Jump to content
  • Member Statistics

    17,515
    Total Members
    7,904
    Most Online
    wigl5l6k
    Newest Member
    wigl5l6k
    Joined

Severe Weather potential 9/8/12


weatherwiz

Recommended Posts

  • Replies 1.1k
  • Created
  • Last Reply

LOL, model sim radar is just that. If there were reds on the 12z run over Albany and now they are oranges..it means nothing...nothing. You have to look much deeper.

I never look at that stuff from the gfs or nam... It's basically worthless. If you want to use hires mesoscale models like the mm5 or HRRR for a 6 hour forecast that's fine but using the nam and comparing runs is laughable. Look at a sounding people!

Link to comment
Share on other sites

From BTV:

THERE REMAINS SEVERAL CONCERNS WITH THIS SYSTEM. FIRST IS

WIND...INCREASING OUT OF THE SOUTH DURING THE DAY SATURDAY AS LOW

DEEPENS AND PRESSURE GRADIENT TIGHTENS. LOCAL MESOSCALE MODELS

ALONG WITH REGIONAL 12KM NAM CONTINUE TO SHOW A STRONG LOW LEVEL

JET OF 30-40KTS AT 925MB AND 50-60KT AT 850MB AHEAD OF THE

AFOREMENTIONED COLD FRONT. SOUTH WINDS WILL LIKELY BE 15-25 MPH

WITH GUSTS OF 30-45 MPH ACROSS MUCH OF THE REGION SATURDAY BEYOND

MID-MORNING IN ADVANCE OF PRECIPITATION...THEN LOWERING SOME WITH

PBL STABILIZATION IN THE VALLEYS ONCE RAIN BEGINS. SECOND CONCERN

IS THAT WE COULD SEE AN EMBEDDED NARROW SQUALL LINE WITHIN THE

MAIN RAIN SHIELD THAT WOULD BE ASSOCIATED WITH A STRONG WESTERLY

WIND SHIFT AS FRONT COMES THRU SATURDAY EVENING. STILL A BIT

EARLY TO SAY...BUT SPC HAS PORTIONS OF THE REGION IN MODERATE RISK

FOR DAMAGING WINDS (>50 MPH) WITH THE CONVECTIVE LINE IF THINGS

COME TOGETHER WITH STRONG ISALLOBARIC GRADIENT AND ASSOCIATED

INSTABILITY.

Link to comment
Share on other sites

KI surge and good lapse rates. Told clients activity may approach terminal which is a good heads up. That allows for alternate planning in case thunder approaches. That's sort f why I mentioned it yesterday although activity was only sct.

Awesome, I thought you were talking about Kevins no call a couple hours ago.

Link to comment
Share on other sites

Is there really anything that would trigger organized convection out ahead of the main line other than the pre-existing outflow boundary?

The thing is, though, there might be - there is much more lift this time around than during the 7/26 event since there is a lot more synoptic lift with the huge trough, as HM said. So as long as we can find breaks of sun, perhaps the large-scale ascent can extend eastward enough so that we can actually have much more in the way of organized, discrete convection than we did during the 7/26 event. The instability also greatly lagged the forcing in the 7/26 event as well, so anything discrete either quickly died or got absorbed by the main line. Plus the low-level shear profiles are much more impressive.

Quite possible..strong divergent 250 flow from west-southwest above a strong LL S'ly flow. Classic set up for svere storms to develop along and to the left of the LLJ and to the south of the ULJ. Good setup for fall severe in NEUS

Link to comment
Share on other sites

Archived

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...