Multiple Microbursts August 10-11

Multiple Microbursts Cause Damage Across Northeastern Kansas

The afternoons of August 10th and 11th 2010 brought many short-lived thunderstorms to portions of northeastern Kansas.  Although these storms were short-lived, when they collapsed they produced strong gusts of wind which caused damage to numerous trees and structures. 

On Tuesday August 10th, Pottawatomie County Emergency Manager was taking shelter from the storms in one of the the structures damaged by 70 to 80 mph winds when the roof was blown away (pictured below).  Near Louisville, 6 powerpoles were damaged or broken by the strong winds. Aside from the damage in Pottawatomie County, trained spotters throughout  the area reported 60 to 70 mph winds from these short bursts of wind.

On Wednesday August 11th, another round of thunderstorms kicked off in the mid afternoon.  More tree and powerpole damage was reported in downtown Lawrence.  A telephone pole was snapped near the Coffey County Airport and broken tree limbs did vehicle damage in Burlington. 

Velocity         Reflectivity

In the above animations (Click for larger images), two microbursts are evident near the city of Dwight in northeast Morris County.  The velocity image (left) captures the downbursts, which are depicted by the winds moving toward the radar (bright green colors) and winds moving away from the radar (red colors to the southwest of the bright green).  The reflectivity animation (right) shows that there were indeed two rather weak thunderstorms in the same location.  These storms collapsed upon themselves, causing the microbursts. 

Microbursts can be very destructive, causing winds as high as 80 to 90 mph. They are named "microbursts" due to the fact that the strongest effects of this phenomenon are typically only felt within a few miles of the storm. 

Photos from August 10th and 11th.

A mobile home is damaged near Wamego

Above:  A mobile home is damaged near Wamego, KS

 

A barn is damaged near Hwy 99 near Wamego

Above:  A barn is damaged along Hwy 99, 8 miles north of Wamego.

 

 Tree Damage on 15th Street in Lawrence

Above:  A tree branch falls on a fence near downtown Lawrence.

 

Tree Damage in Lawrence

Above:  Many tree branches near downtown Lawrence were snapped when high winds ripped through the city.

 

View all of the LSRs from August 10th and 11th on an interactive map.

 

Local Storm Reports from August 10th to August 11th 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

0755 PM TSTM WND GST 5 WNW LOUISVILLE 39.29N 96.40W
08/10/2010 E60.00 MPH POTTAWATOMIE KS PUBLIC

PEA HAIL FELL FOR ABOUT 10 MINUTES.

0813 PM TSTM WND DMG 3 N LOUISVILLE 39.29N 96.31W
08/10/2010 POTTAWATOMIE KS LAW ENFORCEMENT

6 POWERPOLES DAMAGED OR BROKEN NEAR LANDFILL ALONG
WHEATON ROAD 3 MILES NORTH OF LOUISVILLE.

0815 PM TSTM WND DMG 4 ENE WAMEGO 39.22N 96.24W
08/10/2010 POTTAWATOMIE KS DEPT OF HIGHWAYS

30-40 PERCENT OF ROOF TORN OFF BARN STYLE METAL SHED
LOCATED NEAR HWY 24 AND ONAGA RD. TIME ESTIMATED.

0816 PM TSTM WND GST 3 WNW WAMEGO 39.21N 96.37W
08/10/2010 E60.00 MPH POTTAWATOMIE KS TRAINED SPOTTER

0842 PM TSTM WND GST SSE ALMA 39.01N 96.29W
08/10/2010 E60.00 MPH WABAUNSEE KS TRAINED SPOTTER

1-2 INCH TREE LIMBS BLOWN DOWN.

0844 PM TSTM WND GST 2 S ALMA 38.98N 96.28W
08/10/2010 E60.00 MPH WABAUNSEE KS TRAINED SPOTTER

LASTED APPROXIMATELY 10 MINUTES.

0900 PM TSTM WND GST 1 NE SILVER LAKE 39.12N 95.84W
08/10/2010 E60.00 MPH SHAWNEE KS TRAINED SPOTTER

SMALL TREE LIMBS DOWN.

0437 PM TSTM WND GST 1 NW OSAGE CITY 38.64N 95.84W
08/11/2010 E70.00 MPH OSAGE KS TRAINED SPOTTER

0445 PM TSTM WND GST 1 E OSAGE CITY 38.63N 95.81W
08/11/2010 E70.00 MPH OSAGE KS PUBLIC

SMALL TREE LIMBS DOWN.

0509 PM TSTM WND GST 6 SSE LAWRENCE 38.89N 95.21W
08/11/2010 E60.00 MPH DOUGLAS KS TRAINED SPOTTER

DIME SIZE HAIL ALSO REPORTED

0514 PM TSTM WND GST ALTA VISTA 38.86N 96.49W
08/11/2010 E60.00 MPH WABAUNSEE KS TRAINED SPOTTER

METAL FLAG POLE WAS PUSHED OVER.

0529 PM TSTM WND DMG LAWRENCE 38.96N 95.26W
08/11/2010 DOUGLAS KS EMERGENCY MNGR

1550 DELAWARE AND 1100 BLOCK OF E1500 RD POWER LINES
DOWN. 14TH AND MASS STREET AND 11TH AND CONN- POWER
OUTAGES REPORTED. POWER POLE AND LINES DOWN OVER N1100
ROAD.

0616 PM TSTM WND GST 4 NW LEBO 38.46N 95.90W
08/11/2010 E50.00 MPH OSAGE KS TRAINED SPOTTER

0619 PM HAIL 1 N ALMA 39.03N 96.29W
08/11/2010 E1.00 INCH WABAUNSEE KS TRAINED SPOTTER

40 MPH WIND ALSO REPORTED.

0702 PM TSTM WND DMG 8 N BURLINGTON 38.31N 95.74W
08/11/2010 COFFEY KS LAW ENFORCEMENT

POWER LINES AND POLES DOWN ALONG HIGHWAY 75 NEAR THE
AIRPORT. RADAR ESTIMATED TIME.

 



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