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Severe storms threaten Southern states
AccuWeather
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11/20/2023
Extreme meteorologist Dr. Reed Timmer has an update on the possible thunderstorms and tornadoes across several states as moisture moves in.
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00:00
Strong southerly winds continue to transport moisture rapidly northward
00:03
across central and northern Louisiana. The moisture is just beginning to
00:07
increase here in the Ruston, Louisiana area near the I-20 corridor,
00:11
but big-time moisture is evident in the surface map just to the south of
00:15
Shreveport with a dew point of 66 degrees Fahrenheit,
00:18
which is very big-time low-level moisture for this time of year in the
00:22
late fall, and that's setting the stage for a
00:24
potential outbreak of severe weather across far eastern Texas,
00:27
central and northern Louisiana, pushing into central and southern Mississippi
00:30
late night tonight, possibly even southeastern Louisiana, including the New
00:34
Orleans area as well, but you can start to see some
00:37
high clouds from developing storms to the south and to the southwest of
00:40
the Shreveport area. So far these are not supercell storms,
00:44
but basically just blobs of heavy rain producing storms,
00:47
definitely forming in response to that rapid moisture transport with these
00:50
southerly winds, but as we go through the day,
00:53
surface heating is going to continue. The temperatures here in Ruston are up
00:56
into the 70s, the moisture is going to continue to
00:58
increase, and so if these storms mature into supercells
01:02
and move into this environment just as that low-level jet
01:05
begins to increase, that's the channel of southerly winds just above the ground
01:09
that causes these supercell storms to tighten into tornadoes that could even
01:13
be potentially strong to violent later on this late afternoon and
01:17
evening and especially overnight tonight. That's because that low-level jet is
01:20
forecast to increase to over 50 knots, so it's very important here across the
01:25
target area to stay tuned to those severe weather
01:27
watches and warnings. This is the most dangerous type of outbreak, the ones that
01:31
happen in the middle of the night with those fast-moving storms, and
01:34
information saves lives. If you don't know about those tornado-producing
01:37
storms, you can't enact your family's severe weather safety plan,
01:41
so certainly stay tuned to those watches and warnings through the night tonight
01:45
here across the western mid-south.
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