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Greenbrier 14 Day Long Range Forecast

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

Arkansas, United States Of America

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

For Greenbrier in the coming two weeks the average daytime maximum temperature will be around 30°C, with a high for the two weeks of 35°C expected on the afternoon of Monday 27th. The mean minimum temperature will be 18°C, dipping to its lowest on the morning of Wednesday 29th at 13°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Friday 24th will have the most precipitation with an accumulation of around 34.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 21
May		00:00

S
S

 4 / 10 mph 69 / 69°F 88% 1011 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

 5 / 10 mph 66 / 66°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

S
S

 6 / 12 mph 67 / 67°F 89% 1011 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
09:00

SSW
SSW

 14 / 16 mph 82 / 83°F 64% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 15 / 17 mph 88 / 90°F 48% 1009 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 22%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 14 / 17 mph 90 / 94°F 51% 1007 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 44%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

 10 / 18 mph 83 / 86°F 71% 1007 mb
Low level cloud: 2%
Mid level cloud: 18%
High level cloud: 11%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSW
SSW

 6 / 13 mph 74 / 78°F 92% 1008 mb
Low level cloud: 27%
Mid level cloud: 21%
High level cloud: 70%
Most Significant Cloud Type: low
42%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
Wed 22
May		18:00

WSW
WSW

 7 / 11 mph 74 / 76°F 94% 1011 mb
Low level cloud: 14%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
36%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
21:00

SSW
SSW

 3 / 4 mph 66 / 66°F 95% 1012 mb
Low level cloud: 27%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May		00:00

S
S

 7 / 10 mph 64 / 64°F 98% 1012 mb
Low level cloud: 86%
Mid level cloud: 4%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

 4 / 6 mph 65 / 65°F 99% 1013 mb
Low level cloud: 89%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
91%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

WNW
WNW

 3 / 4 mph 66 / 66°F 97% 1013 mb
Low level cloud: 91%
Mid level cloud: 45%
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

SSW
SSW

 9 / 12 mph 73 / 77°F 87% 1012 mb
Low level cloud: 99%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

SSW
SSW

 6 / 8 mph 82 / 84°F 76% 1011 mb
Low level cloud: 74%
Mid level cloud: 24%
High level cloud: 16%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

 2 / 5 mph 83 / 85°F 79% 1010 mb
Low level cloud: 25%
Mid level cloud: 63%
High level cloud: 22%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

 4 / 9 mph 81 / 82°F 84% 1009 mb
Low level cloud: 13%
Mid level cloud: 24%
High level cloud: 6%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 5 / 10 mph 69 / 69°F 95% 1009 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 57%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May		00:00

SSE
SSE

 4 / 7 mph 65 / 65°F 97% 1009 mb
Low level cloud: 46%
Mid level cloud: 46%
High level cloud: 98%
Most Significant Cloud Type: low
73%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

ESE
ESE

 6 / 11 mph 65 / 65°F 99% 1009 mb
Low level cloud: 37%
Mid level cloud: 45%
High level cloud: 51%
Most Significant Cloud Type: low
59%
Expect 1.2 In of precipitation over the past 3 hours.
1.2 In
06:00

SE
SE

 6 / 9 mph 69 / 66°F 98% 1009 mb
Low level cloud: 68%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

 9 / 11 mph 74 / 77°F 89% 1009 mb
Low level cloud: 95%
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
12:00

SW
SW

 9 / 11 mph 78 / 80°F 83% 1008 mb
Low level cloud: 86%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

 7 / 10 mph 80 / 83°F 83% 1007 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNW
NNW

 2 / 2 mph 83 / 84°F 86% 1006 mb
Low level cloud: 36%
Mid level cloud: 16%
High level cloud: 10%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ENE
ENE

 4 / 7 mph 75 / 78°F 87% 1008 mb
Low level cloud: 16%
Mid level cloud: 48%
High level cloud: 33%
Most Significant Cloud Type: medium
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 25
May		00:00

