Monday Evening (7/13) Storm Summary for Southern Wisconsin

After a bow echo moved through the area during the early morning hours Monday, July 13, a second round of thunderstorms moved through southern Wisconsin during the evening hours of the same day. The majority of the reports we received were for strong straight line winds over 60 MPH and some large hail. Numerous trees fell due to the winds, with some trees as large as 20 to 30 inches in diameter, with one as large as 38 inches in diameter falling southwest of Cambridge in Dane county. Hail measuring 1.50 inches in diameter were reported from Poynette in Columbia county. Finally, there was also a funnel cloud report at the Lone Rock airport (Tri County Regional Airport), but no touchdown occurred.

Loop of the storms between 5 PM and 9 PM July 13

Radar loop across southern Wisconsin starting around 5 PM and ending just after 8:30 PM.

Below is a summary map of the local storm reports on the left, along with rainfall amounts from these storms on the right.


Summary of storm reports. Light blue text represents wind gust speed, yellow text represents significant rain fall amounts, and green text represents hail diameter.	Rainfall totals from the storms the evening of July 13.

Here is a full summary of the storm reports for this event:

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

0626 PM     FUNNEL CLOUD     LONE ROCK AIRPORT       43.21N 90.19W
07/13/2015                   SAUK               WI   AMATEUR RADIO

            FUNNEL CLOUD IS VERY LOW TO THE GROUND AND HARD TO TELL
            IF IT IS IN CONTACT WITH THE GROUND.

0628 PM     TSTM WND GST     LONE ROCK AIRPORT       43.21N 90.19W
07/13/2015  M61.00 MPH       SAUK               WI   ASOS

0630 PM     TSTM WND DMG     7 ESE AVOCA             43.15N 90.20W
07/13/2015                   IOWA               WI   LAW ENFORCEMENT

            TIME OF EVENT ESTIMATED BY LOOKING AT WEATHER RADAR
            IMAGES. FALLEN TREE ON HWY 133.

0630 PM     HAIL             1 S SPRING GREEN        43.16N 90.07W
07/13/2015  E1.50 INCH       SAUK               WI   TRAINED SPOTTER

            1.5 INCH DIAMETER HAIL ON HWY 23. SOME LARGER HAIL. GUSTY
            WINDS ESTIMATED AT 50 MPH.

0631 PM     TSTM WND DMG     8 ESE AVOCA             43.14N 90.18W
07/13/2015                   IOWA               WI   LAW ENFORCEMENT

            TREE DOWN ON HWY C.

0638 PM     TSTM WND DMG     5 SW PORTAGE            43.50N 89.54W
07/13/2015                   COLUMBIA           WI   LAW ENFORCEMENT

            TREE DOWN ON ROAD.

0647 PM     TSTM WND DMG     5 WNW POYNETTE          43.42N 89.50W
07/13/2015                   COLUMBIA           WI   LAW ENFORCEMENT

            TREE DOWN ON KENT ROAD.

0649 PM     TSTM WND DMG     4 WNW POYNETTE          43.41N 89.48W
07/13/2015                   COLUMBIA           WI   LAW ENFORCEMENT

            ANOTHER TREE DOWN ON KENT ROAD.

0654 PM     HAIL             POYNETTE                43.39N 89.41W
07/13/2015  M1.50 INCH       COLUMBIA           WI   PUBLIC

            TIME ESTIMATED FROM RADAR.

0658 PM     HAIL             3 NE POYNETTE           43.42N 89.37W
07/13/2015  M1.50 INCH       COLUMBIA           WI   PUBLIC

0719 PM     TSTM WND GST     1 W SUN PRAIRIE         43.18N 89.25W
07/13/2015  M55.00 MPH       DANE               WI   TRAINED SPOTTER

            ALSO MARBLE SIZED HAIL REPORTED.

0723 PM     TSTM WND DMG     EAST BRISTOL            43.27N 89.15W
07/13/2015                   DANE               WI   LAW ENFORCEMENT

            3 FOOT DIAMETER TREE ON ROAD.

0741 PM     TSTM WND DMG     2 NW ROCKDALE           42.99N 89.06W
07/13/2015                   DANE               WI   LAW ENFORCEMENT

            20 INCH TO 30 INCH DIAMETER TREES DOWN. SHINGLE AND
            SIDING DAMAGE AT ONE RESIDENCE.

0743 PM     TSTM WND DMG     ROCKDALE                42.97N 89.03W
07/13/2015                   DANE               WI   LAW ENFORCEMENT

            20 INCH TO 30 INCH DIAMETER TREES DOWN. POWER LINES DOWN
            FROM TREES LANDING ON THEM. SOME TREES FELL ON HOUSES.

0754 PM     TSTM WND DMG     3 NE UTICA              43.00N 89.08W
07/13/2015                   DANE               WI   AMATEUR RADIO

            10 INCH TO 12 INCH DIAMETER TREE BRANCHES BLOWN DOWN.

0803 PM     TSTM WND DMG     2 WSW CAMBRIDGE         42.99N 89.05W
07/13/2015                   DANE               WI   AMATEUR RADIO

            ONE 38 INCH DIAMETER TREE DOWN. OTHER TREES TOPPLED IN
            THE AREA.

0814 PM     TSTM WND DMG     2 NE UTICA              42.99N 89.09W
07/13/2015                   DANE               WI   AMATEUR RADIO

            12 INCH TO 28 INCH DIAMETER TREE BRANCHES DOWN. WIND
            DAMAGE TO ROOF SHINGLES AND ROOF FLASHING.

0830 PM     TSTM WND GST     4 W BROOKFIELD          43.06N 88.20W
07/13/2015  M58.00 MPH       WAUKESHA           WI   TRAINED SPOTTER

            A 6 INCH DIAMETER TREE DOWN. THE TOP HALF OF A 12 INCH
            DIAMETER TREE DOWN ON A GARAGE

0832 PM     TSTM WND GST     3 NE TIBBETS            42.77N 88.54W
07/13/2015  E49.00 MPH       WALWORTH           WI   AMATEUR RADIO

            ESTIMATED 49 MPH WIND GUST 2.9 MILES NE OF TIBBETS.

0840 PM     TSTM WND GST     1 N WEST BEND           43.44N 88.18W
07/13/2015  E50.00 MPH       WASHINGTON         WI   TRAINED SPOTTER

            SMALL TREE BRANCHES DOWN.

0855 PM     TSTM WND DMG     LA GRANGE               42.80N 88.60W
07/13/2015                   WALWORTH           WI   AMATEUR RADIO

            MINOR DAMAGE TO TREE BRANCHES.

0900 PM     MARINE TSTM WIND MILWAUKEE               43.03N 87.92W
07/13/2015  M39.00 MPH       MILWAUKEE          WI   C-MAN STATION

Schultz

NWS Milwaukee/Sullivan