June 18, 2009:  Large Hail in Central Minnesota

Event Synopsis  |  All Storm Reports 

 Event Synopsis

     A very unstable air mass was in place across central and southern Minnesota on June 18th.  An approaching upper level disturbance and low pressure system from the eastern Dakotas allowed thunderstorms to develop in central Minnesota during the early afternoon, with the initial ones becoming rapidly severe near Alexandria.  These would slowly evolve eastward in central Minnesota through the remainder of the day, producing namely large hail.  Southern Minnesota was stifled from the severe thunderstorms due to a "cap" in place.  A cap is what meteorologists label the warm air aloft that prevents the atmospheric instability from being realized, and hence what can stifle thunderstorm development. The strength of these features depends on many factors through the depth of the lower atmosphere, and thus their magnitude can be challenging to forecast greater than 12 hours in advance.  While little in the way of thunderstorms developed in southern Minnesota, thunderstorms continued to re-intensify across central Minnesota through the evening hours.

June 18, 2009: 1 pm Surface Weather Map

sfcmap

 

 Storm Reports

The map above and the below listing are of severe weather reports received during or soon after the event by the National Weather Service from local government officials or trained storm spotters.  These reports should be considered preliminary and are open to further quality controlling by NWS officials.   For reports from across the country, click here.

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
627 AM CDT FRI JUN 19 2009
..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..
0125 PM     HAIL             4 W MILLERVILLE         46.07N 95.63W
06/18/2009  E0.88 INCH       DOUGLAS            MN   TRAINED SPOTTER
0128 PM     HAIL             2 W MILLERVILLE         46.07N 95.60W
06/18/2009  E0.75 INCH       DOUGLAS            MN   TRAINED SPOTTER
0130 PM     HAIL             4 W MILLERVILLE         46.07N 95.63W
06/18/2009  E1.25 INCH       DOUGLAS            MN   TRAINED SPOTTER

            HAIL INCREASED FROM NICKLE TO 1.25 IN SIZE
0133 PM     HAIL             MILLERVILLE             46.07N 95.55W
06/18/2009  E1.00 INCH       DOUGLAS            MN   TRAINED SPOTTER
0135 PM     HAIL             4 W MILLERVILLE         46.07N 95.63W
06/18/2009  E1.50 INCH       DOUGLAS            MN   TRAINED SPOTTER
0232 PM     HAIL             2 N ALEXANDRIA          45.90N 95.38W
06/18/2009  E1.75 INCH       DOUGLAS            MN   TRAINED SPOTTER

            LARGE HAIL ACROSS NORTHERN PART OF CITY.
0234 PM     FUNNEL CLOUD     ALEXANDRIA              45.87N 95.38W
06/18/2009                   DOUGLAS            MN   LAW ENFORCEMENT

            2 FUNNELS DOWN AND UP IN CLOUD DID NOT TOUCH GROUND ALSO
            WITNESSED BY HAM RADIO OPERATOR.
0235 PM     TSTM WND DMG     3 NNE ALEXANDRIA        45.91N 95.34W
06/18/2009                   DOUGLAS            MN   TRAINED SPOTTER

            TREE DOWN
0307 PM     HAIL             2 S OSAKIS              45.84N 95.15W
06/18/2009  E0.88 INCH       DOUGLAS            MN   TRAINED SPOTTER
0308 PM     HAIL             OSAKIS                  45.87N 95.15W
06/18/2009  E0.88 INCH       DOUGLAS            MN   POST OFFICE
0315 PM     HAIL             OSAKIS                  45.87N 95.15W
06/18/2009  M0.88 INCH       DOUGLAS            MN   TRAINED SPOTTER
0330 PM     HAIL             3 NNW LITTLE SAUK       45.91N 94.94W
06/18/2009  E0.75 INCH       TODD               MN   TRAINED SPOTTER
0445 PM     HAIL             4 WNW HOLDINGFORD       45.75N 94.55W
06/18/2009  E1.50 INCH       STEARNS            MN   PUBLIC
0449 PM     HAIL             3 W MELROSE             45.68N 94.87W
06/18/2009  M0.50 INCH       STEARNS            MN   TRAINED SPOTTER
0504 PM     HAIL             2 N HOLDINGFORD         45.76N 94.47W
06/18/2009  E1.00 INCH       STEARNS            MN   TRAINED SPOTTER

