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Lensk 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Lensk

Russia

Long range weather outlook for Lensk includes 14 day forecast summary:

The next 14 day outlook for Lensk shows the average daytime maximum temperature will be around -18°C, with a high for the two weeks of -9°C expected on the afternoon of Friday 14th. The average minimum temperature will be -34°C, dipping to its lowest on the morning of Thursday 6th at -42°C. The next 14 days will remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 05
Feb		16:00

NNW
NNW

 4 / 4 mph -20 / -31°F 89% 1040 mb
Low level cloud: 100%
Mid level cloud: 22%
High level cloud: 17%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNW
NNW

 2 / 3 mph -33 / -33°F 99% 1043 mb
Low level cloud: 96%
Mid level cloud: 14%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

 0 / 1 mph -39 / -39°F 100% 1046 mb
Low level cloud: 97%
Mid level cloud: 11%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 06
Feb		01:00

SW
SW

 2 / 5 mph -41 / -51°F 100% 1048 mb
Low level cloud: 99%
Mid level cloud: 8%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

 3 / 6 mph -43 / -55°F 100% 1050 mb
Low level cloud: 100%
Mid level cloud: 7%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

 3 / 6 mph -44 / -57°F 100% 1052 mb
Low level cloud: 96%
Mid level cloud: 6%
High level cloud: 12%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 4 / 7 mph -43 / -58°F 99% 1053 mb
Low level cloud: 90%
Mid level cloud: 9%
High level cloud: 12%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 4 mph -25 / -37°F 92% 1053 mb
Low level cloud: 67%
Mid level cloud: 11%
High level cloud: 2%
Most Significant Cloud Type: low
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 4 / 5 mph -17 / -28°F 86% 1052 mb
Low level cloud: 55%
Mid level cloud: 9%
High level cloud: 4%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 3 / 7 mph -30 / -41°F 97% 1053 mb
Low level cloud: 35%
Mid level cloud: 7%
High level cloud: 4%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 8 mph -35 / -49°F 99% 1054 mb
Low level cloud: 36%
Mid level cloud: 7%
High level cloud: 2%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 07
Feb		01:00

S
S

 4 / 8 mph -38 / -52°F 99% 1055 mb
Low level cloud: 48%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 8 mph -39 / -53°F 99% 1054 mb
Low level cloud: 53%
Mid level cloud: 3%
High level cloud: 2%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 4 / 8 mph -39 / -54°F 99% 1053 mb
Low level cloud: 62%
Mid level cloud: 2%
High level cloud: 4%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 4 / 8 mph -39 / -54°F 99% 1054 mb
Low level cloud: 54%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 5 mph -20 / -32°F 90% 1051 mb
Low level cloud: 38%
Mid level cloud: 1%
High level cloud: 5%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 5 / 5 mph -11 / -23°F 82% 1048 mb
Low level cloud: 4%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 3 / 7 mph -26 / -37°F 96% 1048 mb
Low level cloud: 12%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 9 mph -32 / -46°F 99% 1048 mb
Low level cloud: 6%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 08
Feb		01:00

S
S

 4 / 9 mph -34 / -49°F 99% 1047 mb
Low level cloud: 14%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 9 mph -35 / -50°F 99% 1046 mb
Low level cloud: 26%
Mid level cloud: 2%
High level cloud: 6%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 4 / 9 mph -36 / -50°F 100% 1044 mb
Low level cloud: 21%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 4 / 9 mph -36 / -51°F 97% 1043 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
13:00

SSW
SSW

 5 / 7 mph -15 / -29°F 82% 1040 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 6 / 8 mph -7 / -20°F 76% 1036 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 4 / 9 mph -22 / -34°F 95% 1036 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 9 mph -27 / -41°F 98% 1035 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 09
Feb		01:00

S
S

 4 / 9 mph -28 / -42°F 97% 1034 mb
Low level cloud: 12%
Mid level cloud: 11%
High level cloud: 32%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 9 mph -28 / -42°F 96% 1033 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 97%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSE
SSE

