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Parkersburg 14 Day Long Range Forecast

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

Iowa, United States Of America

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

The forecast for Parkersburg in the coming two weeks is predicting the average daytime maximum temperature will be around 23°C, with a high for the two weeks of 29°C expected on the afternoon of Saturday 18th. The mean minimum temperature will be 13°C, dipping to its lowest on the morning of Saturday 25th at 7°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. The indicators are that Monday 20th will have the most precipitation with an accumulation of around 17.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 16
May
15:00

WNW
WNW

11 / 13 mph 74 / 76°F 48% 1007 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 0%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

4 / 6 mph 73 / 76°F 58% 1006 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 67%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

2 / 4 mph 62 / 62°F 67% 1008 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May
00:00

S
S

4 / 9 mph 59 / 59°F 73% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSW
SSW

4 / 9 mph 58 / 58°F 74% 1008 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
06:00

SSW
SSW

5 / 11 mph 58 / 56°F 78% 1009 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
09:00

SSW
SSW

6 / 7 mph 71 / 68°F 60% 1008 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 8%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

11 / 13 mph 76 / 77°F 52% 1008 mb
Low level cloud: 1%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

13 / 15 mph 77 / 78°F 51% 1006 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

12 / 18 mph 73 / 76°F 63% 1006 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

7 / 15 mph 62 / 62°F 82% 1007 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
Sat 18
May
00:00

S
S

7 / 16 mph 59 / 59°F 87% 1007 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

S
S

8 / 16 mph 58 / 56°F 89% 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
06:00

S
S

9 / 18 mph 61 / 59°F 88% 1008 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSW
SSW

14 / 16 mph 73 / 76°F 69% 1008 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SW
SW

14 / 16 mph 81 / 80°F 52% 1008 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

12 / 14 mph 84 / 83°F 49% 1008 mb
Low level cloud: 0%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: medium
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

8 / 13 mph 77 / 78°F 67% 1009 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
21:00

NNW
NNW

9 / 17 mph 67 / 67°F 70% 1012 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
Sun 19
May
00:00

N
N

7 / 15 mph 59 / 58°F 66% 1013 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNE
NNE

7 / 14 mph 56 / 55°F 67% 1015 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
06:00

ENE
ENE

6 / 13 mph 58 / 55°F 71% 1015 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
09:00

E
E

4 / 4 mph 72 / 68°F 50% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 56%
Most Significant Cloud Type: high
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

7 / 8 mph 76 / 76°F 50% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 46%
Most Significant Cloud Type: medium
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

E
E

4 / 5 mph 75 / 76°F 59% 1012 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 81%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

9 / 14 mph 70 / 68°F 76% 1010 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 16%
Most Significant Cloud Type: medium
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

9 / 19 mph 63 / 64°F 88% 1009 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 100%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

ESE
ESE

15 / 27 mph 64 / 64°F 95% 1007 mb
Low level cloud: 22%
Mid level cloud: 43%
High level cloud: 98%
Most Significant Cloud Type: low
49%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SE
SE

13 / 20 mph 64 / 64°F 95% 1004 mb
Low level cloud: 53%
Mid level cloud: 50%
High level cloud: 92%
Most Significant Cloud Type: low
81%
Expect 0.4 In of precipitation over the past 3 hours.
0.4 In
06:00

SW
SW

13 / 21 mph 65 / 65°F 90% 1004 mb
Low level cloud: 22%
Mid level cloud: 94%
High level cloud: 94%
Most Significant Cloud Type: medium
100%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
09:00

SW
SW

18 / 21 mph 71 / 69°F 81% 1004 mb
Low level cloud: 46%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

14 / 16 mph 75 / 77°F 75% 1004 mb
Low level cloud: 75%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

10 / 12 mph 78 / 79°F 68% 1004 mb
Low level cloud: 8%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

7 / 10 mph 80 / 80°F 72% 1004 mb
Low level cloud: 11%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

