Sea-Level Pressure (inches of Mercury)

The Sea-Level Pressure map displays the current pressure, reduced to sea level, in inches of mercury. The pressure data are reduced to sea level because surface pressure is directly proportional to elevation. Locations at higher elevation (e.g., western Oklahoma) will always have a lower surface pressure than locations at lower elevations (e.g., eastern Oklahoma). By reducing all of the pressure readings to what they would be at sea level, it is possible to identify high and low pressure systems that move across the state. This map is updated every five minutes.

3-hour Sea-Level Pressure Change (inches of Mercury)

The 3-hour Sea-Level Pressure Change map displays the change in pressure at each Mesonet site (in inches of mercury) over the past three hours. This map is updated every five minutes.

Sea-Level Pressure (millibars)

The Sea Level Pressure map displays the current pressure, reduced to sea level, in millibars. The pressure data are reduced to sea level because surface pressure is directly proportional to elevation. Locations at higher elevation (e.g., western Oklahoma) will always have a lower surface pressure than locations at lower elevations (e.g., eastern Oklahoma). By reducing all of the pressure readings to what they would be at sea level, it is possible to identify high and low pressure systems that move across the state. This map is updated every five minutes.

3-hour Sea-Level Pressure Change (millibars)

The 3-hour Sea-Level Pressure Change map displays the change in pressure at each Mesonet site (in millibars) over the past three hours. This map is updated every five minutes.

National Altimeter Setting

This map is updated every hour using data from NOAA's National Weather Service.