Severe Weather of May 31, 2013 


Radar / Photos Local Storm Reports Rainfall Reports

The final day of 3 straight severe weather events occurred on May 31, 2013.  Many severe weather events typically go through the Upper Mississippi River Valley region in "one fell swoop."  However, this event took many hours due to:

  • A persistent south wind bringing unstable air into the region
  • Triggering mechanisms for thunderstorms moving southwest to northeast, versus the more typical west to east
  • A long time for cooler air to invade the region
  • Plenty of shear (defined as change of wind speed or direction going from the ground up through the atmosphere) to support severe thunderstorms

The first wave of thunderstorms, which occurred between 2:30 p.m. and 6:00 p.m., was triggered by a trough of low pressure moving through the upper levels of the atmosphere. The main hazard coming from these storms was hail with sizes up to half dollar size.

The second wave of thunderstorms, which occurred between 6 and 9 p.m., was trigged by a dry-line. Dry-lines separate more humid air from drier air. For example, at 6 pm, the relative humidity at Austin, MN was 36% compared to 50% at Rochester, MN.  The storms that formed on the dry-line produced a brief tornado (EF0) near Floyd, IA, a funnel cloud in Merrilan, WI, hail to the size of quarters and winds up to 57 mph.  The tornado (EF0) touched down 2.5 miles north of Floyd, IA along Highway 218 and 130th Ave for only a minute and there was no reports of damage. (See images below)

Lastly, the third wave of thunderstorms, which occurred between 8:30 p.m. and Midnight, formed when a cold front moved into the region from the west.  These storms produced hail up to the size of golf balls along with wind gusts to 60 mph. In addition, the cold front took some time to get through the area, resulting in heavy rain with some of the storms. This heavy rain led to localized flooding in northern Mitchell County in Iowa.


Radar Loop of May 31, 2013 funnel cloud near floyd iowa funnel cloud near floyd iowa
Radar loop from 2:40 to 11:30 p.m.
Click on radar image for a larger loop
(warning: will take longer to load)
Photo from video by Floyd Vol. Fire Dept. Brief tornado touchdown near Floyd, IA
shelf cloud tornado near floyd iowa hail photo from eyota minnesota
Shelf cloud photo near Rock Dell, MN Brief tornado near Floyd, IA. Photo by Charles City Police Dept. Large hail that fell in Eyota, MN
funnel cloud near floyd iowa funnel cloud near rudd iowa funnel cloud near rudd iowa
Funnel cloud photo near Floyd, IA Funnel cloud photo taken from Rudd, IA Funnel cloud photo taken from Rudd, IA

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Storm Reports

May 31 2013 severe weather reports

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

0305 PM     HAIL             PLAINVIEW               44.17N 92.17W
05/31/2013  M0.88 INCH       WABASHA            MN   TRAINED SPOTTER

            CALLED IN BY DISPATCH

0306 PM     HAIL             EYOTA                   43.99N 92.23W
05/31/2013  E0.25 INCH       OLMSTED            MN   PUBLIC

0308 PM     HAIL             EYOTA                   43.99N 92.23W
05/31/2013  E0.75 INCH       OLMSTED            MN   TRAINED SPOTTER

            DIME SIZE HAIL

0313 PM     HAIL             5 SW KELLOGG            44.26N 92.07W
05/31/2013  E1.75 INCH       WABASHA            MN   TRAINED SPOTTER

            BETWEEN PLAINVIEW AND KELLOGG

0316 PM     HAIL             PLAINVIEW               44.17N 92.17W
05/31/2013  E0.25 INCH       WABASHA            MN   TRAINED SPOTTER

0321 PM     HAIL             MAXVILLE                44.56N 92.00W
05/31/2013  E0.50 INCH       BUFFALO            WI   TRAINED SPOTTER

0322 PM     HAIL             1 WSW WABASHA           44.37N 92.06W
05/31/2013  E0.75 INCH       WABASHA            MN   LAW ENFORCEMENT

            DIME SIZE HAIL ALONG HIGHWAY 60 NEAR WABASHA

0400 PM     HAIL             3 NW FOUNTAIN CITY      44.15N 91.74W
05/31/2013  E0.25 INCH       BUFFALO            WI   PARK/FOREST SRVC

0401 PM     HAIL             FOUNTAIN CITY           44.12N 91.70W
05/31/2013  E0.88 INCH       BUFFALO            WI   EMERGENCY MNGR

0402 PM     HAIL             2 NW FOUNTAIN           43.76N 92.16W
05/31/2013  E0.88 INCH       FILLMORE           MN   TRAINED SPOTTER

