Tornadoes and strong storms caused major damage across the Chicago
area,
including at least one death now being reported in Indiana.
Good morning. Thanks for joining us.
I'm Dan Ponce. And I'm Lauren Jacques.
Let's go right over to Morgan Cole Mar for the
latest honor forecast morning.
Hey, so many tornado warnings.
Paul Conrad's back there counting him up,
he's got up to 13 issued Yesterday we had observed
tornado warnings and then the regular old tornado warning.
And there is a difference.
The regular one is saying,
hey, there's radar indicated rotation and that means a tornado
could occur.
The observed tornado warnings, which is all of these locations.
Is basically saying, hey, we either have somebody that's seen
it or we can see tornadic debris signature on our
radar.
So Sugar Grove, Oswego, Manhattan,
Joliet, Midway Airport, Crown Point and O'Hare all had observed
tornado warnings by the National Weather Service.
There's two ways they do that.
There's two ways they confirm a tornado in real time
during an event like that.
The first one is the obvious 1A spotter observe it
observes it,
whether it's law enforcement or Emergency Management or a train
spotter,
they see it visually on the ground and they relay
it.
The other one is something called correlation coefficient,
fancy word for. Detector, it's a product of our dual
pole radar and it basically can tell you where there's
meteorological stuff in the atmosphere versus something that is not
meteorological or debris. So I took these two screenshots last
night and this is for the sugar growth to North
Aurora,
all of this reddish pink that's all atmospheric material you
can kind of see it's real small,
but north of Sugar Grove,
this little circle here of a bright blue and then
a few minutes later you see it move toward North
Aurora.
You can still see a little bit of blue in
there that's saying hey.
Something up in the atmosphere aloft that's not weather related,
like there's debris up being lofted into the atmosphere.
And that's the other way the National Weather Service will
confirm a tornado in real time without actually getting eyes
on it.
They're headed out for several days to survey tons of
locations.
They've got a list of 20 plus spots that they're
going to start looking at here starting today.