July 6-7, 2020 Severe Thunderstorm Summary
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Two waves of strong to severe thunderstorms rolled across portions of southeast South Dakota into extreme northeast Nebraska and northwest Iowa July 6-7, 2020. Large hail up to 3 inches in diameter, damaging wind gusts from 60 to 70 mph, and isolated flash flooding occurred with these storms. The largest hail fell near Alexandria, SD, whereas the greatest impacts from damaging straight line wind were in and around communities near the Missouri River downstream from Chamberlain, SD. In addition, isolated flash flooding occurred across parts of Douglas County, SD. |
 Thunderstorm near Vermillion, SD - Derek Thompson |
Photos
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| Snapped Tree near Yankton, SD (Amy Westrum) |
Hail in North Sioux City, SD (Pete Hawkinson) |
Flash Flooding in Armour, SD (Derek Thompson) |
Rainbow in Sioux City, IA (Scott Larson) |
Radar
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| Radar Loop: 1-7 PM July 6 | Radar Loop: 7PM July 6 - 1AM July 7 | Radar Loop: 1-7 AM July 7 |
Storm Reports
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE SIOUX FALLS SD
208 PM CDT TUE JUL 7 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0815 AM HAIL WINFRED 44.00N 97.37W
07/06/2020 E1.25 INCH LAKE SD TRAINED SPOTTER
GROUND WAS COVERED WITH QUARTER TO HALF
DOLLAR SIZED HAIL AND PONDING WATER AROUND
THE ACREAGE. RAINFALL ESTIMATED AT 1 INCH.
0815 AM FLASH FLOOD 2 N KENNETH 43.78N 96.07W
07/06/2020 ROCK MN EMERGENCY MNGR
ROCK COUNTY EM REPORTS SOME WATER OVER ROADS
NORTH OF KENNETH. LOCATION IS AN
APPROXIMATION FOR IMPACTED AREA.
0833 AM FLASH FLOOD 6 S CHANDLER 43.85N 95.93W
07/06/2020 NOBLES MN PUBLIC
RELAYED VIA NOBLES COUNTY EM. SOME WATER
OVER STATE HIGHWAY 91.
1047 AM HAIL 4 NNE ARMOUR 43.37N 98.31W
07/06/2020 E1.00 INCH DOUGLAS SD PUBLIC
LOTS OF HAIL, SOME UP TO SIZE OF QUARTERS,
BUT MOSTLY PEAS. SOME OF THE CORN AND BEANS
HAVE STRIPPED LEAVES, BUT IT IS NOT DEAD.
3.50 INCHES OF RAINFALL.
0143 PM HAIL 2 ESE FULTON 43.72N 97.79W
07/06/2020 E1.50 INCH HANSON SD TRAINED SPOTTER
HEAVY RAIN AND BRIEFLY GUSTY WINDS PRECEDED
THE LARGE HAIL.
0200 PM HAIL ALEXANDRIA 43.65N 97.78W
07/06/2020 E2.75 INCH HANSON SD LAW ENFORCEMENT
0200 PM HAIL 1 NNW ALEXANDRIA 43.66N 97.79W
07/06/2020 E1.50 INCH HANSON SD LAW ENFORCEMENT
PING PONG BALL SIZED HAIL AT THE I-90 EXIT
FOR ALEXANDRIA.
0205 PM HAIL 4 SSW TABOR 42.90N 97.69W
07/06/2020 E1.00 INCH BON HOMME SD TRAINED SPOTTER
HEAVY RAIN AND SOME WIND, BUT NO DAMAGE.
0225 PM HAIL 7 SW CLAYTON 43.38N 97.76W
07/06/2020 E1.00 INCH HUTCHINSON SD PUBLIC
REPORTED AT 42199 HWY 44 PARKSTON SD.
0242 PM HAIL 6 SW CLAYTON 43.37N 97.73W
07/06/2020 E0.70 INCH HUTCHINSON SD PUBLIC
REPORTED AT 27718 423RD AVENUE PARKSTON SD.
0248 PM HAIL 4 S CLAYTON 43.38N 97.66W
07/06/2020 E1.00 INCH HUTCHINSON SD PUBLIC
REPORTED AT 27609 427TH AVENUE FREEMAN SD.
0348 PM HAIL 6 SW SCOTLAND 43.08N 97.79W
07/06/2020 E1.25 INCH BON HOMME SD PUBLIC
REPORTED AT 29726 420TH AVVENUE SCOTLAND SD.
