Weather Science
Meteorology fundamentals — from cold fronts to Doppler radar. The science behind weather predictions and snow day forecasts.
Cold Front
The aggressive boundary where a colder air mass forces a warmer air mass upward. Cold fronts move quickly, produce sharp temperature drops, and often trigger thunderstorms or snow squalls along the leading edge.
Curing (Concrete & Paint)
The chemical reaction by which concrete and paint reach full strength. Both processes are temperature-sensitive: pouring concrete or applying paint when overnight temperatures drop below freezing can permanently weaken the result.
Doppler Radar
A radar system that detects precipitation and measures its movement using the Doppler effect. It powers nearly all live storm tracking, including the radar used in modern snow day predictions.
El Niño
A periodic warming of the central and eastern Pacific Ocean that disrupts global weather patterns, often producing wetter winters in the southern United States and milder winters in the north.
Hydration Reaction (Concrete)
The chemical reaction between water and cement that gives concrete its strength. The reaction is heavily temperature-dependent and can lose up to 50% of final strength if interrupted by freezing.
Isobars
Lines on a weather map connecting points of equal atmospheric pressure. Tightly-packed isobars indicate strong winds and rapidly-changing weather.
Jet Stream
A narrow band of fast-moving air high in the atmosphere that steers weather systems across continents. Dips in the jet stream pull frigid Arctic air south, producing North America's most severe winter outbreaks.
La Niña
A cooling of the central and eastern Pacific Ocean — the opposite phase of El Niño. La Niña often produces colder, snowier winters in the northern United States and drier conditions in the south.
Occluded Front
A weather front formed when a fast-moving cold front overtakes a slower warm front. Occluded fronts typically produce extended periods of precipitation as the system winds down.
Radar (Weather)
An electronic system that bounces radio waves off precipitation to map storm location, intensity, and motion. Modern Doppler radar is the foundation of nearly all real-time storm tracking.
Warm Front
The gradual boundary where a warmer air mass slides over a cooler one. Warm fronts produce extended periods of light rain or snow rather than the sharp storms typical of cold fronts.
Wind Shear
A change in wind speed or direction over a short distance. Strong wind shear in the atmosphere is a key ingredient in severe thunderstorms and tornado formation.