Turn North of the warm front South of the warm front Warm ...mia. Prepare for and be aware of...
Transcript of Turn North of the warm front South of the warm front Warm ...mia. Prepare for and be aware of...
Nat
iona
l Oce
anic
and
Atm
osph
eric
Adm
inis
tratio
nN
OAA
- ht
tps:
//ww
w.no
aa.g
ovN
OAA
Edu
catio
n Po
rtal -
http
s://w
ww.
noaa
.gov
/edu
catio
n
Nat
iona
l Wea
ther
Ser
vice
NW
S Ed
ucat
ion
- http
s://w
ww.
wea
ther
.gov
/ow
lieJe
tStre
am -
An O
nlin
e Sc
hool
for W
eath
er -
http
s://w
ww.
wea
ther
.gov
/jets
tream
NO
AA
Wea
ther
wis
e
War
m fr
ont
War
mer
air
repl
acin
g co
ol (o
r col
d) a
ir
Col
d fro
ntC
old
(or c
oole
r)ai
r rep
laci
ng
war
mer
air
Dry
line
Boun
dary
div
idin
gdr
y de
sert
air
from
moi
st
gulf
air
HHi
gh p
ress
ure
Loca
tion
of
high
est s
urfa
ceai
r pre
ssur
e
Stat
iona
ry fr
ont
Non
-mov
ing
boun
dary
divi
ding
war
m
air f
rom
coo
ler a
ir
Surfa
ce w
ind
Jet
stre
am
LLo
w p
ress
ure
Loca
tion
of
low
est s
urfa
ce
air p
ress
ure
idin
gai
r
HHi
ghpr
essu
reLo
catio
n of
hi
ghes
tsur
face
Surfa
ce w
ind
Jet
LLo
wpr
essu
reLo
catio
n of
lo
wes
tsur
face
HH
LHHHH
LLLLLHH
L
Jet s
tre
am
Equa
tor
Pola
r jet
str
eam Su
btro
pica
l je
t str
eam
Trop
ical
air
Tem
pera
teai
r
Pola
r air
Stro
ng w
inds
from
the
high
-pre
ssur
e sy
stem
car
ry c
olde
r, dr
ier a
ir in
to th
e da
rk b
lue
area
. As
the
cold
fron
t pa
sses
, pre
cipi
tatio
n en
ds a
nd s
kies
cle
ar fa
irly
rapi
dly.
Poss
ible
impa
cts
The
diffe
renc
e in
air
pres
sure
bet
wee
n tw
o po
ints
det
erm
ines
win
d sp
eed
and
dire
ctio
n. L
arge
pre
ssur
e di
ffere
nces
cau
se v
ery
stro
ng w
inds
. The
y ar
e m
ore
likel
y to
occ
ur in
win
ter a
nd c
an le
ad to
bliz
zard
con
ditio
ns
and
dang
erou
s w
ind
chills
. In
mou
ntai
nous
are
as, l
ight
ning
from
thun
ders
torm
s w
ith li
ttle
or n
o ra
infa
ll ca
n ig
nite
wild
fires
. The
se fi
res
may
spr
ead
rapi
dly
whe
n dr
iven
by
stro
ng w
inds
ass
ocia
ted
with
the
thun
ders
torm
.
Wea
ther
saf
ety
Rem
embe
r: Ic
e an
d Sn
ow, T
ake
It Sl
ow! b
oth
on a
nd o
ff th
e ro
ad. W
hile
driv
ing,
slo
w d
own
to re
duce
the
chan
ce o
f an
acci
dent
on
slip
pery
road
s. D
on’t
over
exer
t you
rsel
f whe
n sh
ovel
ing.
Avo
id p
rolo
nged
exp
osur
e to
col
d te
mpe
ratu
res,
whi
ch c
an c
ause
fros
tbite
and
/or h
ypot
herm
ia. P
repa
re fo
r and
be
awar
e of
pot
entia
l fire
ha
zard
s du
ring
dry
perio
ds.
Nor
th o
f the
col
d fr
ont
In th
e lig
ht b
lue
area
, the
air
tend
s to
be
cool
and
dry
. Clo
ser t
o th
e w
arm
fron
t, m
oist
ure
incr
ease
s. A
s a
resu
lt, c
loud
s th
icke
n,
whi
ch c
an le
ad to
rain
or s
now.
