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2017 Severe Thread


mappy

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3 hours ago, high risk said:

was definitely in a good spot today.   Got the heart of the core here in southern Howard County.   I didn't get the 1" hail that BWI reported, but winds easily gusted in the 45-50 mph range and it was a deluge.

looking ahead, Monday's wind profile suggests a somewhat common westerly flow at all levels with increasing speeds with height  profile which can do well here if you don't wipe out the low-level moisture.

 

meh... it doesn't look too good to me as a severe day

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Meh

Day 4-8 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0348 AM CDT Thu Jun 01 2017

   Valid 041200Z - 091200Z

   ...DISCUSSION...
   ...Sunday/Day 4 and Monday/Day 5...
   The medium-range models including the ECMWF, GFS, Canadian and UKMET
   are mostly in agreement on Sunday with an upper-level ridge in the
   High Plains and an upper-level trough in the Great Lakes. Although
   the models differ on the exact location of a front on Sunday, the
   general consensus shows a front from the Great Lakes
   west-southwestward into the mid to upper Mississippi Valley. This
   corridor would be favored for a severe threat Sunday afternoon and
   evening. On Monday, the GFS, ECMWF and UKMET show an upper-level low
   in the lower Great Lakes with an upper-level trough extending
   southwestward into the Ohio Valley. At the surface on Monday, the
   models show varying positions of the front latitudinally but
   consensus would place the front from the mid Mississippi Valley
   eastward to the Mid-Atlantic. A severe threat would be most likely
   ahead of the upper-level trough along the front in the Mid-Atlantic
   where deep-layer shear is forecast to be stronger. Spatial
   uncertainty is substantial for Sunday and Monday.
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  • 2 weeks later...
2 hours ago, WxWatcher007 said:

This has been a good season IMO, even if we suck the rest of the way.

I think the potential this year has been encouraging.  That said it has been a poor turnout in my neck of the woods so far other than the freak Feb. storm which featured the heaviest hail I have ever seen with 50 mph. wind gusts, and a green sky to boot!  Anyhow, I would not be happy at all if it sucked the rest of the way.  I am awaiting the mid summer boomers that crop up unannounced from time to time.  Those are the storms that often excite me the most even if they tend to be more discreet and less inclusive region wide.  They often have the best lightning too, plus can pop up in the middle of the day or night.

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5 hours ago, WxWatcher007 said:

This has been a good season IMO, even if we suck the rest of the way.

For Southern MD/DC and south it has been a somewhat respectable season in my mind but north of there it has been a fail in my book especially around the MD/PA state line. Can't remember the last time we had so little action. 

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Watcher - the most frustrating thing, I think, for those of us from Balt City up to the MD/PA line, say, has been that there has been really good severe weather in lots of PA, and the severe weather you mentioned that has been present from DC south, but in between? It has been really hard to get good severe in here this year. Or even garden variety storms this year for that matter. One storm with some thunder since mid-February for my area, that's it. Growing up in the Midwest (Ohio) and then living in Memphis for 11 years before moving here in 2009, I was certainly used to legit thunderstorms (or even just plain ol' storms) on the regular. It has been absolutely barren this year, as bad a stretch as I have seen since moving here, in terms of storms, for my part of the area anyway.

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On ‎6‎/‎11‎/‎2017 at 0:33 PM, WxWatcher007 said:

Well, it could be good here and bad up your way because severe can be so localized. The way I see it, we've had multiple supercell days in the region, at least two tornado days, and a confirmed tornado in DC proper. That's hard to beat in the short time span I've been living in this area. 

Haven't been any real big light shows yet, or big wind days from what I can remember. 

I definitely agree with the post above, but I do live between Waldorf and LaPlata. We experienced the best supercell and tornado of the season(so far) in February. Several minutes of sustained roaring wind and rising motion leading into the supercell was a visual and audio treat. The event was not so cool as it was happening, since F1 the tornado was totally rainwrapped inside of a severe windfield. Several other supercells down here and near work in Alexandria as well. Those north of here and especially north of DC have had a much different experience.

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1 hour ago, yoda said:

Quick aside and for giggles and fun... and since I was bored... check out this sounding from N IL on the 12z NAM at hr 63 :o

unbelieveablesoundingfromNIL12zNAMathr63.thumb.png.0d68b65095987706135c18d6de75e6a9.png

 

Perhaps I was only a little early on my June 13th severe prediction?:lol:

But seriously if a sounding like that could be over the DMV area and be only a couple hours out we'd be golden...and by that I mean specifically us wxweenies not everyone else lol.

Okay getting a wee bit bantery...I'll tone it down. 

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Day 3 (Monday) SPC Outlook

...western Carolinas northward into New England...
   Clusters of showers/thunderstorms will likely be ongoing from the OH
   Valley southwest into portions of the lower MS Valley.  Despite
   relatively weak mid-level lapse rates, ample low-level moisture
   (surface dewpoints ranging from the 60s-lower 70s degrees F from
   north to south) combined with strong heating to the east of the
   early-day convection, will contribute to moderate destabilization. 
   Models show neutral to weak 500-mb height falls and 30-40 kt
   southwesterly 500-mb flow overspreading the western portion of the
   warm sector during afternoon.  Developing bands of strong to severe
   thunderstorms are forecast with isolated to scattered 50-65 mph
   gusts expected to result in several corridors of scattered wind
   damage from the more intense thunderstorms.  Marginally severe hail
   will be possible, especially with more discrete cellular activity. 
   The storm clusters will likely move towards the Mid-Atlantic coast
   and through the lower Hudson Valley during the evening.  The loss of
   heating and the cooler/more stable marine influence near the
   immediate coast in southern New England may temper the overall
   severe risk, as storms move into the region from the west primarily
   after dark.
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In all seriousness though the flood setup for Monday is decent.  Good front punching into a moisture rich environment that has decent jet dynamics.  Probably going to be a marginal TOR or wet microburst setup.  We sometimes see a tornado watch and flash flood watch at the same time during these events. 

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