Fast Forecast

WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Little Merthyr 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Little Merthyr

Hereford and Worcester, United Kingdom

Long range weather outlook for Little Merthyr includes 14 day forecast summary:

The outlook for Little Merthyr in the two weeks ahead shows the average daytime maximum temperature will be around 16°C, with a high for the two weeks of 20°C expected on the afternoon of Monday 12th. The mean minimum temperature will be 4°C, dipping to its lowest on the morning of Monday 5th at -1°C. The coming 14 days will remain predominantly dry. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 02
May		18:00

NNE
NNE

 7 / 9 mph 63 / 61°F 79% 1016 mb
Low level cloud: 19%
Mid level cloud: 9%
High level cloud: 10%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 5 / 11 mph 47 / 44°F 78% 1018 mb
Low level cloud: 45%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 03
May		00:00

N
N

 4 / 9 mph 47 / 44°F 71% 1017 mb
Low level cloud: 66%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 4 / 8 mph 44 / 42°F 79% 1016 mb
Low level cloud: 63%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

N
N

 4 / 6 mph 45 / 43°F 83% 1015 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 9 / 11 mph 55 / 51°F 67% 1015 mb
Low level cloud: 1%
Mid level cloud: 4%
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

N
N

 13 / 15 mph 60 / 59°F 66% 1014 mb
Low level cloud: 84%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

N
N

 16 / 18 mph 58 / 53°F 67% 1014 mb
Low level cloud: 39%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

N
N

 10 / 13 mph 56 / 52°F 73% 1015 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
21:00

N
N

 5 / 11 mph 43 / 40°F 90% 1017 mb
Low level cloud: 26%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 04
May		00:00

NNE
NNE

 3 / 6 mph 42 / 40°F 91% 1018 mb
Low level cloud: 54%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

E
E

 3 / 4 mph 45 / 44°F 85% 1019 mb
Low level cloud: 50%
Mid level cloud: 93%
High level cloud: 0%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ENE
ENE

 2 / 3 mph 46 / 45°F 85% 1020 mb
Low level cloud: 40%
Mid level cloud: 61%
High level cloud: 0%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NE
NE

 8 / 9 mph 47 / 42°F 79% 1021 mb
Low level cloud: 95%
Mid level cloud: 27%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

N
N

 8 / 9 mph 53 / 49°F 66% 1021 mb
Low level cloud: 55%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 9 / 11 mph 52 / 49°F 60% 1021 mb
Low level cloud: 17%
Mid level cloud: 99%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 10 / 14 mph 49 / 45°F 69% 1022 mb
Low level cloud: 84%
Mid level cloud: 77%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NE
NE

 7 / 13 mph 42 / 37°F 67% 1023 mb
Low level cloud: 15%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 05
May		00:00

N
N

 6 / 12 mph 35 / 30°F 84% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 2%
Most Significant Cloud Type: medium
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 6 / 12 mph 32 / 26°F 90% 1025 mb
Low level cloud: 3%
Mid level cloud: 1%
High level cloud: 5%
Most Significant Cloud Type: low
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 6 / 10 mph 36 / 30°F 80% 1025 mb
Low level cloud: 16%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 15 / 17 mph 48 / 41°F 64% 1025 mb
Low level cloud: 98%
Mid level cloud: 0%
High level cloud: 9%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 12 / 14 mph 49 / 44°F 64% 1024 mb
Low level cloud: 86%
Mid level cloud: 4%
High level cloud: 32%
Most Significant Cloud Type: low
91%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 10 / 12 mph 51 / 47°F 69% 1024 mb
Low level cloud: 83%
Mid level cloud: 7%
High level cloud: 12%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 8 / 10 mph 51 / 47°F 74% 1024 mb
Low level cloud: 44%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 4 / 9 mph 39 / 36°F 84% 1025 mb
Low level cloud: 14%
Mid level cloud: 4%
High level cloud: 5%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 06
May		00:00

NNW
NNW

 3 / 6 mph 38 / 36°F 88% 1026 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
03:00

WNW
WNW

 3 / 6 mph 35 / 32°F 89% 1025 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 20%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NW
NW