Poss
ible
impa
cts
War
m fr
onts
nea
r are
as o
f low
-pre
ssur
e ca
n br
ing
heav
y ra
in,
snow
, or s
leet
. Rai
n ca
n le
ad to
floo
ding
, whi
le s
now
and
sle
et
may
resu
lt in
a v
arie
ty o
f haz
ards
incl
udin
g sl
ick
road
s an
d po
wer
out
ages
.
Wea
ther
saf
ety
Nev
er d
rive
into
floo
ded
road
way
s or
aro
und
a ba
rrica
de. T
urn
Aro
und
Don
’t D
row
n! K
now
the
risks
of f
lood
s an
d pl
an y
our
evac
uatio
n ro
ute.
Hav
e ex
tra fo
od a
nd w
ater
in c
ase
you
lose
po
wer
or a
re tr
appe
d in
you
r hom
e. D
urin
g w
inte
r wea
ther
, driv
e sl
owly
or n
ot a
t all.
Nor
th o
f the
war
m fr
ont
War
m, m
oist
air
from
the
Gul
f of M
exic
o an
d At
lant
ic O
cean
mov
es in
to th
e gr
een
area
, in
crea
sing
tem
pera
ture
s an
d hu
mid
ity. S
how
ers
and
thun
ders
torm
s ca
n de
velo
p al
ong
and
in
adva
nce
of a
col
d fro
nt o
r dry
line
.
Poss
ible
impa
cts
War
m, m
oist
air
can
be fo
rced
upw
ards
as
it re
ache
s an
app
roac
hing
col
d fro
nt a
nd/o
r dry
line
. Th
is c
an c
ause
sev
ere
thun
ders
torm
s, fl
oodi
ng,
and
torn
adoe
s.
Wea
ther
saf
ety
Alw
ays
be W
eath
er-R
eady
— fo
reca
sts
can
prov
ide
seve
ral d
ays
adva
nce
notic
e of
sto
rms.
C
heck
them
regu
larly
. Be
prep
ared
and
W
hen
Thun
der R
oars
, Go
Indo
ors
to s
tay
safe
fro
m li
ghtn
ing.
Kno
w y
our s
afe
plac
e at
hom
e an
d w
ork.
Sou
th o
f the
war
m fr
ont
Sout
h of
the
fron
ts a
nd
wes
t of t
he d
ry li
neIn
the
oran
ge a
rea,
wea
ther
is g
ener
ally
dry
an
d m
ild. A
ppro
achi
ng fr
onts
can
lead
to h
igh
altit
ude
thun
ders
torm
s ov
er m
ount
ain
peak
s,
resu
lting
in s
trong
win
ds a
t the
sur
face
. Ove
r tim
e th
e ef
fect
s of
the
front
s w
ill di
min
ish.
To le
arn
mor
e ab
out t
he c
hara
cter
istic
s of
fron
ts,
expl
ore
the
rest
of t
he m
ap.
Poss
ible
impa
cts
Stro
ng s
urfa
ce w
inds
can
lead
to d
ust s
torm
s an
d w
ildfir
es. I
n So
uthe
rn C
alifo
rnia
, the
war
m,
dry
Sant
a An
a w
inds
blo
w to
war
ds th
e co
ast
from
the
high
des
ert a
reas
. Sea
sona
l hea
vy
rain
, eve
n fro
m d
ista
nt th
unde
rsto
rms,
can
lead
to
flas
h flo
ods
and
debr
is fl
ows
in ty
pica
lly v
ery
dry
area
s.
Wea
ther
saf
ety
Be a
lert
for d
ust s
torm
s, w
hich
can
com
e w
ith
little
war
ning
— P
ull A
side
, Sta
y A
live.
Pul
l far
of
f the
road
and
turn
all
car l
ight
s of
f. Fo
llow
ev
acua
tion
orde
rs d
urin
g fir
es. M
onito
r fo
reca
sts
for f
lash
floo
ds, w
hich
can
be
a ris
k m
any
mile
s fro
m a
sto
rm, e
spec
ially
in d
ry
valle
ys a
nd c
anyo
ns. D
on’t
be c
augh
t off
guar
d;
be p
repa
red
to m
ove
to h
ighe
r gro
und.
Expl
ore
mor
e w
eath
er p
heno
men
a at
ww
w.w
eath
er.g
ov/je
tstr
eam
Dra
win
g C
oncl
usio
ns •
Toas
ty W
ind
A Pr
essi
ng E
ngag
emen
t • G
oing
with
the
Flow
Sugg
este
d le
sson
s:
he w
eath
er w
e ex
perie
nce
ever
y da
y on
the
grou
nd is
a re
sult
of w
hat i
s ha
ppen
ing
far a
bove
our
hea
ds. U
p th
ere,
the
air i
s al
way
s m
ovin
g as
hea
t ene
rgy
is re
dist
ribut
ed a
cros
s th
e Ea
rth.
