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June 1, 2012 - Severe Thunderstorms/Tornadoes Event


Kmlwx

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The aforementioned discussion from SPC for our region:

...CENTRAL APPALACHIANS AND UPPER OH RIVER REGION TO MID-ATLC AND CAROLINAS... SCATTERED-NUMEROUS TSTMS ARE EXPECTED TO DEVELOP IN BAND NEAR OR AHEAD OF SFC COLD FRONT BY MIDDAY...OVER WRN PORTIONS OUTLOOK AREA...THEN MOVE NEWD WHILE BACKBUILDING SWD. NET EFFECT SHOULD BE EWD SPREAD AND INCREASE IN BOTH CONVECTIVE COVERAGE AND SVR POTENTIAL AS FOREGOING AIR MASS DESTABILIZES DIURNALLY. DAMAGING GUSTS APPEAR LIKELY WITH DOMINANT QUASI-LINEAR STORM MODE...ENHANCED LOCALLY BY TRACKS OF BOW/LEWP FORMATIONS. MANY WIND-DAMAGE EVENTS MAY OCCUR...ALTHOUGH FCST LOW-LEVEL WIND PROFILES DO NOT YET APPEAR STRONG ENOUGH TO SUPPORT ORGANIZED THREAT OF SIGNIFICANT GUSTS OF 65 KT OR GREATER. PATCHES OR CLUSTERS OF CONVECTION ALSO MAY BECOME SFC-BASED DURING MIDDAY THROUGH AFTERNOON IN FOREGOING WARM SECTOR...AMIDST STRENGTHENING DEEP-LAYER SHEAR PROFILES FAVORABLE FOR SVR. GREATEST RELATIVE SPATIAL OVERLAP/DENSITY OF TORNADO POTENTIAL MAY BE FROM N-CENTRAL/NERN NC ACROSS CENTRAL VA TO CHESAPEAKE BAY REGION. THAT CORRIDOR REPRESENTS SPATIAL OVERLAP OF THREAT FROM 1. EARLIER/MORE DISCRETE AND DIURNAL CONVECTION...WHERE DISCRETE OR EMBEDDED/CLUSTERED SUPERCELLS ARE POSSIBLE BUT SPECIFIC FOCI FOR LOW-LEVEL FORCING ARE MORE NEBULOUS AND UNCERTAIN...AND 2. MORE CERTAIN ARRIVAL OF LATER AFTERNOON/EVENING QLCS ACTIVITY CONTAINING EMBEDDED CIRCULATIONS. FCST HODOGRAPHS...WHILE FAVORABLE IN BOTH REGIMES...DO NOT APPEAR AS LARGE OVER BROAD AREAS AS ON MOST ERN-CONUS TORNADO OUTBREAK DAYS...AND THERE ARE CONSIDERABLE UNCERTAINTIES ATTM REGARDING DENSITY/LONGEVITY OF ANY SUPERCELL MODES. EXTENT/MAGNITUDE OF WARM-SECTOR DESTABILIZATION ALSO REMAINS QUITE UNCERTAIN ATTM...BECAUSE OF LARGE AREA OF ANTECEDENT CLOUD COVER AND PATCHY/CLUSTERED PRECIP. THIS INDICATES DISPLACEMENT BETWEEN MOST UNSTABLE/MOIST MARINE AIR OVER SRN/ERN CAROLINAS AND STRONGEST VERTICAL SHEAR FARTHER N ACROSS PA/WV/MD AND NRN VA. THIS ALSO IS MAIN FACTOR PRECLUDING GREATER SVR PROBABILITIES ATTM. GIVEN THESE FACTORS...PROBABILITIES ARE KEPT WITHIN UPPER REACHES OF CATEGORICAL SLGT RISK BIN FOR NOW...THOUGH UPGRADE IS POSSIBLE LATER TODAY ONCE SOME OF THESE DESTABILIZATION AND MOISTURE FACTORS BECOME BETTER-FOCUSED.
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and one other random thought...to Ian...I don't think people are "way overboard" over this system on this forum anyway...I think they have been discussing it. It has been so long since we've had anything to discuss, I don't see where any of the discussion here has gone over to anything other than normal talk of a potentially interesting weather day. I do have a little perspective on severe weather from my years growing up in Ohio and then living in western TN. Days like this were a dime a dozen when I was in Memphis from 1998 - 2009, but it still is interesting weather for over this way, even under a slight risk of tornado dome, even if parameters are not perfect. And, obviously, given this part of the country, its hard to get parameters ever totally perfect.

