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Short-Term Severe/Flooding Discussion


Quincy
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I’m in hays now just chilling. Its my birthday and I have my gear with me and will probably just camp around here tonight and then position for tomorrow around DDC. Keeping it low key and lazy. I could go to CO and maybe chase whatever forms today but don’t really feel like it. This hammock life is too clutch rn. 

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Victor Gensini and myself will be out tomorrow in probably northeast KS as it looks now. We are leaving tonight for DSM. 

Synoptically, it looks like a really nice setup but the CAM's aren't really having it and seem to be really struggling with storm mode/morphology. 

The 18z NAM came in even stronger with the mid-level streak owing to even better bulk shear values coupled with big CAPE, dew points in the upper 60's, backed surface flow and very steep mid-level lapse rates. 

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Tomorrow should be interesting near the triple point and along any OFBs put out by the morning MCS. Vorticity rich environment should exist INVOF of the boundary, in addition to BL moisture pooling along it AND lapse rates in excess of 8.0C/KM resulting in explosive levels of instability. Still believe things get messy - as every CAM indicates - but also believe there will be a discrete/semi-discrete supercell or two for at least a couple hours along the front and near the triple point, in addition to transient supercell structures that will exist later on as storms congeal... QLCS potential will be quite high as well later on.

Something I have noted on NAM forecast soundings that has me a bit concerned is early in the afternoon (21z or so) when storms start to get going is that 0-1KM SRH is fairly underwhelming, while 0-3KM SRH is still relatively impressive, it is going to be hard to get tornadogenesis and sustained mesos with 1. Lots of storm interactions/messy modes, and 2. meager 0-1km SRH.

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Today went way better than expected. We were on the storm that sat over Quinter, KS from when it first broke the cap.  We about dumped it to drop back and it went nuts.  We sat back in one of the most amazing RFD clear slots I’ve ever seen.  It tried to tornado but bases were too high. We did get a landspout in the RFD though.

We had to bail south during a massive RFD surge to dodge the baseball sized hail. Overall the storm was awesome and vastly exceeded expectations.  Spending the night in Salina and back to chasing again tomorrow!

20C4AE9B-16F6-4367-999F-87A84CF27CB9.jpeg

E3956C9F-29A5-4B93-B640-351D73A54189.jpeg

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1 hour ago, CheeselandSkies said:

What an epic bust today was. Not sorry I bailed on chasing after looking at things this morning, although I still expected there to be widespread severe across NE KS/SE NE/SW IA/NW MO. Just a low chance of photogenic/tornadic storms. Not the complete lack of storms in the area.

I didn't chase either and I'm more or less local. 

Of course now there's a big hail-producing elevated thunderstorm in northern MO, at midnight, outside of the MRGL risk area. 

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11 hours ago, CheeselandSkies said:

What an epic bust today was. Not sorry I bailed on chasing after looking at things this morning, although I still expected there to be widespread severe across NE KS/SE NE/SW IA/NW MO. Just a low chance of photogenic/tornadic storms. Not the complete lack of storms in the area.

2018...everything that can go wrong, will go wrong. 

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Yesterday was completely underwhelming. The writing was on the wall with regard to storm mode, and models really busted pretty hard on where the boundary ended up setting up shop at.... but it still seemed probable that we would get at least one interesting tornadic storm, albeit I expected it to be HP and messy, or two along/south of the OFB (wherever it was supposed to setup)... And that really didn't pan out, hail-wise yesterday was even a bust.

Yesterday was very likely our last potentially semi-interesting day of May in the central and southern plains, and for the foreseeable future, perhaps some hints of moderate west/southwesterly mid-level flow at some point in the next few weeks, but no real definite/obvious signals. We currently sit at a remarkably sad amount of tornadoes for the year. RIP 2018 severe season.

Quote

TORNADO TOTALS AND RELATED DEATHS...THROUGH 11 MAY 2018
NWS STORM PREDICTION CENTER NORMAN OK
0339 PM CDT FRI MAY 11 2018

     ...NUMBER OF TORNADOES...       NUMBER OF       KILLER
                                     TORNADO DEATHS  TORNADOES
     ..2018..  2017 2016 2015   3YR              3YR             3YR
    PREL  ACT   ACT  ACT  ACT    AV   18 17 16 15 AV  18 17 16 15 AV
--- ---- ----  ---- ---- ---- -----   -- -- -- -- --  -- -- -- -- --
JAN   16   14   134   17   28    60    0 20  2  0  7   0  3  1  0  1
FEB   46  34^    68  102    3    58    2  5  7  0  4   2  4  4  0  3
MAR   62  18^   191   86   11    96    0  0  0  1  0   0  0  0  1  0
APR  146    -   211  141  171   174    1  8  1  2  4   1  5  1  1  2
MAY   52    -   287  216  381   295    0  2  2  7  4   0  2  2  5  3
JUN    -    -   143   86  184   138    -  0  0  0  0   -  0  0  0  0
JUL    -    -    80  107  115   101    -  0  0  0  0   -  0  0  0  0
AUG    -    -   114   90   45    83    -  0  0  0  0   -  0  0  0  0
SEP    -    -    34   38   17    30    -  0  0  0  0   -  0  0  0  0
OCT    -    -   85*   20   40   48*    -  0  0  0  0   -  0  0  0  0
NOV    -    -   46*   50   99   65*    -  0  6  0  2   -  0  2  0  1
DEC    -    -   13*   18   83   38*    -  0  0 26  9   -  0  0  6  2
--- ---- ---- ----- ---- ---- -----   -- -- -- -- --  -- -- -- -- --
SUM  322  66^ 1406*  971 1177 1186*    3 35 18 36 30   3 14 10 13 13

