Thunderstorms began to develop across the northwest and north central parts of Missouri during the early evening hours of June 14th. However, due to a layer of very warm air about 7,000 to 10,000 ft off the ground, these storms initially struggled to maintain intensity before sunset. Then, a wave of energy finally moved east into the area, eliminating this "cap" of warm air aloft and allowing thunderstorms to grow very rapidly. The storms intensified near the Chillicothe and Trenton areas, reaching their most intense stage in Linn and Macon counties, where tornadoes touched down over rural parts of these counties. Luckily, other than some downed trees and tree limbs, no other damage was reported from these touchdowns. Below is a radar loop from the Pleasant Hill radar showing the time frame when these thunderstorms were producing the tornadoes.

Radar loop June 14

A map of the severe reports from the evening of June 14th, along with the chronological time line is presented below.

LSR reports June 14

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
1136 PM CDT TUE JUN 14 2011

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

0840 PM     HAIL             6 SE TRENTON            40.02N 93.52W
06/14/2011  E1.00 INCH       GRUNDY             MO   PUBLIC

0852 PM     HAIL             FARMERSVILLE            39.96N 93.53W
06/14/2011  E0.88 INCH       LIVINGSTON         MO   PUBLIC

0941 PM     HAIL             4 N MEADVILLE           39.84N 93.30W
06/14/2011  E1.00 INCH       LINN               MO   TRAINED SPOTTER

            PEA TO QUARTER SIZED HAIL FOR 7-8 MINUTES

0950 PM     HAIL             6 N MEADVILLE           39.87N 93.30W
06/14/2011  E1.75 INCH       LINN               MO   PUBLIC

1004 PM     HAIL             UNIONVILLE              40.48N 93.00W
06/14/2011  E0.88 INCH       PUTNAM             MO   CO-OP OBSERVER

1039 PM     TORNADO          12 NNE BROOKFIELD       39.95N 92.99W
06/14/2011                   LINN               MO   AMATEUR RADIO

1045 PM     TORNADO          2 W NEW BOSTON          39.95N 92.92W
06/14/2011                   LINN               MO   STORM CHASER

            LARGE CONE SHAPED TORNADO ON THE GROUND

1053 PM     TSTM WND DMG     1 W NEW BOSTON          39.95N 92.90W
06/14/2011                   LINN               MO   FIRE DEPT/RESCUE

            SEVERAL TREES BLOCKING THE HIGHWAY 11

1058 PM     TORNADO          2 W GOLDSBERRY          39.96N 92.83W
06/14/2011                   MACON              MO   STORM CHASER

            TORNADO ON THE GROUND FOR 3-4 MINUTES

1102 PM     FUNNEL CLOUD     2 NE NEW BOSTON         39.97N 92.86W
06/14/2011                   LINN               MO   LAW ENFORCEMENT

1103 PM     HAIL             2 NW GOLDSBERRY         39.99N 92.81W
06/14/2011  E1.75 INCH       MACON              MO   PUBLIC

0105 AM     HAIL             2 SE LANCASTER          40.50N 92.50W
06/15/2011  M1.00 INCH       SCHUYLER           MO   CO-OP OBSERVER


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