E
E

 3 / 6 mph 73 / 77°F 93% 1008 mb
Low level cloud: 3%
Mid level cloud: 43%
High level cloud: 4%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

 2 / 4 mph 71 / 71°F 96% 1008 mb
Low level cloud: 17%
Mid level cloud: 30%
High level cloud: 12%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 2 / 4 mph 75 / 76°F 97% 1009 mb
Low level cloud: 51%
Mid level cloud: 15%
High level cloud: 18%
Most Significant Cloud Type: low
58%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
09:00

SE
SE

 6 / 9 mph 78 / 82°F 89% 1009 mb
Low level cloud: 94%
Mid level cloud: 15%
High level cloud: 13%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

S
S

 6 / 7 mph 91 / 94°F 53% 1007 mb
Low level cloud: 9%
Mid level cloud: 18%
High level cloud: 7%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

 7 / 12 mph 89 / 92°F 67% 1005 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 10 / 19 mph 83 / 86°F 78% 1004 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 94%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SSE
SSE

 8 / 16 mph 75 / 79°F 90% 1004 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
30%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Sun 26
May		00:00

SSW
SSW

 11 / 23 mph 75 / 79°F 89% 1002 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SSW
SSW

 10 / 19 mph 73 / 77°F 89% 1002 mb
Low level cloud: 26%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSW
SSW

 10 / 17 mph 73 / 76°F 91% 1004 mb
Low level cloud: 53%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SW
SW

 13 / 15 mph 80 / 84°F 75% 1003 mb
Low level cloud: 98%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

 13 / 16 mph 91 / 98°F 55% 1002 mb
Low level cloud: 5%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 14 / 17 mph 93 / 100°F 53% 1001 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

 8 / 17 mph 88 / 93°F 64% 1001 mb
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
21:00

WNW
WNW

 3 / 6 mph 76 / 80°F 79% 1004 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 27
May		00:00

N
N

 6 / 13 mph 71 / 71°F 90% 1005 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
03:00

ENE
ENE

 5 / 9 mph 68 / 68°F 96% 1006 mb
Low level cloud: 9%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 4 / 8 mph 70 / 67°F 96% 1007 mb
Low level cloud: 34%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

E
E

 7 / 9 mph 75 / 79°F 91% 1008 mb
Low level cloud: 97%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

ESE
ESE

 7 / 10 mph 82 / 86°F 91% 1006 mb
Low level cloud: 74%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

 10 / 14 mph 96 / 104°F 50% 1003 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
18:00

W
W

 14 / 26 mph 87 / 90°F 58% 1003 mb
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

WNW
WNW

 19 / 27 mph 70 / 70°F 80% 1006 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Tue 28
May		00:00

NW
NW

 3 / 6 mph 77 / 82°F 90% 1011 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
06:00

NNE
NNE

 4 / 8 mph 67 / 67°F 79% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

N
N

 7 / 15 mph 84 / 84°F 37% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
0%
0.0 In
18:00

NNW
NNW

 9 / 18 mph 71 / 71°F 63% 1014 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 14%
Most Significant Cloud Type: medium
11%
0.0 In
Wed 29
May		00:00

NNW
NNW

 6 / 13 mph 56 / 54°F 71% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

WNW
WNW

 5 / 11 mph 57 / 57°F 90% 1020 mb
Low level cloud: 2%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
1%
0.0 In
12:00

N
N

 6 / 12 mph 79 / 80°F 44% 1020 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
18:00

N
N

 4 / 8 mph 80 / 83°F 64% 1017 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.0 In
Thu 30
May		00:00

S
S

 3 / 6 mph 65 / 65°F 90% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNE
NNE

 4 / 9 mph 60 / 60°F 86% 1019 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
12:00

SSE
SSE

 8 / 16 mph 82 / 83°F 49% 1018 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

E
E

 4 / 8 mph 77 / 80°F 63% 1016 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 7%
Most Significant Cloud Type: medium
25%
0.0 In
Fri 31
May		00:00

