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2023 Short/Medium Range Severe Weather Discussion


Chicago Storm
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East of I69 looks to be the hotspot especially just across the border. I’m hoping for some good ones to roll through. If supercells do form I’m going to go out. Right in the heart of it where I’m staying

Yeah it’s why going to Napoleon and sitting is a great move. Head west or east on 24 to chase
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31 minutes ago, nwohweather said:


Yeah it’s why going to Napoleon and sitting is a great move. Head west or east on 24 to chase

I was thinking about positioning between Findlay and Kenton not far from 30. Hope it’s timed closer to when I’m off work so I can head that way to be ahead of what development goes on and go from there

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Things could get stormy tomorrow. Today's 12km NAM had 3900 J/kg of CAPE in NW Ohio. The models seem to vary on the 0-6km shear of 30kt up to 45 kt (the 18z NAM), which is quite good for summer, but storm relative helicity should not be remarkable. 12km NAM has up to 73 dew points in Indiana.

 

 

refcmp_uh001h.us_mw (1).png

refcmp_uh001h.us_mw.png

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9 hours ago, Chinook said:

Things could get stormy tomorrow. Today's 12km NAM had 3900 J/kg of CAPE in NW Ohio. The models seem to vary on the 0-6km shear of 30kt up to 45 kt (the 18z NAM), which is quite good for summer, but storm relative helicity should not be remarkable. 12km NAM has up to 73 dew points in Indiana.

 

 

refcmp_uh001h.us_mw (1).png

refcmp_uh001h.us_mw.png

Not a bad setup. Concerned a bit with the LCL but I think we could see some solid hail and damaging winds tomorrow. I’d expect a tornado warning somewhere around Toledo with that front hanging out, you just know something will spin along it

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1 minute ago, IWXwx said:

TOL, DTW, and FWA area posters might consider making plans to keep their vehicles safely under cover later today (unless you already need some body work.)

I was just reading about the hail possibly getting to around 2” or a bit bigger. Could be explosive this afternoon if morning convection holds off

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6 minutes ago, SolidIcewx said:

I was just reading about the hail possibly getting to around 2” or a bit bigger. Could be explosive this afternoon if morning convection holds off

Most models have it occurring to my south.  If there is 2" hail I won't mind a miss!

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30 minutes ago, Lightning said:

Most models have it occurring to my south.  If there is 2" hail I won't mind a miss!

On my way to work I found a few areas I can park my company truck. No other co workers for 60 miles and don’t feel like having my windshield smashed lol. Ready to thread the needle on avoiding hail cores if needed

edit: today definitely has that feel to it

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16 minutes ago, SolidIcewx said:

On my way to work I found a few areas I can park my company truck. No other co workers for 60 miles and don’t feel like having my windshield smashed lol. Ready to thread the needle on avoiding hail cores if needed

edit: today definitely has that feel to it

My guess would be Lenawee and Monroe / northern OH day.  If things fire early then add Wayne / Washtenaw up to the thumb into it.  I am likely to far west (based on majority of the models) and get to see some great cloud formations.

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t Discussion
National Weather Service Northern Indiana
1253 PM EDT Thu Jul 20 2023

.SYNOPSIS...
Issued at 1249 PM EDT Thu Jul 20 2023

Severe thunderstorms are expected to develop later this afternoon.
Large hail and damaging wind gusts are the primary concerns. The
severe weather risk concludes by about 10 PM eastern daylight
time. Dry, not as hot and humid, on Friday. &&

.SHORT TERM...(This Evening through Friday)
Issued at 1249 PM EDT Thu Jul 20 2023

Increasing confidence on severe weather occuring later this
afternoon. Large hail and damaging wind gusts are the primary
concerns.

SPC Mesoanalysis temperatures and dew points initialize well this
hour which bolsters confidence in their derived thermodynamic
parameters. A warm front is now approaching the I-94 corridor in
MI while a cold front is between Milwaukee and Chicago. Severe
weather parameters this afternoon, and going forward, are very
favorable for storms capable of large hail, damaging wind, and
perhaps a tornado.

High resolution guidance, mainly the HRRR, has been fairly
consistent run-to-run regarding storm initialization near 3 PM EDT
over far southern MI and northeast IN. Forecast soundings show an
increasing risk of large hail due to enormous CAPE profiles,
Effective Bulk Wind Profiles in excess of 30 knots, SHIP > 1, and
mid- level lapse rates in excess of 6.5 C/km. Damaging wind gusts
are also a concern due to favorable low-level lapse rates and are
perhaps also favored toward Putnam, Van Wert and Allen counties
in Ohio as discreet storms early attempt to become linear through
time.

The tornado risk is meager with small SRH values, generally
unidirectional low-level flow, and LCLs in excess of 1km. Though,
discrete storms toward the warm front would have the greatest
tornado potential due to enhanced helicity there.

Lastly, South Bend and points southwest might miss out on the severe
weather risk because storms seem favored to develop east of there
and then (of course) drift southeast.

High confidence that storms will exit the forecast area by 9-10 PM
EDT; notably sooner for those in southern MI and far northeast IN.
Just a touch cool tonight with lows near 60. Cooler and not as humid
on Friday with dry weather.

 

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