Severe Storms, Osseo WI Tornado of July 19, 2020

Overview

Early morning storms brought hail, sporadic damaging winds, and a tornado to portions of western and central Wisconsin Sunday, July 19th. Most of the severe weather occurred between midnight and 4 a.m.

The tornado hit a few miles southwest of Osseo, WI (Trempealeau County) and was on the ground for approximately 3 1/2 miles. There was damage to outbuildings, trees and crops.

Radar loop from late Sat night-early Sun morning (July 18-19, 2020)

Tornado
Photos
Radar
Storm Reports

Tornadoes:

Tornado - Osseo, WI
TREMPEALEAU COUNTY

Date	July 19, 2020
Time (Local)	12:50-12:57 a.m. CDT
EF Rating	EF1
Est. Peak Winds	105 mph
Path Length	3.65 miles
Max Width	200 yards
Injuries/Deaths	0
Summary: A brief tornado occurred during the early morning hours of July 19th in northern Trempealeau County, WI. Numerous trees were snapped or uprooted and damage occurred to several farm outbuildings, per photos and drone videos provided by Trempealeau County Emergency Management. Damage began roughly 4 miles west-southwest of Osseo and continued east-southeast before coming to an end roughly 3 miles south of Osseo.

Track Map

Downloadable KMZ File

The Enhanced Fujita (EF) Scale classifies tornadoes into the following categories:

EF0 Weak 65-85 mph	EF1 Moderate 86-110 mph	EF2 Significant 111-135 mph	EF3 Severe 136-165 mph	EF4 Extreme 166-200 mph	EF5 Catastrophic 200+ mph

Photos:

Damage southwest of Osseo, WI


(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)


(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)	(credit: Trempealeau Co, EM)

Radar:


Tornadic circulation (storm relative velocity) image of Osseo tornado	Correlation Coefficient dropout associated with tornadic debris

Storm Reports

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE LA CROSSE WI
549 PM CDT SUN JUL 19 2020

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

1250 AM     TORNADO          3 SW OSSEO              44.54N 91.26W
07/19/2020                   TREMPEALEAU        WI   NWS STORM SURVEY

            NUMEROUS TREES SNAPPED OR UPROOTED AND
            SEVERAL FARM OUTBUILDINGS DESTROYED IN A
            PATH FROM 4 WSW OSSEO TO 3 S OSSEO. DAMAGE
            CONFIRMED VIA PHOTOS AND VIDEO FROM
            TREMPEALEAU COUNTY EMERGENCY MANAGEMENT.

0100 AM     FUNNEL CLOUD     1 N OSSEO               44.59N 91.22W
07/19/2020                   TREMPEALEAU        WI   TRAINED SPOTTER



0130 AM     HAIL             2 S THORP               44.93N 90.80W
07/19/2020  E1.00 INCH       CLARK              WI   PUBLIC

            RELAYED FROM PICTURE ON SOCIAL MEDIA. TIME
            ESTIMATED FROM RADAR.

0332 AM     TSTM WND DMG     2 NNE FRIENDSHIP        44.00N 89.81W
07/19/2020                   ADAMS              WI   LAW ENFORCEMENT

            NUMEROUS TREES DOWN IN THE PRESTON AREA AND
            NEAR ROCHE-A-CRI STATE PARK. TIME ESTIMATED
            FROM RADAR.

0409 AM     TSTM WND DMG     4 S BROOKS              43.78N 89.64W
07/19/2020                   ADAMS              WI   LAW ENFORCEMENT

            A FEW TREES DOWN AROUND THE TOWN OF JACKSON.
            TIME ESTIMATED FROM RADAR.


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