Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Lake Mccloud 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Lake Mccloud

California, United States Of America

Long range weather outlook for Lake Mccloud includes 14 day forecast summary:

Reviewing the forecast for Lake Mccloud Over the next 14 days and the average daytime maximum temperature will be around 21°C, with a high for the two weeks of 28°C expected on the afternoon of Tuesday 17th. The mean minimum temperature will be 5°C, dipping to its lowest on the morning of Sunday 15th at 1°C. Expect the following 14 days ahead to remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 11
Mar		01:00

NNE
NNE

 5 / 10 mph 31 / 27°F 65% 1029 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
04:00

NNE
NNE

 5 / 10 mph 31 / 26°F 66% 1029 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
07:00

NNE
NNE

 5 / 10 mph 34 / 29°F 65% 1031 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 41%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SE
SE

 2 / 3 mph 56 / 56°F 37% 1028 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 6 / 7 mph 63 / 62°F 32% 1027 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 6 / 8 mph 62 / 60°F 39% 1026 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 15%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

 1 / 2 mph 39 / 39°F 70% 1028 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 4%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 2 / 5 mph 37 / 36°F 74% 1029 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: high
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 12
Mar		22:00

N
N

 4 / 8 mph 40 / 37°F 68% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 12%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 13
Mar		01:00

NNE
NNE

 4 / 9 mph 38 / 35°F 68% 1024 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 4 / 9 mph 36 / 33°F 68% 1023 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 24%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 4 / 9 mph 38 / 34°F 63% 1022 mb
Low level cloud: 0%
Mid level cloud: 14%
High level cloud: 33%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

 3 / 3 mph 63 / 62°F 36% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 33%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

 7 / 8 mph 68 / 66°F 28% 1017 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 33%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSW
SSW

 6 / 7 mph 65 / 64°F 35% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 32%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

W
W

 1 / 3 mph 42 / 42°F 70% 1016 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 19%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 2 / 5 mph 42 / 41°F 71% 1017 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 100%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 14
Mar		01:00

N
N

 3 / 6 mph 41 / 40°F 75% 1017 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 100%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 4 / 8 mph 39 / 37°F 77% 1018 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 6%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 3 / 7 mph 40 / 37°F 73% 1019 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WSW
WSW

 2 / 3 mph 56 / 56°F 55% 1018 mb
Low level cloud: 0%
Mid level cloud: 31%
High level cloud: 15%
Most Significant Cloud Type: medium
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

W
W

 3 / 3 mph 63 / 62°F 44% 1017 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 19%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

 5 / 6 mph 64 / 62°F 29% 1017 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
19:00

N
N

 5 / 11 mph 39 / 36°F 56% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

N
N

 5 / 11 mph 36 / 31°F 56% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 29%
Most Significant Cloud Type: high
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 15
Mar		01:00

NNE
NNE

 6 / 13 mph 34 / 29°F 57% 1025 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 1%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 6 / 13 mph 34 / 28°F 53% 1025 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

NNE
NNE

 6 / 13 mph 35 / 29°F 47% 1026 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
10:00

ENE
ENE

 4 / 5 mph 62 / 61°F 23% 1023 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

E
E

 3 / 3 mph 73 / 72°F 23% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 0 / 0 mph 72 / 73°F 30% 1019 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 5 / 10 mph 47 / 45°F 55% 1022 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 60%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 6 / 12 mph 44 / 41°F 58% 1024 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
Mon 16
Mar		01:00

NNE
NNE

 6 / 12 mph 43 / 39°F 61% 1024 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
04:00

NNE
NNE

 6 / 13 mph 42 / 38°F 62% 1024 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
07:00

NNE
NNE

 6 / 12 mph 42 / 37°F 61% 1024 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
10:00

ENE
ENE

 4 / 4 mph 69 / 68°F 29% 1022 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
13:00

ESE
ESE

 4 / 4 mph 78 / 75°F 21% 1020 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
16:00

ESE
ESE

 2 / 2 mph 78 / 75°F 25% 1017 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
19:00

NNE
NNE

 6 / 13 mph 52 / 50°F 53% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: high
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NNE
NNE

 6 / 13 mph 48 / 46°F 57% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: high
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 17
Mar		01:00

NNE
NNE

 6 / 14 mph 48 / 45°F 56% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 32%
Most Significant Cloud Type: high
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

NNE
NNE

 6 / 13 mph 46 / 43°F 59% 1019 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
07:00

NNE
NNE

 6 / 12 mph 47 / 44°F 62% 1019 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
10:00

ESE
ESE

 3 / 3 mph 75 / 75°F 35% 1017 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
13:00

SSW
SSW

 6 / 7 mph 82 / 78°F 25% 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
16:00

SSW
SSW

 6 / 7 mph 79 / 77°F 31% 1014 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
19:00

NNW
NNW

 2 / 4 mph 53 / 53°F 66% 1017 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
22:00

N
N

 4 / 7 mph 51 / 51°F 67% 1018 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
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 18
Mar		04:00

NNE
NNE

 5 / 10 mph 48 / 46°F 58% 1017 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
10:00

S
S

 3 / 4 mph 70 / 70°F 45% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 5%
Most Significant Cloud Type: high
5%
0.0 In
16:00