*PRELIMINARY REPORTS.
^PRELIMINARY VERSION OF ACTUAL COUNTS.

PREL = 2018 PRELIMINARY COUNT FROM ALL NWS LOCAL STORM REPORTS.
ACT  = ACTUAL TORNADO COUNT BASED ON NWS STORM DATA SUBMISSIONS.

 

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Well, it's a nasty series of bow echoes/possible tornado outbreak for much of SD/ND/MN Thursday if you believe the 3K NAM. Although, I saw its 48-36 hour sim reflectivity for Saturday over SW IA/NE KS and we all know how that turned out.

Shear parameters look pretty marginal across the area on the regular NAM, with only isolated pockets of higher EHI/STP. Not sure what to make of those, except maybe contamination? CAPE should be plentiful, and forecast lapse rates are decent.

The question is, am I that desperate for a chase?

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Literally every single storm in southern Kansas has a hook right now. None with strong rotation yet, but that'll probably come as storms and wind fields mature. Feel like the Clark Co./Comanche Co. KS storm is going to be a beast eventually... its currently starting to develop some rotation.

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The National Weather Service in Dodge City has issued a

* Tornado Warning for...
  Northwestern Ford County in southwestern Kansas...
  East central Gray County in southwestern Kansas...

* Until 530 PM CDT
    
* At 443 PM CDT, a severe thunderstorm capable of producing a tornado
  was located 3 miles northwest of Ensign, moving northeast at 15
  mph.

  HAZARD...Tornado and tennis ball size hail. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Ensign around 450 PM CDT. 
  Howell around 515 PM CDT. 
 

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TOR in progress west of DDC.

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHWESTERN FORD AND EAST CENTRAL GRAY COUNTIES...
    
At 448 PM CDT, a confirmed tornado was located near Ensign, moving
east at 25 mph.

HAZARD...Damaging tornado and tennis ball size hail. 

SOURCE...Emergency management confirmed tornado. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This tornado will be near...
  Howell around 505 PM CDT. 

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I think the cell crashing in from the south killed that one, but the KS/OK border rider now looks quite interesting...

By far the most impressive radar signatures seen in the Plains states all spring today. Excuse me while I beat my head against my desk (again) for taking last week off instead of this one.

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Its nearly midnight... and this tornadic storm is producing baseball sized hail

 

Severe Weather Statement
National Weather Service Norman OK
1140 PM CDT WED MAY 30 2018

OKC151-310500-
/O.CON.KOUN.TO.W.0024.000000T0000Z-180531T0500Z/
Woods OK-
1140 PM CDT WED MAY 30 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL MIDNIGHT CDT FOR EAST
CENTRAL WOODS COUNTY...

At 1140 PM CDT, a severe thunderstorm capable of producing a tornado
was located 6 miles southwest of Dacoma, moving east at 40 mph.

HAZARD...Tornado and baseball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without
         shelter. Mobile homes will be damaged or destroyed. Damage
         to roofs, windows, and vehicles will occur.  Tree damage is
         likely.

Locations impacted include...
Dacoma, Avard and Hopeton.
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27 minutes ago, yoda said:

So yeah... that STW from OUN... 90mph winds and tennis ball sized hail... um, I'd be hiding in the basement

 

BULLETIN - IMMEDIATE BROADCAST REQUESTED  
SEVERE THUNDERSTORM WARNING  
NATIONAL WEATHER SERVICE NORMAN OK  
1122 PM CDT WED MAY 30 2018  
  
THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A  
  
* SEVERE THUNDERSTORM WARNING FOR...  
  NORTHWESTERN KINGFISHER COUNTY IN CENTRAL OKLAHOMA...  
  ELLIS COUNTY IN NORTHWESTERN OKLAHOMA...  
  SOUTHEASTERN WOODS COUNTY IN NORTHWESTERN OKLAHOMA...  
  NORTHEASTERN ROGER MILLS COUNTY IN WESTERN OKLAHOMA...  
  SOUTHERN ALFALFA COUNTY IN NORTHWESTERN OKLAHOMA...  
  NORTHERN CUSTER COUNTY IN WESTERN OKLAHOMA...  
  NORTHERN BLAINE COUNTY IN NORTHWESTERN OKLAHOMA...  
  DEWEY COUNTY IN NORTHWESTERN OKLAHOMA...  
  SOUTHERN WOODWARD COUNTY IN NORTHWESTERN OKLAHOMA...  
  MAJOR COUNTY IN NORTHWESTERN OKLAHOMA...  
  
