Detroit/Pontiac, MI

Weather Forecast Office

May 31, 2011 Severe Weather & Bay County Tornado

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
103 PM EDT WED JUN 01 2011

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

0726 PM          TORNADO          3 N WILLARD                          43.71N 84.11W
05/31/2011                                  BAY                MI                        NWS STORM SURVEY

            THE TORNADO WAS RATED EF1 WITH MAXIMUM WINDS TO 95 MPH.
            PATH WIDTH...200 YARDS...PATH LENGTH...8.4 MILES. TORNADO
            STARTED NEAR PARISH AND 11 MILE ROAD JUST WEST OF THE
            COMMUNITY OF BEAVER. THE TORNADO THEN MOVED THROUGH
            BEAVER...CROSSED INTERSTATE 75...AND FINALLY ACROSS THE
            SOUTH PART OF LINWOOD BEFORE MOVING OUT TO SAGINAW BAY AT
            737 PM. A BARN WAS DESTROYED AND HOMES WERE DAMAGED NEAR
            BEAVER...MOSTLY TO GARAGES AND ROOFING MATERIAL. NUMEROUS
            TREES WERE UPROOTED WITH SNAPPED LARGE LIMBS.

Radar reflectivity indicating the "hook echo" over western Bay County as the tornado was touching down

NWS White Lake radar reflectivity image from 7:24 p.m. (above). The low level rotation within the storm is inferred from the "hook echo".

NWS White Lake radar rotation at 724 p.m. (above). The brighter yellow-green color in western Bay County indicates the strong rotation responsible for the tornado.

PRELIMINARY LOCAL STORM REPORT...SUMMARY

NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI

1123 PM EDT TUE MAY 31 2011

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...

..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....

..REMARKS..

0648 PM HAIL 11 W MIDLAND 43.62N 84.45W

05/31/2011 E1.00 INCH MIDLAND MI TRAINED SPOTTER

0706 PM FUNNEL CLOUD NNW SANFORD 43.68N 84.38W

05/31/2011 MIDLAND MI TRAINED SPOTTER

FUNNEL CLOUD REPORT NEAR SANFORD LAKE

0706 PM HAIL 2 ESE SANFORD 43.66N 84.35W

05/31/2011 M1.50 INCH MIDLAND MI TRAINED SPOTTER

HAIL REPORTED AT WACKERLY RD

0715 PM TSTM WND DMG 4 ESE BOMBAY 43.72N 84.19W

05/31/2011 MIDLAND MI TRAINED SPOTTER

TREES UPROOTED WITH MEASURED 71 MPH WINDS. ALSO, FUNNEL

CLOUD WAS REPORTED.

0715 PM HAIL 5 WNW MIDLAND 43.66N 84.31W

05/31/2011 M1.00 INCH MIDLAND MI TRAINED SPOTTER

REPORTED AT WACKERLY RD AND US 10

0725 PM HAIL 5 NE SANFORD 43.72N 84.30W

05/31/2011 M1.75 INCH MIDLAND MI TRAINED SPOTTER

0727 PM HAIL 2 WNW CRUMP 43.77N 84.13W

05/31/2011 M1.25 INCH BAY MI TRAINED SPOTTER

REPORTED AT CARTER RD AND PREVO RD

0728 PM TORNADO 3 S CRUMP 43.71N 84.09W

05/31/2011 BAY MI BROADCAST MEDIA

VIEWER PROVIDED VIDEO OF A CONFIRMED TORNADO NEAR THE

INTERSECTION OF GARFIELD AND PARRISH RD.

0730 PM HAIL MIDLAND 43.62N 84.23W

05/31/2011 M1.00 INCH MIDLAND MI TRAINED SPOTTER

HAIL WENT THROUGH A TWO PANE GLASS SKYLIGHT

0730 PM TSTM WND DMG 6 N AUBURN 43.68N 84.09W

05/31/2011 BAY MI LAW ENFORCEMENT

TREES DOWN, POWER LINES DOWN, HOMES WITH WALLS BLOWN IN

AT THE INTERSECTION OF GARFIELD AND SEIDLERS RD IN BEAVER

TOWNSHIP

0809 PM MARINE TSTM WIND 8 ESE AU GRES 44.02N 83.54W

05/31/2011 M51.00 MPH LHZ421 MI C-MAN STATION

44 KNOT WINDS GUSTING TO 55 KNOTS AT GRAVELLY SHOALS

0900 PM TSTM WND GST NE PORT AUSTIN 44.04N 82.99W

05/31/2011 M62.00 MPH HURON MI TRAINED SPOTTER

REPORTED AT ADAMS RD AND STATE STREET