 4 / 8 mph -30 / -43°F 93% 1032 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 81%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

 4 / 8 mph -31 / -44°F 91% 1032 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
13:00

SSE
SSE

 2 / 5 mph -9 / -16°F 70% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 2 / 2 mph 3 / -1°F 67% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 71%
Most Significant Cloud Type: high
71%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SE
SE

 3 / 6 mph -16 / -24°F 94% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 33%
Most Significant Cloud Type: high
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 3 / 6 mph -26 / -37°F 99% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 10
Feb		01:00

SSE
SSE

 2 / 5 mph -30 / -39°F 100% 1030 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSE
SSE

 2 / 5 mph -32 / -41°F 100% 1030 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
07:00

SSE
SSE

 2 / 5 mph -34 / -43°F 100% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 21%
Most Significant Cloud Type: high
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

S
S

 2 / 5 mph -35 / -44°F 100% 1031 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 1 / 2 mph -9 / -9°F 81% 1029 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

SSW
SSW

 1 / 1 mph 4 / 4°F 72% 1027 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
19:00

SSE
SSE

 2 / 4 mph -13 / -18°F 95% 1029 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 9%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 3 / 6 mph -21 / -30°F 99% 1030 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 11
Feb		01:00

S
S

 3 / 7 mph -24 / -34°F 98% 1031 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 18%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

 4 / 7 mph -25 / -37°F 98% 1032 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 20%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

 4 / 8 mph -27 / -39°F 100% 1033 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 31%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 4 / 8 mph -26 / -39°F 99% 1033 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 33%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 4 / 6 mph -4 / -13°F 81% 1031 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 29%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

 3 / 4 mph 6 / -1°F 75% 1030 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 29%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

 3 / 6 mph -9 / -16°F 95% 1030 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 36%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

 4 / 7 mph -17 / -27°F 98% 1031 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 12
Feb		04:00

NNE
NNE

 2 / 4 mph -20 / -26°F 100% 1018 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.0 In
10:00

SSE
SSE

 4 / 9 mph -14 / -26°F 100% 1015 mb
Low level cloud: 72%
Mid level cloud: 93%
High level cloud: 33%
Most Significant Cloud Type: low
100%
0.0 In
16:00

SW
SW

 6 / 6 mph 12 / 2°F 86% 1018 mb
Low level cloud: 100%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
22:00

SE
SE

 4 / 8 mph 3 / -5°F 95% 1007 mb
Low level cloud: 73%
Mid level cloud: 100%
High level cloud: 41%
Most Significant Cloud Type: low
100%
0.0 In
Thu 13
Feb		04:00

S
S

 2 / 5 mph -21 / -28°F 100% 1018 mb
Low level cloud: 54%
Mid level cloud: 28%
High level cloud: 4%
Most Significant Cloud Type: low
64%
0.0 In
10:00

SSE
SSE

 1 / 2 mph -30 / -30°F 100% 1024 mb
Low level cloud: 82%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: low
94%
0.0 In
16:00

SSW
SSW

 4 / 5 mph 13 / 5°F 84% 1013 mb
Low level cloud: 86%
Mid level cloud: 100%
High level cloud: 95%
Most Significant Cloud Type: low
100%
0.0 In
22:00

SE
SE

 2 / 4 mph -19 / -19°F 100% 1024 mb
Low level cloud: 56%
Mid level cloud: 4%
High level cloud: 100%
Most Significant Cloud Type: low
69%
0.0 In
Fri 14
Feb		04:00

S
S

 3 / 6 mph -2 / -9°F 99% 1016 mb
Low level cloud: 84%
Mid level cloud: 100%
High level cloud: 94%
Most Significant Cloud Type: low
100%
0.0 In
10:00

S
S

 2 / 3 mph -22 / -22°F 99% 1026 mb
Low level cloud: 85%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: low
97%
0.0 In
16:00

SW
SW

 5 / 6 mph 15 / 7°F 84% 1016 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 26%
Most Significant Cloud Type: low
100%
0.0 In
22:00