0418 PM TSTM WND GST 5 NE TYNDALL 43.04N 97.79W
07/06/2020 E60 MPH BON HOMME SD TRAINED SPOTTER
A COUPLE OF 4 INCH DIAMETER TREE LIMBS DOWN.
0430 PM FLASH FLOOD 8 E PARKSTON 43.39N 97.82W
07/06/2020 HUTCHINSON SD LAW ENFORCEMENT
MULTIPLE INCHES OF WATER FLOWING OVER HWY
44, WITH ROAD TEMPORARILY BLOCKED BY LAW
ENFORCEMENT.
0440 PM TSTM WND DMG 5 N YANKTON 42.96N 97.40W
07/06/2020 YANKTON SD PUBLIC
A COUPLE OF LARGE TREES TOPPLED. REPORTED AT
30546 HWY 81 YANKTON SD.
0442 PM TSTM WND GST 2 NE YANKTON 42.92N 97.37W
07/06/2020 M68 MPH YANKTON SD AWOS
AWOS STATION KYKN YANKTON MUNICIPAL AIRPORT.
0451 PM HAIL 3 NW MISSION HILL 42.95N 97.32W
07/06/2020 M0.88 INCH YANKTON SD LAW ENFORCEMENT
CROPS STRIPPED TO STEM.
0504 PM TSTM WND GST MISSION HILL 42.92N 97.28W
07/06/2020 E60 MPH YANKTON SD TRAINED SPOTTER
DIME SIZED HAIL AND HEAVY RAIN ALONG WITH
STRONG WINDS.
0510 PM TSTM WND GST 2 WSW GAYVILLE 42.88N 97.22W
07/06/2020 M66 MPH YANKTON SD MESONET
MESONET STATION 197 SD RWIS GAYVILLE.
0534 PM HAIL 5 SSW MECKLING 42.77N 97.11W
07/06/2020 E1.25 INCH CLAY SD PUBLIC
STRONG WINDS ACCOMPANIED THE HAIL, BUT NO
ESTIMATES ON STRENGTH AND NO VISIBLE DAMAGE.
0542 PM HAIL 4 S MASKELL 42.63N 96.98W
07/06/2020 E0.88 INCH DIXON NE TRAINED SPOTTER
ESTIMATED WIND GUSTS TO 50 MPH.
0551 PM TSTM WND GST MASKELL 42.69N 96.98W
07/06/2020 E60 MPH DIXON NE PUBLIC
SOME PEA SIZED HAIL ALSO.
0628 PM TSTM WND GST 1 W PONCA 42.57N 96.73W
07/06/2020 M67 MPH DIXON NE TRAINED SPOTTER
0634 PM TSTM WND GST PONCA 42.57N 96.71W
07/06/2020 E65 MPH DIXON NE TRAINED SPOTTER
PENNY-SIZED HAIL AND HEAVY RAIN IN ADDITION
TO THE STRONG WINDS.
0644 PM TSTM WND GST 1 SE NORTH SIOUX CITY 42.53N 96.49W
07/06/2020 M60 MPH UNION SD TRAINED SPOTTER
1023 PM HAIL 1 N CORSICA 43.44N 98.41W
07/06/2020 M1.25 INCH DOUGLAS SD LAW ENFORCEMENT
RECEIVED REPORT FROM LAW ENFORCEMENT, TIME
ESTIMATED FROM RADAR.
1045 PM HAIL 4 ENE KIMBALL 43.76N 98.88W
07/06/2020 M0.70 INCH BRULE SD TRAINED SPOTTER
1045 PM HAIL 4 ENE KIMBALL 43.76N 98.88W
07/06/2020 E0.88 INCH BRULE SD TRAINED SPOTTER
PILES OF HAIL UP TO NICKEL SIZED ON WEST
SIDE OF BARN AND HOUSE. LOTS OF LEAVES
STRIPPED OFF TREES. RAINFALL WAS 2.25 INCH.
1049 PM HAIL 5 ESE KIMBALL 43.73N 98.85W
07/06/2020 E1.00 INCH BRULE SD PUBLIC
HAIL AS LARGE AS QUARTERS, BUT MOSTLY
NICKLES OR SMALLER. SOME BEAN LEAVES RIPPED
UP, BUT NOT TOO BAD. NOT TOO MUCH WIND.
RAINFALL 1.60 INCHES.
