Severe WX Invest 92L/Hurricane Isaias Severe WX

[Clancy]

FFC still bullish on all tropical hazards, including tornadoes in North and Central Georgia as of this afternoon.

.SHORT TERM...
(This afternoon through Sunday morning)
Issued at 157 PM EDT Fri Oct 9 2026

Hurricane Isaias Impacts on North and Central GA:
Overcast and pleasant conditions before Hurricane Isaias begins to
impact all of North and Central Georgia this evening, with
widespread and potentially significant impacts lasting through
Saturday night. Hurricane Isaias will make landfall over the Gulf
Coast tonight and then weaken as it moves northward across
Mississippi and Alabama into the TN Valley through Sunday. North
and Central Georgia will be on the northeast/east quadrant of the
storm with a prolonged period of strong winds, heavy rainfall with
localized flash flooding, and potential for several tornadoes.

Strong Winds:
As Isaias moves inland tonight and into Saturday, its wind field
will expand considerably, with strong winds extending well east of
the center of the storm into West-Central GA. A Tropical Storm
Warning is in effect for this area where wind gusts to 50 mph will
be possible. Further north/east, while Isaias will be weakening
and becoming post-tropical, there will be a very strong pressure
gradient between it and high pressure over the Mid-Atlantic. This
gradient will support a prolonged period of strong easterly winds
with frequent gusts of 40-50 mph across most of North Georgia
through Saturday night. A High Wind Warning has been issued for
this area, and a Wind Advisory covers areas south and east of the
warnings where gusts to 40 mph are possible. Across all areas, the
prolonged and strong winds could lead to power outages from
downed limbs and trees, especially when combined with saturated
soils from periods of heavy rain.

Heavy Rainfall:
As Isaias moves northward, it will bring widespread rainfall and
multiple bands of heavy rain across the area tonight through
Sunday. Rainfall totals of 1 to 4 inches are likely across much of
the area, with a localized swath of amounts up to 8 inches where
the heaviest bands set up. High rainfall rates (PWAT values of
2-2.3") and repeated rounds of heavy rain could lead to localized
flash flooding, particularly in urban and poor-drainge areas, as
well as flood- prone creeks and streams. A Flood Watch remains in
effect for the entire area.

Tornadoes:
As Isaias tracks northward and inland tonight into Saturday, a
favorable environment for tornadoes will develop across North and
Central Georgia, continuing into Saturday night. Several tornadoes
will be possible during this period, including the overnight
hours. Tornadoes from tropical systems are typically quick to
develop and short-lived, but with the forward speed of the system
and the unique setup, we can`t rule out a stronger (EF2 or EF3),
long-track tornado. It is imperative that everyone has a way to
receive tornado warnings.

&&

 

[Kds86z]

FFC still bullish on all tropical hazards, including tornadoes in North and Central Georgia as of this afternoon.

How is FFC on their stuff?

 

[Clancy]

How is FFC on their stuff?

They're usually pretty conservative when it comes to their wording on threats. I do think they might be talking up the threat simply because it's been a while since Georgia has had much of any dangerous weather. Not sure just how much of the tornado threat will actually be realized, definitely not sure of any stronger tornado potential, but spinups are definitely possible, and it's best not to underestimate TCs in that department. Some of the modelling suggests southeastern GA into the Carolinas might be the place to watch, but it's often a huge coinflip how that region performs.

 

[WeathermanLeprechaun]

The thing is that the more I am looking at model data, I am looking drastically less convinced of a long duration inland tor event here and even more skeptical of anything significant. Time for a "debunking hype" writeup instead.

I'm beginning to see that social media is being a bit too influenced by Milton comparisons when in reality, it's not a good comparison. Look at how pinched this warm sector is after it makes landfall via the GFS (I know but there see other models suggesting this general warm sector size too.)

View attachment 55166
If you want a good prolific inland event, you need a larger warm sector and plus, look how detached the low is. Half of your outer bands will be interacting with lesser moisture and weaker theta-E. Profiles are marginally favorable for transient supercells in this area, but not a higher end, long lived tropical tor event. I'm beginning to look less and less convinced at a genuinely notable tropical tor event here.

I'm liking the Carolinas a LOT more as of now with tornado potential. Favorable large warm sector and it's unknown atm how strong the remnant jet response will actually be as to low level shear in this vicinity but instability will be there with this one.

And I've got a big time analog to this to convince the majority of you about this too. Hurricane Nate. In October 2017, this thing is extremely similar. It dropped 8 tornadoes in Alabama, but none above EF-2 intensity, whereas the remnants decayed in the Carolinas and yet dropped two EF2s. My concerns about the Carolinas here are the potential for stuff to grow rather upscale along the low's outer bands as a result of this front also sagging through. Nate is extremely similar in nature, and i personally believe that this type of scenario will likely verify. Nate had a lack of destabilising but strong shear still pulled EF0-EF1 tornadoes out and when the system had access to dry air + 3CAPE and strong shear, a brief sigtor risk verified in a area not looked at. There's my thoughts on this one.


View attachment 55167


View attachment 55168

I might be tapping the sign a bit early but I think this one is playing out just right.. The Carolinas seems to be having good odds to outperform this risk. Sloppy cells can't sustain themselves ahead of extremely lackluster CAPE and as a result, bleh.