Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Ishikari 14 Day Long Range Forecast

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

Japan

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

The next 14 day outlook for Ishikari shows the average daytime maximum temperature will be around 14°C, with a high for the two weeks of 18°C expected on the afternoon of Thursday 2nd. The mean minimum temperature will be 7°C, dipping to its lowest on the morning of Wednesday 1st at 5°C. The next 14 days will have mixed overhead conditions with some days dry and some seeing a significant amount of rain. The current forecast indicates Wednesday 8th 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 01
May		21:00

NNW
NNW

 3 / 4 mph 50 / 50°F 69% 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
Thu 02
May		00:00

SE
SE

 2 / 4 mph 48 / 48°F 67% 1016 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
03:00

SE
SE

 6 / 10 mph 43 / 40°F 71% 1017 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
06:00

SE
SE

 7 / 12 mph 44 / 39°F 73% 1017 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

SE
SE

 7 / 8 mph 57 / 54°F 53% 1017 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
12:00

ESE
ESE

 5 / 6 mph 63 / 61°F 45% 1016 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
15:00

NNW
NNW

 2 / 2 mph 64 / 61°F 49% 1015 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 6 / 8 mph 57 / 53°F 65% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 31%
Most Significant Cloud Type: high
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 7 / 9 mph 50 / 47°F 74% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 87%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 03
May		00:00

SE
SE

 10 / 18 mph 46 / 41°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 69%
High level cloud: 9%
Most Significant Cloud Type: medium
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 6 / 10 mph 45 / 42°F 67% 1014 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 37%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

E
E

 7 / 12 mph 47 / 43°F 70% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 32%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

 11 / 13 mph 59 / 56°F 57% 1012 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 4%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

WNW
WNW

 17 / 20 mph 61 / 60°F 55% 1012 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 18%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 13 / 15 mph 60 / 56°F 55% 1011 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 8 / 11 mph 57 / 54°F 66% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 16%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNW
NNW

 7 / 11 mph 51 / 49°F 78% 1014 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 04
May		00:00

N
N

 6 / 11 mph 47 / 44°F 88% 1016 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 40%
Most Significant Cloud Type: high
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NNW
NNW

 4 / 7 mph 46 / 44°F 92% 1016 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 3 / 4 mph 49 / 48°F 83% 1018 mb
Low level cloud: 1%
Mid level cloud: 15%
High level cloud: 16%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NW
NW

 7 / 8 mph 54 / 51°F 64% 1018 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 96%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 10 / 12 mph 55 / 51°F 59% 1018 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 22%
Most Significant Cloud Type: medium
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NW
NW

 11 / 13 mph 53 / 50°F 59% 1018 mb
Low level cloud: 0%
Mid level cloud: 94%
High level cloud: 21%
Most Significant Cloud Type: medium
95%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

 8 / 9 mph 52 / 48°F 71% 1020 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
21:00

W
W

 2 / 3 mph 49 / 49°F 74% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 32%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 05
May		00:00

ESE
ESE

 11 / 17 mph 45 / 39°F 84% 1021 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 15 / 26 mph 43 / 36°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 60%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 15 / 22 mph 46 / 39°F 82% 1021 mb
Low level cloud: 2%
Mid level cloud: 4%
High level cloud: 85%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 16 / 19 mph 56 / 51°F 71% 1020 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
12:00

SE
SE

 16 / 18 mph 62 / 61°F 64% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 20%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

 15 / 17 mph 62 / 60°F 65% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 48%
Most Significant Cloud Type: high
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

 14 / 17 mph 55 / 50°F 81% 1019 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 100%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

 11 / 19 mph 49 / 45°F 87% 1020 mb
Low level cloud: 2%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 06
May		00:00

SE
SE

 8 / 15 mph 48 / 44°F 87% 1020 mb
Low level cloud: 1%
Mid level cloud: 51%
High level cloud: 100%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

