Weather Word of the Day

June 27, 2019

Hectopascal - The standard measurement for atmospheric pressure now adopted by the World Meteorological Organization for global weather charts. The millibar is still however a commonly used unit for measuring pressure. Conveniently, millibars are actually equal to hectopascals. The global average for sea level pressure is 1013 hectopascals or millibars.

June 26, 2019

Land Breeze - A land breeze is an off shore wind, meaning the wind blows from the land out to sea. It occurs at night when the land becomes sufficiently colder than the air over the water. Land breezes are most likely to occur on clear, calm nights. The opposite of a land breeze is a sea breeze.

June 25, 2019

Microscale - Microscale meteorology is the study of small and/or short-lived atmospheric phenomenon. This study of small-scale weather systems includes tornadoes, rainbows, and thunderstorm updrafts and downdrafts.

June 24, 2019

Refraction - The bending of light as it passes from one medium to another.

June 23, 2019

Mist - A visible collection of tiny water droplets suspended in the atmosphere that can reduce visibility to as low as 5/8 of a mile. It does not reduce visibility as much as fog and is often confused with drizzle. Drizzle falls to the ground, while mist hangs in the lower atmosphere.

June 22, 2019

Cyclolysis - The process that occurs when a cyclone is weakening and decaying. At the end of cyclolysis, the cyclone has become extinct.

June 21, 2019

Tropical Depression - A tropical cyclone with sustained winds lower than 30 knots/35 mph/55kph