Hey Ray: Relative humidity and rain
Why is it that when it's raining, the relative humidity isn't 100%?
Hey Ray | The Dark Side of the Moon
The Moon is spherical like Earth, so why do we only see one side of it? Meteorologist Ray Petelin has the answer.
KDKA-TV morning weather blog: March 29, 2026
Sunday begins a run of warmer temperatures throughout the week, but the rain is coming along with it.
Hey Ray: Is it windier in Pittsburgh than usual?
Heavy winds have been in the headlines lately, so has it been windier lately than it used to be in Pittsburgh?
KDKA-TV morning weather blog: March 28, 2026
While Saturday will be a sunny day, temperatures will be only in the mid-40s.
Tornado watch for Pittsburgh area expires as severe weather moves out
A tornado watch issued for most of the Pittsburgh area on Thursday night has expired.
Hey Ray: Lighting fluorescent bulbs
Fluorescent bulbs can be lit up without a light fixture, but it takes caution.
Hey Ray: Inertia and Apples
The science of motion can often surprise you - and an inertia experiment could have the opposite results from what you think!
Weird icicles | Hey Ray
We see icicles hanging down from awnings and roofs, but have you ever seen them form sideways?
Hey Ray: Staying safe when it's icy outside
The temptation to walk or play on ice during the winter is high, but staying safe is more important. Here's how you can check if it's safe.
Hey Ray: Why is snow white?
Whenever we get a big snowfall, people ask, "Why is snow white?" The answer, as always, is science!
Historic snowstorm hits Pittsburgh area, with snow to continue all day
Pittsburgh could see up to 16 inches of snow throughout the day on Sunday.
Timeline shows when snow is forecast to start and end in Pittsburgh area
The winter storm barreling toward Pittsburgh is forecasted to drop at least 8 inches on most areas over 36 hours.
Latest forecast ahead of winter storm
Along with expecting several inches of snow, Pittsburgh will also have cold temperatures.
Hey Ray: Naming the arctic and Antarctic
People, things, and places are named for many different reasons, but how did the Arctic and the Antarctic get their names?