Since ocean surface temperatures are typically higher than land, mP air can be thought of as milder than cP or cA air. If you’ve ever been to the Northeast U.S., you know what this weather is like. If you can make it through the bitter, dry winter, you get heavily rewarded with a wonderfully cool and beautiful summer! Continental tropical air masses produce hot, dry conditions like you see in the Southwest U.S. and Mexico.

Put together, you can have dry, cool air ; moist, cool air ; dry, warm air ; or moist, warm air . Maritime air masses are humid air masses originating from oceans or large bodies of water. Continental air masses are dry air masses originating from ladun blog land. Equatorial air masses are warm moist air masses originating from the equatorial region. Tropical air masses are warm air masses originating from the lower latitudes. Polar air masses are cold air masses originating from the upper latitudes.

Called a dry line this boundary will separate moist air from the Gulf of Mexico and dry desert air from the southwestern states . September 2003, Hurricane Juan was particularly vicious, resulting large-scale destruction. Hurricane Juan tore down power lines, flooded waterfront properties, sank dozens of yachts, heaved sidewalks and damaged stately downtown homes in Halifax and Charlottetown. At its peak, Juan left more than 300,000 homes without power in Nova Scotia and Prince Edward Island.

Warm, humid air from the Gulf of Mexico meets with the warm, dry air from the desert plateau. During the afternoon, convective clouds and even thunderstorms can develop in drylines as moist air rises over the denser dry air. Air masses do not remain over their source regions permanently. Slight changes in weather patterns may shift the air mass to a new location. First, as the air shifts over the different surface characteristics, the air mass begins changing.

To alter the weather conditions over the areas they traverse, air masses come from some of the hottest, coldest, driest, and wettest places on earth. Meteorologists call these air mass birthplaces “source regions.” You can actually tell where an air mass is from by examining its name. Meteorologists classify air masses by one of four “source regions” or locations of origin. These regions are usually large and flat with consistent formations, such as oceans or deserts. Air masses are not stationary, and their movement affects weather.

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