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June 2012 Severe Weather/Convection Discussion


earthlight

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Tomorrows event has virtually no similarities to what happened this morning, completely different synoptic setup.

But you can see the SPC SREF trying to pin an area of probabilities for severe weather -- agreeing with the synoptic discussion we had earlier regarding the mid level height field -- and targeting the Northern Mid-Atlantic near the M/D Line including Southern PA and extending down towards the DC Metro.

SREF_12HR_SVR_PROBS__f039.gif

looks we are are in the 2.5%-5% severe risk box, but judging from the Plains today, seems like these bad boys have a mind of their own this summer.

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Even if tomorrow night's event fails to deliver, looks like we have more chances next week, as per Upton.

TUESDAY NIGHT THROUGH EARLY THURSDAY...THIS APPEARS TO BE AN

UNSETTLED PERIOD.

A WARM FRONT IS FORECAST TO DEVELOP AND MOVE NORTHEAST TOWARD THE

REGION AS A COLD FRONT TRAILING FROM A LOW PRESSURE SYSTEM MOVING

ACROSS SOUTHEAST CANADA MOVES ACROSS THE REGION.

WEST AND NW WIND FLOW ALOFT CONTS AS A HIGH AMPLITUDE RIDGE MOVES

EAST TOWARD THE WESTERN GREAT LAKES. THIS WILL SET THE STAGE FOR A

SERIES OF MCS MOVING SE DOWN THE RIDGE. IN A MOIST MARITIME TROPICAL

AIRMASS...HEAVY SHOWERS AND TSTMS ARE POSSIBLE. BECAUSE OF HIGH FCST

UNCERTAINTY...ONLY 20 PCT POPS ARE IN THE FCST FOR NOW. STAY TUNED.

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this is a more favorable pattern for us than the one this week

f180.gif

Agree, and I think July could be (potentially) active for us given the mean ridge placement in the central US, with a ring of fire set up from the northern Lakes into the Northeast. Taken verbatim, I'd say the above map is more favorable for SNE and NY state. Let's just hope we don't miss to the south and north of us.

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My buddy called me from Virgina, he was driving back to WV where he lives in the panhandle...said he had never seen a storm like that, trees down everywhere, roads closed, passed a shed on fire from a direct lightning strike. He works for the FAA as an ATC so he knows bad weather when he sees it.

Folks, i just dont get how anyone can want this type of weather. Destruction and injury. stay away please.

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If this one is clipping C NJ with non severe, perhaps this bodes well for us on the northern fringe tomorrow?

SREFS, which supposedly nailed the precip this morning, keep the majority of the rain south, and highlight maybe .1 in our area, so maybe...

http://mag.ncep.noaa.gov/NCOMAGWEB/appcontroller?prevPage=Model&MainPage=indexℑ=&page=Param&cycle=06%2F29%2F2012+21UTC&rname=PRECIP+MEANSPRD&pname=precip_p06&pdesc=&model=SREF&area=NAMER&cat=MODEL+GUIDANCE&fcast=Loop+All&areaDesc=North+America+-+US+Canada+and+northern+Mexico&prevArea=NAMER&currKey=model&returnToModel=&imageSize=M

Note that the SREFS, NAM and GFS have all come way south with tomorrow morning's event.

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Greetings from Atlantic County NJ. Waiting it out here to see just how bad it gets. Worst cells as of now look to miss me just to the south.

But the best weather is about 100 miles and beyond to the north and northeast, where the dps have dropped into the upper 40's to mid 50's, i.e.

BOSTON PTCLDY 78 50 37 W9 29.64R

WORCESTER PTCLDY 74 49 41 W8 29.70R

NANTUCKET CLEAR 69 67 93 W9 29.66R

PROVIDENCE PTCLDY 77 61 57 NW5 29.67R

HARTFORD MOCLDY 76 51 41 CALM 29.67R

ALBANY MOCLDY 69 56 62 CALM 29.68R

post-1336-0-90927800-1341032823_thumb.gi

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this is a more favorable pattern for us than the one this week

A NW-SE ORIENTED BAROCLINIC ZONE WILL

EXIST FROM THE NRN PLAINS SEWD INTO THE MID ATLANTIC DAYS 4-6.

PRIMARY ZONE OF CONVECTIVE DEVELOPMENT SHOULD OCCUR ALONG NRN AND

ERN PERIPHERY OF THE UPPER RIDGE AND IN VICINITY OF THE NW-SE

ORIENTED BOUNDARY.

POTENTIAL WILL EXIST FOR CLUSTERS OF SEVERE STORMS AND MCSS TO

DEVELOP ALONG AND NORTH OF THE BOUNDARY WITHIN NWLY FLOW REGIME

ANYWHERE FROM THE DAKOTAS SEWD THROUGH THE OH VALLEY INTO THE

CAROLINAS AND MID ATLANTIC REGIONS. HOWEVER...PREDICTABILITY OF 30%

OR GREATER SEVERE THREAT AREAS APPEARS LIMITED BY TIMING OF MCVS AND

POTENTIAL FOR AREAS OF ONGOING CONVECTION.

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New SPC Day 1 outlook shuts out the entire NYC metro area in regards to severe weather. The fact that there have been over 500 reports of severe storm reports over the Mid-Atlantic and that they are primed for more severe storms tomorrow reminds me of the February 6, 2010 mega blizzard that clobbered the Mid-Atlantic while leaving us hanging dry.

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A NW-SE ORIENTED BAROCLINIC ZONE WILL

   EXIST FROM THE NRN PLAINS SEWD INTO THE MID ATLANTIC DAYS 4-6.

   PRIMARY ZONE OF CONVECTIVE DEVELOPMENT SHOULD OCCUR ALONG NRN AND

   ERN PERIPHERY OF THE UPPER RIDGE AND IN VICINITY OF THE NW-SE

   ORIENTED BOUNDARY.

  

   POTENTIAL WILL EXIST FOR CLUSTERS OF SEVERE STORMS AND MCSS TO

   DEVELOP ALONG AND NORTH OF THE BOUNDARY WITHIN NWLY FLOW REGIME

   ANYWHERE FROM THE DAKOTAS SEWD THROUGH THE OH VALLEY INTO THE

   CAROLINAS AND MID ATLANTIC REGIONS. HOWEVER...PREDICTABILITY OF 30%

   OR GREATER SEVERE THREAT AREAS APPEARS LIMITED BY TIMING OF MCVS AND

   POTENTIAL FOR AREAS OF ONGOING CONVECTION.

So, in a nutshell, the SPC thinks that the same areas being pounded by severe storms these past two days will get the action again next week while we remain in the screw zone? Do you agree with their assessment?

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