 6 / 11 mph 47 / 44°F 88% 1019 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 89%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 2 / 3 mph 52 / 51°F 83% 1020 mb
Low level cloud: 0%
Mid level cloud: 59%
High level cloud: 100%
Most Significant Cloud Type: medium
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNW
NNW

 2 / 2 mph 59 / 57°F 75% 1020 mb
Low level cloud: 0%
Mid level cloud: 71%
High level cloud: 61%
Most Significant Cloud Type: medium
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NW
NW

 10 / 11 mph 57 / 54°F 81% 1020 mb
Low level cloud: 4%
Mid level cloud: 81%
High level cloud: 100%
Most Significant Cloud Type: medium
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

 11 / 13 mph 52 / 48°F 84% 1020 mb
Low level cloud: 18%
Mid level cloud: 66%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

W
W

 7 / 10 mph 50 / 46°F 85% 1021 mb
Low level cloud: 12%
Mid level cloud: 47%
High level cloud: 100%
Most Significant Cloud Type: medium
84%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 9 / 13 mph 49 / 45°F 88% 1021 mb
Low level cloud: 22%
Mid level cloud: 50%
High level cloud: 100%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 07
May		00:00

ESE
ESE

 14 / 23 mph 47 / 41°F 87% 1021 mb
Low level cloud: 16%
Mid level cloud: 85%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

 11 / 20 mph 45 / 39°F 87% 1021 mb
Low level cloud: 14%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

 13 / 23 mph 44 / 37°F 86% 1021 mb
Low level cloud: 46%
Mid level cloud: 100%
High level cloud: 99%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

 13 / 16 mph 47 / 41°F 92% 1021 mb
Low level cloud: 47%
Mid level cloud: 86%
High level cloud: 74%
Most Significant Cloud Type: low
86%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
12:00

ESE
ESE

 13 / 15 mph 51 / 46°F 84% 1019 mb
Low level cloud: 45%
Mid level cloud: 82%
High level cloud: 54%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

 11 / 13 mph 53 / 48°F 82% 1019 mb
Low level cloud: 44%
Mid level cloud: 80%
High level cloud: 100%
Most Significant Cloud Type: low
83%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

 9 / 11 mph 51 / 47°F 89% 1018 mb
Low level cloud: 85%
Mid level cloud: 91%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

 9 / 11 mph 48 / 44°F 89% 1018 mb
Low level cloud: 59%
Mid level cloud: 98%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 08
May		03:00

NW
NW

 0 / 1 mph 47 / 47°F 91% 1008 mb
Low level cloud: 62%
Mid level cloud: 76%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
09:00

E
E

 10 / 13 mph 55 / 52°F 65% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
10%
0.0 In
15:00

S
S

 2 / 2 mph 65 / 65°F 83% 1011 mb
Low level cloud: 41%
Mid level cloud: 84%
High level cloud: 22%
Most Significant Cloud Type: low
73%
0.0 In
21:00

NW
NW

 1 / 1 mph 54 / 54°F 70% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 09
May		03:00

N
N

 7 / 9 mph 44 / 40°F 88% 1006 mb
Low level cloud: 96%
Mid level cloud: 88%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
09:00

NNE
NNE

 2 / 2 mph 64 / 64°F 65% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
15:00

NW
NW

 9 / 10 mph 59 / 59°F 79% 1008 mb
Low level cloud: 84%
Mid level cloud: 84%
High level cloud: 65%
Most Significant Cloud Type: low
100%
0.0 In
21:00

SE
SE

 5 / 6 mph 53 / 51°F 85% 1005 mb
Low level cloud: 0%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
43%
0.0 In
Fri 10
May		03:00

NNW
NNW

 5 / 8 mph 48 / 46°F 91% 1008 mb
Low level cloud: 67%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
72%
0.0 In
09:00

NW
NW

 10 / 12 mph 54 / 51°F 80% 1007 mb
Low level cloud: 76%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
80%
0.0 In
15:00

NNW
NNW

 16 / 18 mph 56 / 52°F 78% 1008 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 0%
Most Significant Cloud Type: medium
17%
0.0 In
21:00

