>>> OH, WE'RE SO HAPPY TO BE DOING THIS AGAIN. YOU HAVE SOME QUESTIONS AND MARY HAS THE ANSWER. >> YES, SHE DOES AND THIS IS A P POLAR PART OF THE SHOW AND IT MAKES SENSE, MARY. EVERYONE HAS WEATHER QUESTIONS. IF YOU'RE LIKE ME, YOU JUST DON'T KNOW THE ANSWERS. I MEAN REALLY TO SOME BASIC THINGS. >> YEAH. >> AND SO THE TWO QUESTIONS THAT I PICKED TOO, THEY NEED TO DEAL WITH THE WEATHER WE SEE NOW AND THE FIRST STEP, JOSH, HE WANTS TO KNOW WHAT CAUSES HAIL AND EVEN DURING THE SUMMERTIME? >> AND THAT IS USUALLY WHEN WE SEE IT. DO YOU EVER HEAR THEM SAY GRAUPEL? THOSE ARE SOFT PELLETS. SO WHAT HAIL IS, IT'S BASICALLY JUST FROZEN CHUNKS OF RAIN THAT WILL FALL FROM THE SKY. IT ALL HAS TO DO WITH THE UPDRAFTS AND IT ALL HAS TO DO WITH HOW MANY TIMES THAT'S GETTING CARRIED UP IN THE AIR WITH A NICE GRAPHIC ON HOW THEY FORM IF WE WANT TO TAKE THAT. SO REALLY WHEN WE HAVE THE UPDRAFTS, THEY WILL START AS LITTLE TINY ICE BALLS IN THE SKY. IN THE CLOUDS AND THEN THEY GET TOSSED AROUND. >> PING-PONGING? >> YES. >> AND THEY GET TOSSED AROUND BY THE STRONG WINDS. AND BASICALLY THE BIGGER THEY ARE, IT'S HOW MANY TIMES IT'S BEEN TRAVELING UP INTO THOSE STRONGER WINDS. EVENTUALLY THEY WILL GET TOO HEAVY AND THEY FALL DEPENDING ON HOW STRONG IT IS. THAT'S SOMETHING INTERESTING ABOUT THAT AND YOU KNOW HOW WE MEASURE GOLF BALL SIZE HAIL? AND WE MEASURE THE PEA SIZE HAIL? YOU CAN TELL HOW BIG THE HAIL IS GOING TO BE BASED ON HOW STRONG THE UPDRAFT IS. SO IF WE WERE TO CUT THE HAILSTONE IN HALF AND YOU SEE THE RINGS. IF YOU COUNT THEM INSIDE, THAT IS HOW MANY TIMES THAT HAS TRAVELED UP INTO THE ATMOSPHERE AND BACK UP IN THE ATMOSPHERE. >> THAT IS SO CRAZY AS LAST WEEK WE WERE TALKING ABOUT HOW MUCH COLDER THE ATMOSPHERE IS. EVEN ON THE HOT DAY WHEN WE WOULD HAVE A STRONG THUNDERSTORM, YOU COULD STILL SEE THE HAIL. >> DID YOU WATCH THE MOVIE TWISTERS? >> I DID. >> AND WHEN THEY ARE DRIVING IN THAT CAR AND WE'VE GOT GRAPEFRUITS. THAT'S LIKE THE BIGGEST YOU COULD GET, RIGHT? AND THAT IS VERY COMMON WITH A TORNADO BECAUSE YOU WOULD HAVE THOSE STRONG UPDRAFTS. YOU HAVE THE STRONG WINDS AND THE ROTATION. SO YEAH, THAT IS LIKE THE METEOROLOGIST SAYING OH MY GOSH. JUST GRAPEFRUIT SIZE HAIL. >> AND REALLY WHEN YOU DON'T SEE IT OFTEN EITHER. THAT'S REALLY COOL. >> IT'S FINE. >> WE WILL TALK ABOUT DEW POINTS A LOT, WHEN WE WOULD START TALKING ABOUT HOW COMFORTABLE IT IS OUTSIDE AND HOW DOES IT AFFECT US? THIS QUESTION WILL COME FROM DIANE. >> YOU KNOW YOU LOVE THE MUGGY METERS. WHERE IT IS BASICALLY HOW IT'S GOING TO FEEL ON YOUR SKIN AS YOU'RE HEADING OUT. SO IT'S THE TEMPERATURE AND THE DEW POINT AND IT IS HOW MUCH MOISTURE THERE IS IN THAT ATMOSPHERE. WHEN THE TEMPERATURE IS CLOSE TO THE DEW POINT WHEN THEY ARE EXACTLY THE SAME. THEN THEY CANNOT HOLD ANYMORE MOISTURE WHERE THEY HAVE REACHED THEIR POINT OF SATURATION. AND THERE IS A CHART LIKE WE DON'T MAKE UP THESE NUMBERS. WE ARE NOT LIKE HEY. IT IS GOING TO FEEL LIKE THAT. THIS IS ACTUALLY THIS WEEK WHERE IT WILL BE SUPER HUMID IN THE 90sAND THE DEW POINTS INTO THE 70s. WHEN YOU GET TO THE 70s AND THE 60s, IT WILL FEEL STICKY AND MUGGY AND OPPRESSIVE AND HERE IS WHAT'S INTERESTING, SO THERE IS A FEELS LIKE CHART. YES, IT'S A LOT OF NUMBERS WITH THAT CHART. SO IF THE DEW POINT IS 72 AND THE AIR TEMPERATURE IS 88, THEN IT'S GOING TO FEEL LIKE 95. BECAUSE THAT IS WHAT IT IS. THAT IS THE AIR TEMPERATURE. SO THERE IS A RHYME TO THE REASON. SO YOU KNOW BASICALLY THE AIR WILL START TO SWEAT IF YOU THINK ABOUT IT THAT WAY AND SO THE MORE, THE TEMPERATURE AND THE DEW POINT WHEN THEY ARE TOGETHER AND THE MORE HUMID THAT IT WILL FEEL. SO ALSO WHENEVER WE WOULD TALK ABOUT LIKE FOGGY MORNINGS, WHEN WE WOULD TALK ABOUT FOG, FOG IS BASICALLY A LOW CLOUD TO THE GROUND. SO WHEN THE TEMPERATURE AND DEW POINT ARE CLOSE TOGETHER, YOU'RE GOING TO GET FOG. >> SO YOU CAN PREDICT THE FOGGY DAY? >> EASILY BECAUSE OF THE OVERNIGHT HOURS WITH THE LOW OF 70. IT'S HOT AND IT IS STICKY OUTSIDE. THE DEW POINTS ARE IN THE 70s. YOU'RE GOING TO GET SOME PATCHY DENSE FOG. >> I'LL TELL YOU WHAT, IF PEOPLE THINK THIS IS JUST A SILLY THING, LIKE HOW IS THE WEATHER? IT IS REALLY NICE TODAY. BUT WEATHER IMPACTS ALL OF US. IT'S NOT JUST A CONVERSATION STARTER, BUT IT REALLY DOES AFFECT US. IT'S SO INTERESTING. >> WE WILL HAVE TO DIG INTO THE WINDCHILL NEXT. >> IT IS VERY STRAIGHTFORWARD. >> A LOT OF PEOPLE ARE GOING TO BE WONDERING ABOUT THEIR COMMUTE HOMES TODAY, MAYBE SOCCER PRACTICE TODAY. WHAT'S THE ONE WORD TO KEEP IN MIND? >> WE