            COVERING THE ROAD

0409 PM     HAIL             1 W ELEVA               44.58N 91.49W
05/31/2013  M0.88 INCH       TREMPEALEAU        WI   TRAINED SPOTTER

            WINDS 55 MPH

0430 PM     HAIL             3 S INDEPENDENCE        44.32N 91.42W
05/31/2013  M1.25 INCH       TREMPEALEAU        WI   LAW ENFORCEMENT

0430 PM     HAIL             INDEPENDENCE            44.36N 91.42W
05/31/2013  E0.75 INCH       TREMPEALEAU        WI   PUBLIC

            REPORTED AT POST OFFICE AT START OF STORM

0433 PM     HAIL             INDEPENDENCE            44.36N 91.42W
05/31/2013  E1.00 INCH       TREMPEALEAU        WI   PUBLIC

            LARGEST SIZED HAIL AT POST OFFICE

0436 PM     HAIL             3 NE INDEPENDENCE       44.39N 91.38W
05/31/2013  E1.00 INCH       TREMPEALEAU        WI   TRAINED SPOTTER

0438 PM     HAIL             STRUM                   44.55N 91.39W
05/31/2013  E0.88 INCH       TREMPEALEAU        WI   911 CALL CENTER

0459 PM     HAIL             OSSEO                   44.58N 91.22W
05/31/2013  E0.50 INCH       TREMPEALEAU        WI   911 CALL CENTER

0529 PM     HAIL             4 WNW MEDFORD           45.16N 90.42W
05/31/2013  E0.88 INCH       TAYLOR             WI   911 CALL CENTER

0531 PM     HAIL             4 E PERKINSTOWN         45.20N 90.55W
05/31/2013  E0.50 INCH       TAYLOR             WI   PUBLIC

0551 PM     HAIL             4 E PERKINSTOWN         45.20N 90.55W
05/31/2013  E1.00 INCH       TAYLOR             WI   PUBLIC

            HAIL WAS CLEAR COMPARED TO EARLIER STORM

0552 PM     HAIL             1 SE ESADORE LAKE       45.18N 90.44W
05/31/2013  E0.25 INCH       TAYLOR             WI   PUBLIC

0617 PM     TORNADO          1 E FLOYD               43.13N 92.72W
05/31/2013                   FLOYD              IA   EMERGENCY MNGR

            BRIEF TOUCHDOWN AT 160TH AND PACKARD AVE

0632 PM     FUNNEL CLOUD     5 E NEW HAVEN           43.28N 92.55W
05/31/2013                   HOWARD             IA   911 CALL CENTER

            NUMEROUS REPORT OF FUNNEL CLOUDS NEAR COUNTY LINE. NO
            TOUCHDOWNS REPORTED SO FAR.

0652 PM     HAIL             MONDOVI                 44.57N 91.67W
05/31/2013  E0.25 INCH       BUFFALO            WI   911 CALL CENTER

0729 PM     HAIL             4 W ARCADIA             44.25N 91.57W
05/31/2013  E0.88 INCH       BUFFALO            WI   FIRE DEPT/RESCUE

            FIRE DEPARTMENT REPORTED WHILE SPOTTING

0738 PM     HAIL             3 N ARCADIA             44.30N 91.49W
05/31/2013  E0.88 INCH       TREMPEALEAU        WI   FIRE DEPT/RESCUE

0750 PM     HAIL             3 NE INDEPENDENCE       44.39N 91.38W
05/31/2013  E0.25 INCH       TREMPEALEAU        WI   PUBLIC

0754 PM     HAIL             WHITEHALL               44.37N 91.31W
05/31/2013  E0.75 INCH       TREMPEALEAU        WI   911 CALL CENTER

0817 PM     HAIL             PIGEON FALLS            44.42N 91.21W
05/31/2013  E1.00 INCH       TREMPEALEAU        WI   PUBLIC

0844 PM     FUNNEL CLOUD     2 NW MERRILLAN          44.47N 90.87W
05/31/2013                   JACKSON            WI   NWS EMPLOYEE

            DISSIPATED NOW BACK TO WALL CLOUD

0855 PM     HAIL             4 S ROCHESTER           43.96N 92.48W
05/31/2013  E1.00 INCH       OLMSTED            MN   CO-OP OBSERVER

0855 PM     TSTM WND GST     4 S ROCHESTER           43.96N 92.48W
05/31/2013  M57.00 MPH       OLMSTED            MN   911 CALL CENTER

0903 PM     HAIL             AUSTIN                  43.67N 92.97W
05/31/2013  E0.50 INCH       MOWER              MN   BROADCAST MEDIA

