud: 25%
High level cloud: 32%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 6 / 6 mph 75 / 76°F 68% 1013 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 8%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 8 / 10 mph 78 / 78°F 62% 1013 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 9 / 11 mph 76 / 77°F 72% 1013 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

 9 / 13 mph 69 / 67°F 89% 1014 mb
Low level cloud: 22%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 9 / 14 mph 64 / 64°F 94% 1014 mb
Low level cloud: 41%
Mid level cloud: 9%
High level cloud: 32%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May		19:00

S
S

 12 / 18 mph 70 / 69°F 96% 1006 mb
Low level cloud: 78%
Mid level cloud: 12%
High level cloud: 4%
Most Significant Cloud Type: low
83%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

SSW
SSW

 13 / 21 mph 66 / 66°F 98% 1006 mb
Low level cloud: 90%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Tue 28
May		01:00

SW
SW

 7 / 11 mph 65 / 65°F 97% 1005 mb
Low level cloud: 34%
Mid level cloud: 10%
High level cloud: 36%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 9 / 16 mph 64 / 64°F 96% 1005 mb
Low level cloud: 46%
Mid level cloud: 14%
High level cloud: 3%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

 10 / 14 mph 68 / 67°F 89% 1006 mb
Low level cloud: 32%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 14 / 17 mph 75 / 77°F 51% 1007 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

WSW
WSW

 15 / 18 mph 80 / 79°F 41% 1006 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
16:00

WSW
WSW

 17 / 23 mph 80 / 79°F 45% 1006 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

 12 / 18 mph 77 / 78°F 50% 1006 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
22:00

WSW
WSW

 10 / 14 mph 72 / 76°F 57% 1008 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May		01:00

WSW
WSW

 11 / 14 mph 68 / 68°F 63% 1008 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

W
W

 10 / 12 mph 66 / 65°F 67% 1008 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

W
W

 13 / 15 mph 66 / 65°F 58% 1010 mb
Low level cloud: 1%
Mid level cloud: 3%
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

W
W

 12 / 14 mph 70 / 69°F 47% 1011 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

 14 / 17 mph 72 / 70°F 45% 1010 mb
Low level cloud: 3%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

 13 / 16 mph 69 / 67°F 52% 1011 mb
Low level cloud: 27%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

 15 / 18 mph 64 / 62°F 55% 1012 mb
Low level cloud: 35%
Mid level cloud: 43%
High level cloud: 32%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

 15 / 17 mph 58 / 55°F 65% 1014 mb
Low level cloud: 33%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May		01:00

WNW
WNW

 12 / 17 mph 58 / 55°F 62% 1014 mb
Low level cloud: 12%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

WNW
WNW

 12 / 15 mph 58 / 55°F 68% 1015 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
07:00

NW
NW

 11 / 13 mph 62 / 61°F 55% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 33%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

 9 / 10 mph 70 / 68°F 40% 1017 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

 6 / 8 mph 75 / 75°F 34% 1015 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
16:00

SSW
SSW

 15 / 18 mph 71 / 70°F 49% 1015 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
19:00

SSW
SSW

 11 / 15 mph 69 / 67°F 61% 1016 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

NW
NW

 10 / 15 mph 66 / 66°F 49% 1016 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 31
May		01:00

N
N

 7 / 9 mph 65 / 65°F 52% 1016 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
04:00

N
N

 7 / 8 mph 62 / 62°F 54% 1016 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
07:00

NNW
NNW

 7 / 9 mph 64 / 62°F 52% 1018 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

N
N

 6 / 6 mph 72 / 69°F 40% 1018 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 3 / 4 mph 75 / 75°F 37% 1017 mb
Low level cloud: 0%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 3 / 3 mph 75 / 75°F 41% 1017 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 4 / 5 mph 73 / 69°F 48% 1018 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNW
NNW

 8 / 11 mph 66 / 66°F 55% 1018 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 01
Jun		01:00

N
N

 9 / 12 mph 64 / 64°F 56% 1018 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
04:00

NNW
NNW

 9 / 13 mph 62 / 62°F 58% 1018 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
07:00

N
N

 11 / 14 mph 65 / 64°F 51% 1020 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
10:00

NNE
NNE

 10 / 12 mph 73 / 75°F 36% 1020 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NE
NE

 6 / 7 mph 78 / 75°F 33% 1020 mb
Low level cloud: 0%
Mid level cloud: 62%
High level cloud: 0%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SE
SE

 9 / 10 mph 71 / 69°F 51% 1021 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
19:00

SE
SE

 8 / 10 mph 67 / 65°F 62% 1022 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 5 / 6 mph 62 / 62°F 68% 1024 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 4%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sun 02
Jun		01:00

NW
NW

 5 / 10 mph 67 / 67°F 44% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 17%
Most Significant Cloud Type: medium
3%
0.0 In
07:00

NNW
NNW

 3 / 5 mph 72 / 76°F 49% 1024 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: medium
3%
0.0 In
13:00

E
E

 7 / 14 mph 77 / 77°F 35% 1023 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
19:00

SSW
SSW

 9 / 20 mph 77 / 79°F 62% 1016 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 6%
Most Significant Cloud Type: medium
26%
0.0 In
Mon 03
Jun		01:00