Met
eoro
logi
sts
stud
y ai
r mov
emen
t to
mak
e w
eath
er fo
reca
sts.
The
Sun
heat
s th
e Ea
rth, w
hich
then
hea
ts th
e ai
r in
the
atm
osph
ere.
Bec
ause
the
Sun
hits
the
equa
tor
mos
t dire
ctly,
the
air a
t the
equ
ator
rece
ives
mor
e he
at e
nerg
y th
an th
e ai
r clo
ser t
o th
e po
les.
Thi
s w
arm
air r
ises
bec
ause
it is
less
den
se th
an c
ool a
ir.
Whe
n th
e w
arm
air
reac
hes
the
uppe
r atm
osph
ere,
it c
an n
o lo
nger
rise
and
is fo
rced
tow
ard
the
pole
s.
As th
e ai
r coo
ls, i
t bec
omes
den
ser a
nd fa
lls b
ack
tow
ard
Earth
. Hig
h-pr
essu
re a
reas
form
whe
re c
oole
r
air i
s fa
lling
tow
ards
the
Earth
. Low
-pre
ssur
e ar
eas
form
whe
re w
arm
air
is ri
sing
. Air
circ
ulat
es fr
om
area
s of
hig
h pr
essu
re to
are
as o
f low
pre
ssur
e.
The
way
the
air m
oves
affe
cts
the
wea
ther
. Bet
wee
n th
e la
rge
area
s of
circ
ulat
ing
air,
jet s
trea
ms
form
.
Jet s
tream
s ar
e tu
be-li
ke p
aths
of s
trong
win
d m
ovin
g fro
m W
est t
o Ea
st a
roun
d th
e gl
obe.
The
pos
ition
and
stre
ngth
of j
et s
tream
s va
ry fr
om N
orth
to S
outh
, as
wel
l as
verti
cally
thro
ugho
ut th
e at
mos
pher
e.
The
loca
tion
of th
e je
t stre
ams
and
thei
r sea
sona
l mov
emen
t driv
e m
ajor
wea
ther
pat
tern
s ar
ound
the
wor
ld. I
n th
e U
nite
d St
ates
, col
d sn
aps
happ
en w
hen
the
pola
r jet
stre
am d
ips
sout
h. H
eat w
aves
can
occu
r whe
n th
e po
lar j
et s
tream
is v
ery
far n
orth
, allo
win
g fo
r war
m s
ub-tr
opic
al a
ir to
mov
e no
rth.
TBe
wea
ther
wis
e w
here
ver y
ou a
reTh
is m
ap s
how
s a
sim
plifi
ed fo
reca
st fo
r a s
ingl
e, h
ypot
hetic
al d
ay.
The
loca
tions
of t
he lo
w- a
nd h
igh-
pres
sure
sys
tem
s, je
t stre
am,
and
front
s sh
ape
the
wea
ther
that
a g
iven
regi
on m
ay e
xper
ienc
e.
Ther
e ca
n be
haz
ardo
us w
eath
er a
nyw
here
, at a
ny ti
me.
Beg
in
each
day
kno
win
g th
e w
eath
er fo
reca
st. I
f sev
ere
or e
xtre
me
wea
ther
is a
pos
sibi
lity,
per
iodi
cally
che
ck fo
r for
ecas
t upd
ates
. Be
pre
pare
d w
ith a
saf
ety
plan
. Hav
e a
“go-
kit”
with
impo
rtant
pr
oper
ty a
nd d
ocum
ents
read
y in
cas
e of
em
erge
ncy.
Hav
e at
leas
t a
thre
e-da
y su
pply
of f
ood
and
wat
er. L
earn
the
spec
ific
reco
mm
enda
tions
for r
egio
nal a
nd s
easo
nal w
eath
er h
azar
ds.
Lear
n m
ore
abou
t sea
sona
l saf
ety
at
http
s://w
ww.
wea
ther
.gov
/saf
etyc
ampa
ign.
C M Y CM MY
CY CMY
K
clou
dcha
rt_b
ack_
0829
19.a
i 1
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29/2
019
10:
57:1
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Mcl
oudc
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_bac
k_08
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.ai
1
8/29
/201
9 1
0:57
:14
AM