Hurricane Tropical Depression Nine and Major Hurricane Humberto

[Blountwolf]

Some more thoughts - last night before I turned in I noticed a big blowup of convection on the south side of Cuba I thought was interesting.

The amount and intensity of the convection south of Cuba is surprising me.
View attachment 46769

Digging deeper into that, I think what was happening (and to some extent still is) is that dry air was being wrapped around Cuba by Imelda (09L), then mixing with moist Caribbean air causing convection, then land creates some orographic lift and it dumps over the mountains as it gets pulled back north. A Jamaican mixing bowl, if you will. Cool science to nerd out to.



That dry air being entrained may very well be what limits Imelda's intensification moving north, assuming she ever decides to leave the Bahamas.

 

[Atlantic]

We have Tropical Storm Imelda after flight-level winds of 46 kts were measured by recon

000 WTNT34 KNHC 281749 TCPAT4 BULLETIN Tropical Storm Imelda Intermediate Advisory Number 8A NWS National Hurricane Center Miami FL AL092025 200 PM EDT Sun Sep 28 2025 ...DEPRESSION BECOMES TROPICAL STORM IMELDA... ...TROPICAL STORM CONDITIONS EXPECTED OVER THE CENTRAL AND NORTHWESTERN BAHAMAS THIS AFTERNOON AND EVENING... SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...23.9N 77.3W ABOUT 95 MI...155 KM WNW OF THE CENTRAL BAHAMAS ABOUT 370 MI...600 KM SE OF CAPE CANAVERAL FLORIDA MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H PRESENT MOVEMENT...N OR 355 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES

 

[Blountwolf]

Humberto has the trochoidal wobbles.

 

[Blountwolf]

Looking at the output from the HRRR and NAMNST simulated reflectivity, it's neat to see the feeder bands from Imelda get "bent" towards and then taken by Humberto as they begin to interact. Will be something to watch for that will signal the interaction is ongoing and a turn is imminent.

 

[Blountwolf]

TS Imelda near Nassau, 9/28/2025

 

[Lake Martin EF4]

Just checking in to say that I think this may be the first time on record that a Category Five was overshadowed by a TD (or TS as the case may now be). Lol

 

[Blountwolf]

Just checking in to say that I think this may be the first time on record that a Category Five was overshadowed by a TD (or TS as the case may now be). Lol

I mean yeah, but it's sort of like watching to see how big the mouse grows before it's fed to the snake.

IJS.

 

[Kds86z]

 

[Kds86z]

 

[Blountwolf]

Humberto's EWRC moat.

 

[Kds86z]