WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Sachs Harbour 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Sachs Harbour

Northwest Territories, Canada

Long range weather outlook for Sachs Harbour includes 14 day forecast summary:

The outlook for Sachs Harbour in the two weeks ahead shows the average daytime maximum temperature will be around 8°C, with a high for the two weeks of 16°C expected on the evening of Tuesday 4th. The average minimum temperature will be 4°C, dipping to its lowest on the morning of Monday 27th at -1°C. The coming 14 days will have mixed overhead conditions with some days dry and some seeing a significant amount of rain, sleet or snow. The current forecast indicates Sunday 26th will have the most precipitation with an accumulation of around 5.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityCloud AmountPrecip AmountWeather
Sun 26
May
06:00

E
E

7 / 13 mph 30 / 24°F 92%
Low level cloud: 100%
Mid level cloud: 59%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

4 / 7 mph 33 / 29°F 93%
Low level cloud: 100%
Mid level cloud: 96%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

E
E

3 / 4 mph 36 / 33°F 96%
Low level cloud: 93%
Mid level cloud: 85%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

3 / 4 mph 37 / 35°F 98%
Low level cloud: 84%
Mid level cloud: 90%
High level cloud: 7%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

E
E

6 / 9 mph 36 / 31°F 96%
Low level cloud: 35%
Mid level cloud: 32%
High level cloud: 17%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

5 / 9 mph 34 / 29°F 96%
Low level cloud: 28%
Mid level cloud: 17%
High level cloud: 19%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May
00:00

E
E

4 / 8 mph 32 / 28°F 93%
Low level cloud: 7%
Mid level cloud: 28%
High level cloud: 20%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

3 / 6 mph 30 / 27°F 93%
Low level cloud: 1%
Mid level cloud: 50%
High level cloud: 22%
Most Significant Cloud Type: medium
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NE
NE

6 / 12 mph 33 / 28°F 88%
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 28%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

3 / 6 mph 36 / 34°F 88%
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 14%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

3 / 5 mph 38 / 37°F 86%
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 33%
Most Significant Cloud Type: medium
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

2 / 4 mph 41 / 41°F 75%
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 47%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

4 / 7 mph 43 / 41°F 69%
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

E
E

5 / 10 mph 44 / 41°F 68%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 32%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 28
May
00:00

E
E

6 / 11 mph 43 / 39°F 68%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 11%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ENE
ENE

6 / 12 mph 41 / 37°F 65%
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 6%
Most Significant Cloud Type: medium
24%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

6 / 13 mph 39 / 35°F 61%
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 5%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

5 / 11 mph 43 / 40°F 56%
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 3%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

2 / 3 mph 47 / 47°F 52%
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 13%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

3 / 4 mph 48 / 48°F 54%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 14%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

4 / 6 mph 47 / 45°F 55%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 9%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

2 / 3 mph 44 / 44°F 53%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 13%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 29
May
00:00

SSE
SSE

1 / 2 mph 44 / 44°F 58%
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 17%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

3 / 7 mph 40 / 38°F 68%
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 11%
Most Significant Cloud Type: medium
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

3 / 6 mph 40 / 39°F 66%
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 5%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

4 / 7 mph 43 / 41°F 59%
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 8%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

7 / 11 mph 45 / 41°F 56%
Low level cloud: 0%
Mid level cloud: 56%
High level cloud: 1%
Most Significant Cloud Type: medium
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

9 / 14 mph 45 / 40°F 55%
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
18:00

WSW
WSW

9 / 13 mph 43 / 38°F 56%
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

W
W

6 / 10 mph 42 / 38°F 58%
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 30
May
00:00

W
W

4 / 9 mph 37 / 33°F 62%
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
03:00

WSW
WSW

4 / 8 mph 35 / 31°F 67%
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
06:00

WSW
WSW

5 / 11 mph 34 / 29°F 71%
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WSW
WSW

7 / 11 mph 37 / 31°F 71%
Low level cloud: 0%
Mid level cloud: 63%
High level cloud: 8%
Most Significant Cloud Type: medium
62%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

9 / 11 mph 40 / 34°F 79%
Low level cloud: 16%
Mid level cloud: 45%
High level cloud: 2%
Most Significant Cloud Type: medium
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

W
W

10 / 11 mph 42 / 36°F 78%
Low level cloud: 11%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

9 / 11 mph 40 / 34°F 76%
Low level cloud: 80%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

WNW
WNW

8 / 9 mph 38 / 32°F 79%
Low level cloud: 94%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 31
May
00:00

NW
NW

5 / 9 mph 34 / 29°F 83%
Low level cloud: 90%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

5 / 9 mph 33 / 28°F 86%
Low level cloud: 99%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

7 / 11 mph 32 / 26°F 86%
Low level cloud: 99%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

7 / 11 mph 34 / 28°F 83%
Low level cloud: 92%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

6 / 9 mph 36 / 30°F 82%
Low level cloud: 98%
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
15:00

N
N

8 / 11 mph 37 / 31°F 82%
Low level cloud: 93%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

10 / 13 mph 36 / 28°F 83%
Low level cloud: 89%
Mid level cloud: 10%
High level cloud: 1%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

10 / 13 mph 34 / 27°F 81%
Low level cloud: 91%
Mid level cloud: 1%
High level cloud: 3%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 01
Jun
00:00

N
N

9 / 13 mph 32 / 24°F 82%
Low level cloud: 100%
Mid level cloud: 9%
High level cloud: 6%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

10 / 15 mph 31 / 23°F 84%
Low level cloud: 99%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

10 / 16 mph 31 / 22°F 83%
Low level cloud: 96%
Mid level cloud: 36%
High level cloud: 32%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