* UNTIL MIDNIGHT CDT  
  
* AT 1121 PM CDT, SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE  
  EXTENDING FROM NEAR WAYNOKA TO 4 MILES NORTH OF CHESTER TO 4 MILES  
  NORTHWEST OF MOOREWOOD, MOVING EAST AT 45 MPH.  
  
  THESE ARE VERY DANGEROUS STORMS.   
  
  HAZARD...90 MPH WIND GUSTS AND TENNIS BALL SIZE HAIL.   
  
  SOURCE...RADAR INDICATED.   
  
  IMPACT...YOU ARE IN A LIFE-THREATENING SITUATION. FLYING DEBRIS   
           MAY BE DEADLY TO THOSE CAUGHT WITHOUT SHELTER. MOBILE   
           HOMES WILL BE HEAVILY DAMAGED OR DESTROYED. HOMES AND   
           BUSINESSES WILL HAVE SUBSTANTIAL ROOF AND WINDOW DAMAGE.   
           EXPECT EXTENSIVE TREE DAMAGE AND POWER OUTAGES.   
  
* LOCATIONS IMPACTED INCLUDE...  
  FAIRVIEW, SHATTUCK, ARNETT, TALOGA, HELENA, OKEENE, THOMAS,  
  WAYNOKA, SEILING, VICI, CANTON, RINGWOOD, GAGE, LEEDEY, CUSTER  
  CITY, CARMEN, CLEO SPRINGS, LONGDALE, GOLTRY AND AMES.  
  
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
  
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A  
BUILDING.  
  
THIS IS AN EXTREMELY DANGEROUS SITUATION WITH TORNADO LIKE WIND  
SPEEDS EXPECTED. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE  
ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS MAGNITUDE AND MAY BE  
OVERTURNED. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE  
LOWEST FLOOR OF A BUILDING. THESE STORMS HAVE THE POTENTIAL TO CAUSE  
SERIOUS INJURY AND SIGNIFICANT PROPERTY DAMAGE.  

 

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BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
1156 PM CDT WED MAY 30 2018

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Kingfisher County in central Oklahoma...
  Eastern Woods County in northwestern Oklahoma...
  Northeastern Roger Mills County in western Oklahoma...
  Alfalfa County in northwestern Oklahoma...
  Custer County in western Oklahoma...
  Blaine County in northwestern Oklahoma...
  Grant County in northern Oklahoma...
  Northwestern Logan County in central Oklahoma...
  Dewey County in northwestern Oklahoma...
  Northwestern Canadian County in central Oklahoma...
  Southeastern Woodward County in northwestern Oklahoma...
  Northwestern Kay County in northern Oklahoma...
  Southern Ellis County in northwestern Oklahoma...
  Garfield County in northern Oklahoma...
  Major County in northwestern Oklahoma...

* Until 100 AM CDT

* At 1155 PM CDT, severe thunderstorms were located along a line
  extending from 5 miles northwest of Helena to 4 miles south of
  Fairview to 7 miles west of Putnam to 5 miles north of Roll, moving
  east at 45 mph.

  These are very dangerous storms.

  HAZARD...80 mph wind gusts and two inch hail. The strongest wind
           is moving toward Fairview and Helena. The largest hail is
           moving toward Leedy and Camargo.

  SOURCE...Radar indicated.

  IMPACT...Flying debris will be dangerous to those caught without
           shelter. Mobile homes will be heavily damaged. Expect
           considerable damage to roofs, windows, and vehicles.
           Extensive tree damage and power outages are likely.

* Locations impacted include...
  Enid, Watonga, Alva, Kingfisher, Fairview, Cherokee, Medford,
  Arnett, Taloga, Hennessey, Helena, Waukomis, Okeene, Thomas,
  Waynoka, Seiling, Pond Creek, Garber, Arapaho and Canton.
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Never doubt the High Plains! @Chinook do you think the Bighorns set off those storms, or was it the high terrain closer to Devil's Tower? I was not paying attention on a Friday afternoon sitting in Dixie, lol!

Earlier this week the Laramie range set off storms that lead to that gorgeous tornado I think on Sunday. Monday was the CO landspout party? At any rate those terrain features can help chasers with decisions. Everybody knows the Palmer Divide / DCVZ; however, many other gems are there to help up the High Plains.

UPDATE: Thanks Chinook! Looked back at Gillette tornado, between Bighorns and Devil's Tower. Looks like a good upslope into the Bighorns complete with SSE facing valley. I'll make a note of that!

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The first tornado near Cheyenne last week, was in fact on some lonely hilltop at 7900 ft in the foothills section between Cheyenne and Laramie. I'm sure the terrain helped concentrate some of the convergence, leading to the storm producing more tornadoes north of Cheyenne, in flatter terrain. (see my post about this in the Mountain West thread if you want to see the radar image of the first tornado)

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