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July 1-21, 2022 | Ring of Fire/MCS Outbreak Sequence


ClicheVortex2014

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  • Meteorologist

Warning in NE MT... severe storms moving at 75 mph.

Quote

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Glasgow MT
1036 PM MDT Sat Jul 9 2022

The National Weather Service in Glasgow has issued a

* Severe Thunderstorm Warning for...
  Daniels County in northeastern Montana...
  Roosevelt County in northeastern Montana...
  Northeastern Valley County in northeastern Montana...
  Sheridan County in northeastern Montana...
  Northern McCone County in northeastern Montana...
  Northern Richland County in northeastern Montana...

* Until 1130 PM MDT.

* At 1036 PM MDT, severe thunderstorms were located along a line
  extending from near Richland to 6 miles east of Frazer, moving east
  at 75 mph.

  HAZARD...70 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Wolf Point, Plentywood, Scobey, Poplar, Culbertson, Richland,
  Nashua, Brockton, Medicine Lake, Bainville, Froid, Westby,
  Flaxville, Archer, Port Of Raymond, Peerless, Port Of Whitetail,
  Lustre, Madoc and Bredette.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4794 10405 4794 10635 4900 10639 4900 10405
TIME...MOT...LOC 0436Z 254DEG 67KT 4885 10594 4804 10589 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...OBSERVED
MAX WIND GUST...70 MPH

 

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Not really broken-hearted that I got moved out of the slight.  Too wet already, and crops look too good for wind and/or hail.

 

Just jinxed the rest of the summer I suppose.

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  • Meteorologist

About as many damaging wind reports as you can get from a derecho in this area

Derecho #5425 of 2022

image.png.6fd2b6439be90557f4fef0e9385371a8.png

 

HRRR poses some questions about later today. It's showing modest instability, mostly weak low-level winds until ~23z.  Then you get this sounding in east-central MN.

I think HRRR might be mixing too much because SPC says >2" diameter hail is possible. If there's enough instability for that, combined with the seasonably strong deep layer shear, there should be at least one really impressive supercell. We'll see what it can do with those low-level winds.

image.thumb.png.b19732b6e22488b9994999f475c3d02b.png

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  • Meteorologist

Really complex situation with respect to instability vs. directional shear in Minnesota. There's a little bit of everything. Northwesterly winds, westerly, southwesterly, southerly, southeasterly. 

image.png

Edited by ClicheVortex2014
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1 hour ago, ClicheVortex2014 said:

NAM/HRRR completely fumbled the forecast today. Neither model had the early afternoon severe storms which turned out to kill the potential for later.

Downgraded to marginal risk

 

image.png.6c37d999e5c9d10652e6719b614afa51.png

The atmosphere didn't destabilize nearly as aggressively as models forecasted as the MCS/Derecho last night moved through either, guessing that factored in with those early afternoons storms

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58 minutes ago, Neoncyclone said:

The atmosphere didn't destabilize nearly as aggressively as models forecasted as the MCS/Derecho last night moved through either, guessing that factored in with those early afternoons storms

Definitely didn't help that the storms developed several hours earlier than HRRR thought. Still no storms in Minnesota but there are some really nasty looking storms in western South Dakota

image.thumb.png.eed779910ecb9b837678392cb918f413.png

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Off to an early start today.

Quote
 URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 459
   NWS Storm Prediction Center Norman OK
   540 AM CDT Mon Jul 11 2022

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Eastern Iowa
     Northwest Illinois

   * Effective this Monday morning from 540 AM until 1100 AM CDT.

   * Primary threats include...
     Isolated damaging wind gusts to 70 mph possible
     Isolated large hail events to 1 inch in diameter possible

   SUMMARY...A cluster of storms along/north of Interstate 80 may
   continue to pose a severe wind (and possibly some hail) risk across
   eastern Iowa toward the Quad Cities vicinity and north through the
   early morning hours.

   The severe thunderstorm watch area is approximately along and 35
   statute miles north and south of a line from 20 miles west northwest
   of Cedar Rapids IA to 35 miles northeast of Moline IL. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   OTHER WATCH INFORMATION...CONTINUE...WW 458...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
   cumulonimbi with maximum tops to 550. Mean storm motion vector
   27045.

   ...Guyer

 

 

ww0459_radar.gif

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