7 / 15 mph 68 / 68°F 89% 1005 mb
Low level cloud: 5%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

SSE
SSE

4 / 9 mph 66 / 67°F 89% 1005 mb
Low level cloud: 10%
Mid level cloud: 8%
High level cloud: 32%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

8 / 17 mph 65 / 65°F 91% 1002 mb
Low level cloud: 51%
Mid level cloud: 19%
High level cloud: 12%
Most Significant Cloud Type: low
59%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

12 / 18 mph 69 / 68°F 93% 1001 mb
Low level cloud: 48%
Mid level cloud: 67%
High level cloud: 79%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

14 / 29 mph 72 / 76°F 91% 999 mb
Low level cloud: 97%
Mid level cloud: 45%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
12:00

SSW
SSW

14 / 20 mph 74 / 77°F 88% 997 mb
Low level cloud: 65%
Mid level cloud: 25%
High level cloud: 33%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

17 / 21 mph 64 / 63°F 84% 1000 mb
Low level cloud: 70%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NW
NW

13 / 19 mph 65 / 63°F 77% 1001 mb
Low level cloud: 3%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
33%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

14 / 21 mph 56 / 53°F 82% 1004 mb
Low level cloud: 32%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

WNW
WNW

10 / 17 mph 53 / 49°F 79% 1005 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
03:00

W
W

9 / 15 mph 50 / 47°F 88% 1007 mb
Low level cloud: 2%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

WNW
WNW

12 / 18 mph 52 / 47°F 80% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

10 / 12 mph 63 / 62°F 59% 1010 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WSW
WSW

11 / 12 mph 71 / 69°F 48% 1010 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 3%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

13 / 15 mph 73 / 76°F 46% 1009 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 32%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

12 / 19 mph 69 / 68°F 63% 1009 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

S
S

12 / 25 mph 60 / 60°F 79% 1009 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
May
00:00

SW
SW

5 / 10 mph 55 / 54°F 83% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

S
S

6 / 13 mph 56 / 55°F 83% 1016 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 87%
Most Significant Cloud Type: medium
34%
0.0 In
12:00

S
S

20 / 42 mph 73 / 76°F 62% 1011 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 41%
Most Significant Cloud Type: medium
31%
0.0 In
18:00

NNE
NNE

8 / 16 mph 70 / 70°F 68% 1011 mb
Low level cloud: 52%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
67%
0.0 In
Fri 24
May
00:00

SE
SE

11 / 23 mph 63 / 63°F 83% 1014 mb
Low level cloud: 28%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
34%
0.0 In
06:00

ESE
ESE

14 / 29 mph 53 / 49°F 81% 1012 mb
Low level cloud: 97%
Mid level cloud: 67%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NNW
NNW

6 / 12 mph 72 / 76°F 73% 1002 mb
Low level cloud: 9%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
14%
0.0 In
18:00

WNW
WNW

20 / 42 mph 65 / 65°F 75% 1004 mb
Low level cloud: 6%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
6%
0.0 In
Sat 25
May
00:00

NNW
NNW

8 / 17 mph 56 / 54°F 95% 1007 mb
Low level cloud: 84%
Mid level cloud: 58%
High level cloud: 2%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SW
SW

5 / 11 mph 48 / 46°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
12:00

W
W

22 / 46 mph 54 / 48°F 63% 1012 mb
Low level cloud: 87%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
93%
0.0 In
18:00

NW
NW

6 / 13 mph 62 / 62°F 69% 1015 mb
Low level cloud: 0%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: medium
96%
0.0 In
Sun 26
May
00:00

WNW
WNW

15 / 31 mph 48 / 42°F 81% 1015 mb
Low level cloud: 69%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
06:00

N
N

6 / 13 mph 54 / 52°F 87% 1016 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 33%
Most Significant Cloud Type: medium
33%
0.0 In
12:00

