Post on 03-Jan-2021
transcript
Wal
lClo
ud: R
otat
ing,
lo
wer
ed, r
ain-
free
base
of
thun
ders
torm
in a
rea
ofst
rong
est u
pdra
ft,un
der
whi
ch a
torn
ado
may
form
.
Shel
fClo
ud: F
orm
sin
a
gust
front
from
asq
uall
line
or
thun
ders
torm
.
Mam
mat
us: S
mal
l pou
ch o
r po
cket
-like
clo
uds
sink
ing
into
drie
r air
and
ofte
n se
enne
ar th
unde
rsto
rms.
Virg
a: P
recip
itatio
n th
at
evap
orat
es b
efor
e re
achi
ng
the
surfa
ce.
Aspe
ritas
: Lon
g w
aves
that
rip
ple
thro
ugh
the
base
of t
he
cloud
nea
r the
dry
/moi
st a
ir bo
unda
ry o
f a th
unde
rsto
rm.
Fog:
A c
loud
on
the
grou
nd
whi
ch li
fts fr
om th
e su
rface
an
d be
com
es S
trat
us o
r di
ssip
ates
with
hea
t fro
m
the
sun.
Other Cloud Phenomena
Cum
ulon
imbu
s: V
ery
tall
sum
mits
with
anv
il-sh
aped
up
per p
art.
Cum
ulus
/Str
atoc
umul
us:
Stra
tocu
mul
us n
ot fr
om
spre
adin
g C
umul
us, w
ith
Cum
ulus
bas
e at
a
diffe
rent
leve
l.
Stra
tus-
or C
umul
us-
frac
tus:
Rag
ged
shre
ds
durin
g pr
ecip
itatio
n, u
sual
ly
seen
bel
ow A
ltost
ratu
s or
Nim
bost
ratu
s.
Stra
tus:
In a
con
tinuo
us
laye
r, or
Str
atus
frac
tus:
In
ragg
ed s
hred
s, o
r bot
h,
with
out p
reci
pita
tion.
Stra
tocu
mul
us: O
ne o
r m
ore
laye
rs, n
ot re
sulti
ng
from
spr
eadi
ng C
umul
us.
Stra
tocu
mul
us: S
prea
d ou
t C
umul
us w
hen
verti
cal
deve
lopm
ent s
tabi
lizes
; so
met
imes
can
occ
ur a
long
w
ith C
umul
us.
Cum
ulon
imbu
s: V
ery
tall
sum
mits
, whi
ch la
ck s
harp
ou
tline
s an
d ar
e no
t an
vil-s
hape
d.
Cum
ulus
: Mod
erat
ely
tall
with
roun
ded
puffy
tops
; m
ay o
ccur
with
Cum
ulus
/ St
rato
cum
ulus
(L4)
.
Cum
ulus
: Thi
n an
d ra
gged
w
ith c
ontin
uous
ly c
hang
ing
edge
s; fo
rms
durin
g fa
ir w
eath
er b
y da
ytim
e he
atin
g.
Alto
stra
tus:
Ful
l or n
early
fu
ll sk
y co
ver t
hat i
s gr
ay,
shap
eles
s an
d tra
nslu
cent
; pr
oduc
es n
o ha
lo.
Alto
stra
tus:
Thi
ck o
paqu
e co
vera
ge, n
o pr
ecip
itatio
n,
or N
imbo
stra
tus:
dur
ing
prec
ipita
tion
or v
irga.
Alto
cum
ulus
: Tra
nslu
cent
ba
nds
or p
atch
es in
a
rela
tivel
y co
ntin
uous
laye
r.
Alto
cum
ulus
Len
ticul
aris
: Le
ns o
r alm
ond
shap
ed,
ofte
n fo
rmed
by
air m
ovin
g ov
er h
ills o
r mou
ntai
ns.
Alto
cum
ulus
: One
or m
ore
laye
rs o
f tra
nslu
cent
or
opaq
ue b
ands
.
Alto
cum
ulus
: A re
sult
of th
e sp
read
ing
tops
of C
umul
us
or s
ides
of C
umul
onim
bus.
Alto
cum
ulus
: In
one
or
mor
e op
aque
laye
rs,
som
etim
es w
ith A
ltost
ratu
s or
Nim
bost
ratu
s.
Alto
cum
ulus
: Sm
all t
ower
s,
whi
ch c
an b
e si
mila
r to
smal
l Cum
ulus
with
wis
py
trails
of v
irga.
Alto
cum
ulus
: Cha
otic
sky
w
ith m
ultip
le la
yers
and
ki
nds
of A
ltocu
mul
us a
t se
vera
l alti
tude
s.
Cirr
us: S
traig
ht, n
early
st
raig
ht, o
r cur
ved
filam
ents
, st
rand
s or
hoo
ks.
Cirr
us: D
ense
whi
te p
uffs
w
ith w
ispy
edg
es.
Cirr
us: D
ense
, anv
il-sh
aped
re
mai
ns, w
hich
wer
e or
igin
ally
the
uppe
r par
ts o
f C
umul
onim
bus.