SSE
SSE

 1 / 2 mph -12 / -12°F 100% 1026 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Sat 15
Feb		04:00

SSE
SSE

 2 / 5 mph -13 / -19°F 100% 1020 mb
Low level cloud: 94%
Mid level cloud: 45%
High level cloud: 37%
Most Significant Cloud Type: low
100%
0.0 In
10:00

W
W

 2 / 5 mph -8 / -14°F 100% 1027 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
16:00

NNE
NNE

 1 / 1 mph 12 / 12°F 86% 1019 mb
Low level cloud: 98%
Mid level cloud: 30%
High level cloud: 73%
Most Significant Cloud Type: low
100%
0.0 In
22:00

WNW
WNW

 7 / 11 mph 0 / -13°F 95% 1026 mb
Low level cloud: 72%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: low
90%
0.0 In
Sun 16
Feb		04:00

S
S

 1 / 2 mph -19 / -19°F 100% 1025 mb
Low level cloud: 100%
Mid level cloud: 26%
High level cloud: 25%
Most Significant Cloud Type: low
100%
0.0 In
10:00

WSW
WSW

 4 / 6 mph -8 / -19°F 98% 1026 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
16:00

WSW
WSW

 3 / 4 mph 9 / 3°F 87% 1027 mb
Low level cloud: 100%
Mid level cloud: 44%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.0 In
22:00

WSW
WSW

 4 / 8 mph -3 / -13°F 98% 1025 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 45%
Most Significant Cloud Type: low
100%
0.0 In
Mon 17
Feb		04:00

S
S

 2 / 3 mph -9 / -9°F 100% 1032 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.0 In
10:00

SW
SW

 1 / 3 mph -13 / -13°F 100% 1026 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
16:00

W
W

 5 / 6 mph 10 / 2°F 84% 1034 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
22:00

SSE
SSE

 1 / 2 mph -14 / -14°F 100% 1029 mb
Low level cloud: 88%
Mid level cloud: 100%
High level cloud: 50%
Most Significant Cloud Type: low
100%
0.0 In
Tue 18
Feb		04:00

SSW
SSW

 2 / 5 mph -17 / -24°F 100% 1040 mb
Low level cloud: 100%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
10:00

SSW
SSW

 3 / 6 mph -21 / -30°F 100% 1033 mb
Low level cloud: 100%
Mid level cloud: 79%
High level cloud: 57%
Most Significant Cloud Type: low
100%
0.0 In
16:00

W
W

 2 / 3 mph 10 / 5°F 85% 1039 mb
Low level cloud: 97%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: low
98%
0.0 In
22:00

SSW
SSW

 4 / 8 mph -2 / -11°F 98% 1033 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 9%
Most Significant Cloud Type: low
100%
0.0 In
Wed 19
Feb		04:00

S
S

 2 / 4 mph -20 / -27°F 100% 1042 mb
Low level cloud: 96%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
97%
0.0 In
10:00

S
S

 3 / 7 mph -9 / -18°F 100% 1033 mb
Low level cloud: 100%
Mid level cloud: 45%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
16:00

W
W

 2 / 2 mph 9 / 6°F 85% 1038 mb
Low level cloud: 97%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
22:00

ESE
ESE

 3 / 6 mph -5 / -12°F 96% 1030 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 29%
Most Significant Cloud Type: low
100%
0.0 In
Thu 20
Feb		04:00

SSW
SSW

 3 / 6 mph -20 / -29°F 100% 1039 mb
Low level cloud: 100%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
10:00

ESE
ESE

 1 / 3 mph -10 / -10°F 99% 1028 mb
Low level cloud: 100%
Mid level cloud: 100%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.0 In
16:00

W
W

 3 / 4 mph 9 / 2°F 87% 1033 mb
Low level cloud: 100%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
22:00

ENE
ENE

 3 / 7 mph -6 / -14°F 99% 1022 mb
Low level cloud: 60%
Mid level cloud: 100%
High level cloud: 97%
Most Significant Cloud Type: low
100%
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