After an abnormally warm day where temperatures soared into the 80s and 90s, shattering record high temperatures in the region, a slow moving cold front combined with a very strong spring storm system to produce widespread damaging thunderstorms late Sunday afternoon and Sunday evening.  For more information on the record high temperatures in the area please visit the Temperature Summary page.
 

 
Water Vapor Imagery 4/3/11 (Click on the Image for a Larger Version) Surface Map/Radar  (click on the image for a larger version) High Temperatures (click on the image for a larger version)

 

Supercellular thunderstorms developed along and ahead of a cold front sinking southward out of Iowa, Nebraska, and Kansas around 6 pm Sunday evening, rapidly becoming severe as they tracked eastward.  These thunderstorms produced extremely large hail greater than golf balls in many areas as well as damaging 60 to 80 mph winds.  The animated image below shows the progression of activity through the night.  At one point, a collection of six different supercell storms was indicated on regional radar reflectivity.  The third image found below is a 3D representation of a  supercell thunderstorm which produced massive hail from Olathe to Lees Summit between 9  and 10 pm.  The shades of colors represent different levels of reflectivity, with light green to yellow shading indicating reflectivity values between 30 and 50 dbz, red shading represents higher reflectivity values greater than 50 dbz and finally  bright pink shades of color indicate the highest reflectivity greater than 60 dbz (indicative of large hail or droplets intercepting the radar beam).  This massive thunderstorm indicated a storm top (highest level of indicated reflectivity - green shading) approaching 60,000 ft AGL with extreme reflectivity values shaded as pink  as high as 40,000 ft AGL!  

 
Local Radar Loop (click on the image for a larger version)  Wind Damage Producing Bowing Supercell near Moberly 3D Image of Supercell Thunderstorm Over Olathe Producing Ping Pong Size Hail

 

Below you can find a preliminary map of the storm reports from the event. The hardest hit areas included the southern half of the Kansas City metro as well as many areas south of Interstate 70.   Late in the evening, strong straight line winds in excess of 70 mph produced significant damage in areas from Marshall, to Moberly and Fayette.

Preliminary Local Storm Report Map

LSR Map Thumbnail

Storm Reports Across the Region
Storm Reports Across the Kansas City Metro

 

 

Pictures of the Event:

 

Below are various photos the office had received from the public documenting the size of the hail that occurred with this activity. If you have pictures of your own you'd like to share, please email them to: w-eax.webmaster@noaa.gov Thanks to all spotters, local law enforcement agencies, media and members of the public who helped share their reports of severe weather through this event!

Various Pictures of Hail from the Region

Photo of hail stones in Lees Summit MO
   
     


Text Summary of Local Storm Reports:

Report Time County Location ST Event Type Mag.

