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Northolt 14 Day Long Range Forecast

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

Hillingdon, United Kingdom

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

Reviewing the forecast for Northolt Over the next 14 days and the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 20°C expected on the afternoon of Thursday 3rd. The average minimum temperature will be 8°C, dipping to its lowest on the morning of Saturday 28th at 4°C. The fortnight ahead will have some days seeing a little precipitation and some days with rain. Predictions are Friday 27th will have the most precipitation with an accumulation of around 19.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 25
Apr
15:00

WSW
WSW

18 / 23 mph 58 / 53°F 54% 1012 mb
Low level cloud: 13%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.04 In of precipitation over the past 3 hours.
0.04 In
18:00

W
W

16 / 19 mph 55 / 50°F 61% 1012 mb
Low level cloud: 15%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
21:00

WSW
WSW

15 / 19 mph 50 / 44°F 70% 1014 mb
Low level cloud: 6%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 26
Apr
00:00

WSW
WSW

13 / 18 mph 47 / 41°F 72% 1014 mb
Low level cloud: 1%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

W
W

13 / 17 mph 46 / 40°F 74% 1015 mb
Low level cloud: 4%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

W
W

12 / 17 mph 45 / 38°F 76% 1016 mb
Low level cloud: 13%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

W
W

14 / 16 mph 52 / 47°F 59% 1017 mb
Low level cloud: 32%
Mid level cloud: 6%
High level cloud: 10%
Most Significant Cloud Type: low
35%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

W
W

15 / 17 mph 57 / 53°F 47% 1017 mb
Low level cloud: 9%
Mid level cloud: 21%
High level cloud: 32%
Most Significant Cloud Type: low
19%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
15:00

W
W

15 / 18 mph 58 / 54°F 46% 1016 mb
Low level cloud: 2%
Mid level cloud: 21%
High level cloud: 19%
Most Significant Cloud Type: medium
27%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
18:00

WSW
WSW

11 / 12 mph 56 / 52°F 56% 1016 mb
Low level cloud: 1%
Mid level cloud: 27%
High level cloud: 78%
Most Significant Cloud Type: medium
32%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SW
SW

7 / 10 mph 50 / 47°F 69% 1015 mb
Low level cloud: 0%
Mid level cloud: 47%
High level cloud: 86%
Most Significant Cloud Type: medium
50%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Fri 27
Apr
00:00

SW
SW

4 / 5 mph 48 / 47°F 78% 1014 mb
Low level cloud: 59%
Mid level cloud: 74%
High level cloud: 89%
Most Significant Cloud Type: low
95%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
03:00

S
S

5 / 6 mph 47 / 45°F 83% 1011 mb
Low level cloud: 82%
Mid level cloud: 75%
High level cloud: 88%
Most Significant Cloud Type: low
100%
Expect 0.05 In of precipitation over the past 3 hours.
0.05 In
06:00

SE
SE

8 / 11 mph 46 / 41°F 86% 1008 mb
Low level cloud: 89%
Mid level cloud: 83%
High level cloud: 91%
Most Significant Cloud Type: low
100%
Expect 0.12 In of precipitation over the past 3 hours.
0.12 In
09:00

SSE
SSE

9 / 13 mph 47 / 43°F 89% 1004 mb
Low level cloud: 97%
Mid level cloud: 83%
High level cloud: 99%
Most Significant Cloud Type: low
100%
Expect 0.24 In of precipitation over the past 3 hours.
0.24 In
12:00

SE
SE

12 / 15 mph 52 / 48°F 77% 1001 mb
Low level cloud: 91%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
15:00

NNE
NNE

8 / 11 mph 51 / 47°F 87% 1001 mb
Low level cloud: 89%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.25 In of precipitation over the past 3 hours.
0.25 In
18:00

NNW
NNW

15 / 19 mph 48 / 42°F 81% 1005 mb
Low level cloud: 84%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

NNW
NNW

11 / 14 mph 46 / 41°F 80% 1010 mb
Low level cloud: 60%
Mid level cloud: 9%
High level cloud: 2%
Most Significant Cloud Type: low
63%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Sat 28
Apr
00:00

