[Ncep.hmon] Harvey secondary eyewall

[Jili Dong - NOAA Affiliate]

Just curious if radial wind from any ground-based radar goes into the model?

Several coastal radars have coverage for the storm since last night
(espically KBRO and KPRC). It could provide good cross-beam wind coverage
to analyze the change of storm wind structure during secondary eyewall
formation, either for assimilation or verification.


Jili



On Aug 25, 2017, at 11:20 AM, Bin Liu - NOAA Affiliate <bin.liu at noaa.gov>
wrote:

Yes, I was also looking at this. Very impressive, and HWRF has several
cycles predicted similar double eyewall structures.

https://radar.weather.gov/radar.php?product=N0Z&rid=BRO&loop=yes

Bin

---
Bin Liu
NOAA/NWS/NCEP/EMC
5830 University Research CT
Cubicle 2026
College Park, MD 20740
Tel: (301)-683-3763 <(301)%20683-3763>
Email: Bin.Liu at noaa.gov



On Fri, Aug 25, 2017 at 11:17 AM, Sergio Abarca <sergio.abarca at noaa.gov>
wrote:

> All,
> It looks like* Harvy has indeed a concentric eyewall -with a very narrow
> moat-*. See attached the radar image of the Brownsville radar.
>
> I list below 5 days worth of cycles that included a forecasting time valid
> at 082506. HWRF forecasted a concentric eyewalls (as diagnosed by a
> secondary wind maxima in the azimuthal average of wind, considering a prior
> radial expansion of the tangential wind field) at least in 50% of these
> cycles and 75% of the cycles that have Harvey initialized in the Gulf of
> Mexico. Those cycles initialized outside of it, including the Caribbean had
> a harder time forecasting it.
> Sergio
>
> All Harvey cycles with a forecasting hour valid at 082506. Tose with
> secondary eyewall or hints of it are *highlighted in bold face listing
> the time when the secondary eyewall was most apparent*:
> 082506
> 082500
> *082418 at f15 (very narrow moat)*
> *082412 at f24*
> *082406 has hints of it*
> *082400 at f24*
> *082318 at f18*
> *082312 at f42*
> 082306-can’t display
> *082300 at f48*
> 082218
> 082212
> *082206 - h54*
> 082200
> *082118 at f72*
> 082112
> 082106
> *082018 at f102*
> 082012
> 082006
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.lstsrv.ncep.noaa.gov/pipermail/ncep.hmon/attachments/20170825/cb1e6271/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: KCRP.png
Type: image/png
Size: 376127 bytes
Desc: not available
Url : https://www.lstsrv.ncep.noaa.gov/pipermail/ncep.hmon/attachments/20170825/cb1e6271/attachment-0002.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: KBRO.png
Type: image/png
Size: 194571 bytes
Desc: not available
Url : https://www.lstsrv.ncep.noaa.gov/pipermail/ncep.hmon/attachments/20170825/cb1e6271/attachment-0003.png