WNW
WNW

 7 / 8 mph 51 / 48°F 90% 1012 mb
Low level cloud: 24%
Mid level cloud: 3%
High level cloud: 1%
Most Significant Cloud Type: low
24%
0.0 In
Sat 11
May		03:00

SE
SE

 3 / 3 mph 54 / 54°F 86% 1013 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
09:00

SE
SE

 6 / 7 mph 61 / 61°F 72% 1015 mb
Low level cloud: 5%
Mid level cloud: 4%
High level cloud: 4%
Most Significant Cloud Type: low
7%
0.0 In
15:00

ESE
ESE

 9 / 10 mph 70 / 70°F 55% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 1%
Most Significant Cloud Type: medium
4%
0.0 In
21:00

SE
SE

 15 / 26 mph 51 / 46°F 81% 1015 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 12%
Most Significant Cloud Type: medium
7%
0.0 In
Sun 12
May		03:00

SE
SE

 11 / 21 mph 52 / 48°F 85% 1013 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
09:00

SSE
SSE

 21 / 24 mph 63 / 63°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: medium
8%
0.0 In
15:00

NW
NW

 9 / 11 mph 60 / 60°F 80% 1012 mb
Low level cloud: 1%
Mid level cloud: 96%
High level cloud: 40%
Most Significant Cloud Type: medium
99%
0.0 In
21:00

ENE
ENE

 2 / 2 mph 57 / 56°F 88% 1010 mb
Low level cloud: 10%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
Mon 13
May		03:00

SE
SE

 1 / 1 mph 53 / 53°F 91% 1013 mb
Low level cloud: 48%
Mid level cloud: 34%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
09:00

SE
SE

 4 / 4 mph 58 / 58°F 85% 1008 mb
Low level cloud: 31%
Mid level cloud: 93%
High level cloud: 72%
Most Significant Cloud Type: medium
100%
0.0 In
15:00

NW
NW

 11 / 13 mph 60 / 60°F 75% 1014 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
21:00

W
W

 13 / 20 mph 47 / 42°F 82% 1006 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.2 In
Tue 14
May		03:00

WNW
WNW

 4 / 7 mph 54 / 53°F 67% 1015 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.0 In
09:00

WNW
WNW

 15 / 23 mph 57 / 54°F 64% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
15:00

ESE
ESE

 9 / 10 mph 69 / 69°F 56% 1012 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
0.0 In
21:00

N
N

 5 / 8 mph 56 / 55°F 72% 1012 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 5%
Most Significant Cloud Type: medium
13%
0.0 In
Wed 15
May		03:00

ESE
ESE

 14 / 25 mph 48 / 43°F 85% 1010 mb
Low level cloud: 0%
Mid level cloud: 79%
High level cloud: 56%
Most Significant Cloud Type: medium
81%
0.0 In
09:00

SE
SE

 13 / 20 mph 63 / 63°F 52% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
15:00

SSW
SSW

 4 / 5 mph 57 / 56°F 91% 1006 mb
Low level cloud: 90%
Mid level cloud: 67%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.6 In
21:00

SE
SE

 12 / 23 mph 55 / 51°F 81% 1010 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Thu 16
May		03:00

SE
SE

 12 / 23 mph 45 / 39°F 94% 1006 mb
Low level cloud: 32%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
09:00

SE
SE

 12 / 18 mph 63 / 63°F 67% 1013 mb
Low level cloud: 0%
Mid level cloud: 39%
High level cloud: 15%
Most Significant Cloud Type: medium
39%
0.0 In
15:00

SW
SW

 3 / 6 mph 67 / 67°F 72% 1002 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 9%
Most Significant Cloud Type: medium
44%
0.2 In
21:00

SE
SE

 14 / 28 mph 53 / 49°F 80% 1015 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 77%
Most Significant Cloud Type: medium
13%
0.0 In

Other Locations Near to Ishikari

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