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Cat 5 Lee | peak 165 mph 926 mb | post-tropical


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41 minutes ago, MaineJay said:

Interesting in that all three take Lee due north once it's heading in that direction. 

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GYX says, "easy children".

Quote
LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Overall pattern at 500 MB across NOAM and vicinity continue to
look more like summer than autumn, as main zonal part of the jet
stays well N of the intl border, with cool air hard to find,
even when troughs do develop. The coolest 850 MB temps only drop
to around 10 C, which is fairly close to normal, and this
doesn`t last very long according to models. Sfc flow will affect
temps somewhat, but other than a cool rainy day /of which there
could be one or two/, temps should generally be on the warn
side of normal. Also, let’s not get too excited about Day 9-10
models runs and tropical systems at this point

 

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9 hours ago, StretchCT said:

Nobody is discussing Margot yet.  Trending closer to Lee.  GFS trend for next Thursday.

image.thumb.gif.a53abf418de7711a22768e1780884c0c.gif

Yea the m storm plays a huge role as thought. Thinking outer banks brush and cape cod brush right now. Could very well make landfall though.

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17 hours ago, so_whats_happening said:

Yea long ways to go on this one where exactly the westward motion stops will be key this will be highly dependent on how the ridging is modeled in the Atlantic. I also believe the system behind lee, whatever the M name is, will also plays a factor in how things set up. It could enhance ridging which means weaker trough in NE and further west ATL ridge or it could significantly weaken the ridge and allow a nice gradual recurve.

Either way im loving the hurricane activity off the coast to help cool these waters give us another 2 before season ends and I may be a happy camper.

My thoughts still the same. If you look at where franklin went i say just west of there is this systems path. This is why the 'N' storm forecasted after this could be the big risk factor. As always still pretty far out but models always tend to not grasp the atlantic ridging pattern right. They do it in summer and winter. 

First lets see how quickly it can get to major hurricane status. Next is how much north or south it goes around 20N 60W.

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  • The title was changed to Lee | 80 mph 989 mb | Very High Ceiling potential for the MDR
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Interesting that ADT doesn't put the center in the "eye", but the progression to the ring of convection is impressive. 

image.png.be9bc1117af9dd9991c000c1f76aa0a4.png

As with Jova, ADT will have constraints kicking in so as to not over portray the intensification. It's possible in looking at this again that ADT was picking up a surface eye a few frames back and the rest of the column was just off to its east.  But it does appear to be going boom

goes16_dvorak-ir_13L_202309071135.thumb.gif.03e756f7422d34fc139d77fa8140d680.gif

 

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I posted in Idalia's thread an analysis which was done concerning model performance and the HAFS-B got good reviews.

The two H's I added are upper highs.  The flow around them is optimal for Lee - the northern one provides a western flow complimenting the circulation, the western H provides northerly flow complementing the circulation. 

image.thumb.png.b22f2f692154c4462ea1c6aa39980224.pngAFS-B

 

The concern is that the two combine to not only enhance the circulation (at 500mb) but also to steer Lee further west.  

hafsb-p_z500_vort_13L_fh117-126.thumb.gif.d7c5a728ac1ea8ff7fa96fdd7a9b2704.gif

Maybe these 4 frames moving due west are temporary, it's the end of the run so I can't tell.  But I don't want any due west movement with this storm ever, unless it's to avoid Bermuda. 

 

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As stated above, RI is occuring, and will likely continue today. The
question doesn't appear to be if RI continues, but rather how
strong Lee will get, and how quickly will it get there. Many of the
models are calling for remarkable rates of intensification, beyond
rates normally seen with model forecasts. Both HAFS models forecast
Lee to exceed 150 kt within the next 2 days, and even HCCA brings
the hurricane above the category 5 threshold. The NHC intensity
forecast has been shifted significantly higher, but is actually
within the guidance envelope. 
INIT  07/1500Z 16.4N  50.0W   90 KT 105 MPH
 12H  08/0000Z 17.1N  51.7W  115 KT 130 MPH
 24H  08/1200Z 18.2N  54.0W  130 KT 150 MPH
 36H  09/0000Z 19.2N  56.1W  140 KT 160 MPH
 48H  09/1200Z 20.1N  58.1W  140 KT 160 MPH
 60H  10/0000Z 20.9N  59.8W  135 KT 155 MPH

 

https://www.nhc.noaa.gov/text/refresh/MIATCDAT3+shtml/071459.shtml

Edited by StretchCT
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Some trends...

https://www.atmos.albany.edu/facstaff/tang/tcguidance/al132023/

HAFS A latest 6z run has it peak at 160kts, or 185mph. Highest and soonest of the runs.

image.thumb.png.dfab1fd5a98f79663652a7bccfc360e9.png

HAFS B down to 150kts, lower than prior runs, although sooner.

image.thumb.png.376aa17e8f0adaf201564c654db174cf.png

HWRF keeps it a Cat 4, but is the highest yet.

image.thumb.png.9f892c26f07664384863141ba44c4613.png

SHIPS now over Cat 4 and it's highest run

image.thumb.png.a2b221c5332d64fee66fd0cd2f8cd9f0.png

Edited by StretchCT
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  • The title was changed to Lee | 105 mph 983 mb | Very High Ceiling potential for the MDR

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