11 / 16 mph 32 / 23°F 81%
Low level cloud: 93%
Mid level cloud: 2%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

9 / 12 mph 36 / 30°F 72%
Low level cloud: 49%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

10 / 14 mph 40 / 34°F 65%
Low level cloud: 36%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

11 / 16 mph 41 / 35°F 63%
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 43%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

12 / 19 mph 42 / 35°F 60%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityCloud AmountPrecip AmountWeather
Sun 02
Jun
00:00

ENE
ENE

4 / 8 mph 40 / 37°F 86%
Low level cloud: 100%
Mid level cloud: 91%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SE
SE

2 / 3 mph 35 / 35°F 79%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

SSE
SSE

22 / 31 mph 48 / 40°F 66%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 53%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

S
S

6 / 8 mph 44 / 41°F 45%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
Mon 03
Jun
00:00

ENE
ENE

15 / 24 mph 44 / 37°F 55%
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 18%
Most Significant Cloud Type: medium
100%
0.0 In
06:00

ENE
ENE

16 / 28 mph 39 / 29°F 59%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 97%
Most Significant Cloud Type: medium
13%
0.0 In
12:00

ESE
ESE

21 / 30 mph 51 / 44°F 52%
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 33%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

SSE
SSE

10 / 17 mph 55 / 53°F 39%
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 38%
Most Significant Cloud Type: medium
6%
0.0 In
Tue 04
Jun
00:00

E
E

21 / 34 mph 51 / 44°F 57%
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 50%
Most Significant Cloud Type: medium
34%
0.0 In
06:00

ESE
ESE

14 / 24 mph 47 / 41°F 80%
Low level cloud: 97%
Mid level cloud: 89%
High level cloud: 32%
Most Significant Cloud Type: low
100%
0.0 In
12:00

E
E

21 / 33 mph 56 / 51°F 57%
Low level cloud: 0%
Mid level cloud: 78%
High level cloud: 6%
Most Significant Cloud Type: medium
78%
0.0 In
18:00

SE
SE

8 / 16 mph 53 / 51°F 63%
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 12%
Most Significant Cloud Type: medium
97%
0.0 In
Wed 05
Jun
00:00

E
E

18 / 31 mph 55 / 50°F 61%
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 32%
Most Significant Cloud Type: medium
24%
0.0 In
06:00

ESE
ESE

8 / 14 mph 53 / 51°F 74%
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 10%
Most Significant Cloud Type: medium
20%
0.0 In
12:00

SE
SE

16 / 27 mph 58 / 55°F 34%
Low level cloud: 0%
Mid level cloud: 37%
High level cloud: 0%
Most Significant Cloud Type: medium
36%
0.0 In
18:00

SSE
SSE

13 / 23 mph 45 / 39°F 80%
Low level cloud: 1%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
0.0 In
Thu 06
Jun
00:00

NE
NE

3 / 5 mph 55 / 55°F 41%
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
0.0 In
06:00

SSE
SSE

12 / 23 mph 41 / 34°F 89%
Low level cloud: 10%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: low
21%
0.0 In
12:00

WSW
WSW

2 / 2 mph 57 / 57°F 43%
Low level cloud: 0%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
0.0 In
18:00

SSW
SSW

11 / 17 mph 36 / 28°F 85%
Low level cloud: 91%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
95%
0.0 In
Fri 07
Jun
00:00

ESE
ESE

4 / 8 mph 52 / 51°F 54%
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
0.0 In
06:00

NE
NE

13 / 25 mph 47 / 42°F 72%
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 21%
Most Significant Cloud Type: medium
46%
0.0 In
12:00

NNE
NNE

6 / 10 mph 59 / 59°F 43%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
18:00

NE
NE

23 / 38 mph 51 / 44°F 92%
Low level cloud: 100%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.6 In
Sat 08
Jun
00:00

NNE
NNE

11 / 19 mph 52 / 48°F 50%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

NW
NW

21 / 32 mph 33 / 21°F 94%
Low level cloud: 100%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.3 In
12:00

ESE
ESE

2 / 4 mph 61 / 61°F 41%
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 5%
Most Significant Cloud Type: medium
8%
0.0 In
18:00

NNW
NNW

6 / 10 mph 43 / 39°F 62%
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 09
Jun
00:00

ESE
ESE

6 / 11 mph 61 / 61°F 46%
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

SSE
SSE

6 / 13 mph 43 / 39°F 62%
Low level cloud: 0%
Mid level cloud: 97%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

ESE
ESE

7 / 13 mph 64 / 64°F 42%
Low level cloud: 0%
Mid level cloud: 71%
High level cloud: 92%
Most Significant Cloud Type: medium
74%
0.0 In
18:00

SSE
SSE

4 / 7 mph 61 / 60°F 36%
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 32%
Most Significant Cloud Type: medium
11%
0.0 In
Mon 10
Jun
00:00

E
E

16 / 28 mph 63 / 63°F 40%
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.0 In
06:00

NNE
NNE

9 / 16 mph 56 / 54°F 44%
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 29%
Most Significant Cloud Type: medium
8%
0.0 In
12:00

SSE
SSE

11 / 19 mph 64 / 64°F 40%
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: medium
44%
0.0 In
18:00

NNW
NNW

20 / 25 mph 40 / 30°F 68%
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In

The day label given represents the local day relative to the local time for the location you are looking at.
(More Info)

Day

This time is corrected for local time zones and where possible for daylight saving times.
(More Info)

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.
(More Info)

Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
(More Info)

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.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
(More Info)

Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
(More Info)

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.
(More Info)

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.
(More Info)

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.
(More Info)

Pressure