Jump to content
  • Member Statistics

    17,587
    Total Members
    7,904
    Most Online
    LopezElliana
    Newest Member
    LopezElliana
    Joined

Severe weather thread number ...I think X ?


Typhoon Tip

Recommended Posts

  • Replies 1.7k
  • Created
  • Last Reply

DAY 2 CONVECTIVE OUTLOOK

NWS STORM PREDICTION CENTER NORMAN OK

1230 PM CDT WED JUL 25 2012

VALID 261200Z - 271200Z

...THERE IS A MDT RISK OF SVR TSTMS FROM OH TO PARTS OF THE

NORTHEAST...

...THERE IS A SLGT RISK OF SVR TSTMS FROM THE UPPER GREAT

LAKES/MID-MS VALLEY NEWD TO SRN NEW ENGLAND...

...POTENTIAL FOR A WIDESPREAD DAMAGING WIND EVENT/DERECHO ON THU

AFTERNOON FROM PARTS OF THE MIDWEST TO THE NORTHEAST...

..SYNOPSIS

VIGOROUS SHORT WAVE TROUGH OVER THE SRN CANADIAN PRAIRIES WILL MOVE

SEWD AND REACH THE UPPER GREAT LAKES BY EARLY FRI...WITH A

MODERATELY FAST ZONAL FLOW REGIME EXISTING DOWNSTREAM ACROSS THE

NERN CONUS. AT THE SURFACE...A WARM FRONT WILL ADVANCE NEWD IN THE

NORTHEAST AND SHOULD REMAIN QUASI-STATIONARY ACROSS THE CNTRL GREAT

LAKES. A SERIES OF WEAK CYCLONES SHOULD BE PREVALENT ALONG THIS

BOUNDARY...WHICH WILL INTERSECT A SLOW-MOVING COLD FRONT MOVING SEWD

FROM THE MID-MS VALLEY TO THE SRN PLAINS. IN THE WEST...MID-LEVEL

RIDGING WILL BUILD FROM THE SOUTHWEST ACROSS THE INTERMOUNTAIN WEST.

..MID-MS/OH VALLEYS TO THE NORTHEAST/SRN NEW ENGLAND

CONFIDENCE CONTINUES TO GROW WITH POTENTIAL FOR SCATTERED TO

NUMEROUS ORGANIZED SEVERE TSTMS...PARTICULARLY FROM THE MIDWEST TO

THE NORTHEAST. AN MCS SHOULD BE ONGOING ACROSS PARTS OF THE LOWER

GREAT LAKES...SUPPORTED BY AN INITIAL MID-LEVEL SPEED MAX AND ROBUST

LOW-LEVEL WAA ADVECTION. THIS SHOULD RETARD THE NERN ADVANCEMENT OF

THE WARM FRONT AND SUBSEQUENT EVOLUTION OF THIS ACTIVITY DOES BREED

UNCERTAINTY OVER WHERE THE FRONT WILL ULTIMATELY ANCHOR.

AN EXPANSIVE UNCAPPED WARM SECTOR CHARACTERIZED BY 90S/60S SURFACE

TEMPERATURES/DEW POINTS WILL CONTRIBUTE TO MODERATE TO STRONG

BUOYANCY THU AFTERNOON WITH MLCAPE OF 2000-4000 J/KG. A LARGE SWATH

OF 30-50 KT 700-500 MB WLYS WILL OVERLAP THIS INSTABILITY...AND WITH

WEAK MID-LEVEL HEIGHT FALLS COMBINING WITH FRONTAL

CONVERGENCE...THIS SETUP WILL YIELD SCATTERED TO NUMEROUS TSTMS

FORMING ALONG AND AHEAD OF THE COLD FRONT. THE UNIDIRECTIONAL WIND

PROFILES AND STEEP LOW-LEVEL LAPSE RATES SHOULD SUPPORT UPSCALE

GROWTH INTO SEVERAL CLUSTERS WITH BOWING SEGMENTS AND EMBEDDED

SUPERCELL STRUCTURES. DAMAGING WINDS /POTENTIALLY WIDESPREAD AND

SIGNIFICANT/ WILL BE THE PRIMARY THREAT.

A RELATIVELY NARROW CORRIDOR OF ENHANCED TORNADO RISK SHOULD DEVELOP

ALONG THE WARM FRONTAL ZONE WHERE EFFECTIVE SRH AND STRONGEST

DEEP-LAYER SHEAR WILL BE MAXIMIZED. ALTHOUGH PINPOINTING THIS

CORRIDOR IS DIFFICULT GIVEN LIKELIHOOD OF PRECEDING OVERNIGHT

CONVECTION...IT APPEARS MOST PROBABLE FROM PARTS OF NY INTO SRN NEW

ENGLAND. SOME CONVECTION-ALLOWING GUIDANCE SUGGESTS THAT DISCRETE

CONVECTION MAY FORM WITHIN A PERSISTING WAA REGIME THU AFTERNOON.

Link to comment
Share on other sites

Everything continues to look impressive for the CT River Valley and points southwest. I'm interested to see what the Euro does.

I do think we will see a tornado threat develop on the northern axis on the best instability/theta-e ridge where the strongest shear and low level backed winds exist. I think from EWR points south the threat is more of a damaging MCS that approaches later in the day.

SREF_prob_combined_sigtor__f036.gif

This are pretty impressive values for the Northeast.

I wouldn't focus so much on the location of this bullseye, so much as what it is saying about the environment near the warm front/triple point.

Link to comment
Share on other sites

Everything continues to look impressive for the CT River Valley and points southwest. I'm interested to see what the Euro does.

I do think we will see a tornado threat develop on the northern axis on the best instability/theta-e ridge where the strongest shear and low level backed winds exist. I think from EWR points south the threat is more of a damaging MCS that approaches later in the day.

Agreed completely. CT river valley from Springfield south is my target area for a possible tornado threat

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...