Very Large Hail Tuesday Night (Radar Summary, Reports, Photos)

Radar Summary
A line of intense, severe thunderstorms initiated across southwest North Dakota late Tuesday evening, moving along and south of I-94 into the early morning hours on Wednesday, a an strong low pressure system impacted the area. Multiple tennis, baseball and even softball size hail reports were received overnight. Shown below are the radar images from the begining to the end of the event.

11 PM CDT Radar

Midnight CDT Radar

1 AM CDT Radar

2 AM CDT Radar

3 AM CDT Radar

4 AM CDT Radar
Multiple Hits
Unfortunately, some locations across south central North Dakota and into the James River Valley were hit by severe storms up to three times during the night. This resulted in multiple rounds of large hail, and very heavy rains. For example, the town of Cannon Ball in northern Sioux county was hit by softball size hail at 104 am CDT, softball hail again at 221 am CDT, and finally golfball hail at 310 am CDT with broken windows reported. Shown below are the radar images from these three hits. The black circles indicate the location of the town of Cannon Ball.

Storm 1

Storm 2

Storm 3
Strongly Rotating Storms
The strength of the wind field and very humid air supported multiple rotating storms capable of producing tornadoes overnight. Shown below is an example of a strong hook echo last night, indicative of a possible tornado.
Preliminary Storm Reports

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BISMARCK ND
508 AM CDT WED JUL 14 2010

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

1130 PM     HAIL             NEW LEIPZIG             46.37N 101.95W
07/13/2010  M2.50 INCH       GRANT              ND   TRAINED SPOTTER

            STRONG WINDS.

1133 PM     HAIL             ELGIN                   46.40N 101.85W
07/13/2010  E2.00 INCH       GRANT              ND   PUBLIC

1133 PM     TSTM WND GST     ELGIN                   46.40N 101.85W
07/13/2010  E60.00 MPH       GRANT              ND   PUBLIC

            GOLFBALL SIZE HAIL.

1208 AM     HAIL             RALEIGH                 46.36N 101.31W
07/14/2010  M1.75 INCH       GRANT              ND   EMERGENCY MNGR

1208 AM     HAIL             REGENT                  46.42N 102.56W
07/14/2010  E1.00 INCH       HETTINGER          ND   TRAINED SPOTTER

1209 AM     HAIL             BOWMAN                  46.18N 103.39W
07/14/2010  E1.50 INCH       BOWMAN             ND   EMERGENCY MNGR

1214 AM     TSTM WND GST     REGENT                  46.42N 102.56W
07/14/2010  E60.00 MPH       HETTINGER          ND   LAW ENFORCEMENT

            QUARTER SIZE HAIL.

1218 AM     HAIL             REGENT                  46.42N 102.56W
07/14/2010  E1.75 INCH       HETTINGER          ND   PUBLIC

            2.25 INCHES OF RAIN.

1220 AM     HAIL             13 S RHAME              46.04N 103.65W
07/14/2010  E1.75 INCH       BOWMAN             ND   EMERGENCY MNGR

            HAIL BROKE WINDSHIELD OUT OF TRUCK.

1222 AM     HAIL             MOTT                    46.37N 102.33W
07/14/2010  E2.50 INCH       HETTINGER          ND   EMERGENCY MNGR

1224 AM     HAIL             2 S RALEIGH             46.33N 101.31W
07/14/2010  E2.75 INCH       GRANT              ND   PUBLIC

1250 AM     HAIL             NEW LEIPZIG             46.37N 101.95W
07/14/2010  E2.75 INCH       GRANT              ND   PUBLIC

1254 AM     HAIL             MOTT                    46.37N 102.33W
07/14/2010  E1.75 INCH       HETTINGER          ND   PUBLIC

0103 AM     HAIL             ELGIN                   46.40N 101.85W
07/14/2010  E4.25 INCH       GRANT              ND   PUBLIC

            BROKE WINDOWS ALL OVER TOWN.

0104 AM     HAIL             CANNON BALL             46.39N 100.59W
07/14/2010  E4.25 INCH       SIOUX              ND   PUBLIC

0106 AM     HAIL             CANNON BALL             46.39N 100.59W
07/14/2010  E2.75 INCH       SIOUX              ND   PUBLIC

            BROKE OUT WINDOWS IN HOUSE.

0118 AM     HAIL             PRAIRIE KNIGHTS RESORT  46.27N 100.64W
07/14/2010  E2.75 INCH       SIOUX              ND   LAW ENFORCEMENT

            ALSO 50 TO 60 MPH WINDS

0145 AM     HAIL             FLASHER                 46.46N 101.23W
07/14/2010  E1.00 INCH       MORTON             ND   TRAINED SPOTTER

0210 AM     HAIL             SOLEN                   46.39N 100.80W
07/14/2010  E4.25 INCH       SIOUX              ND   PUBLIC

0221 AM     HAIL             CANNON BALL             46.39N 100.59W
07/14/2010  E4.25 INCH       SIOUX              ND   PUBLIC

            BREAKING WINDOWS.

0243 AM     HAIL             1 S HAZELTON            46.47N 100.28W
07/14/2010  E1.50 INCH       EMMONS             ND   PUBLIC

0244 AM     HAIL             HAZELTON                46.48N 100.28W
07/14/2010  E1.75 INCH       EMMONS             ND   PUBLIC

            HAIL COVERED THE GROUND.

0300 AM     TSTM WND GST     MONTPELIER              46.70N 98.59W
07/14/2010  E65.00 MPH       STUTSMAN           ND   CO-OP OBSERVER

            60 TO 70 MILE PER HOUR WIND GUSTS. TORRENTIAL RAIN.

0305 AM     HAIL             KINTYRE                 46.55N 99.95W
07/14/2010  E1.00 INCH       EMMONS             ND   LAW ENFORCEMENT

0309 AM     HAIL             NAPOLEON                46.51N 99.77W
07/14/2010  E2.75 INCH       LOGAN              ND   AMATEUR RADIO

            ALSO 1.5 INCHES RAIN.

0310 AM     HAIL             CANNON BALL             46.39N 100.59W
07/14/2010  E1.75 INCH       SIOUX              ND   PUBLIC

0310 AM     HAIL             2 S NAPOLEON            46.48N 99.77W
07/14/2010  E2.75 INCH       LOGAN              ND   EMERGENCY MNGR

0310 AM     HAIL             NAPOLEON                46.51N 99.77W
07/14/2010  E1.75 INCH       LOGAN              ND   LAW ENFORCEMENT

            SOME LARGER HAIL PRESENT.

Pictures

Cannon Ball Hail (Credit KFYR Sky Spy)

Cannon Ball Hail (Credit KXMC Viewer Photos)

Elgin Hail (Credit KFYR Sky Spy)

Linton Hail (Credit KXMC Viewer Photos)


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