squall line, with the feature placed at the leading edge where the significant wind shifts and pressure rises. Sea and land breeze fronts Sea breeze fronts occur on sunny days when the landmass warms the air above it to a temperature above the water temperature. Similar boundaries form downwind on lakes and rivers during the day, as well as offshore landmasses at night. Since the specific heat of water is so high, there is little diurnal temperature change in bodies of water, even on the sunniest days. The water temperature varies less than . By contrast, the land, with a lower specific heat, can vary several degrees in a matter of hours. See also Bowditch's American Practical Navigator Extratropical cyclone Frontolysis Outline of meteorology Ridge (meteorology) References External links "The Mid-Latitude Cyclone" Norwegian Cyclone Model — NWS Unified Surface Analysis Manual — NWS Unified Surface Analysis — NWS Glossary of Meteorology Cold Front Page Synoptic meteorology and weather Weather prediction