ATL: HANNA - Remnants - Discussion

[Aric Dunn]

Definitely the NE quadrant is the strongest.

021430 2633N 09357W 8427 01536 0040 +184 +182 189049 050 038 006 00
021500 2634N 09359W 8417 01544 0036 +185 +183 194051 052 039 009 00
021530 2635N 09401W 8410 01544 0030 +185 +183 197053 055 040 010 00
021600 2636N 09403W 8403 01545 0023 +187 +182 198058 060 041 011 00
021630 2637N 09405W 8410 01533 0020 +179 //// 191057 061 040 016 01
021700 2639N 09407W 8402 01537 0012 +182 //// 192054 057 046 013 01
021730 2640N 09408W 8403 01528 0010 +181 //// 201054 055 048 017 01
021800 2641N 09410W 8416 01514 0004 +184 //// 203054 056 050 035 01
021830 2642N 09412W 8416 01509 9999 +177 //// 205058 062 045 051 01
021900 2643N 09414W 8385 01547 9997 +186 //// 209052 054 041 024 05
021930 2644N 09416W 8401 01523 9991 +190 //// 214053 054 035 013 01
022000 2645N 09418W 8413 01512 9993 +187 //// 213049 050 035 001 01
022030 2646N 09419W 8426 01493 9989 +189 //// 215048 049 037 003 01
022100 2647N 09421W 8417 01497 9984 +184 //// 218046 050 041 033 01
022130 2648N 09423W 8416 01493 9979 +185 //// 226040 043 042 039 01
022200 2649N 09425W 8420 01486 9973 +188 //// 236036 039 048 028 01
022230 2650N 09426W 8415 01488 9969 +192 //// 235032 033 050 012 05
022300 2651N 09428W 8415 01486 9962 +196 //// 237032 034 034 007 01
022330 2653N 09429W 8422 01476 9962 +194 //// 239030 030 021 002 01
022400 2655N 09430W 8419 01477 9955 +200 +194 236028 029 020 000 00

This is the SE ? lets see what the NW quad is .. since it is on a slight wsw motion.. also hopefully they do a SW to NE pass before they leave.

[USTropics]

The massive size of this storm is making the process a bit longer, but if Hannah is ever able to fully rotate the northwestern eyewall (blue arrow) towards the SW (which looks closer to happening with each frame), significant strengthening can then occur. There has been just bit of dry continental air that was mixed in (pink) due to the massize inflow layer that has slowed this process down:

[NDG]

Definitely the NE quadrant is the strongest.

021430 2633N 09357W 8427 01536 0040 +184 +182 189049 050 038 006 00
021500 2634N 09359W 8417 01544 0036 +185 +183 194051 052 039 009 00
021530 2635N 09401W 8410 01544 0030 +185 +183 197053 055 040 010 00
021600 2636N 09403W 8403 01545 0023 +187 +182 198058 060 041 011 00
021630 2637N 09405W 8410 01533 0020 +179 //// 191057 061 040 016 01
021700 2639N 09407W 8402 01537 0012 +182 //// 192054 057 046 013 01
021730 2640N 09408W 8403 01528 0010 +181 //// 201054 055 048 017 01
021800 2641N 09410W 8416 01514 0004 +184 //// 203054 056 050 035 01
021830 2642N 09412W 8416 01509 9999 +177 //// 205058 062 045 051 01
021900 2643N 09414W 8385 01547 9997 +186 //// 209052 054 041 024 05
021930 2644N 09416W 8401 01523 9991 +190 //// 214053 054 035 013 01
022000 2645N 09418W 8413 01512 9993 +187 //// 213049 050 035 001 01
022030 2646N 09419W 8426 01493 9989 +189 //// 215048 049 037 003 01
022100 2647N 09421W 8417 01497 9984 +184 //// 218046 050 041 033 01
022130 2648N 09423W 8416 01493 9979 +185 //// 226040 043 042 039 01
022200 2649N 09425W 8420 01486 9973 +188 //// 236036 039 048 028 01
022230 2650N 09426W 8415 01488 9969 +192 //// 235032 033 050 012 05
022300 2651N 09428W 8415 01486 9962 +196 //// 237032 034 034 007 01
022330 2653N 09429W 8422 01476 9962 +194 //// 239030 030 021 002 01
022400 2655N 09430W 8419 01477 9955 +200 +194 236028 029 020 000 00

This is the SE ? lets see what the NW quad is .. since it is on a slight wsw motion.. also hopefully they do a SW to NE pass before they leave.

Hopefully we will see another pass but most likely not after using some of that fuel during its search and rescue.

[Monsoonjr99]

Judging by IR, it looks like Hanna is taking in a gulp of dry air.

[FLpanhandle91]

Judging by IR, it looks like Hanna is taking in a gulp of dry air.

Perhaps a bit, but nothing to hinder development imo. Convection too strong.

[Aric Dunn]

991 mb..