Nevertheless, I have found the discussion of whatever we get today, including our likely low cloud deck bust to be appropriate, given the modeling of something that might be more.

In any event, continued good luck to you guys on your current chase...

ETA: was referencing this post, Ian:

I would love to be there for a good threat and it looks like the best in a while... I just think the area or perhaps the northeast as a whole tends to go way overboard with this stuff. I might be totally wrong but the day just does not seem as amazingly incredible as a lot of people see it.
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you would fit in well at the philly forum

are you any good at whining over near misses?

I'm guessing the weenie tags didn't give it away that i was mocking weenies

Your right, I deleted it. Sorry bout that.

I appreciate you sticking up for us MAers :)

LWX language makes me pretty confident at least one EF-4 will hit the area. Perhaps a half dozen. There are 26 thes in the discussion which correlates heavily to strong rotating updrafts.

BRING IT!

Is there any McDonalds around Hereford? Thinking about starting in that area, but the closest one I see is in Cockeysville. Figuring 83 is right there, if we need to get up into PA fast, and possibly west on 70 if need be. Thoughts?

Come visit me!!!

Well we'll be headed to Cockeysville, MD tomorrow. Leaving around 7:30 AM so we should be there around 2 PM or so.

Good man! Let me know where you end up in CVille

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Also with the talk of a possible upgrade to mod risk... 15% tor is mod risk and 45% wind is mod risk... so we shall see if we do get a mod risk which one is being raised to higher probs

If they do decide to go with MDT, I doubt they will bump the tornado risk any higher. I was already surprised at the 10% probs this morning.

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Oh Christ, I'm gonna be near both you and Fozz? lol We're meeting at the McDonalds around 2ish, he can get data there.

Yes - but its me :) You going to the same McDonald's Wiz is?

I'll be at the McDonalds in Cockeysvile.

Sunshine :thumbsup:

Sweet!! The one north on York Road near Shawan Road?

Looking at satellite there certainly are clouds around but appears to have a good amount of breaks and hopefully the sun can help to burn some more off as well.

I'm at work now in the city and its overcast, but there were breaks of clouds up north in Cockeysville where the sun was shining

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Yes - but its me :) You going to the same McDonald's Wiz is?

Sweet!! The one north on York Road near Shawan Road?

I'm at work now in the city and its overcast, but there were breaks of clouds up north in Cockeysville where the sun was shining

Yup, we're meeting there, and figuring out the gameplan from there. I just know we gotta be away from BWI in general once the rush hits.

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Yup, we're meeting there, and figuring out the gameplan from there. I just know we gotta be away from BWI in general once the rush hits.

Good stuff - you will be far enough from BWI in Cockeysville. The hubby and I are planning on heading over to his office this evening to watch the storms from there, its got a nice view west while our residence does not.

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Yup, we're meeting there, and figuring out the gameplan from there. I just know we gotta be away from BWI in general once the rush hits.

Should have told me! I would have went! You gonna be on radar scope chasers location?

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The RAP develops about 1000-1500 J/KG of SBcape a bit later on across MD...MLcape values are only around 500 J/KG or so though, I would guess the weak mlvl lapse rates are hurting this a bit. mlvl lapse rates right now are only 5.5 C/KM which is pretty blah...models had them around 6 C/KM so we'll see if they steepen a bit...they could as the trough approaches and some cooler air advects aloft.

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