Remark

Mon Apr 4 00:23   Putnam 7 Ne Unionville MO HAIL 1.5 hail up to the size of ping pong balls
Mon Apr 4 00:23   Putnam Unionville MO HAIL 1  
Mon Apr 4 00:34   Leavenworth 4 S Tonganoxie KS TSTM WND GST 50  
Mon Apr 4 00:34   Leavenworth 4 S Tonganoxie KS TSTM WND GST 50  
Mon Apr 4 00:34   Leavenworth Leavenworth KS HAIL 1 4 miles w of fort leavenworth
Mon Apr 4 00:46   Caldwell 5 Sw Kingston MO HAIL 0.75  
Mon Apr 4 00:48   Sullivan 5 S Milan MO HAIL 1  
Mon Apr 4 00:49   Leavenworth Lansing KS HAIL 1 dime to quarter size hail
Mon Apr 4 00:51   Atchison Atchison KS HAIL 0.75  
Mon Apr 4 00:52   Sullivan Milan MO HAIL 1 nickel to quarter sized hail also reported in green city
Mon Apr 4 00:53   Platte 4 S Camden Point MO NON-TSTM WND GST 70 dime size hail also reported
Mon Apr 4 00:53   Platte 4 S Camden Point MO NON-TSTM WND GST 70 dime size hail also reported
Mon Apr 4 00:53   Caldwell 5 S Hamilton MO HAIL 0.75  
Mon Apr 4 00:54   Sullivan Green City MO HAIL 1.5  
Mon Apr 4 00:55   Platte Platte City MO HAIL 1  
Mon Apr 4 00:55   Clay 2 N Gladstone MO HAIL 1  
Mon Apr 4 00:58   Schuyler Greentop MO HAIL 1  
Mon Apr 4 00:58   Platte Ferrelview MO HAIL 0.88  
Mon Apr 4 01:00 Clay Riverside MO TSTM WND GST 70 semi-truck overturned i-635 and highway 9
Mon Apr 4 01:00 Clay Riverside MO TSTM WND GST 70 semi-truck overturned i-635 and highway 9
Mon Apr 4 01:00 Buchanan 2 Ne Rushville MO HAIL 1.25 quarter to half dollar size hail.
Mon Apr 4 01:00  Platte Platte City MO HAIL 1 winds estimated at 50 mph.
Mon Apr 4 01:04   Leavenworth 1 S Basehor KS TSTM WND DMG 0 shingles off roofs of several homes. 14 inch diameter tree was 30 feet high and snapped off from trunk. metal shed 10 by 10 destroyed. near 153rd and briarwood
Mon Apr 4 01:06   Clay Gladstone MO TSTM WND GST 50  
Mon Apr 4 01:06   Clay Gladstone MO TSTM WND GST 50  
Mon Apr 4 01:07   Clay Gladstone MO HAIL 1 estimated 50 mph winds
Mon Apr 4 01:08   Holt 5 N Craig MO HAIL 1  
Mon Apr 4 01:11   Leavenworth S Basehor KS TSTM WND DMG 0 power outages in the area of 153rd and briarwood with debris in the power lines.
Mon Apr 4 01:11   Clay 3 Nw Liberty MO HAIL 1.5 up to ping pong ball size
Mon Apr 4 01:15   Clay Kearney MO HAIL 0.75  
Mon Apr 4 01:17   Clay Kearney MO HAIL 1.75  
Mon Apr 4 01:17   Clay Liberty MO HAIL 1.75 north of a hwy
Mon Apr 4 01:20   Clay Kearney MO HAIL 1  
Mon Apr 4 01:21   Clay Kearney MO HAIL 1.5  
Mon Apr 4 01:30   Nodaway 5 W Burlington Junction MO HAIL 0.88  
Mon Apr 4 01:40   Ray 5 N Richmond MO HAIL 1.5 near ray county lake
Mon Apr 4 01:41   Ray Richmond MO HAIL 1  
Mon Apr 4 01:41   Gentry 2 Nw Albany MO HAIL 1 estimated wind gust 50-55 mph
Mon Apr 4 01:41   Franklin Richmond KS HAIL 1  
Mon Apr 4 01:56   Johnson 2 N Olathe KS HAIL 1.25  
Mon Apr 4 01:59   Johnson Spring Hill KS HAIL 0.75 approximately one half mile west of 169 hwy.
Mon Apr 4 02:00 Johnson Gardner KS HAIL 1  
Mon Apr 4 02:04   Johnson 2 Ssw Olathe KS HAIL 1.75  
Mon Apr 4 02:05   Johnson Overland Park KS HAIL 1.75 near 159th and metcalf
Mon Apr 4 02:05   Grundy Sw Trenton MO HAIL 1.5  
Mon Apr 4 02:05   Carroll 10 Sw Carrollton MO FUNNEL CLOUD 0 siting of a funnel cloud just north of the missouri river north of waverly
