<s>
A	O
line	B-Algorithm
echo	I-Algorithm
wave	I-Algorithm
pattern	I-Algorithm
(	O
LEWP	O
)	O
is	O
a	O
weather	B-Application
radar	I-Application
formation	O
in	O
which	O
a	O
single	O
line	O
of	O
thunderstorms	O
presenting	O
multiple	O
bow	O
echoes	O
forms	O
south	O
(	O
or	O
equatorward	O
)	O
of	O
a	O
mesoscale	O
low-pressure	O
area	O
with	O
a	O
rotating	O
"	O
head	O
"	O
.	O
</s>
<s>
LEWP	O
often	O
are	O
associated	O
with	O
a	O
multiple-bow	O
serial	O
derecho	O
and	O
often	O
produce	O
tornadoes	B-Language
,	O
some	O
of	O
which	O
can	O
be	O
strong	O
.	O
</s>
<s>
The	O
existence	O
of	O
a	O
LEWP	O
on	O
radar	O
means	O
that	O
a	O
serial	O
derecho	O
has	O
developed	O
or	O
is	O
likely	O
to	O
develop	O
soon	O
,	O
much	O
as	O
a	O
hook	O
echo	O
indicates	O
the	O
same	O
for	O
a	O
tornado	B-Language
.	O
</s>
