Метеорологический радар фиксирует не только штормы, но и полеты птиц, летучих мышей и силуэты зданий

Unique features on radar and their discoveries BOWLING GREEN, Ky. (WBKO) - Even on our quiet weather days, radars are still detecting different things—although it may not be rain and storms. Weather radar picks up way more than just rain and thunderstorms. It can actually see some pretty amazing things in our atmosphere. Here are three of the coolest radar discoveries: Purple Martins Take Flight During mid to late summer, Purple Martins take off from their roosts in huge numbers early in the morning. When they do, they show up on radar as interesting loop patterns—like watching thousands of birds all lift off at once. If you look at a radar loop across the entire country on an early summer morning, you can actually see multiple roosts lighting up all at the same time. It’s pretty wild. These birds are large enough and fly in such dense groups that the radar beam bounces off them, creating those distinctive patterns meteorologists have come to recognize and enjoy spotting. Bats and the Invisible Storm Boundary Bats are trickier to spot on radar—they don’t show up quite as clearly as birds. But at night, when bats fly out of caves (especially out West), you can sometimes catch them on the radar display. But here’s something even cooler: you can also see what meteorologists call a gust front. When a strong storm pushes out a blast of cool air, it kicks up tiny particles into the atmosphere. Radar picks those particles up and shows us that cold air boundary moving across the landscape. It’s like watching the storm’s invisible punch line. These gust fronts are important because they can trigger new storms or push existing ones in different directions. Being able to see them on radar helps meteorologists predict storm movement more accurately. Buildings Show Up on Radar Too Radar can actually detect structures like bridges and tall buildings. This usually happens late in the day when something called superrefraction takes over. Here’s what’s happening: The radar beam normally travels in a relatively straight line through the atmosphere. But when conditions are just right, the beam bends downward more than usual. This happens because of changes in temperature, pressure, and moisture in the air. The radar beam bends downward because the air near the ground cools faster than the air above. This is called a temperature inversion. When the beam bends down, it can bounce off buildings, bridges, and other structures on the ground. This creates what meteorologists call ground clutter—extra “noise” on the radar that isn’t actually weather. Why Does the Beam Bend? Three main factors control how much the radar beam bends: Temperature: When temperature decreases rapidly with height, the beam bends upward. But when there’s a temperature inversion (warmer air above, cooler air below), the beam bends downward. This is the main culprit behind ground clutter you see late in the day. Moisture: Water vapor typically decreases with height, which bends the beam downward. If moisture drops off more sharply than normal, you’ll see more downward bending. Less sharp decreases mean less bending. Pressure: Pressure changes affect beam bending too, though it typically doesn’t vary much from day to day. When all these factors combine just right—especially during the nocturnal radiation inversion that happens after sunset—you get superrefraction, and that’s when you see buildings and bridges light up on radar. The Bigger Picture Next time you’re looking at radar, remember it’s not just showing you weather. It’s giving us a window into all kinds of cool stuff happening in our atmosphere. Pretty amazing technology! DOWNLOAD the WBKO First Alert Weather App for the latest on the forecast. Our app is easy to use and free to download! Click one of the following links to download the app: Copyright 2026 WBKO. All rights reserved.