Mon Apr 4 02:06   Johnson Olathe KS HAIL 1.5  
Mon Apr 4 02:10   Daviess 3 N Jameson MO HAIL 1.75  
Mon Apr 4 02:14   Jackson Grandview MO HAIL 1  
Mon Apr 4 02:15   Johnson 2 Ne Olathe KS HAIL 1.75 2 miles ne of ojc airport. roof damage reported.
Mon Apr 4 02:15   Cass S Raymore MO TSTM WND DMG 0 near 195th st and school rd. several power poles leaning. outbuildings being destroyed. barn blown down. a wooden powerpole split.
Mon Apr 4 02:15   Johnson Leawood KS HAIL 1.5  
Mon Apr 4 02:20   Jackson Kansas City MO HAIL 1.5 near 46th st and paseo
Mon Apr 4 02:21   Jackson Lees Summit MO HAIL 2.25 hail 2 to 2.25 inches near hwy 291 and hwy 150
Mon Apr 4 02:22   Jackson Lees Summit MO HAIL 1.75  
Mon Apr 4 02:25   Cass Lake Winnebago MO HAIL 3  
Mon Apr 4 02:25   Jackson Lees Summit MO HAIL 1.75  
Mon Apr 4 02:25   Jackson 2 S Lee'S Summit MO HAIL 2.5  
Mon Apr 4 02:26   Jackson 2 E Lee'S Summit MO HAIL 2.5  
Mon Apr 4 02:27   Jackson 1 S Greenwood MO HAIL 2.5  
Mon Apr 4 02:29   Cass Belton MO TSTM WND DMG 0 roof blown off trailer home in belton.
Mon Apr 4 02:29   Jackson Lees Summit MO HAIL 1.25  
Mon Apr 4 02:30   Cass 1 Ne Pleasant Hill MO TSTM WND DMG 0 very large trees down. numerous buildings damaged. in the vicinity of timber street. time estimated from radar.
Mon Apr 4 02:30   Jackson Greenwood MO HAIL 2.5  
Mon Apr 4 02:35   Jackson 3 E Blue Springs MO HAIL 1  
Mon Apr 4 02:35   Jackson Lees Summit MO HAIL 2  
Mon Apr 4 02:35   Jackson 3 Ne Blue Springs MO HAIL 0.88  
Mon Apr 4 02:39   Linn Parker KS HAIL 0.75  
Mon Apr 4 02:39   Jackson Lone Jack MO HAIL 1  
Mon Apr 4 02:40   Miami 3 S Osawatomie KS HAIL 1.25  
Mon Apr 4 02:45   Linn Parker KS HAIL 1  
Mon Apr 4 02:50   Linn La Cygne KS TSTM WND GST 70 60 to 70 mph gusts. 4 to 6 inch limbs down.
Mon Apr 4 02:50   Linn La Cygne KS TSTM WND GST 70 60 to 70 mph gusts. 4 to 6 inch limbs down.
Mon Apr 4 02:53   Cass 3 Nw Harrisonville MO HAIL 1  
Mon Apr 4 02:57   Johnson Kingsville MO TSTM WND DMG 0 nw 1871 rd roof blown off log style home.
Mon Apr 4 02:59   Lafayette Higginsville MO TSTM WND GST 59  
Mon Apr 4 02:59   Lafayette Higginsville MO TSTM WND GST 59  
Mon Apr 4 03:00 Johnson Pittsville MO TSTM WND DMG 0 powerlines down in town
Mon Apr 4 03:04   Lafayette Concordia MO TSTM WND DMG 0 5 foot diameter tree uprooted. numerous 1 foot diameter branches broken off of trees.
Mon Apr 4 03:18   Schuyler 3 S Lancaster MO HAIL 1  
Mon Apr 4 03:26   Carroll Carrollton MO TSTM WND GST 50  
Mon Apr 4 03:26   Carroll Carrollton MO TSTM WND GST 50  
Mon Apr 4 03:30   Saline 2 E Marshall MO TSTM WND DMG 0 tree blown onto car off lincoln ave. grain bin damaged. time estimated from radar.
Mon Apr 4 03:37   Saline Marshall MO TSTM WND GST 70  
Mon Apr 4 03:37   Saline Marshall MO TSTM WND GST 61  
Mon Apr 4 03:55   Howard Armstrong MO TSTM WND DMG 0 metal roof blown off of a house.
Mon Apr 4 04:10   Randolph Moberly MO TSTM WND DMG 0 tractor trailer blown over south of the city. roof blown off of a house on rt jj west of town.
Mon Apr 4 04:13   Randolph 2 W Clark MO TSTM WND GST 70  
Mon Apr 4 04:13   Randolph Clark MO TSTM WND GST 70  

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