Osage County

Osage County, MO

Data available through 1/1/2013

Date

Time (CST)

F/EF-Scale

Length (Miles)

Maximum Width (Yards)

Killed

Injured

Property Damage

Source*

5/18/1883

6:00 PM

F3

30

200

0

0

n/a

G

Formed over the extreme NE part of the county and moved into Warren County.  This tornado killed a total of 1 person and injured 8.  Maximum intensity was likely in Warren County.

5/27/1896

6:15 PM

F4

5

150

2

3

n/a

G

Moved ENE, passing 4 1/2 miles SE of Chamois.  Two farms were destroyed and 2 children killed.  All 7 buildings on one farm were completely swept away.

5/1/1948

9:35 PM

F2

1

400

0

2

$500,000

G

Moved E, damaging, twisting, or unroofing every house in St. Thomas.

9/28/1959

3:45 PM

F1

6

100

0

1

$50,000

NCDC

Path began near Freeburg.  Crossed Highway 89 near Gasconade River.  Several farm buildings badly damaged.  Corn flattened by wind.

4/17/1969

7:00 PM

F1

1

200

0

0

>$5,000

NCDC

A tornado touched down about 6 miles SW of Chamois and caused damage to 4 farms in its path.  It moved from SSW to NNE.

6/21/1981

8:10 PM

F0

1

50

0

0

n/a

NCDC

5/1/1983

2:30 PM

F3

9

400

0

3

$1,400,000

NCDC

A tornado touched down near Route U about 4 miles southwest of Linn and lifted about 3 miles N of U.S. 50.  Eleven farms were damaged or destroyed.  One church and 5 commercial buildings as well as 3 vehicles were damaged or destroyed in and around Linn.  The Mosby Times Mirror Publication Company, a steel building had considerable damage to the building and contents. 

7/2/1992

6:40 PM

F1

0.5

50

0

0

>$50,000

NCDC

Tornado touched down briefly near Frankenstein and destroyed a tri-level home.

4/15/1994

2:45 AM

F1

25

70

0

0

n/a

NCDC

An intermittent damage track was produced by this tornado.  Formed near Elston around 225 am in Cole County and then crossed into Callaway County.  Crossed the Missouri River into Osage County.  Several barns near Frankenstein had part of their roofs blown off.

4/8/1999

6:00 PM

F1

8

200

0

0

$1,000,000

NCDC

The supercell that produced the tornado in Cole County produced another tornado in Osage County. Emergency officials estimated the damage to be around $1 million. 79 homes sustained some type of damage, mostly to roofs and siding. Fortunately almost all homes were covered by insurance. One mobile home was destroyed near Linn and several businesses sustained major roof damage. Hundreds of trees were downed northeast of Linn as the tornado tracked through a forested area.

3/12/2006

11:35 PM

F1

9

150

0

0

n/a

NCDC

The tornado that formed in southern Callaway County crossed the Missouri River and moved into northern Osage County to the Chamois area at about 11:40 pm CST. Tree damage was found near Main and West Tennessee Street. The tornado traveled northeast where it damaged the roofs of two barns throwing debris approximately 150 yards into an open field. This damage was rated as F1 intensity. Approximately 3 miles northeast of Chamois two sheds were destroyed and another shed and home were damaged. Debris was thrown at least 500 yards into a nearby open field. Numerous trees where damaged just northeast of this location with a damage width of approximately 150 yards wide. This damage was rated as low end F1intensity. The tornado continued northeast crossing the Missouri River again and back into southeast Callaway County.

3/12/2006

11:43 PM

F0

1

50

0

0

$0

NCDC

A small tornado formed in extreme northeast Osage County just south of the Missouri River causing tree damage. The tornado then crossed the river into southeast Callaway County. 

3/10/2010

10:25 PM

EF1

7

60

0

0

n/a

NCDC

A tornado touched down less than a mile west of Westphalia in northwest Osage County. A couple of large tree limbs were blown down in this location. The tornado travelled to the north northeast across U.S. Highway 63 to about 1.5 miles north of Westphalia, where it caused minor damage to two homes and downed large tree branches. The tornado continued to move to the north northeast crossing the Maries River. Tree damage was observed along the southern shore of the river. The tornado then moved across a large flood plain and struck a large cluster of oak and cedar trees at a farmstead on a ridge. Some of the oak trees were three feet in diameter and were either uprooted or snapped at the base. There were a couple of small utility buildings that were destroyed northeast of this area. There was also a row of cedar trees blown down to the northeast showing a convergent pattern. The damage width over this area was 60 yards and the damage was rated EF1. The tornado continued to skip and partially grazed a second farmstead and damaged two small buildings and trees. The tornado continued to skip across U.S. Highway 50 approximately half a mile west of Loose Creek before it ended on County Road 412, about a mile northwest of Loose Creek. The total damage track was 6.6 miles long. 

2/27/2011

10:15 AM

EF1

0.25

50

0

0

n/a

NCDC

EVENT NARRATIVE: A tornado hit a farmstead around 10:15PM one-half mile south of the intersection of County Roads 804 and 811 on a ridge. A large barn was totally destroyed while a brick ranch home had several broken windows on the west side. Roofing materials were also removed. A few trees and pines were snapped about half way up and tossed over 40 to 50 yards to the east. The width of the damage track was approximately 50 yards while damage intensity was rated EF1. The damage length was approximately a quarter of a mile. EPISODE NARRATIVE: A quasi-stationary frontal boundary was the main focusing mechanism for a round of significant severe weather over the forecast area. A strong shortwave moved along the boundary triggering widespread showers and thunderstorms. Numerous reports of large hail, damaging winds and 22 tornadoes occurred with this system.

*Sources

G - Grazulis, T. P., 1993: Significant Tornadoes 1680-1991.  A Chronology and Analysis of Events. Environmental Films, Tornado Project, St. Johnsbury, VT.

NCDC - National Climatic Data Center U.S. Local Storms Events Data (www.ncdc.noaa.gov)