 3 / 6 mph 40 / 38°F 85% 1026 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 100%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 5 / 6 mph 53 / 51°F 67% 1026 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 5%
Most Significant Cloud Type: medium
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 6 / 7 mph 59 / 57°F 60% 1025 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 7 / 8 mph 60 / 60°F 59% 1024 mb
Low level cloud: 90%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
93%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 3 / 3 mph 60 / 59°F 74% 1024 mb
Low level cloud: 45%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 3 / 6 mph 49 / 49°F 77% 1025 mb
Low level cloud: 45%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 07
May		00:00

NNW
NNW

 3 / 7 mph 43 / 42°F 86% 1026 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 10%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

NW
NW

 4 / 7 mph 40 / 38°F 87% 1026 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 7%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNW
NNW

 3 / 6 mph 44 / 42°F 82% 1026 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 14%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

N
N

 5 / 6 mph 57 / 55°F 68% 1025 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 32%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 8 / 9 mph 62 / 60°F 61% 1025 mb
Low level cloud: 10%
Mid level cloud: 2%
High level cloud: 99%
Most Significant Cloud Type: medium
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NNE
NNE

 8 / 9 mph 64 / 62°F 61% 1023 mb
Low level cloud: 72%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NNE
NNE

 4 / 5 mph 62 / 60°F 77% 1023 mb
Low level cloud: 1%
Mid level cloud: 6%
High level cloud: 8%
Most Significant Cloud Type: medium
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

 6 / 12 mph 44 / 41°F 87% 1025 mb
Low level cloud: 10%
Mid level cloud: 25%
High level cloud: 7%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 08
May		00:00

NNW
NNW

 4 / 9 mph 43 / 41°F 83% 1025 mb
Low level cloud: 14%
Mid level cloud: 14%
High level cloud: 15%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

 4 / 8 mph 43 / 41°F 88% 1024 mb
Low level cloud: 91%
Mid level cloud: 24%
High level cloud: 5%
Most Significant Cloud Type: low
99%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

 5 / 7 mph 47 / 43°F 86% 1025 mb
Low level cloud: 19%
Mid level cloud: 11%
High level cloud: 5%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

NNE
NNE

 10 / 11 mph 53 / 49°F 68% 1024 mb
Low level cloud: 40%
Mid level cloud: 8%
High level cloud: 3%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

NNE
NNE

 13 / 15 mph 58 / 55°F 59% 1024 mb
Low level cloud: 81%
Mid level cloud: 3%
High level cloud: 8%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

 15 / 17 mph 58 / 54°F 65% 1023 mb
Low level cloud: 28%
Mid level cloud: 24%
High level cloud: 12%
Most Significant Cloud Type: low
37%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

 13 / 18 mph 54 / 49°F 73% 1024 mb
Low level cloud: 30%
Mid level cloud: 3%
High level cloud: 15%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NNE
NNE

 10 / 18 mph 48 / 44°F 66% 1026 mb
Low level cloud: 72%
Mid level cloud: 4%
High level cloud: 13%
Most Significant Cloud Type: low
74%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 09
May		00:00

WNW
WNW

 4 / 9 mph 41 / 39°F 90% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

N
N

 4 / 6 mph 47 / 46°F 90% 1029 mb
Low level cloud: 33%
Mid level cloud: 14%
High level cloud: 100%
Most Significant Cloud Type: low
49%
0.0 In
12:00

NNE
NNE

 6 / 12 mph 60 / 60°F 61% 1023 mb
Low level cloud: 97%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
18:00

NNE
NNE

 4 / 6 mph 60 / 60°F 69% 1023 mb
Low level cloud: 12%
Mid level cloud: 28%
High level cloud: 94%
Most Significant Cloud Type: low
32%
0.0 In
Sat 10
May		00:00

NNW
NNW

 4 / 8 mph 38 / 35°F 89% 1028 mb
Low level cloud: 6%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
63%
0.0 In
06:00

NNE
NNE

 3 / 5 mph 49 / 49°F 85% 1029 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 6%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

ENE
ENE

 8 / 10 mph 61 / 61°F 60% 1026 mb
Low level cloud: 4%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
4%
0.0 In
18:00

ENE
ENE

 6 / 8 mph 61 / 61°F 79% 1029 mb
Low level cloud: 39%
Mid level cloud: 44%
High level cloud: 19%
Most Significant Cloud Type: low
57%
0.0 In
Sun 11
May		00:00

N
N

 4 / 6 mph 48 / 46°F 88% 1031 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 10%
Most Significant Cloud Type: medium
17%
0.0 In
06:00