            SPOTTER ON CR17
0505 PM     HAIL             HOLDINGFORD             45.73N 94.47W
06/18/2009  M1.25 INCH       STEARNS            MN   TRAINED SPOTTER
0507 PM     HAIL             HOLDINGFORD             45.73N 94.47W
06/18/2009  E1.75 INCH       STEARNS            MN   TRAINED SPOTTER

            DOWNTOWN
0512 PM     FUNNEL CLOUD     1 N ST STEPHEN          45.72N 94.28W
06/18/2009                   STEARNS            MN   TRAINED SPOTTER
0513 PM     HAIL             1 W HOLDINGFORD         45.73N 94.49W
06/18/2009  M1.00 INCH       STEARNS            MN   TRAINED SPOTTER
0516 PM     HAIL             2 W ST STEPHEN          45.70N 94.32W
06/18/2009  M1.25 INCH       STEARNS            MN   TRAINED SPOTTER
0520 PM     HAIL             ST STEPHEN              45.70N 94.28W
06/18/2009  E1.00 INCH       STEARNS            MN   TRAINED SPOTTER
0528 PM     HAIL             3 SE BOWLUS             45.79N 94.36W
06/18/2009  M1.50 INCH       MORRISON           MN   PUBLIC

            RELAYED VIA 911 CENTER
0541 PM     TSTM WND GST     RICE                    45.75N 94.23W
06/18/2009  M52.00 MPH       BENTON             MN   MESONET

            US HWY 10 MILE POST 192
0541 PM     HAIL             RICE                    45.75N 94.23W
06/18/2009  M1.75 INCH       BENTON             MN   LAW ENFORCEMENT
0558 PM     HAIL             8 E RICE                45.75N 94.06W
06/18/2009  M0.88 INCH       BENTON             MN   TRAINED SPOTTER
0607 PM     HAIL             5 N GILMAN              45.81N 93.95W
06/18/2009  M1.00 INCH       BENTON             MN   TRAINED SPOTTER
0630 PM     HAIL             6 NNW MILACA            45.84N 93.69W
06/18/2009  E1.25 INCH       MILLE LACS         MN   PUBLIC

            LASTED ABOUT TEN MINUTES. GROUND WHITE.
0707 PM     HAIL             3 NW GRASSTON           45.83N 93.20W
06/18/2009  E0.75 INCH       KANABEC            MN   TRAINED SPOTTER
0750 PM     HAIL             8 S MOTLEY              46.22N 94.64W
06/18/2009  M1.00 INCH       MORRISON           MN   TRAINED SPOTTER
0851 PM     HAIL             4 NW ELROSA             45.60N 95.01W
06/18/2009  M0.75 INCH       STEARNS            MN   TRAINED SPOTTER
0856 PM     HAIL             SAUK CENTRE             46.66N 94.95W
06/18/2009  M0.88 INCH       STEARNS            MN   TRAINED SPOTTER

            1 WEST JUNCTION HWY 71 AND HWY 28
0900 PM     HAIL             SPRING HILL             45.52N 94.83W
06/18/2009  M1.00 INCH       STEARNS            MN   PUBLIC
0922 PM     HAIL             4 S NEW MUNICH          45.57N 94.75W
06/18/2009  M1.25 INCH       STEARNS            MN   STORM CHASER

            HAIL STARTED AT 918 PM AND WAS MOSTLY 3/4 INCH...SOME
            HALF DOLLARS.
0950 PM     HAIL             COLD SPRING             45.46N 94.43W
06/18/2009  M1.00 INCH       STEARNS            MN   FIRE DEPT/RESCUE
1003 PM     HAIL             ROCKVILLE               45.47N 94.34W
06/18/2009  M0.88 INCH       STEARNS            MN   TRAINED SPOTTER
&&

$$

 

lsrmap

lsrkey

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