S
S

 5 / 10 mph 65 / 65°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: high
1%
0.0 In
06:00

E
E

 3 / 7 mph 63 / 63°F 75% 1018 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 4%
Most Significant Cloud Type: medium
44%
0.0 In
12:00

S
S

 8 / 16 mph 85 / 86°F 47% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
18:00

E
E

 6 / 13 mph 70 / 70°F 79% 1015 mb
Low level cloud: 12%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
81%
0.0 In
Sat 01
Jun		00:00

SSE
SSE

 4 / 8 mph 68 / 68°F 84% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

ESE
ESE

 9 / 19 mph 62 / 62°F 92% 1016 mb
Low level cloud: 38%
Mid level cloud: 46%
High level cloud: 80%
Most Significant Cloud Type: low
63%
0.0 In
12:00

SSE
SSE

 13 / 28 mph 84 / 86°F 50% 1014 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 53%
Most Significant Cloud Type: medium
26%
0.0 In
18:00

E
E

 8 / 17 mph 68 / 68°F 97% 1015 mb
Low level cloud: 96%
Mid level cloud: 71%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.7 In
Sun 02
Jun		00:00

S
S

 4 / 8 mph 68 / 68°F 76% 1015 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

NNE
NNE

 4 / 8 mph 64 / 64°F 98% 1019 mb
Low level cloud: 94%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNW
NNW

 2 / 5 mph 72 / 77°F 91% 1018 mb
Low level cloud: 25%
Mid level cloud: 77%
High level cloud: 44%
Most Significant Cloud Type: medium
100%
0.1 In
18:00

ENE
ENE

 6 / 12 mph 73 / 77°F 81% 1018 mb
Low level cloud: 67%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
Mon 03
Jun		00:00

NNW
NNW

 4 / 9 mph 68 / 68°F 94% 1018 mb
Low level cloud: 7%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
47%
0.0 In
06:00

NNW
NNW

 2 / 5 mph 65 / 65°F 95% 1018 mb
Low level cloud: 32%
Mid level cloud: 31%
High level cloud: 11%
Most Significant Cloud Type: low
44%
0.0 In
12:00

NE
NE

 5 / 11 mph 83 / 82°F 35% 1020 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
0.0 In
18:00

NNE
NNE

 2 / 4 mph 76 / 80°F 85% 1015 mb
Low level cloud: 8%
Mid level cloud: 46%
High level cloud: 37%
Most Significant Cloud Type: medium
70%
0.1 In
Tue 04
Jun		00:00

NNE
NNE

 7 / 15 mph 63 / 63°F 72% 1020 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
06:00

NE
NE

 5 / 11 mph 62 / 62°F 92% 1014 mb
Low level cloud: 7%
Mid level cloud: 15%
High level cloud: 33%
Most Significant Cloud Type: low
16%
0.0 In
12:00

ENE
ENE

 6 / 12 mph 77 / 78°F 41% 1021 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: medium
9%
0.0 In
18:00

S
S

 5 / 10 mph 72 / 72°F 92% 1012 mb
Low level cloud: 59%
Mid level cloud: 45%
High level cloud: 13%
Most Significant Cloud Type: low
76%
0.0 In
Wed 05
Jun		00:00

NNE
NNE

 4 / 8 mph 66 / 66°F 69% 1019 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 98%
Most Significant Cloud Type: medium
25%
0.0 In
06:00

NNE
NNE

 3 / 6 mph 68 / 68°F 97% 1014 mb
Low level cloud: 85%
Mid level cloud: 12%
High level cloud: 2%
Most Significant Cloud Type: low
89%
0.0 In
12:00

E
E

 4 / 8 mph 67 / 67°F 79% 1022 mb
Low level cloud: 94%
Mid level cloud: 63%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
18:00

SE
SE

 4 / 9 mph 76 / 79°F 78% 1015 mb
Low level cloud: 37%
Mid level cloud: 11%
High level cloud: 39%
Most Significant Cloud Type: low
45%
0.0 In

Other Locations Near to Greenbrier

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