Jump to content
  • Member Statistics

    17,617
    Total Members
    7,904
    Most Online
    Chargers10
    Newest Member
    Chargers10
    Joined

Off we go, Tracking the Friday All In Storm/NADS


stormtracker

Recommended Posts

  • Replies 995
  • Created
  • Last Reply

The 18Z nam is interesting but so are the plume diagrams from the sref. There are reasons to stay conservative on the Thursday night into Friday event. The SREF ensemble members which suggested today's storm had more potential to remain all ice than the CWG gave credit to east of DC. A number of SREF members are saying upcoming event may have ptype issues. You can look at a plume diagram and see all the sref member precipitation at this site http://cms.met.psu.edu/sref/ensembles/Plumes.html. Set it for the 15Z run and DC and you'll get the product. The mean precipitation from all the sref runs is .25. The mean snowfall is 0.08 so there are more rain members than snow members

The 18Z nam is pretty but is one model run.

Link to comment
Share on other sites

The 18Z nam is interesting but so are the plume diagrams from the sref. There are reasons to stay conservative on the Thursday night into Friday event. The SREF ensemble members which suggested today's storm had more potential to remain all ice than the CWG gave credit to east of DC. A number of SREF members are saying upcoming event may have ptype issues. You can look at a plume diagram and see all the sref member precipitation at this site http://cms.met.psu.e...es/Plumes.html. Set it for the 15Z run and DC and you'll get the product. The mean precipitation from all the sref runs is .25. The mean snowfall is 0.08 so there are more rain members than snow members

The 18Z nam is pretty but is one model run.

Thanks Wes! :thumbsup:

Link to comment
Share on other sites

18z NAM soudings... will update as I go along so you may see edits in here...

KEZF -- 0.30 total QPF. At 66 hrs, 2m temp is 34.6 degrees. While 850s-1000 are between 0 and +2... 700mb UVV's are near 15 and everything in the column plunges below -7 (besides 950 mb which heads to -3.2) by hr 72... so I am inclined to believe dynamics overcome the temps for a very wet snow here... but if you are south of here its likely a mix

KMRB -- 0.16 total QPF. Upper 20s for temps. 850s are -5.5, next to zero UVV's.

KFDK -- 0.21 total QPF. Upper 20s for temps. 850s are -3.4, next to zero UVV's.

KIAD -- 0.24 total QPF. Around 30 for temps. 850s are -2.3, UVV's.are 10.5. 900 mb layer is -1... but dynamics should overcome that.

KBWI -- 0.24 total QPF. Around 30 for temps. UVV's are 15.8. 850-900mb are just below zero... but dynamics should overcome that

Link to comment
Share on other sites

18z NAM soudings... will update as I go along so you may see edits in here...

KEZF -- 0.30 total QPF. At 66 hrs, 2m temp is 34.6 degrees. While 850s-1000 are between 0 and +2... 700mb UVV's are near 15 and everything in the column plunges below -7 (besides 950 mb which heads to -3.2) by hr 72... so I am inclined to believe dynamics overcome the temps for a very wet snow here... but if you are south of here its likely a mix

KMRB -- 0.16 total QPF. Upper 20s for temps. 850s are -5.5, next to zero UVV's.

KFDK -- 0.21 total QPF. Upper 20s for temps. 850s are -3.4, next to zero UVV's.

KAPG

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

Guest
This topic is now closed to further replies.
  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...