SSW
SSW

 7 / 8 mph 75 / 76°F 36% 1014 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
22:00

N
N

 3 / 6 mph 49 / 49°F 65% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 17%
Most Significant Cloud Type: high
17%
0.0 In
Thu 19
Mar		04:00

NNE
NNE

 2 / 5 mph 46 / 46°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In
10:00

SSW
SSW

 5 / 6 mph 69 / 69°F 50% 1018 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: medium
3%
0.0 In
16:00

S
S

 8 / 9 mph 70 / 70°F 40% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 18%
Most Significant Cloud Type: medium
3%
0.0 In
22:00

NW
NW

 1 / 2 mph 48 / 48°F 93% 1018 mb
Low level cloud: 14%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
16%
0.0 In
Fri 20
Mar		04:00

SW
SW

 3 / 5 mph 47 / 47°F 93% 1015 mb
Low level cloud: 33%
Mid level cloud: 88%
High level cloud: 14%
Most Significant Cloud Type: low
65%
0.0 In
10:00

SSW
SSW

 6 / 7 mph 64 / 64°F 61% 1016 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 26%
Most Significant Cloud Type: medium
47%
0.0 In
16:00

WSW
WSW

 3 / 4 mph 52 / 51°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 44%
Most Significant Cloud Type: medium
16%
0.0 In
22:00

NNW
NNW

 5 / 9 mph 46 / 43°F 81% 1017 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 99%
Most Significant Cloud Type: medium
14%
0.0 In
Sat 21
Mar		04:00

NNW
NNW

 3 / 6 mph 26 / 23°F 79% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
10:00

NNE
NNE

 4 / 5 mph 47 / 46°F 27% 1022 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
16:00

WNW
WNW

 12 / 15 mph 39 / 32°F 43% 1019 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: medium
27%
0.0 In
22:00

N
N

 5 / 10 mph 27 / 21°F 59% 1024 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Sun 22
Mar		04:00

N
N

 3 / 6 mph 20 / 16°F 73% 1026 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
10:00

E
E

 2 / 2 mph 45 / 45°F 26% 1022 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 7%
Most Significant Cloud Type: high
6%
0.0 In
16:00

NW
NW

 8 / 11 mph 39 / 34°F 35% 1021 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.0 In
22:00

N
N

 5 / 10 mph 28 / 22°F 52% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 17%
Most Significant Cloud Type: medium
2%
0.0 In
Mon 23
Mar		04:00

N
N

 5 / 10 mph 18 / 11°F 71% 1029 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 12%
Most Significant Cloud Type: medium
4%
0.0 In
10:00

ENE
ENE

 3 / 3 mph 49 / 48°F 24% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
0.0 In
16:00

NNE
NNE

 6 / 8 mph 45 / 42°F 28% 1021 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
0.0 In
22:00

N
N

 5 / 11 mph 28 / 22°F 64% 1021 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 4%
Most Significant Cloud Type: medium
6%
0.0 In
Tue 24
Mar		04:00

NNE
NNE

 7 / 14 mph 21 / 12°F 60% 1028 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 52%
Most Significant Cloud Type: high
52%
0.0 In
10:00

SSW
SSW

 4 / 4 mph 55 / 54°F 33% 1018 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
16:00

ESE
ESE

 3 / 4 mph 60 / 60°F 17% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
10%
0.0 In
22:00

NNW
NNW

 2 / 5 mph 33 / 32°F 86% 1020 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 20%
Most Significant Cloud Type: medium
10%
0.0 In
Wed 25
Mar		04:00

NNE
NNE

 4 / 9 mph 27 / 22°F 57% 1027 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 100%
Most Significant Cloud Type: medium
10%
0.0 In
10:00

SSW
SSW

 4 / 4 mph 44 / 42°F 87% 1016 mb
Low level cloud: 24%
Mid level cloud: 65%
High level cloud: 100%
Most Significant Cloud Type: low
59%
0.0 In
16:00

S
S

 3 / 4 mph 57 / 58°F 30% 1019 mb
Low level cloud: 0%
Mid level cloud: 76%
High level cloud: 100%
Most Significant Cloud Type: medium
79%
0.0 In
22:00

SW
SW

 5 / 7 mph 42 / 38°F 98% 1013 mb
Low level cloud: 97%
Mid level cloud: 94%
High level cloud: 4%
Most Significant Cloud Type: low
100%
0.1 In
Thu 26
Mar		04:00

NNE
NNE

 4 / 9 mph 37 / 34°F 55% 1019 mb
Low level cloud: 0%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: medium
100%
0.0 In
10:00

SSW
SSW

 5 / 7 mph 40 / 37°F 99% 1015 mb
Low level cloud: 98%
Mid level cloud: 76%
High level cloud: 48%
Most Significant Cloud Type: low
100%
0.4 In
16:00

SSW
SSW

 6 / 8 mph 61 / 61°F 31% 1012 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 98%
Most Significant Cloud Type: medium
14%
0.0 In
22:00

SW
SW

 4 / 9 mph 34 / 30°F 97% 1014 mb
Low level cloud: 51%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: low
68%
0.1 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