SW
SW

 10 / 21 mph 64 / 64°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

SSW
SSW

 10 / 19 mph 62 / 62°F 66% 1020 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 96%
Most Significant Cloud Type: medium
47%
0.0 In
13:00

SW
SW

 14 / 28 mph 74 / 77°F 65% 1011 mb
Low level cloud: 2%
Mid level cloud: 29%
High level cloud: 42%
Most Significant Cloud Type: medium
35%
0.0 In
19:00

SSE
SSE

 10 / 20 mph 76 / 79°F 70% 1016 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
Tue 04
Jun		01:00

WSW
WSW

 4 / 8 mph 70 / 70°F 92% 1006 mb
Low level cloud: 10%
Mid level cloud: 19%
High level cloud: 3%
Most Significant Cloud Type: low
16%
0.0 In
07:00

SSW
SSW

 9 / 18 mph 69 / 69°F 79% 1013 mb
Low level cloud: 1%
Mid level cloud: 44%
High level cloud: 24%
Most Significant Cloud Type: medium
47%
0.0 In
13:00

E
E

 14 / 28 mph 67 / 67°F 69% 1012 mb
Low level cloud: 87%
Mid level cloud: 76%
High level cloud: 11%
Most Significant Cloud Type: low
100%
0.0 In
19:00

SW
SW

 9 / 19 mph 66 / 67°F 90% 1010 mb
Low level cloud: 95%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
Wed 05
Jun		01:00

ENE
ENE

 10 / 20 mph 58 / 56°F 75% 1014 mb
Low level cloud: 13%
Mid level cloud: 50%
High level cloud: 98%
Most Significant Cloud Type: medium
89%
0.0 In
07:00

SSW
SSW

 5 / 10 mph 70 / 70°F 87% 1010 mb
Low level cloud: 34%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
13:00

E
E

 13 / 26 mph 67 / 67°F 52% 1015 mb
Low level cloud: 34%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: low
60%
0.0 In
19:00

S
S

 9 / 19 mph 72 / 77°F 87% 1008 mb
Low level cloud: 3%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
0.1 In
Thu 06
Jun		01:00

NE
NE

 10 / 19 mph 60 / 60°F 67% 1016 mb
Low level cloud: 2%
Mid level cloud: 49%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
0.0 In
07:00

S
S

 7 / 14 mph 66 / 66°F 94% 1008 mb
Low level cloud: 64%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: low
95%
0.0 In
13:00

NE
NE

 8 / 16 mph 68 / 68°F 50% 1016 mb
Low level cloud: 62%
Mid level cloud: 89%
High level cloud: 12%
Most Significant Cloud Type: low
95%
0.0 In
19:00

S
S

 19 / 40 mph 69 / 69°F 97% 1002 mb
Low level cloud: 100%
Mid level cloud: 40%
High level cloud: 100%
Most Significant Cloud Type: low
100%
1.2 In
Fri 07
Jun		01:00

WSW
WSW

 4 / 9 mph 62 / 62°F 77% 1016 mb
Low level cloud: 6%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: medium
73%
0.0 In
07:00

S
S

 3 / 7 mph 70 / 70°F 87% 1006 mb
Low level cloud: 8%
Mid level cloud: 22%
High level cloud: 41%
Most Significant Cloud Type: low
20%
0.0 In
13:00

SSW
SSW

 13 / 25 mph 70 / 71°F 57% 1013 mb
Low level cloud: 10%
Mid level cloud: 59%
High level cloud: 33%
Most Significant Cloud Type: medium
89%
0.0 In
19:00

ENE
ENE

 8 / 18 mph 66 / 66°F 98% 1002 mb
Low level cloud: 100%
Mid level cloud: 53%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.2 In
Sat 08
Jun		01:00

SSW
SSW

 20 / 39 mph 62 / 62°F 96% 1003 mb
Low level cloud: 98%
Mid level cloud: 97%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.3 In
07:00

N
N

 14 / 29 mph 67 / 67°F 95% 1003 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 48%
Most Significant Cloud Type: low
100%
0.3 In
13:00

WNW
WNW

 8 / 16 mph 78 / 79°F 49% 995 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
0.3 In
19:00

NNW
NNW

 6 / 12 mph 77 / 80°F 66% 1008 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Sun 09
Jun		01:00

WNW
WNW

 11 / 23 mph 65 / 65°F 68% 999 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 6%
Most Significant Cloud Type: medium
16%
0.0 In
07:00

NNW
NNW

 6 / 14 mph 73 / 77°F 63% 1013 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
13:00

W
W

 10 / 20 mph 75 / 77°F 47% 999 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 0%
Most Significant Cloud Type: medium
47%
0.0 In
19:00

S
S

 10 / 21 mph 75 / 78°F 62% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Mon 10
Jun		01:00

N
N

 6 / 13 mph 67 / 67°F 83% 1000 mb
Low level cloud: 38%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
55%
0.0 In
07:00

WSW
WSW

 9 / 18 mph 74 / 77°F 65% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
13:00

ENE
ENE

 4 / 7 mph 70 / 70°F 69% 1003 mb
Low level cloud: 80%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
89%
0.0 In
19:00

SSW
SSW

 15 / 31 mph 72 / 76°F 75% 1011 mb
Low level cloud: 1%
Mid level cloud: 48%
High level cloud: 13%
Most Significant Cloud Type: medium
50%
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