            REPORTED AT KAAL TELEVISION

0910 PM     HAIL             1 N STEWARTVILLE        43.87N 92.49W
05/31/2013  E0.50 INCH       OLMSTED            MN   TRAINED SPOTTER

0911 PM     HAIL             STEWARTVILLE            43.86N 92.49W
05/31/2013  E0.75 INCH       OLMSTED            MN   BROADCAST MEDIA

0925 PM     HAIL             LYLE                    43.51N 92.94W
05/31/2013  E0.25 INCH       MOWER              MN   911 CALL CENTER

0933 PM     HAIL             4 E STEWARTVILLE        43.86N 92.41W
05/31/2013  E0.75 INCH       OLMSTED            MN   AMATEUR RADIO

0937 PM     HAIL             4 E STEWARTVILLE        43.86N 92.41W
05/31/2013  E0.88 INCH       OLMSTED            MN   AMATEUR RADIO

            WIND IS PICKING UP

0940 PM     HAIL             PREDMORE                43.93N 92.34W
05/31/2013  E1.00 INCH       OLMSTED            MN   AMATEUR RADIO

            GROUND COVERED WITH HAIL

0943 PM     HAIL             2 SW EYOTA              43.97N 92.26W
05/31/2013  E0.25 INCH       OLMSTED            MN   TRAINED SPOTTER

0945 PM     HAIL             7 SE ROCHESTER          43.94N 92.38W
05/31/2013  E1.75 INCH       OLMSTED            MN   NWS EMPLOYEE

0945 PM     HAIL             2 SW EYOTA              43.97N 92.26W
05/31/2013  E1.00 INCH       OLMSTED            MN   TRAINED SPOTTER

0946 PM     HAIL             PREDMORE                43.93N 92.34W
05/31/2013  E0.25 INCH       OLMSTED            MN   AMATEUR RADIO

0947 PM     HAIL             1 SW EYOTA              43.98N 92.24W
05/31/2013  E1.00 INCH       OLMSTED            MN   TRAINED SPOTTER

0950 PM     HAIL             1 W EYOTA               43.99N 92.25W
05/31/2013  E0.25 INCH       OLMSTED            MN   AMATEUR RADIO

0950 PM     TSTM WND GST     GRAND MEADOW            43.71N 92.57W
05/31/2013  M30.00 MPH       MOWER              MN   FIRE DEPT/RESCUE

            PEA SIZE HAIL AS WELL

1014 PM     HAIL             ALTURA                  44.07N 91.94W
05/31/2013  E0.25 INCH       WINONA             MN   FIRE DEPT/RESCUE

1017 PM     HAIL             3 NE DOVER              44.00N 92.09W
05/31/2013  E0.25 INCH       OLMSTED            MN   AMATEUR RADIO

1018 PM     HAIL             2 S LEWISTON            43.96N 91.87W
05/31/2013  E0.50 INCH       WINONA             MN   TRAINED SPOTTER

1021 PM     HAIL             ALTURA                  44.07N 91.94W
05/31/2013  E0.75 INCH       WINONA             MN   FIRE DEPT/RESCUE

1030 PM     HAIL             2 W PRESTON             43.67N 92.12W
05/31/2013  E0.25 INCH       FILLMORE           MN   TRAINED SPOTTER

1033 PM     HAIL             ALTURA                  44.07N 91.94W
05/31/2013  E0.50 INCH       WINONA             MN   AMATEUR RADIO

1037 PM     TSTM WND GST     ARCADIA                 44.25N 91.49W
05/31/2013  E45.00 MPH       TREMPEALEAU        WI   LAW ENFORCEMENT

1044 PM     HAIL             1 NW LE ROY             43.52N 92.52W
05/31/2013  E1.00 INCH       MOWER              MN   FIRE DEPT/RESCUE

1045 PM     HAIL             OSTRANDER               43.61N 92.43W
05/31/2013  E0.25 INCH       FILLMORE           MN   911 CALL CENTER

1050 PM     TSTM WND GST     WHALAN                  43.73N 91.93W
05/31/2013  E60.00 MPH       FILLMORE           MN   PUBLIC

1059 PM     HAIL             WHALAN                  43.73N 91.93W
05/31/2013  E0.25 INCH       FILLMORE           MN   TRAINED SPOTTER

1111 PM     HAIL             ST. ANSGAR              43.38N 92.92W
05/31/2013  E1.00 INCH       MITCHELL           IA   911 CALL CENTER

1111 PM     FLASH FLOOD      CARPENTER               43.41N 93.02W
05/31/2013                   MITCHELL           IA   911 CALL CENTER

            FLOODING HAS STARTED OVER NEARBY ROADS



Rainfall Reports

...24 HOUR RAINFALL TOTALS ACROSS THE AREA...