NW
NW

8 / 10 mph 44 / 39°F 85% 1013 mb
Low level cloud: 23%
Mid level cloud: 14%
High level cloud: 97%
Most Significant Cloud Type: low
39%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

WNW
WNW

7 / 10 mph 41 / 37°F 78% 1015 mb
Low level cloud: 0%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: medium
67%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

WNW
WNW

5 / 7 mph 41 / 37°F 74% 1016 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 16%
Most Significant Cloud Type: medium
7%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

NW
NW

3 / 3 mph 51 / 50°F 52% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 39%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SW
SW

2 / 3 mph 60 / 60°F 36% 1017 mb
Low level cloud: 3%
Mid level cloud: 11%
High level cloud: 60%
Most Significant Cloud Type: medium
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

S
S

4 / 5 mph 62 / 59°F 35% 1016 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 27%
Most Significant Cloud Type: medium
32%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
18:00

SW
SW

5 / 6 mph 58 / 56°F 53% 1015 mb
Low level cloud: 25%
Mid level cloud: 66%
High level cloud: 72%
Most Significant Cloud Type: low
56%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

SW
SW

2 / 3 mph 52 / 52°F 66% 1016 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 84%
Most Significant Cloud Type: low
100%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
Sun 29
Apr
00:00

ESE
ESE

3 / 4 mph 50 / 49°F 70% 1014 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 93%
Most Significant Cloud Type: medium
35%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

E
E

6 / 9 mph 47 / 44°F 69% 1013 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 88%
Most Significant Cloud Type: medium
49%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

ENE
ENE

10 / 15 mph 46 / 41°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 94%
Most Significant Cloud Type: medium
51%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

ENE
ENE

14 / 23 mph 48 / 42°F 65% 1011 mb
Low level cloud: 2%
Mid level cloud: 56%
High level cloud: 0%
Most Significant Cloud Type: medium
61%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

ENE
ENE

15 / 18 mph 52 / 46°F 61% 1010 mb
Low level cloud: 30%
Mid level cloud: 69%
High level cloud: 76%
Most Significant Cloud Type: low
62%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
15:00

NE
NE

16 / 18 mph 54 / 48°F 65% 1008 mb
Low level cloud: 28%
Mid level cloud: 63%
High level cloud: 91%
Most Significant Cloud Type: low
61%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:00

NE
NE

17 / 19 mph 52 / 46°F 62% 1007 mb
Low level cloud: 90%
Mid level cloud: 44%
High level cloud: 10%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
21:00

NE
NE

17 / 20 mph 49 / 43°F 67% 1007 mb
Low level cloud: 88%
Mid level cloud: 44%
High level cloud: 73%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Mon 30
Apr
00:00

NE
NE

20 / 26 mph 46 / 38°F 77% 1005 mb
Low level cloud: 93%
Mid level cloud: 51%
High level cloud: 85%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

NNE
NNE

20 / 26 mph 45 / 37°F 83% 1002 mb
Low level cloud: 95%
Mid level cloud: 94%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.07 In of precipitation over the past 3 hours.
0.07 In
06:00

NNE
NNE

21 / 34 mph 44 / 36°F 86% 1001 mb
Low level cloud: 96%
Mid level cloud: 79%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.19 In of precipitation over the past 3 hours.
0.19 In
09:00

NE
NE

18 / 30 mph 46 / 39°F 90% 1000 mb
Low level cloud: 93%
Mid level cloud: 84%
High level cloud: 46%
Most Significant Cloud Type: low
100%
Expect 0.09 In of precipitation over the past 3 hours.
0.09 In
12:00

NE
NE

13 / 21 mph 48 / 42°F 90% 1001 mb
Low level cloud: 95%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.10 In of precipitation over the past 3 hours.
0.10 In
15:00

NE
NE

9 / 11 mph 49 / 45°F 86% 1002 mb
Low level cloud: 90%
Mid level cloud: 71%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.03 In of precipitation over the past 3 hours.
0.03 In
18:00

SSE
SSE

4 / 6 mph 50 / 47°F 84% 1003 mb
Low level cloud: 63%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

