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Severe Weather 2026

Before the posts start rolling in, global models are stil not fixed on the trough they've been showing in the Central Plains for a good week or two. Specifically, the 14th. Potential svr threat but ensembles are not very strong on this still. What I will say is though, it is a very good looking synoptic setup for the time of year if trends hold.
 
Before the posts start rolling in, global models are still not fixed on the trough they've been showing in the Central Plains for a good week or two. Specifically, the 14th. Potential svr threat but ensembles are not very strong on this still. What I will say is though, it is a very good looking synoptic setup for the time of year if trends hold.
Funny how right after someone posted there might not be a pattern change, this shows up. Have to assume there'll be various shots at severe weather as various Pacific TCs have their remnants flung eastward.
 
Before the posts start rolling in, global models are stil not fixed on the trough they've been showing in the Central Plains for a good week or two. Specifically, the 14th. Potential svr threat but ensembles are not very strong on this still. What I will say is though, it is a very good looking synoptic setup for the time of year if trends hold.

A couple consecutive GFS runs a day or two ago had a nice, coherent, broad-wavelength, negatively tilted trough ejection for around the 12th-13th, but it then backed off to a less amplified/more piecemeal scenario and the ensemble didn't really support it.

Today's 12Z run looked like a big cut-off "bowling ball," with the LLJ displaced pretty far east of the fairly narrow/marginal instability axis.
 
Before the posts start rolling in, global models are stil not fixed on the trough they've been showing in the Central Plains for a good week or two. Specifically, the 14th. Potential svr threat but ensembles are not very strong on this still. What I will say is though, it is a very good looking synoptic setup for the time of year if trends hold.
one things for sure, its looks like its gonna pull a lot of moisture up into the midwest and the ohio valley. gotta watch this carefully.
 
new day 5 slight

...DISCUSSION...
A surface high will move from the OH Valley into the Northeast on
Fri/D4 as an upper trough lifts out of the region and temporary
upper ridging occurs. A stationary boundary is still forecast to be
along the northern Gulf Coast at this time, and a weak midlevel wave
will begin to form over TX. Meanwhile, a potential tropical cyclone
may develop toward the central Gulf of America.

Low-level winds will begin to veer to a southeasterly direction
along the Gulf Coast late Fri/D4 into Sat/D5, as the potential
tropical cyclone evolves. NHC currently gives a high probability of
this occurring. As such, an influx of rich moisture will develop out
of the south, with a substantial rain shield and embedded
thunderstorms likely along the northern Gulf Coast beginning Fri/D4
night. Initially, surface temperatures over land will remain cool
due to precipitation and initial modification of the surface ridge
air mass.

At this time, it appears Sat/D5 is the most likely time for the more
substantial low-level warming to occur, with tropical yet
sufficiently unstable profiles. Of particular note is how the
developing shortwave trough over TX interacts with the tropical low.
Some models indicate 40-45 kt midlevel winds, which would complement
the strong low-level shear and favor low-topped supercells with
tornado potential. The greatest threat area should be along the
coastal counties given expected poor low-level lapse rates farther
inland. Initial elevated convection may give way to an east-west
zone of supercells as the coastal baroclinic zone moves inland. Some
additional threat into Sun/D6 may exist as well.

For the period Mon/D7 into Tue/D8, models are now developing an
amplified upper trough over the western CONUS. Low-level moistening
will be most prominent later in the period, and could eventually
result in a zone of strong to severe storm potential, however,
predictability is quite low at this time.
 

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new day 5 slight

...DISCUSSION...
A surface high will move from the OH Valley into the Northeast on
Fri/D4 as an upper trough lifts out of the region and temporary
upper ridging occurs. A stationary boundary is still forecast to be
along the northern Gulf Coast at this time, and a weak midlevel wave
will begin to form over TX. Meanwhile, a potential tropical cyclone
may develop toward the central Gulf of America.

Low-level winds will begin to veer to a southeasterly direction
along the Gulf Coast late Fri/D4 into Sat/D5, as the potential
tropical cyclone evolves. NHC currently gives a high probability of
this occurring. As such, an influx of rich moisture will develop out
of the south, with a substantial rain shield and embedded
thunderstorms likely along the northern Gulf Coast beginning Fri/D4
night. Initially, surface temperatures over land will remain cool
due to precipitation and initial modification of the surface ridge
air mass.

At this time, it appears Sat/D5 is the most likely time for the more
substantial low-level warming to occur, with tropical yet
sufficiently unstable profiles. Of particular note is how the
developing shortwave trough over TX interacts with the tropical low.
Some models indicate 40-45 kt midlevel winds, which would complement
the strong low-level shear and favor low-topped supercells with
tornado potential. The greatest threat area should be along the
coastal counties given expected poor low-level lapse rates farther
inland. Initial elevated convection may give way to an east-west
zone of supercells as the coastal baroclinic zone moves inland. Some
additional threat into Sun/D6 may exist as well.

For the period Mon/D7 into Tue/D8, models are now developing an
amplified upper trough over the western CONUS. Low-level moistening
will be most prominent later in the period, and could eventually
result in a zone of strong to severe storm potential, however,
predictability is quite low at this time.
First October tornadoes
 
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