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2015 Short Term Severe Weather Discussion


Hoosier

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Neat MCV feature just south of Indianapolis, heading for SW Ohio like a bowling ball. There's a bit of rotation in the bookend vortex... not tornado warning worthy yet.

post-29453-1436301664_thumb.png

I was just going to post about that. Can really see that whole mass rotating on radar loop.

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I was just going to post about that. Can really see that whole mass rotating on radar loop.

Would've been crazy to see a tornado warning from that... it was pretty close. I'm looking forward to the rain from it. Mesoanalysis has PWATs over 2" associated with it.

 

WPC's latest QPF has over 3" of rain for most of the OV/mid-Mississippi valley in the next 7 days... most of which comes from days 4-7.

http://www.wpc.ncep.noaa.gov/qpf/p168i.gif?1436302443

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Tornado watch is probable. 

 

SJeft4d.gif

 

MESOSCALE DISCUSSION 1322
   NWS STORM PREDICTION CENTER NORMAN OK
   0109 PM CDT WED JUL 08 2015
 
   AREAS AFFECTED...SOUTHERN/EAST-CENTRAL MO TO SOUTHERN IL/FAR WESTERN
   KY
 
   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 
 
   VALID 081809Z - 082015Z
 
   PROBABILITY OF WATCH ISSUANCE...60 PERCENT
 
   SUMMARY...THE POTENTIAL FOR A COUPLE OF TORNADOES/WIND DAMAGE IS
   EXPECTED TO GRADUALLY INCREASE THROUGH MID/LATE
   AFTERNOON...INITIALLY WITHIN A CORRIDOR ACROSS THE SOUTHERN THIRD OF
   MO /INCLUDING THE I-44 VICINITY SOUTHWARD/ AND SUBSEQUENTLY INTO FAR
   SOUTHERN IL/FAR WESTERN KY. CONVECTIVE TRENDS WILL BE CLOSELY
   MONITORED THIS AFTERNOON FOR THE POSSIBILITY OF A TORNADO WATCH
   ISSUANCE.
 
   DISCUSSION...SUBJECTIVE SURFACE ANALYSIS FEATURES A 1011 MB SURFACE
   LOW ACROSS SOUTHWEST/WEST-CENTRAL MO AT MIDDAY...WITH A STRONG
   BAROCLINIC ZONE/WARM FRONT EXTENDING EASTWARD FROM THE LOW ACROSS
   THE SOUTHERN THIRD OF MO INTO AREAS GENERALLY NEAR THE OH RIVER IN
   KY AND FAR SOUTHERN PORTIONS OF IL/INDIANA. ON THE EASTERN FRINGE OF
   EARLY DAY CLOUD COVER/PRECIPITATION AHEAD OF A COLD FRONT...SOME OF
   THE SHOWERS/UPDRAFTS ACROSS SOUTHERN MO HAVE SHOWN MODEST SIGNS OF
   DEEPENING SINCE LATE MORNING WITHIN AN INCREASINGLY WARM/MODEST
   UNSTABLE BOUNDARY LAYER AND RELATED CORRIDOR OF MODEST CLOUD BREAKS
   PER VISIBLE SATELLITE.
 
   GIVEN AN INCREASINGLY WEAKLY CAPPED/UNSTABLE BOUNDARY LAYER AND
   PROBABLE STRENGTHENING OF LOW/MID-TROPOSPHERIC WINDS THROUGH LATE
   AFTERNOON/EARLY EVENING...THERE IS CONCERN FOR THESE DEEPENING
   SHOWERS/THUNDERSTORMS TO ACQUIRE LOW-LEVEL ROTATION AS THEY
   INTENSIFY. LOCALLY DAMAGING WINDS MAY BE A POSSIBILITY ACROSS THE
   REGION...BUT A TORNADO RISK MAY EXIST PARTICULARLY WITH STORMS
   DEVELOPING NEAR/INTERACTING WITH THE AFOREMENTIONED WEST-EAST
   FRONTAL ZONE.

 

 

It's impressive how well-defined the warm sector is for July's standards.

XdsurBb.gif

h6GuKbJ.png

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The August 2008 analog is a memorable one for me...tor went by just a few blocks from my home.

http://www.weather.gov/lot/2008aug04

WRT the next few days...

NAM with some decent MLCAPE and more days of 80+ DPs...

No shortwave really sticks out massively...but the fuel will be there for an MCSs that can get a cool pool going

The inspiration for my avatar.

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I find it a bit interesting there is no risk area locally for Friday, all models show redevelopment along the front in the state. The wind profile isn't sheared much directionally but there is decent speed shear good for some linear convective systems. I do think Sunday will be the bigger day but Friday isn't too bad either.

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I find it a bit interesting there is no risk area locally for Friday, all models show redevelopment along the front in the state. The wind profile isn't sheared much directionally but there is decent speed shear good for some linear convective systems. I do think Sunday will be the bigger day but Friday isn't too bad either.

Agreed...Friday looks pretty decent along the boundary into michigan...

Sunday into Monday looks like it could have a nice big line developing with some clusters ahead and along a bowing structure

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With how moist the soils are...(I know that's not the end all be all)...I just see repeated bouts of well-fueled and somewhat disorganized MCSs stalling boundaries...not much chance for boundary momentum...so I will side with ALEK...fwiw

The main difference I see are similar situations to a few days ago with elevated DPs to make it feel hotter thanks in part to the oversaturated soils and the sweaty cornfields

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This weekend looks pretty damn hot...  the heat index might be hotter than anything we saw in 2014... which really doesn't say much as last year was pretty boring. It seems I'm in the heat dome opposed to being on the rim of it this past weekend... which would explain why the analogs favor areas to my north.

fi2Sz3p.png

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I find it a bit interesting there is no risk area locally for Friday, all models show redevelopment along the front in the state. The wind profile isn't sheared much directionally but there is decent speed shear good for some linear convective systems. I do think Sunday will be the bigger day but Friday isn't too bad either.

 

 

Agreed...Friday looks pretty decent along the boundary into michigan...

Sunday into Monday looks like it could have a nice big line developing with some clusters ahead and along a bowing structure

 

NAM for Friday looks good - Saturday it gets juiced and Dews at 80 with 5k s/bCAPE stretching from IA eastward to MI.   I would imagine given the environment we've been in, it would good for 1500-2000 MLCAPE if it verifies out.  Provided a weak cap, could get something going.  

 

Sunday looks better though.

 

Heat indicies in the 100s makes for a sweaty weekend.

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