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7/12/2004 NOW: Northern Plains / USA

Dan Robinson

Thread started in response to apparent severe weather in progress in the Dakotas.
 
Highlights so far:

Nebraska:
2.75 inch hail, which is baseball size in Boyd County.

North Dakota:
80 mph wind gust in Rolette County

South Dakota
2.50 inch hail which is tennis ball size in Charles Mix Counties

Mike
http://mgweather.com
 
I headed out towards the TORN-warned storm towards SC South Dakota and NC Nebraska, but saw nothing to warrant further attention on my way down, the cell was appearing to become outflow dominated, so I'm back at the house waiting for the next cell (looking at mesoanalysis page there should be some) to pop up to chase.
 
Alright, looks like some towers are going up in the Sioxu Falls area, some are getting pretty high, looks like the cap is starting to break. Looking at some graphics supports this, so i'm going to head right back out again. I'll take my camera and give a full report when I return.
 
Really has been amazing watching that boundary move southeast and fire storms along it. Boundary is visible on sat and radar loops.
 
Alright, looks like some towers are going up in the Sioxu Falls area, some are getting pretty high, looks like the cap is starting to break. Looking at some graphics supports this, so i'm going to head right back out again. I'll take my camera and give a full report when I return.

Those towers, North of Sioux Falls look to be going up fast. The cell is now visible on radar. I might head west on I-90 when my dad gets home from work, and we'll try to see if this storm has what it takes to become severe



SCATTERED THUNDERSTORMS ARE EXPECTED TO START DEVELOPING ACROSS THE TRI STATE AREA DURING DINNERTIME. THE DEVELOPMENT IS EXPECTED TO BE FAIRLY RAPID..


First Post In Target Area
 
Storms in NE

Currently there is a group of storms moving into NE this evening, including a good sized supercell that has just been TORN warned:

NATIONAL WEATHER SERVICE NORTH PLATTE NE
618 PM CDT MON JUL 12 2004

THE NATIONAL WEATHER SERVICE IN NORTH PLATTE HAS ISSUED A
TORNADO WARNING FOR HOLT COUNTY IN NORTH CENTRAL NEBRASKA
UNTIL 700 PM CDT

AT 612 PM CDT, NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 9 MILES NORTH OF
CHAMBERS, OR ABOUT 10 MILES SOUTH OF O'NEILL, MOVING SOUTH
AT 15 MPH. THE TORNADO IS EXPECTED TO BE NEAR CHAMBERS AROUND 640 PM CDT.

I will keep track of these storms as they may threaten the Lincoln/Omaha metro areas by this evening.
 
Tornado Hook??

Been looking at the base reflectivity of NWS radar out of Omaha. I see the supercell which is just south of O'Neill NE that's showing a nice hook signature. I believe this cell is still under a TORN warning.

http://www.crh.noaa.gov/radar/loop/DS.p19r...0/si.koax.shtml

Update: Just looked at North Platte NWS radar. It looks like the supercell may actually be trying to extend itself along that nice boundary that's showing up on radar:

http://www.crh.noaa.gov/radar/loop/DS.p19r...0/si.klnx.shtml

4c50e0f48e88a19f775654d4d43914c6.gif
 
Severe thunderstorm North West of Sioux Falls

AT 634 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL

Looks like my dad and I gonna be going down I-90 in the next 10 minutes or so
 
Supercell after Sunset??

Should be interesting to see what happens to the supercell south of O'Neill NE based on what the NWS said in its MSC discussion:

ACTIVITY ACROSS THIS AREA SHOULD BE RELATIVELY SHORT LIVED DUE TO STRONG CAP, WHICH WILL STRENGTHEN FURTHER WITH ONSET OF RADIATIONAL COOLING AROUND SUNSET.

Sunset in our NE location is at 08:58 CDT. Wait and See!!

fa5d44586846507da00834cd9113510a.gif
 
Tornadoes being reported out of the Nebraska supercell:

-0730 pm Tornado 2 W Barlett in Wheeler County by Storm Chasers
Tornado on ground.
-0713 pm Tornado 7 N Barlett in Wheeler County by Trained Spotter.
-0710 PM Tornado S Chambers in Holt County by Trained Spotter
2 Tornadoes reported near Foxly's Feed lot

Current Radar Loop:
http://mgweather.com/rad_0712_12lnx_ani_ani.gif

Radar Loop of this storm: From near the beginning to the current:

http://mgweather.com/rad_0712lnx_ani_ani.gif
http://mgweather.com/rad_0712_03lnx_ani.gif
http://mgweather.com/rad_0712_2lnx_ani_ani.gif
http://mgweather.com/rad_0712_06lnx_ani_ani.gif
http://mgweather.com/rad_0712_07lnx_ani_ani.gif
http://mgweather.com/rad_0712_08lnx_ani_ani.gif
http://mgweather.com/rad_0712_10lnx_ani_ani.gif
http://mgweather.com/rad_0712_11lnx_ani_ani.gif

Satellite Image of this storm:
http://mgweather.com/OLU_SAT2.gif

Mike
http://mgweather.com
 
I am sick to my stomache.. I didnt think this thing would hold together..

<I'm gonna go cry now>
 
I feel your pain Melissa. Is it me or is this supercell a monster?
Randy Chamberlain and I just had a long discussion on if we should go out after it or not. I am so sick to my stomache watching this thing on radar. I'd be long gone if it hadnt turned south with only 1.5 hours of good daylight left. Even at 15mph its not catchable.

I thought this would die as did a few others in this area but nooooooooo.... MikeH brings back sick pics of a sweet structure and/or a tor and I am going to hate myself for a long time for not going after this one... (and we all know Mike is gonna bring back sweeeeet pics)
 
Boundary feeding

That NE supercell is still heading south, 25 miles east of Burwell, and still holding its shape, size and speed. From the North Platte radar you can easily see how its feeding on a boundary as it heads south. That boundary extends SW past Broken Bow and all the way to North Platte. However, the boundary appears to be shrinking due to the supercell's feeding. Much like a fat robin slurping a thin worm up.

We will see what happens at sunset, which will come at 8:57 p.m. CDT.

ca48dbdf4f06881a44b09fa06c887250.gif
 
Sweet mother of God, would you look at the VIL on that thing? Solid 75+ spike for like 20 miles! Hope Mike has the Mustang insured! :shock:

-Ryan
 
Sweet mother of God, would you look at the VIL on that thing? Solid 75+dbz for like 20 miles! Hope Mike has the Mustang insured! :shock:

-Ryan
Mike is in Ord NE and reports 2 tornadoes so far including one wedge... <sobbing>
 
Heh. Glad I checked the wx sites -- I saw some cirrus tops blowing over Lincoln here and wondered what was going on. I would have never imagined those cirrus came from Ord. This storm reminds me on radar of the monster out by Aurora last year that dropped the world record hail ball. Were it not for the Hallam monster, I'd say this is an easy shoe-in for best Nebraskan storm this year. I guess those who made it out to see the storm will let us know how it fared.

-Ryan
 
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