SSE
SSE

6 / 8 mph 48 / 46°F 82% 1005 mb
Low level cloud: 15%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Tue 01
May
00:00

ESE
ESE

5 / 8 mph 46 / 43°F 86% 1005 mb
Low level cloud: 39%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
03:00

SE
SE

5 / 9 mph 44 / 41°F 89% 1006 mb
Low level cloud: 31%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
06:00

SE
SE

7 / 10 mph 46 / 41°F 85% 1006 mb
Low level cloud: 48%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
50%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
09:00

SE
SE

9 / 11 mph 51 / 47°F 69% 1008 mb
Low level cloud: 90%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
12:00

SE
SE

10 / 12 mph 52 / 48°F 67% 1008 mb
Low level cloud: 91%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
95%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
15:00

SE
SE

9 / 11 mph 58 / 55°F 53% 1007 mb
Low level cloud: 60%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
18:00

SE
SE

9 / 10 mph 58 / 55°F 60% 1008 mb
Low level cloud: 12%
Mid level cloud: 20%
High level cloud: 2%
Most Significant Cloud Type: low
19%
Expect 0.01 In of precipitation over the past 3 hours.
0.01 In
21:00

E
E

8 / 11 mph 52 / 50°F 73% 1010 mb
Low level cloud: 8%
Mid level cloud: 21%
High level cloud: 44%
Most Significant Cloud Type: low
20%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Wed 02
May
00:00

SW
SW

2 / 2 mph 53 / 53°F 86% 1014 mb
Low level cloud: 13%
Mid level cloud: 59%
High level cloud: 0%
Most Significant Cloud Type: medium
95%
0.01 In
06:00

SSW
SSW

7 / 11 mph 44 / 39°F 81% 1005 mb
Low level cloud: 61%
Mid level cloud: 61%
High level cloud: 77%
Most Significant Cloud Type: low
91%
0.00 In
12:00

ESE
ESE

11 / 12 mph 64 / 64°F 54% 1010 mb
Low level cloud: 26%
Mid level cloud: 15%
High level cloud: 12%
Most Significant Cloud Type: low
32%
0.01 In
18:00

S
S

7 / 8 mph 57 / 56°F 71% 999 mb
Low level cloud: 43%
Mid level cloud: 73%
High level cloud: 15%
Most Significant Cloud Type: low
70%
0.00 In
Thu 03
May
00:00

NW
NW

11 / 14 mph 46 / 40°F 72% 1006 mb
Low level cloud: 37%
Mid level cloud: 54%
High level cloud: 33%
Most Significant Cloud Type: low
59%
0.03 In
06:00

SW
SW

14 / 21 mph 47 / 41°F 79% 992 mb
Low level cloud: 65%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
93%
0.02 In
12:00

WSW
WSW

5 / 6 mph 69 / 69°F 48% 1005 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 3%
Most Significant Cloud Type: medium
2%
0.00 In
18:00

WSW
WSW

9 / 10 mph 71 / 71°F 59% 1003 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.00 In
Fri 04
May
00:00

NW
NW

8 / 9 mph 55 / 53°F 78% 1005 mb
Low level cloud: 12%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
14%
0.01 In
06:00

W
W

4 / 5 mph 53 / 52°F 76% 1005 mb
Low level cloud: 47%
Mid level cloud: 23%
High level cloud: 10%
Most Significant Cloud Type: low
56%
0.00 In
12:00

NW
NW

12 / 14 mph 57 / 54°F 49% 1010 mb
Low level cloud: 17%
Mid level cloud: 26%
High level cloud: 13%
Most Significant Cloud Type: low
27%
0.00 In
18:00

SSW
SSW

9 / 11 mph 61 / 61°F 65% 1006 mb
Low level cloud: 21%
Mid level cloud: 10%
High level cloud: 85%
Most Significant Cloud Type: low
35%
0.01 In
Sat 05
May
00:00

W
W

8 / 9 mph 51 / 48°F 74% 1014 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 84%
Most Significant Cloud Type: medium
25%
0.00 In
06:00

WSW
WSW

7 / 8 mph 49 / 46°F 85% 1011 mb
Low level cloud: 28%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
28%
0.00 In
12:00