[FLpanhandle91]

991.9 extrapolated pressure this pass.

[shiny-pebble]

Really close to closing off that core

Sent from my SM-G970U using Tapatalk

[Aric Dunn]

Really close to closing off that core

Sent from my SM-G970U using Tapatalk

It is closed on radar..

just takes time to build through the column..

[hipshot]

Definitely the NE quadrant is the strongest.

021430 2633N 09357W 8427 01536 0040 +184 +182 189049 050 038 006 00
021500 2634N 09359W 8417 01544 0036 +185 +183 194051 052 039 009 00
021530 2635N 09401W 8410 01544 0030 +185 +183 197053 055 040 010 00
021600 2636N 09403W 8403 01545 0023 +187 +182 198058 060 041 011 00
021630 2637N 09405W 8410 01533 0020 +179 //// 191057 061 040 016 01
021700 2639N 09407W 8402 01537 0012 +182 //// 192054 057 046 013 01
021730 2640N 09408W 8403 01528 0010 +181 //// 201054 055 048 017 01
021800 2641N 09410W 8416 01514 0004 +184 //// 203054 056 050 035 01
021830 2642N 09412W 8416 01509 9999 +177 //// 205058 062 045 051 01
021900 2643N 09414W 8385 01547 9997 +186 //// 209052 054 041 024 05
021930 2644N 09416W 8401 01523 9991 +190 //// 214053 054 035 013 01
022000 2645N 09418W 8413 01512 9993 +187 //// 213049 050 035 001 01
022030 2646N 09419W 8426 01493 9989 +189 //// 215048 049 037 003 01
022100 2647N 09421W 8417 01497 9984 +184 //// 218046 050 041 033 01
022130 2648N 09423W 8416 01493 9979 +185 //// 226040 043 042 039 01
022200 2649N 09425W 8420 01486 9973 +188 //// 236036 039 048 028 01
022230 2650N 09426W 8415 01488 9969 +192 //// 235032 033 050 012 05
022300 2651N 09428W 8415 01486 9962 +196 //// 237032 034 034 007 01
022330 2653N 09429W 8422 01476 9962 +194 //// 239030 030 021 002 01
022400 2655N 09430W 8419 01477 9955 +200 +194 236028 029 020 000 00

This is the SE ? lets see what the NW quad is .. since it is on a slight wsw motion.. also hopefully they do a SW to NE pass before they leave.

Hopefully we will see another pass but most likely not after using some of that fuel during its search and rescue.

Where did they take off from?

[BobHarlem]

Probably 60mph/992mb at 11PM based on those 2 vortex messages.

[floridasun78]

Probably 60mph/992mb at 11PM based on those 2 vortex messages.

yes 60mph
at 11pm

[catskillfire51]

Such a lopsided storm. I’m in the northern suburbs of Houston and I haven’t seen a drop. And to the east, storms all the way to Florida. I could really use some rain.

I am 45 min south of Houston and I have had off and on showers since yesterday with passing bands for a total of 3.24"

[GCANE]

I step away for a few hours and this thing explodes.
Knew it would happen.
The high CAPE pool its tracking into is a keg of dynamite, not to mention the ideal UL conditions.
What is really nailing this is the convection that fired along the coast a few hours ago.
Check this sounding from Corpus Christi at 12Z.
All the dry air got flushed out.

[caneseddy]

65 mph winds/992 mb West at 8mph

Getting there..

[Aric Dunn]

65 mph for 11pm advisory.

[NDG]

This is the SE ? lets see what the NW quad is .. since it is on a slight wsw motion.. also hopefully they do a SW to NE pass before they leave.

Hopefully we will see another pass but most likely not after using some of that fuel during its search and rescue.

Where did they take off from?

Lakeland FL

[HurricaneFrances04]

75 mph is the peak in the forecast, but note this in the discussion:

The peak intensity could be higher than what is
shown in the intensity forecast below since landfall is expected
to occur between the 12 and 24 h forecast times.

[NDG]

NW quadrant is just about as strong as the NE quadrant.

NOAA3 0508A HANNA HDOB 32 20200725
023430 2727N 09459W 8426 01475 9964 +191 //// 071066 068 047 005 01
023500 2729N 09500W 8411 01496 9972 +189 //// 076065 067 046 004 01
023530 2731N 09502W 8415 01499 9980 +191 +190 077064 067 048 003 00
023600 2732N 09503W 8432 01486 9988 +188 //// 079067 070 043 001 01
023630 2734N 09505W 8414 01510 9990 +194 +182 079064 066 044 001 00
023700 2735N 09506W 8420 01506 9994 +192 +187 079065 066 043 000 00

[aspen]

Using my Instantaneous Cyclone Energy formula and the 11pm updated intensity, Hanna is at 9.52 units, making it the strongest system of the 2020 Atlantic season by this metric. It will absolutely beat our Arthur’s minimum pressure of 991 mbar before landfall in 15-18 hours.