LOCATION                   RAINFALL    TIME     LAT/LON


NORTHEAST IOWA

...ALLAMAKEE COUNTY...
DORCHESTER 3S              0.50        0700 AM  43.42N 91.51W
LANSING 4SE                0.02        0700 AM  43.32N 91.16W

...CHICKASAW COUNTY...
IONIA                      0.68        0700 AM  43.03N 92.50W
NEW HAMPTON                0.43        0700 AM  43.06N 92.31W

...CLAYTON COUNTY...
ELKADER                    0.01        0700 AM  42.84N 91.40W
VOLGA                       T          0700 AM  42.81N 91.52W

...FLOYD COUNTY...
COLWELL                    0.64        0700 AM  43.16N 92.59W
NASHUA                     0.58        0700 AM  42.94N 92.57W
CHARLES CITY COOP          0.40        0700 AM  43.08N 92.67W
CHARLES CITY CEDAR RVR     0.32        0700 AM  43.06N 92.67W
CHARLES CITY AWOS          0.22        0700 AM  43.07N 92.61W

...HOWARD COUNTY...
CRESCO                     0.50        0700 AM  43.37N 92.11W

...MITCHELL COUNTY...
ST ANSGAR 4E               1.35        0700 AM  43.37N 92.83W
OSAGE                      0.11        0700 AM  43.28N 92.81W

...WINNESHIEK COUNTY...
BLUFFTON                   0.54        0700 AM  43.41N 91.90W
DECORAH UPPER IA RVR       0.43        0700 AM  43.30N 91.80W
DECORAH 8ENE               0.36        0700 AM  43.34N 91.64W

SOUTHEAST MINNESOTA

...FILLMORE COUNTY...
SPRING VALLEY 3E           1.58        0700 AM  43.68N 92.33W
SPRING VALLEY 1 NW         1.15        0700 AM  43.70N 92.40W
SPRING VALLEY              1.14        0700 AM  43.69N 92.39W
PRESTON AWOS               1.08        0700 AM  43.68N 92.18W
LANESBORO                  0.98        0700 AM  43.72N 91.97W
PRESTON                    0.89        0700 AM  43.67N 92.07W
CHATFIELD 9ESE             0.76        0700 AM  43.79N 92.03W
HIGHLAND                   0.68        0700 AM  43.65N 91.84W
WHALAN 3SSE                0.50        0700 AM  43.69N 91.90W

...HOUSTON COUNTY...
CALEDONIA 5S               1.02        0700 AM  43.56N 91.51W
CALEDONIA 1 NW             0.39        0700 AM  43.62N 91.48W
MOUND PRAIRIE              0.27        0700 AM  43.78N 91.45W
BROWNSVILLE                0.25        0700 AM  43.70N 91.27W
HOUSTON                    0.24        0700 AM  43.77N 91.57W

...MOWER COUNTY...
GRAND MEADOW               0.44        0700 AM  43.71N 92.56W
AUSTIN AWOS                0.28        0700 AM  43.67N 92.93W
AUSTIN  DOBBINS CR         0.25        0700 AM  43.67N 92.95W
LANSING                    0.20        0700 AM  43.75N 92.95W
AUSTIN WTR TRTMNT PLANT    0.17        0700 AM  43.67N 92.97W
AUSTIN  TURTLE CREEK       0.13        0700 AM  43.65N 92.98W

...OLMSTED COUNTY...
EYOTA 5W                   2.35        0700 AM  43.98N 92.34W
ROCHESTER ASOS             1.23        0700 AM  43.91N 92.50W
KINGSLEY CORNER 3 NNW      0.76        0700 AM  44.04N 92.09W
ELGIN 2SSW                 0.65        0700 AM  44.10N 92.27W
DOVER 1E                   0.63        0700 AM  43.97N 92.12W
ELBA                       0.56        0700 AM  44.05N 92.05W
ROCHESTER MAPLE VALLEY     0.50        0700 AM  44.02N 92.42W
ROCHESTER 6ENE             0.33        0700 AM  44.05N 92.37W
BYRON 6S                   0.23        0700 AM  43.96N 92.63W
ROCHESTER - BEAR CREEK     0.22        0700 AM  43.92N 92.48W
ROCHESTER - SILVER CREEK   0.22        0700 AM  44.03N 92.42W
ROCHESTER - CASCADE CREEK  0.20        0700 AM  44.03N 92.48W
ROCHESTER 5SW              0.16        0700 AM  43.98N 92.56W
POST TOWN                  0.14        0700 AM  44.09N 92.82W
BYRON                      0.12        0700 AM  44.07N 92.66W
ROCHESTER BELTLINE         0.12        0700 AM  43.91N 92.50W
ORONOCO                    0.11        0700 AM  44.17N 92.55W