SW
SW

16 / 20 mph 55 / 51°F 84% 1013 mb
Low level cloud: 88%
Mid level cloud: 74%
High level cloud: 19%
Most Significant Cloud Type: low
100%
0.03 In
18:00

WNW
WNW

8 / 10 mph 62 / 62°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
0.03 In
Sun 06
May
00:00

WSW
WSW

9 / 13 mph 53 / 49°F 96% 1016 mb
Low level cloud: 47%
Mid level cloud: 43%
High level cloud: 33%
Most Significant Cloud Type: low
65%
0.06 In
06:00

W
W

5 / 6 mph 50 / 48°F 88% 1021 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 14%
Most Significant Cloud Type: low
3%
0.00 In
12:00

WSW
WSW

11 / 13 mph 65 / 65°F 83% 1020 mb
Low level cloud: 81%
Mid level cloud: 46%
High level cloud: 4%
Most Significant Cloud Type: low
97%
0.01 In
18:00

SW
SW

9 / 10 mph 62 / 62°F 75% 1021 mb
Low level cloud: 13%
Mid level cloud: 4%
High level cloud: 33%
Most Significant Cloud Type: low
18%
0.00 In
Mon 07
May
00:00

WSW
WSW

6 / 8 mph 58 / 57°F 97% 1023 mb
Low level cloud: 53%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: low
61%
0.02 In
06:00

S
S

11 / 13 mph 51 / 47°F 91% 1021 mb
Low level cloud: 15%
Mid level cloud: 12%
High level cloud: 15%
Most Significant Cloud Type: low
21%
0.00 In
12:00

SW
SW

2 / 2 mph 67 / 67°F 76% 1024 mb
Low level cloud: 74%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: low
78%
0.00 In
18:00

S
S

13 / 16 mph 57 / 54°F 81% 1019 mb
Low level cloud: 58%
Mid level cloud: 29%
High level cloud: 55%
Most Significant Cloud Type: low
74%
0.01 In
Tue 08
May
00:00

NE
NE

4 / 5 mph 63 / 63°F 94% 1023 mb
Low level cloud: 36%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.02 In
06:00

S
S

6 / 6 mph 54 / 53°F 96% 1019 mb
Low level cloud: 69%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
86%
0.01 In
12:00

ENE
ENE

12 / 15 mph 65 / 65°F 79% 1023 mb
Low level cloud: 72%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
77%
0.01 In
18:00

N
N

8 / 9 mph 60 / 60°F 81% 1018 mb
Low level cloud: 55%
Mid level cloud: 15%
High level cloud: 36%
Most Significant Cloud Type: low
64%
0.04 In
Wed 09
May
00:00

ENE
ENE

13 / 18 mph 52 / 48°F 91% 1024 mb
Low level cloud: 38%
Mid level cloud: 13%
High level cloud: 3%
Most Significant Cloud Type: low
43%
0.01 In
06:00

N
N

11 / 13 mph 49 / 45°F 95% 1020 mb
Low level cloud: 80%
Mid level cloud: 44%
High level cloud: 52%
Most Significant Cloud Type: low
100%
0.06 In
12:00

ENE
ENE

18 / 20 mph 61 / 61°F 66% 1026 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 3%
Most Significant Cloud Type: medium
2%
0.01 In
18:00

NNE
NNE

13 / 17 mph 57 / 54°F 87% 1022 mb
Low level cloud: 79%
Mid level cloud: 6%
High level cloud: 16%
Most Significant Cloud Type: low
83%
0.03 In
Thu 10
May
00:00

NE
NE

13 / 18 mph 45 / 39°F 76% 1027 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: high
2%
0.00 In
06:00

NNE
NNE

10 / 14 mph 54 / 50°F 94% 1025 mb
Low level cloud: 58%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
61%
0.00 In
12:00

ENE
ENE

17 / 19 mph 58 / 55°F 60% 1025 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.00 In
18:00

NE
NE

8 / 9 mph 67 / 67°F 83% 1023 mb
Low level cloud: 59%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
60%
0.00 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