Is sea breeze front a cold front?

Sea breeze front is not a cold front. Sea breeze front is a mesoscale front of the boundary layer, which has the characteristics of density current. Its formation is related to the dynamic and thermal effects of local topography, which is an important cause of mesoscale convective weather and one of the difficulties in local weather forecast.

The front formed when the wind meets the hot air layer on the land in the process of advancing from the sea surface to the land.

Characteristics of sea breeze front

Sea breeze front appears most frequently in Leng Hai and warm land in spring and summer, because spring and summer are the seasons with the strongest sea breeze effect. Sea breeze front is most likely to appear in the afternoon and tends to dissipate at night.

After the formation of sea breeze front, it usually pushes inland, with uneven speed, generally slow first and then fast, and gradually moves smoothly, with an average speed of about 35 meters per second, and the final migration distance can exceed 100 km from the coast. The initial frontal speed is about half of the sea breeze intensity, and the later wind speed is similar to the frontal speed.

In the area where sea breeze front passes, the temperature decreases and the dew point increases, which can reach the difference of 10℃ in a short time. Before and after the ferry crossing, the wind direction changed to 180. Cloud systems often appear near sea breeze front.

When the front moves slower than the sea breeze, the ocean air rises on the front of the sea breeze, and if it reaches the condensation height, a clear cloud line can be formed. When the front invades inland, the land air is forced to rise, and the coastal front can form dense cumulus lines.