Surface Map Features
The map above shows our dew-point temperatures which is an important temp when it comes to weather. The dew-points help us determine how much moisture is in the atmosphere. If we look at the circle placed over Southern Mississippi we can see temps in the Mid 70’s. That is considered to be very saturated and humid type of weather. When you walk outside it feels very uncomfortable. While if we look back in Nevada we see 15, this is more respectful of being very dry air. This type of air also is an indicator that the air is colder over there.
The third feature is the red line going through the Dakota’s and southward through Nebraska and Kansas into Oklahoma and parts of Texas. This is a great defining line to separate the warm moist air from the cooler and drier air. This is the location of our surface cold front also. If we were to forecast the weather ahead of this front we would look for t-storms due to the amount of moisture that is there, while on the west side we would look for sunny skies and drier conditions.
Any time the dew-point temps rise into the 60-70 range it is considered to be very saturated air. While if the temps drop into the 40’s and below we would classify this as drier air. However an important thing to remember is you also need to compare these numbers to the actual air temp to determine how saturated the air is.