Multi-day outbreak of May 25-31

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TwisterFanatic
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#141 Postby TwisterFanatic » Thu May 30, 2013 4:26 pm

If the storms hold together, one or two will have a chance to drop a large tornado this evening as the LLJ kicks in.
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#142 Postby EF-5bigj » Thu May 30, 2013 4:29 pm

It's not even prime time yet when the LLJ does kick in the storms should get more intense.
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Re: Multi-day outbreak for most of this week

#143 Postby Cyclenall » Thu May 30, 2013 5:26 pm

In this shot a storm forms right on top of Moore OK but it isn't there anymore:

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Duel supercells are beside each other down way east of Lawton OK, like conjoined twins. They are/were both tornado warned.
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#144 Postby wx247 » Thu May 30, 2013 5:43 pm

Surprised Tulsa hasn't pulled a Tornado Warning on the cell NE of town near Langley.
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Uh-Oh

#145 Postby Cyclenall » Thu May 30, 2013 5:59 pm

Umm...is this a derecho forming in western IL???

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Holy crap!!
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#146 Postby RL3AO » Thu May 30, 2013 6:01 pm

Worth watching. SPC issued a SVR watch for Chicagoland area.
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Re: Multi-day outbreak for most of this week

#147 Postby Hurricaneman » Thu May 30, 2013 6:05 pm

Looking at the KFOR chopper pics, that storm near Guthrie should be warned for Tornadoes especially with that wall cloud
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Re:

#148 Postby Cyclenall » Thu May 30, 2013 6:39 pm

RL3AO wrote:Worth watching. SPC issued a SVR watch for Chicagoland area.

So what's your take on it? Is it just a severe squall line or a derecho in the making? At first I didn't think much of it but when it started bowing hugely and then picked up speed suddenly, and strengthening at the bow it reminded me of one. Major wind reports are also suddenly coming from that area that is significant.
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#149 Postby RL3AO » Thu May 30, 2013 7:16 pm

Its falling apart on the southern end. Milwaukee might get a good jolt out of it though. Might be interesting to see if it holds together over Lake Michigan.
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#150 Postby WeatherGuesser » Thu May 30, 2013 7:30 pm

13 Flash Flood Warnings in effect.

Gauges along the Mississippi forecast to go to Moderate or Major flood stages by next week:

http://water.weather.gov/ahps2/index.php?wfo=pah
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#151 Postby RL3AO » Thu May 30, 2013 8:12 pm

Keep your eye on the tornado warned cell moving towards Little Rock.
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#152 Postby EF-5bigj » Thu May 30, 2013 8:57 pm

That storm near Brocken Arrow,OK is impressive.
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#153 Postby TwisterFanatic » Thu May 30, 2013 9:39 pm

Broken Arrow storm produced a large cone that cause damage in Broken Arrow.
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#154 Postby Texas Snowman » Thu May 30, 2013 11:27 pm

How severe is the damage in Broken Arrow?
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Re:

#155 Postby Ntxw » Thu May 30, 2013 11:31 pm

Texas Snowman wrote:How severe is the damage in Broken Arrow?


Some images from the weather channel Mike Bettes looks like EF1 or less. Roofs, panels, signs etc damaged.
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#156 Postby TwisterFanatic » Fri May 31, 2013 12:47 am

Local news showed some pictures of homes that was had major damaged, probably EF2 damage.
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#157 Postby TwisterFanatic » Fri May 31, 2013 12:49 am

Tomorrow will be interesting to see how it evolves, extreme instability forecast by the RAP(CAPE approaching 6000 in North Oklahoma)
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#158 Postby TwisterFanatic » Fri May 31, 2013 1:04 am

Initial Day 1 Outlook has a 15% hatched area for Tornadoes, stretching from about Fort Sill, OK to about Miami, Oklahoma.

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#159 Postby wx247 » Fri May 31, 2013 5:45 am

Generally speaking it usually appears to me as if the initial Day One Outlook is usually pretty conservative. If that is the case, then it will be interesting to see what they do during the update that should be out in the next couple of hours. Meanwhile, the NWS offices in TSA and OKC are really hitting the threat hard for their region. Tulsa's Decision Support Page has some extremely high probabilities and the graphic below is from OKC's office.

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#160 Postby Ntxw » Fri May 31, 2013 9:36 am

Low level shear/wind profiles aren't that great over Oklahoma and adjacent areas today. Models aren't bullish with storms firing there either. If I had to pick a region it would be Ohio valley and mid Miss to continue the gradual eastward shift since Monday.

Sweeping cold front will be coming through southern plains later tonight and tomorrow which could bring an additional linear mode of storms.
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