N
N

 4 / 5 mph 48 / 47°F 88% 1032 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 21%
Most Significant Cloud Type: medium
10%
0.0 In
12:00

N
N

 5 / 8 mph 64 / 64°F 62% 1031 mb
Low level cloud: 20%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
18:00

NE
NE

 7 / 12 mph 60 / 60°F 73% 1029 mb
Low level cloud: 10%
Mid level cloud: 14%
High level cloud: 4%
Most Significant Cloud Type: low
14%
0.0 In
Mon 12
May		00:00

NNW
NNW

 3 / 6 mph 49 / 48°F 91% 1033 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

N
N

 4 / 6 mph 46 / 44°F 86% 1030 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
12:00

NNE
NNE

 6 / 9 mph 66 / 66°F 61% 1032 mb
Low level cloud: 15%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
18:00

ENE
ENE

 4 / 6 mph 66 / 66°F 73% 1024 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Tue 13
May		00:00

NNW
NNW

 4 / 9 mph 47 / 45°F 74% 1031 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

NNW
NNW

 4 / 7 mph 50 / 48°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
1%
0.0 In
12:00

N
N

 9 / 13 mph 64 / 64°F 58% 1029 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
18:00

NE
NE

 9 / 14 mph 62 / 62°F 80% 1023 mb
Low level cloud: 69%
Mid level cloud: 28%
High level cloud: 96%
Most Significant Cloud Type: low
90%
0.0 In
Wed 14
May		00:00

WNW
WNW

 5 / 10 mph 46 / 44°F 70% 1027 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 21%
Most Significant Cloud Type: medium
45%
0.0 In
06:00

N
N

 4 / 5 mph 49 / 48°F 94% 1026 mb
Low level cloud: 45%
Mid level cloud: 5%
High level cloud: 100%
Most Significant Cloud Type: low
58%
0.0 In
12:00

N
N

 11 / 17 mph 67 / 67°F 67% 1022 mb
Low level cloud: 51%
Mid level cloud: 19%
High level cloud: 14%
Most Significant Cloud Type: low
59%
0.0 In
18:00

NNE
NNE

 10 / 14 mph 60 / 60°F 70% 1022 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
Thu 15
May		00:00

NE
NE

 6 / 9 mph 53 / 52°F 86% 1024 mb
Low level cloud: 59%
Mid level cloud: 88%
High level cloud: 12%
Most Significant Cloud Type: low
91%
0.0 In
06:00

NNW
NNW

 4 / 6 mph 49 / 48°F 85% 1022 mb
Low level cloud: 1%
Mid level cloud: 1%
High level cloud: 13%
Most Significant Cloud Type: high
13%
0.0 In
12:00

NNE
NNE

 10 / 15 mph 59 / 57°F 52% 1024 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 19%
Most Significant Cloud Type: medium
3%
0.0 In
18:00

ENE
ENE

 9 / 13 mph 52 / 48°F 79% 1022 mb
Low level cloud: 84%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: low
92%
0.0 In
Fri 16
May		00:00

N
N

 4 / 9 mph 43 / 41°F 87% 1025 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 21%
Most Significant Cloud Type: medium
7%
0.0 In
06:00

S
S

 1 / 2 mph 50 / 50°F 83% 1022 mb
Low level cloud: 12%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
12:00

NNE
NNE

 9 / 14 mph 59 / 59°F 48% 1023 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 3%
Most Significant Cloud Type: medium
9%
0.0 In
18:00

NNW
NNW

 10 / 15 mph 55 / 52°F 75% 1018 mb
Low level cloud: 51%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
53%
0.0 In
Sat 17
May		00:00

N
N

 3 / 7 mph 45 / 44°F 83% 1023 mb
Low level cloud: 8%
Mid level cloud: 16%
High level cloud: 2%
Most Significant Cloud Type: low
14%
0.0 In
06:00

NW
NW

 9 / 15 mph 43 / 38°F 84% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
3%
0.0 In
12:00

ENE
ENE

 10 / 15 mph 58 / 56°F 66% 1024 mb
Low level cloud: 70%
Mid level cloud: 6%
High level cloud: 1%
Most Significant Cloud Type: low
71%
0.0 In
18:00

N
N

 10 / 16 mph 49 / 45°F 56% 1017 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: medium
7%
0.0 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