NNW
NNW

15 / 32 mph 52 / 47°F 62% 1023 mb
Low level cloud: 41%
Mid level cloud: 2%
High level cloud: 5%
Most Significant Cloud Type: low
41%
0.0 In
18:00

N
N

10 / 21 mph 62 / 62°F 61% 1018 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: medium
24%
0.0 In
Mon 27
May
00:00

ENE
ENE

6 / 12 mph 43 / 39°F 88% 1026 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
06:00

WNW
WNW

5 / 11 mph 52 / 50°F 96% 1021 mb
Low level cloud: 79%
Mid level cloud: 77%
High level cloud: 1%
Most Significant Cloud Type: low
100%
0.2 In
12:00

SE
SE

6 / 12 mph 59 / 58°F 56% 1025 mb
Low level cloud: 0%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: medium
61%
0.0 In
18:00

NNW
NNW

16 / 33 mph 59 / 56°F 70% 1022 mb
Low level cloud: 40%
Mid level cloud: 29%
High level cloud: 6%
Most Significant Cloud Type: low
50%
0.1 In
Tue 28
May
00:00

SE
SE

3 / 7 mph 52 / 52°F 81% 1024 mb
Low level cloud: 18%
Mid level cloud: 46%
High level cloud: 2%
Most Significant Cloud Type: low
34%
0.0 In
06:00

NNW
NNW

6 / 13 mph 46 / 42°F 87% 1027 mb
Low level cloud: 3%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
12:00

S
S

10 / 20 mph 64 / 64°F 65% 1022 mb
Low level cloud: 96%
Mid level cloud: 15%
High level cloud: 6%
Most Significant Cloud Type: low
100%
0.0 In
18:00

ENE
ENE

3 / 5 mph 63 / 63°F 63% 1022 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 30%
Most Significant Cloud Type: medium
18%
0.0 In
Wed 29
May
00:00

S
S

7 / 15 mph 58 / 56°F 92% 1020 mb
Low level cloud: 41%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
69%
0.0 In
06:00

SSW
SSW

4 / 9 mph 49 / 48°F 85% 1023 mb
Low level cloud: 0%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
29%
0.0 In
12:00

S
S

13 / 28 mph 65 / 65°F 81% 1016 mb
Low level cloud: 86%
Mid level cloud: 43%
High level cloud: 77%
Most Significant Cloud Type: low
100%
0.0 In
18:00

S
S

8 / 17 mph 56 / 54°F 83% 1020 mb
Low level cloud: 84%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
99%
0.1 In
Thu 30
May
00:00

S
S

15 / 32 mph 68 / 68°F 97% 1007 mb
Low level cloud: 100%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.2 In
06:00

SSE
SSE

8 / 17 mph 52 / 50°F 95% 1017 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

NW
NW

19 / 39 mph 73 / 76°F 57% 1007 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: medium
4%
0.4 In
18:00

SSE
SSE

10 / 20 mph 63 / 63°F 88% 1011 mb
Low level cloud: 98%
Mid level cloud: 58%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 31
May
00:00

WNW
WNW

10 / 22 mph 58 / 56°F 81% 1011 mb
Low level cloud: 8%
Mid level cloud: 10%
High level cloud: 2%
Most Significant Cloud Type: low
11%
0.0 In
06:00

ENE
ENE

6 / 12 mph 59 / 58°F 99% 1006 mb
Low level cloud: 100%
Mid level cloud: 77%
High level cloud: 18%
Most Significant Cloud Type: low
100%
0.5 In
12:00

NW
NW

17 / 35 mph 70 / 70°F 54% 1014 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
18:00

NNE
NNE

2 / 5 mph 70 / 69°F 79% 1006 mb
Low level cloud: 84%
Mid level cloud: 21%
High level cloud: 77%
Most Significant Cloud Type: low
100%
0.0 In

Other Locations Near to Parkersburg

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