Heavy Rains and Severe Thunderstorms in Southwest Minnesota July 7 and 9, 2009

On the heels of severe storms and a tornado reported in Cottonwood County on Tuesday July 7th, more severe thunderstorms rolled across southwest Minnesota on Thursday July 9th. A tornado was reported by a storm spotter three and a half miles southwest of Fulda near the border of Murray and Nobles County. One to three inches of rain fell across the southern tier counties of Minnesota along the Iowa border from Worthington to Blue Earth. The heaviest rain reported was 3.53 inches at Lakefield in Jackson County. Some street flooding was reported in Worthington along with some golf ball sized hail to the west and northwest of Worthington.

The storms formed out ahead of a sluggish cold front in the Dakotas. Both rounds of storms missed the areas in the state that needed the rain the most. The cool front pushed to the east over Minnesota during the day on July 10th and ushered in northwest winds and drier air. The dew point temperature at the Twin Cities International Airport fell from 63 degrees at noon to 52 degrees by 3pm.

Below are Public Information Statements on the July 8-9 storms courtesy the National Weather Service.



PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
808 AM CDT WED JUL 08 2009

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


0610 PM     TORNADO          6 N STORDEN             44.13N 95.32W
07/07/2009                   COTTONWOOD         MN   LAW ENFORCEMENT

0623 PM     FUNNEL CLOUD     2 WNW HERON LAKE        43.81N 95.36W
07/07/2009                   JACKSON            MN   TRAINED SPOTTER

0
0635 PM     HAIL             WINDOM                  43.87N 95.12W
07/07/2009  E0.25 INCH       COTTONWOOD         MN   TRAINED SPOTTER

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
736 PM CDT TUE JUL 07 2009

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

0728 PM     TSTM WND GST     CEYLON                  43.53N 94.63W
07/07/2009  E50 MPH          MARTIN             MN   LAW ENFORCEMENT

            MARTIN COUNTY 911 CENTER RELAYED REPORT OF 50 MPH WIND
            GUSTS IN CEYLON.


PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1138 PM CDT THU JUL 09 2009

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

1131 PM     FLASH FLOOD      WORTHINGTON             43.63N 95.60W
07/09/2009                   NOBLES             MN   EMERGENCY MNGR

            THE HIGHWAY 59/60 UNDERPASS IN THE SOUTHEAST PART OF
            WORTHINGTON IS FLOODED BY THE HEAVY RAIN.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1044 PM CDT THU JUL 09 2009

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

0910 PM     TSTM WND DMG     3 NW HERON LAKE         43.83N 95.37W
07/09/2009                   JACKSON            MN   PUBLIC

            TREE-TOPPED.

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1034 PM CDT THU JUL 09 2009

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


0747 PM     HAIL             ELLSWORTH               43.52N 96.02W
07/09/2009  E1.75 INCH       NOBLES             MN   TRAINED SPOTTER


0822 PM     HAIL             2 W WORTHINGTON         43.63N 95.64W
07/09/2009  E1.75 INCH       NOBLES             MN   BROADCAST MEDIA

0827 PM     HAIL             2 NW WORTHINGTON        43.65N 95.63W
07/09/2009  E1.75 INCH       NOBLES             MN   LAW ENFORCEMENT

0829 PM     HAIL             3 NW WORTHINGTON        43.66N 95.64W
07/09/2009  E1.00 INCH       NOBLES             MN   TRAINED SPOTTER

0833 PM     FLASH FLOOD      WORTHINGTON             43.63N 95.60W
07/09/2009                   NOBLES             MN   BROADCAST MEDIA

            FLOODED INTERSECTION OF 10TH STREET AND 8TH AVENUE


0840 PM     TSTM WND DMG     6 N BREWSTER            43.78N 95.46W
07/09/2009                   NOBLES             MN   AMATEUR RADIO

            8-10 INCH BRANCHES SNAPPED


0903 PM     HAIL             N DUNDEE                43.85N 95.47W
07/09/2009  E1.00 INCH       NOBLES             MN   TRAINED SPOTTER



PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
955 AM CDT FRI JUL 10 2009

24 HOUR PRECIPITATION DATA IN INCHES...FOR SOUTHWEST MINNESOTA
...RECEIVED BY 9 AM FRIDAY JULY 10 2009.

...SOUTHWEST MINNESOTA...

  LAKEFIELD                                3.53
  JACKSON AIRPORT                          2.78
  WORTHINGTON COOP                         2.14
  WORTHINGTON 1.4 NNE                      2.13
  WORTHINGTON AIRPORT                      1.59
  HERON LAKE 7E                            1.24
  WINDOM AIRPORT                           0.55
  LUVERNE AIRPORT                          0.16
  SLAYTON                                  0.12
  TRACY AIRPORT                            0.10
  PIPESTONE                                0.10
  WESTBROOK 1.4 NW                         0.05
  MARSHALL COOP                            0.02