Severe weather and heavy rain once again crossed through the lower Missouri River Valley region during the daytime hours of May 12th, with precipitation continuing all the way into the daytime hours of May 13th.    Numerous impacts were felt in the region, with heavy rain, wind damage, and hail the main impacts.   NOTE: The animated .gif below is a small snapshot of this heavy rain event with 30 minute intervals of precipitation and warnings.  Not all warnings that were issues may be represented in the image due to timing of the frames.

 

   

The most severe weather took place in portions of eastern Kansas and western Missouri as a strong bow echo moved through the area near and just after the midnight hour.  Embedded in this "bow echo" were small features called "meso-vortices" which can often times cause local intensifications of the strong straightline winds or even produce weak spinnup tornadoes in these thunderstorm complexes.  One such feature embedded in a smaller bowing storm segment south of the Plattsburg area, led to reports of a damaged greenhouse, numerous tree damage, as well as damage to other nearby structures.  It was determined that a combination of enhanced straight line winds as well as a very brief and weak tornado (EF0) produced winds as high as 70 to 85 mph in this area.  Further to the south, strong straight line winds also blew over trees and caused other forms of property damage to fences and homes in areas near the Kansas Speedway, Shawnee, Olathe, and Overland Park.  Several observations of 60 to 70 mph winds were observed in the area, perhaps even locally higher.

Report Time Location Event Type Mag.
5/12/10 5:56 3 Ne Bunceton HAIL 0.88
5/12/10 8:12 Edgerton HAIL 1.25
5/12/10 8:40 5 W Buckner HAIL 1.00
5/12/10 9:06 Oak Grove HAIL 0.88
5/12/10 9:46 Gower HAIL 1.25
5/12/10 9:48 Gower HAIL 1.00
5/12/10 22:45 2 Ne Merriam HAIL 0.75
5/12/10 22:53 Pattonsburg HAIL 0.50
5/13/10 0:20 De Soto HAIL 1.75
5/13/10 0:25 Bonner Springs HAIL 0.75
5/13/10 0:30 4 Nne Bonner Springs HAIL 1.00
5/13/10 0:30 Triplett HAIL 0.75
5/13/10 0:39 3 Wsw Weatherby Lake HAIL 0.88
5/13/10 0:43 De Soto HAIL 0.75
5/13/10 0:46 1 S Kci Airport HAIL 0.75
5/13/10 0:48 1 Ne Weatherby HAIL 0.88
5/13/10 0:55 North Kansas City HAIL 0.88
5/13/10 1:18 1 N Holt HAIL 0.75
5/13/10 1:34 N Missouri City HAIL 1.00
5/13/10 1:41 3 E Lawson HAIL 1.75
5/13/10 1:44 1 E Lake Waukomis FLOOD 0.00
5/13/10 2:10 Brashear HAIL 0.88
5/13/10 2:11 4 E Atlanta FLASH FLOOD 0.00
5/13/10 2:13 Cowgill HAIL 0.75
5/13/10 2:13 1 E Cowgill FLASH FLOOD 0.00
5/13/10 2:19 Polo FLASH FLOOD 0.00
5/13/10 2:45 Meadville HAIL 0.75
5/13/10 3:05 2 S Weatherby Lake FLASH FLOOD 0.00
5/13/10 3:25 Chillicothe FLASH FLOOD 0.00
5/13/10 3:41 2 Nw Chillicothe HEAVY RAIN 2.10
5/13/10 3:55 12 Ene Kingston FLASH FLOOD 0.00
5/13/10 4:08 Meadville FLASH FLOOD 0.00
5/13/10 4:18 Gardner TSTM WND DMG 0.00
5/13/10 4:23 De Soto TSTM WND DMG 0.00
5/13/10 4:23 De Soto TSTM WND GST 64.00
5/13/10 4:23 6 Sw Bonner Springs TSTM WND GST 60.00
5/13/10 4:25 1 Se Olathe TSTM WND DMG 0.00
5/13/10 4:25 Shawnee TSTM WND DMG 0.00
5/13/10 4:26 1 W Shawnee TSTM WND GST 70.00
5/13/10 4:26 1 W Shawnee TSTM WND GST 70.00
5/13/10 4:28 5 W Kansas City Ks TSTM WND GST 60.00
5/13/10 4:28 5 W Kansas City Ks TSTM WND GST 60.00
5/13/10 4:30 8 Nw Leavenworth TSTM WND DMG 0.00
5/13/10 4:30 7 Nne Bonner Springs TSTM WND GST 62.00
5/13/10 4:30 7 Nne Bonner Springs TSTM WND GST 62.00
5/13/10 4:45 2 W Independence TSTM WND DMG 0.00
5/13/10 4:52 4 S Plattsburg TSTM WND DMG 0.00
5/13/10 5:01 Blue Springs TSTM WND GST 65.00
5/13/10 5:25 Basehor HAIL 1.00
5/13/10 5:48 Trenton TSTM WND GST 70.00
5/13/10 5:48 Trenton TSTM WND GST 70.00
5/13/10 5:48 Trenton TSTM WND DMG 0.00
5/13/10 6:45 Paola HAIL 0.75
Storm Reports (click on the image for a larger version)  

 

However, the biggest impact from this event was the persistent heavy rain due in part to the continual "training" of storms over the same areas.  The hardest hit areas were in the Kirksville and Chillicothe areas where rainfall totals in the 3 to 6 inch range were common.  Elsewhere, while rainfall amounts may have been lower, the rapid rainfall rates in excess of 2" per hour caused localized flash flooding in portions of the Kansas City Metro and elsewhere. The images below only represent heavy rainfall which occurred from May 12 to May 13th.  Additional rainfall upward of 1 to 3 inches had fallen in portions of central Missouri on May 11th.

Rainfall May 12, 2010 Rainfall May 12, 2010


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