...WABASHA COUNTY...
THEILMAN                   0.42        0700 AM  44.28N 92.19W
KELLOGG                    0.36        0700 AM  44.32N 92.00W
WABASHA                    0.31        0700 AM  44.39N 92.05W
LAKE CITY                  0.13        0700 AM  44.45N 92.26W
ZUMBRO FALLS 4SSW          0.11        0700 AM  44.24N 92.46W

...WINONA COUNTY...
MINNESOTA CITY             1.41        0700 AM  44.16N 91.81W
ALTURA                     1.06        0700 AM  44.15N 92.01W
WINONA DAM 5A              0.90        0700 AM  44.09N 91.67W
WINONA AWOS                0.60        0700 AM  44.08N 91.70W
LEWISTON                   0.58        0700 AM  43.98N 91.87W
WINONA 4SE                 0.40        0700 AM  44.02N 91.61W
LA CRESCENT DAM 7          0.38        0700 AM  43.87N 91.31W
DAKOTA                     0.02        0700 AM  43.92N 91.37W

SOUTHWEST AND CENTRAL WISCONSIN

...BUFFALO COUNTY...
ALMA DAM 4                 0.65        0700 AM  44.33N 91.92W

...CLARK COUNTY...
OWEN                       0.55        0700 AM  44.98N 90.55W
NEILLSVILLE 1W             0.01        0700 AM  44.56N 90.61W

...CRAWFORD COUNTY...
FERRYVILLE                  T          0700 AM  43.35N 91.10W

...JACKSON COUNTY...
BLACK RIVER FALLS 2NNE     0.16        0700 AM  44.32N 90.83W
BLACK RIVER FALLS RAWS     0.10        0700 AM  44.30N 90.84W
BLACK RIVER FALLS AWOS     0.08        0700 AM  44.25N 90.86W

...LA CROSSE COUNTY...
LA CROSSE 5SE              0.31        0700 AM  43.77N 91.15W
LA CROSSE WFO              0.27        0700 AM  43.82N 91.19W
LA CROSSE 4NNW             0.26        0700 AM  43.87N 91.27W
HOLMEN 2S                  0.23        0700 AM  43.93N 91.25W
LA CROSSE ASOS             0.22        0700 AM  43.88N 91.26W
LA CROSSE                  0.21        0700 AM  43.80N 91.37W
HOLMEN                     0.14        0700 AM  43.97N 91.27W
HOLLAND                    0.13        0700 AM  43.97N 91.29W

...MONROE COUNTY...
FOUR CORNERS               0.11        0700 AM  44.07N 90.92W
SPARTA WASTE WTR           0.07        0700 AM  43.94N 90.82W
TUNNEL CITY                0.03        0700 AM  44.01N 90.57W
SPARTA AWOS                0.02        0700 AM  43.96N 90.74W

...RICHLAND COUNTY...
RICHLAND CENTER            0.02        0700 AM  43.32N 90.38W

...TAYLOR COUNTY...
JUMP RIVER                 1.45        0700 AM  45.36N 90.80W
MEDFORD                    0.46        0700 AM  45.13N 90.34W
GAD 6E                     0.44        0700 AM  45.14N 90.20W
LUBLIN DIAMOND LAKE        0.38        0700 AM  45.11N 90.69W

...TREMPEALEAU COUNTY...
OSSEO                      0.50        0700 AM  44.58N 91.22W
ETTRICK                    0.49        0700 AM  44.11N 91.22W
GALESVILLE 2WSW            0.38        0700 AM  44.07N 91.39W
TREMPEALEAU 2NW            0.30        0700 AM  44.03N 91.46W
GALESVILLE 3ENE            0.29        0700 AM  44.09N 91.29W
TREMPEALEAU DAM 6          0.18        0700 AM  44.00N 91.44W

...VERNON COUNTY...
STODDARD                   0.49        0700 AM  43.66N 91.24W
GENOA                      0.38        0700 AM  43.57N 91.23W
DESOTO 1SE                 0.03        0700 AM  43.41N 91.19W
HILLSBORO 1 WSW            0.01        0700 AM  43.65N 90.35W

OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING
EQUIPMENT AND EXPOSURE. NOT ALL DATA LISTED IS CONSIDERED OFFICIAL.

 


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