I am in Baltimore MD and I am picking up Tulsa Oklahoma and central Arkansas FM radio stations?

Question

Amazing ! I know there is a scientific reason for this what is it called ? I was picking up 94.1 the http://www.point941.com/pointweb/#
http://www.ktso.com/contact.shtml

Answer 1

Tropospheric ducting and enhancement or refraction via inversion layer
Sudden changes in the atmosphere's vertical moisture content and temprature profiles can on random occasions make microwave and UHF & VHF signals propagate hundreds of kilometers up to about 2,000 kilometers (1,300 mi)—and for ducting mode even farther—beyond the normal radio-horizon. The inversion layer is mostly observed over high pressure regions, but there are several tropospheric weather conditions which create these randomly occurring propagation modes. Inversion layer's altitude for non-ducting is typically found between 100 meters (300 ft) to about 1 kilometer (3,000 ft) and for ducting about 500 meters (1,600 ft) to 3 kilometers (2 mi), and the duration of the events are typically from several hours up to several days. Higher frequencies experience the most dramatic increase of signal strengths, while on low-VHF and HF the effect is negligible. Propagation path attenuation may be below free-space loss. Some of the lesser inversion types related to warm ground and cooler air moisture content occur regularly at certain times of the year and time of day.

Answer 2

Normally u don't get bounce on those signals but it happens some time. I was in the Ecuador jungle at the head waters for the Amazon . I workers on a large communications system so I had some good equipment and built a pre amp to go with a large TV antenna . We were trying to get something from Quito about 150 miles small chance . Got it all installed and turned it on and realized that the antenna was pointed north. So I started through the channels and on ch 4 they were playing the national anthem . How did we get the states?? well we didn't it was Panama and it was good color the hole thing for about 4 hours and it went away and never came back . There was a storm that was north of them and acted like a large reflector.