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2024 Short/Medium Range Severe Weather Discussion


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Always surprises me that CG's come in a variety of sizes. Just had a popcorn fart from a tiny cell over the house a minute or two ago. Sounded like someone shot a shotgun off in the alley behind the house. Baby bolt.

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6 hours ago, bowtie` said:

Always surprises me that CG's come in a variety of sizes. Just had a popcorn fart from a tiny cell over the house a minute or two ago. Sounded like someone shot a shotgun off in the alley behind the house. Baby bolt.

Happened to me a few times at the dog park the other day from a similar tiny pop up cell. I like your description, it's very accurate 

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Looks like that corridor from Van Wert to Lima OH is in for another severe storm. I do not know what it is about that lane of geography, but storms really do seem to like that area, year after year after year.

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3 hours ago, bowtie` said:

Looks like that corridor from Van Wert to Lima OH is in for another severe storm. I do not know what it is about that lane of geography, but storms really do seem to like that area, year after year after year.

I blame Rick McCoy, a fellow Emergency Manager for that. He was originally a broadcast met in Ft. Wayne and has been the EMA Director in Van Wert Co., OH for decades. I always said that severe weather follows him wherever he goes, and Wan Wert County has seen a disproportionate share of severe weather, including numbers of tornadoes, in this region over the past 25 years.

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Overnight HRRR runs starting to get a little frisky with firing warm sector supercells in southwestern WI to far north-central IL.

 

Quote
   ...MN/IA into WI/IL...

   A surface low is forecast to deepen over the Mid-MO Valley during
   the afternoon/evening. A warm front will extend east/southeast from
   the low across northern IA/IL. Thunderstorms are expected to develop
   in a warm advection regime in the vicinity of the surface warm
   front. However, it remains uncertain if warm-sector convection will
   develop, or if convection will mostly be elevated to the cool side
   of the warm front. Regardless, forecast soundings indicate supercell
   wind profiles amid a very moist (70s F dewpoints) and unstable
   airmass. Elevated convection will pose a risk for large hail. If
   warm midlevel temps/capping can be overcome and storms develop with
   the warm sector, all severe hazards will be possible, including a
   couple of tornadoes. Initial cellular convection will likely develop
   into a more linear, forward-propagating mode during the evening as
   storms move into southern WI and northern IL. Given uncertainty
   regarding warm sector development, have maintained probabilities
   from the previous Day 2 outlook, but upgrades could become necessary
   if trends toward warm-sector supercell development increase.

 

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14 minutes ago, CheeselandSkies said:

Annnnd the 10/11/12Z runs backed off, go figure.

Cool ENE surface flow this morning. I’m selling any sig severe chances in Southern Wisconsin 

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15Z run has it back...this tells me this setup is right on the line of a warm sector cap bust and a potent tornadic supercell or two.

Also quite a few more supercells behind that lead batch...they would likely not be entirely surface-based but could be capable of producing wind/hail and heavy rain.

Worth nothing the HRRR is not completely on an island, the 12Z HRW WRF-ARW also fires a few supercells along the WI/IL state line in the 23-00Z timeframe.

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Decent-sized TDS near Waukon, IA persisted for several scans. At least one visible wedge occurred in south-central MN earlier. There was a "confirmed" tornado along the WI/IL state line around 0030 UTC but until I see otherwise I think it was a suspect public report. The storm collapsed shortly after. Maybe I'm just salty because I didn't pull the trigger on a chase in that area.

ARX_0337.png

ARX_0337_CC.png

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IWX is receiving numerous damage pictures from areas that paralleled the rotation on radar from this morning’s warned supercell. EMA is currently investigating and will report later this afternoon, the results of IMG_0879.thumb.png.75a60f0a7be1b383e183f7a50a5c123a.pngwhich will determine whether surveys will be completed.

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1 minute ago, Chinook said:

confirmed tornado near Cleveland (Parma/Seven Hills)

confirmed tornado cleveland 1.jpg

 

Thankfully that one seems to be weakening a bit, but the one offshore the lake looks nasty for areas east like Mentor.

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More than half of Lake and Geauga Counties are still without power in NE Ohio, with outage numbers barely budging in Cuyahoga County since last evening (down slightly to a bit over 200k outages/38% out in the county). Impressive event with what will likely be a handful of confirmed tornadoes and widespread straight-line wind damage. 

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NWS offices have been putting the final touches on info regarding the July 14th and July 15th (Derecho) severe t'storm events in the area.

For the severe t'storm event on July 14th, LOT and ILX have confirmed that 14 tornadoes occurred across their CWA's. (9 LOT & 5 ILX).

1427499678_July14thOverviewGraphic.thumb.png.cbfc8812f2d54ef5605f98122cf65886.png

454448835_915365727285783_4919112897553279061_n.thumb.jpg.3d72b4b7d55e2617050248feb4099f77.jpg

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The Michigan tornado will be rated at least EF-1. This was just sent out by the IWX WCM: 

Our damage survey of St. Joseph is complete. We can confirm at least an EF-1 tornado from north of Lewis Lake at the county line, went southeast and ended on N Maine St. in Three Rivers. We will internally discuss amongst us at the office on rating and estimated wind speed, but it was at least on the upper end of an EF-1. Thank you for your patience and assistance. Somebody back at the office will release a PNS shortly containing much of the same info. 

It might be this evening before official path width/length and wind speed are released.

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