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Paul Sherman

Chase Day 23 - SD/NE/KS

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Hail damage Plainview, NE. 

 

Astonishing damage.. horizontal hail...

post-7292-0-17709300-1401830579_thumb.jp

 

View from NWS Omaha

post-7292-0-59484500-1401830767_thumb.jp

 

Instagram feed of storm rolling in, looks menacing.

 

http://instagram.com/p/oy_2iYRduy/

Edited by lorenzo
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Really strong couplet to the NW of Ord and north of the team. Are there any tornado reports yet?

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Not read of Tornado reports yet, Tornado warnings started rolling out in the last 15 minutes.

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Textbook and rattling through at some pace..

post-7292-0-67571400-1401831532_thumb.pn

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Tornado confirmed 8 miles N of Ord, on Ed's couplet mentioned a couple of posts ago.

 

What a shot this is of the storm rolling into Omaha. Hollywood stuff.

post-7292-0-80970000-1401832002_thumb.jp

 

Edited by lorenzo

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Amazing bow echo, wind and hail downtown Omaha. Wow.

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www.ketv.com showing footage of hail and wind, really wouldn't want to be out in that...

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Normally see supercells line out - unusual to see the bow echo convert to a tornado warned supercell.

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struggling to get the teams stream to start,

nick dreichsman seems to be in the sweet spot.

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What a mess. A range of modes present - the cell near Silver Creek has a shelf, SLWs, gustnados and strong rotation all in one it seems! 

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The new cell south of Alliance in W NE may save the day if it stays along the boundary as it moves ESE.Already has a strong couplet on it but if it survives it will be a couple of hours before it reaches the team's location.

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Dusk falls on the high plains and that's me done. I have no idea what went 'wrong' this evening - it seems the complex interaction of WF and various boundaries prevented cells from riding the better shear and thus far the train of cells have been a clutter of shelf clouds and occasional rotation.I was pretty confident of several large tornados by now - even the modelled derecho event seems to have dematerialised.Back to the drawing board for Weds night LOL. 

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This has the signature of a sliding cold front with winds generally east to northeast to the north of the frontal boundary. The frontal boundary may however remain quite active and will move gradually to the south all night to reach central Kansas to northern Missouri by morning. Would not be surprised if a tornado develops after nightfall in southeast Nebraska or around Concordia KS to St Joseph MO. Potential for major flooding rainfalls in the Omaha to Des Moines region. Would suggest eastern KS around Ottawa KS might be a good target for tomorrow afternoon.

 

BTW for derecho potential I think there would need to be at least double today's upper level wind speed values as well as some shear at altitude, the sliding cold front pattern can however form a line squall (or squall line if you prefer) or more likely a meso-scale convective cluster. This one might do that around 11 p.m. to midnight local time (I think it's 8:30 pm CDT in Nebraska now).

 

 

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The major storms may not have played ball, but what a sunset after taking a bit of hail.

post-1056-0-26985600-1401848721_thumb.jp

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Roger, I think that we lost the anvil level winds...

 

We were in Broken bow and was on the first radar blip but we were then pulled over by the police! We were just over the speed limit and let off with a warning - however 20 munities had passed so we were behind the storm.

 

skip forward many hours and we were investigating the then tornado warned tail end cell south of  Loop city, NW (09:00pm). Impressive structure and at 09:30pm we observed a 2 minute tornado south of Farwell.

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RECORD EVENT REPORT (refers to 3 June)
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
144 AM CDT WED JUN 4 2014

...RECORD RAINFALL AMOUNT AT OMAHA EPPLEY AIRFIELD IN OMAHA
NEBRASKA...

A RECORD DIALY RAINFALL AMOUNT OF 5.30 INCHES WAS SET AT OMAHA
EPPLEY AIRFIELD YESTERDAY. THIS BREAKS THE OLD RECORD AMOUNT OF
1.85 INCHES FROM 1890.

IT ALSO BREAKS THE MONTHLY RECORD OF RAINFALL FOR ANY DAY IN JUNE
FOR THE LOCATION. THE PREVIOUS RECORD WAS 5.02 INCHES FROM JUNE 17
1875.

 

-- so in other words, the wettest June day in about 150 years of data for Omaha.

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A closer inspection reveals how near and yet so far last night's event was. It looks like an OFB in the form of a pseudo cold front developed just to the north of the synoptic warm front. Rather elevated cells developing on the first boundary just failed to dip into the richer moisture and shear associated with the southern WF and remained the dominant structure as they moved along the boundary ESE.Nothing of note managed to take hold in the better environment along the I80. Many chasers, including several DOWs and all four Dominator crews more or less busted out. 

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