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June 4-10, 2022 | Severe Storms (Quasi-zonal regime)


ClicheVortex2014

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2 hours ago, snowlover2 said:

Large slight risk added for along and south of I-70 in the OV/TN Valley areas for tomorrow.

18z NAM looking interesting around here late tomorrow. Slight negative tilting vort.

Edited by junior
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Interesting 

From KIND

While quiet weather reigns here tonight...convective development well to our north and west will be critical in determining how Wednesday afternoon and evening evolve locally. Already this afternoon...storms are increasing in coverage over the north central Rockies and near front range of Wyoming and soon to be south into Colorado as well. This is in response to a strong upper low diving south into the area and what appears to be an MCV in northeast Wyoming. Further upscale development is anticipated for the rest of the day as the system expands east into the High Plains...then tracking east-southeast along the theta-e ridge as an MCS that should eventually make it into the Missouri Valley and Ozarks before weakening Wednesday morning. There is potential for high level convective cloud debris from this system to make it into the Ohio Valley on Wednesday morning but overall model trends have largely pulled back on more substantial impacts locally in the morning as bulk of the storms should diminish well to our west. While a few showers may make it into the forecast area before weakening...expect largely dry conditions Wednesday morning. And even decent cloud coverage through midday may not have much impact on how the atmosphere evolves for later in the day. The upper wave and remnant MCV are both poised to shift east into the Ohio Valley Wednesday afternoon as the MCS remnants reorganize over the Tennessee Valley. With model soundings indicating modest instability and decent BL shear with southeast winds over the region...there is growing concern for scattered severe weather developing over the area. There remain a number of details that we do not yet have the answer to and probably will not until early Wednesday as the expected convective development east of the Rockies and in the High Plains is only in its infancy at the moment. But that being said...there is a wild card that could play a huge factor in convective intensity and coverage over central Indiana...the frontal boundary over the region now and set to return north as a warm front Wednesday. Where that sets up and just how intense the surface wave that rides it ends up being are going to be important. Both are likely to contribute to a zone of enhanced directional shear which could present the potential for rotating storms and a tornado risk for a few hours in addition to the damaging wind and large hail threats. A couple of the 12Z models...the NAMNest and NSSL WRF in particular...are deepening the surface wave to sub-1000mb levels which is somewhat rare in June over the Ohio Valley. While the model suite is in agreement that some collaboration of the features mentioned above will be in the region Wednesday afternoon and evening...suspect the NAMNest and NSSL WRF are overdoing the strength of the surface wave at this point. So what does this mean at this point? There is enough model agreement to acknowledge the potential for a higher impact severe weather scenario locally Wednesday afternoon and evening. But as is usually the case...the risk is somewhat conditional on the parameters and features highlighted above aligning properly. And not sure we will have a more definitive answer until Wednesday morning. At this time...prepare for the potential for scattered severe storms later on Wednesday across the region and especially near and south of I-70...and continue to monitor as we make adjustments and add detail tonight and Wednesday.

Edited by StormfanaticInd
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19 minutes ago, StormfanaticInd said:

Nam for tomorrow

image.thumb.png.6b00f704e6de3f22bd5d88a5917b45ad.png

Looks like what happens with the MCS tonight will have huge impacts on tomorrow. The fact that the MCS hasn't even started to develop yet makes these runs almost useless. They are fun to look at though.

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54 minutes ago, ClicheVortex2014 said:

Looks like what happens with the MCS tonight will have huge impacts on tomorrow. The fact that the MCS hasn't even started to develop yet makes these runs almost useless. They are fun to look at though.

True but worth keeping a very close eye on. Parameters are actually pretty decent 

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0z HRRR looks good for multiple rounds of storms at least. Deep-layer shear will be sufficient for supercells but directional shear is pretty questionable. If it is favorable for supercells, they'd be splitting supercells.

floop-hrrr-2022060800.refcmp.us_ov.gif.b5a52142933f8a98e9584dafbf6728de.gif

 

image.png

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