Cirr
ostr
atus
with
or w
ithou
t C
irrus
: Inc
reas
ing
dens
ity
and
cove
rage
, but
cov
erag
e do
es n
ot re
ach
mid
way
ab
ove
the
horiz
on.
Cirr
ostr
atus
: Vei
l cov
erin
g th
e w
hole
sky
, som
etim
es a
ha
lo a
roun
d th
e su
n or
m
oon
is p
rese
nt.
Cirr
us: F
ilam
ents
, stra
nds
or h
ooks
, inc
reas
ing
in
cove
rage
and
gen
eral
ly
thic
keni
ng a
s a
who
le.
Cirr
ostr
atus
: Vei
l not
co
verin
g th
e w
hole
sky
nor
in
crea
sing
in c
over
age.
Cirr
ocum
ulus
: Thi
n w
hite
rip
ples
or s
mal
l puf
fs, w
hich
m
ay b
e ac
com
pani
ed b
y so
me
Cirr
us/C
irros
trat
us.
Cirr
ostr
atus
with
or w
ithou
t C
irrus
: Inc
reas
ing
dens
ity
and
cove
ring
muc
h of
, but
no
t the
ent
ire s
ky.
Alto
stra
tus
Nim
bost
ratu
sAl
tocu
mul
us
Cirr
ostr
atus
Cirr
ocum
ulus
Cirr
us
Cum
ulus
Cum
ulus
/ St
rato
cum
ulus
Stra
tus
Stra
tocu
mul
usCu
mul
onim
bus
Cum
ulon
imbu
s
Hig
h1H
igh1
H2
H2
H3
H3
H4
H4
H5
H5
H6
H6
H7
H7
H8
H8
H9
H9
Mid
1M
id1
M2
M2
M3
M3
M4
M4
M5
M5
M6
M6
M7
M7
M8
M8
M9
M9
Low
1Lo
w1
L2L2L3L3
L4L4L5L5
L6L6L7L7
L8L8L9L9
NO
AA
Clo
udw
iseA
ltocu
mul
usm
ulu
uulul
mmumto
cumum
Alt
uA
ltu
lmm
Alto
A
Alto
strs
Cirr
us
Stra
tus
Stra
tus
Cirr
ocum
ulus
Cirr
ocum
ulus
Cirr
ostr
atus
Cirr
ostr
atus
Cirr
usC
irrus
Stra
tocu
mul
usSt
rato
cum
ulus
Alto
stra
tus
Alto
stra
tus
Nim
bost
ratu
sN
imbo
stra
tus
Cum
ulus
C
umul
us
Cum
ulon
imbu
sC
umul
onim
bus
Low Clouds Low CloudsMiddle Clouds Middle CloudsHigh Clouds High Clouds
Ther
e ar
e te
n ba
sic
clou
d ty
pes
arra
nged
in th
ree
divi
sion
s ba
sed
on th
e al
titud
e at
whi
ch th
ey fo
rm. L
ow
leve
l clo
uds
are
Cum
ulus
, Cum
ulon
imbu
s, S
tratu
s, a
nd S
trato
cum
ulus
. Mid
dle
leve
l clo
uds
are
Alto
cum
ulus
, Al
tost
ratu
s an
d N
imbo
stra
tus.
Hig
h le
vel c
loud
s ar
e C
irrus
, C
irroc
umul
us a
nd C
irros
tratu
s. P
reci
pita
tion
prim
arily
occ
urs
from
Cum
ulus
, Cum
ulon
imbu
s an
d N
imbo
stra
tus.
Thes
e te
n cl
ouds
are
furth
er d
ivid
ed in
to 2
7 cl
assi
ficat
ions
. Man
y of
thes
e cl
assi
ficat
ions
repr
esen
t the
sam
e ba
sic
clou
d ty
pe (o
r com
bina
tions
of c
loud
s) b
ut in
var
ious
sta
ges
of d
evel
opm
ent,
opac
ity, o
r sky
cov
er.
Lear
n m
ore
abou
t clo
uds
at w
ww
.wea
ther
.gov
/jets
tream
ww
w.n
oaa.
gov/
educ
atio
n
ww
w.w
eath
er.g
ov
6,50
0 ft.
20,0
00 ft
.
Sky
Cle
ar0%
Few
1 - 2
5%Sc
atte
red
26 -
50%
Brok
en51
- 99
%O
verc
ast
100%
Sky
cove
rTh
e pe
rcen
t of s
ky c
over
ed b
y cl
ouds
. Clo
uds
near
the
horiz
on a
ppea
r to
be lo
wer
, m
ore
num
erou
s an
d cl
oser
toge
ther
.
C M Y CM MY
CY CMY
K
clou
dcha
rt_f
ront
_082
619.
ai
1 8
/29/
2019
10
:56:
04 A
Mcl
oudc
hart
_fro
nt_0
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9.ai
1
8/2
9/20
19
10:5
6:04
AM