I'm Bryan May in the Cal OES newsroom we have excessive heat warnings all across
the state of California but they are especially dangerous in Southern
California this week so joining us to explain why we are headed toward some
very dangerous conditions Kris Mattarochia who is a science and operations
officer with the National Weather Service. Chris first of all thank you
very much for joining us today and sure let's first just discuss what this
forecast is that we're looking for this week. We're looking for several days of
dangerous heat that is not usual for this time of year
even though we're accustomed to the heat this is something that only happens
maybe once or twice a year in Southern California is going to be the center of
that heat specifically around Anaheim. And they're the worst days this week
that we're going forward what are one of the worst days? The worst day is most
likely going to be Wednesday the forecasts will probably change a little
bit but any day can be bad but the worst day of the entire heat wave will be
Wednesday yes. We're in mid to late July now it's always hot in the summer but
what makes this time this week so especially dangerous? That's really a
great question we get that all the time it's hot here all the time but what
makes it dangerous is the low temperatures at night there's not going
to be the relief that we're accustomed to at night, we're going to break records
as far as low temperatures are concerned so this is something unusual that
doesn't happen and also the duration we're looking at a heatwave that could
go all the way through Friday perhaps. You at the National Weather Service have
what's called a heat risk map can you kind of talk about that and maybe even
give us an example of how you're using it and what people need to know about it?
Sure I'd be glad to it's a publicly accessible website so anybody can really
look at it so what it does is it takes a lot of different factors that go into
determining a heatwave or dangerous heat that can put people at risk for heat
related illnesses it puts it all into one place into a picture format that's
easy to read, so as we look at it here very simply purple means a very high
risk [or bad right] the entire population rate
or magenta actually but when you see that that means everybody is at risk.
Red again is bad so you'll see usually an excessive heat warning with a red or
a purple, red is more again there is a risk for the population but especially
those who are heat sensitive the very young, the very old, people on certain
medications or people who aren't acclimated to the heat. So Kris, with
these extreme heat conditions I know that's gonna make our already bad fire
season even worse can you are there any areas that you're especially concerned
about as we go forward? Yes definitely with the particular weather setup in
this scenario we have a red flag warning out for Santa Barbara County now that
means that if any fires do start there's a high risk for them to spread rapidly
and that's mostly due to the winds and as you can see here the wind direction
is coming out of the Northwest so if you look at the elevations here the wind is
going to come over the mountains and then do something what we call downslope
or sink and as that air sinks it accelerates and warms and dries out the
area even further right along the coast here if you compare this to the color
scale you know you're looking at 35-40 mile-per-hour gusts so any fires that do
happen to get started with the heat, with the very dry conditions, with the
overnight temperatures which aren't recovering that much, with the wind gusts
again there's a very high risk for potentially a dangerous situation if a
fire starts for it to spread rapidly, so we'll be watching Santa Barbara County
very closely for the potential for high fire danger with the red flag warning
which is in effect beginning tomorrow and that goes through Thursday and
that's for the sundowner winds as we referred to, usually the winds get most
gusty during the late afternoon evening times and then again during the
early morning times that's when the wind speeds would be the highest. And we've
seen very recently just how dangerous those sundowner winds can be when a fire
pops up. Very true very true, so we want everyone everyone to be reticent and
everyone to be aware the risk that is at hand with this particular event. There
are going to be, look we're still in the summertime kids aren't back in school
yet, there are going to be folks who are headed maybe either down to Anaheim,
Yosemite, where there's smoke still but going hiking, hitting the lakes, what do
people need to know if they're gonna be outside for especially extended periods
of time as we head toward the weekend? Well you definitely want to limit the
amount of time that you're outside, take frequent breaks, meaning going inside to
a cooler building, have a lot of water with you when you are outside
if you do decide to even do that. So just looking right now at Southern
California this is the outline of our excessive heat warning and you can
see there's a lot of magenta a lot of red in that area you know this includes
the big cities in Southern California looking at Los Angeles, San Diego along
the coast usually doesn't get quite as warm so if you're at the beach you're
going to be a little bit cooler but you don't have to go too much further inland
to encounter dangerous eat and again it's the duration and the lack of relief
overnight that's going to put people at risk for heat related illnesses. You
talked about that lack of relief overnight I think in some areas it's not
gonna drop even below what 90 at night right? That is very true, minimum
temperatures in some cases are going to be 15 degrees above normal, again daily
records for warm minimum temperatures look like they're pretty likely to be
broken here and just showing you here really quickly what's some of the
minimum temperatures are here this would be for Wednesday morning you know we're
looking at temperatures still in the middle 70s for some
spots, the later that we go into the week into Thursday again we're looking at
temperatures, Palmdale you can see popping up there at 78
along the coast a little bit cooler but still when we have temperatures in the
middle 70s and near 80 in some spots and that that's pretty dangerous and it's
again, those are usually the times that people will go outside during excessive
heat events where they think that they're going to have relief and
really that's not going to be the case, so again that's what's so different
about this particular heat wave compared to the one we had a few weeks ago where
the focus was mainly on the maximum temperatures during the day where this
is going to be a combination of the maximum temperatures and the minimum
temperatures at night. Kris, I know this kind of heat creates not only problems
for exposure to people but also you talk about very high fire risks this is going
to be a tax on the energy grid across the state, I know you had a conference
call with leaders from across the state earlier today what are you guys working
in coordination on looking at going forward? Well there's other things to be
concerned with too and you hit upon Yosemite, there's an active fire in that
area, anybody that's hiking up there that has any type of respiratory issues,
asthma, you're really gonna have to take it easy and and prepare and take caution,
maybe bring along and inhaler with you if you decide to go up there because the
air quality is going to be bad. Another thing to be concerned with is there is a
risk for thunderstorms across much of the Sierra Nevada pretty much all this
week especially the next couple of days so there is going to be a risk for
lightning strikes and as you know if you're hiking at a very high level, yeah,
you're putting yourself at risk for getting struck by lightning so there's a
lot of lightning safety tips that we can talk about too with regards to that all
right thank you very much Kris Mattarochia with the National Weather Service
and we've got more information about the excessive heat this week on our Cal OES website,
also flex alerts have been issued for Tuesday and Wednesday of this week and
during flex alerts you asked to use your major appliances only
after 9 p.m., turn off any unneeded lights and be sure
and turn your air conditioner up to about 78 if you can take it if at all
possible. You can find out more about these flex alerts by going to flexalert.org and for all of us at Cal OES I'm Bryan May, thanks for watching
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