Extreme Meteorologist Reed Timmer was in Hammond, Louisiana, as rain drenched the region and severe storms rolled through.
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00:00 We have supercells that are initiating across southeastern Louisiana already.
00:04 A couple severe thunderstorm warnings and they're producing very heavy rain
00:07 and there is a moderate risk for excessive rainfall today, maybe even
00:11 greater than that as we go through the day today. Six, eight inches of rainfall
00:15 possible where those thunderstorms train over the same areas. So certainly flash
00:20 flooding potential is going to be ramping up as we go through the day, but
00:22 the tornado threat is also going to be increasing as we go through the day here
00:26 across southeastern Louisiana. There's a very strong low-level jet in place and
00:31 that's creating strong low-level wind shear that'll cause any sustained
00:34 supercell storms to tighten up in the low levels and produce tornadoes. Some
00:38 conditionally strong too. If tornadoes do happen they will have the potential of
00:43 causing a lot of problems and you can hear that lightning back, hear that
00:46 thunder back behind me, a lot of lightning from these storms as they're
00:49 intensifying and I'm watching for a rain-free base on this storm to see if
00:54 there's already rotation in it and you can already start to see some cloud
00:57 structure as these supercell storms are developing and approaching the Hammond
01:01 area and I expect them to gradually intensify as we go through the day as
01:04 instability begins to increase and then these storms are going to congeal together
01:08 with that embedded tornado potential within the line continuing through the
01:12 overnight hours, but then the threat's really going to shift for dangerous flash
01:16 flooding and there are already a bunch of flash flood warnings up in the
01:19 Jackson area a little bit further north where those storms have trained over the
01:22 same areas on the stable side of the outflow boundary.