1255 AM FLASH FLOOD ARMOUR 43.32N 98.34W
07/07/2020 DOUGLAS SD PUBLIC
SIDE ROADS FLOODED OVER THE CURBS IN ARMOUR,
WITH STANDING WATER OVER INTERSECTIONS ALONG
HIGHWAY 44. WATER IS SHOWN TO GET UP
ALONGSIDE BUILDINGS. REPORT WITH PHOTOS FROM
SOCIAL MEDIA.
1258 AM TSTM WND GST 3 S CHAMBERLAIN 43.77N 99.32W
07/07/2020 M61 MPH BRULE SD ASOS
ASOS STATION K9V9 CHAMBERLAIN MUNICIPAL
AIRPORT, CALLED IN AND LISTENED TO THE
MINUTE BY MINUTE OBSERVATIONS.
0104 AM TSTM WND GST 14 W PLATTE 43.39N 99.12W
07/07/2020 M72 MPH CHARLES MIX SD MESONET
MESONET STATION 154 SD RWIS PLATTE-WINNER
BRIDGE.
0118 AM TSTM WND GST 14 W PLATTE 43.39N 99.12W
07/07/2020 M64 MPH CHARLES MIX SD MESONET
MESONET STATION 154 SD RWIS PLATTE-WINNER
BRIDGE.
0140 AM TSTM WND GST 2 WSW PICKSTOWN 43.05N 98.57W
07/07/2020 M64 MPH GREGORY SD MESONET
MESONET STATION 244 SD RWIS FT. RANDALL DAM.
&&
Rain Reports
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 1027 AM CDT TUE JUL 7 2020 ...24 HOUR PRECIPITATION REPORTS... LOCATION AMOUNT TIME/DATE LAT/LON ...IOWA... ...LYON COUNTY... LARCHWOOD 1.2 NNE 1.20 IN 0800 AM 07/07 43.47N/96.43W ...PLYMOUTH COUNTY... 4.2 S HINTON 1.08 IN 1000 AM 07/07 42.57N/96.32W ...SIOUX COUNTY... SIOUX CENTER 2.6 N 0.88 IN 0700 AM 07/07 43.11N/96.18W ...WOODBURY COUNTY... 1.4 SE NORTH SIOUX CITY 1.27 IN 0900 AM 07/07 42.52N/96.48W 1.2 N SIOUX CITY 1.16 IN 1000 AM 07/07 42.52N/96.40W 1.0 E HORNICK 0.98 IN 0900 AM 07/07 42.23N/96.08W ...MINNESOTA... ...COTTONWOOD COUNTY... 2.6 NW WINDOM 0.80 IN 0900 AM 07/07 43.89N/95.16W ...LYON COUNTY... TRACY AIRPORT 1.04 IN 1015 AM 07/07 44.25N/95.62W MARSHALL MUNICIPAL AIRPORT 0.93 IN 0956 AM 07/07 44.45N/95.82W MARSHALL 0.68 IN 0800 AM 07/07 44.47N/95.79W ...MURRAY COUNTY... SLAYTON 7.1 NNW 0.80 IN 0600 AM 07/07 44.09N/95.81W ...PIPESTONE COUNTY... EDGERTON 0.2 WSW 1.27 IN 0600 AM 07/07 43.87N/96.13W EDGERTON 0.5 W 0.76 IN 0700 AM 07/07 43.88N/96.14W ...ROCK COUNTY... 0.9 NE LUVERNE 0.70 IN 0900 AM 07/07 43.67N/96.20W ...NEBRASKA... ...DAKOTA COUNTY... 1.4 N SOUTH SIOUX CITY 1.14 IN 0900 AM 07/07 42.49N/96.41W ...DIXON COUNTY... NEWCASTLE 1.93 IN 0600 AM 07/07 42.65N/96.88W ...SOUTH DAKOTA... ...AURORA COUNTY... SD RWIS PLANKINTON 3.62 IN 1013 AM 07/07 43.71N/98.58W STICKNEY 3.8 SW 3.10 IN 0700 AM 07/07 43.55N/98.49W WHITE LAKE 2.52 IN 0935 AM 07/07 43.73N/98.72W PLANKINTON 3.8 W 1.12 IN 0700 AM 07/07 43.71N/98.56W WHITE LAKE 0.66 IN 1015 AM 07/07 43.73N/98.69W ...BEADLE COUNTY... SD RWIS CAVOUR 0.54 IN 1011 AM 07/07 44.37N/97.98W ...BON HOMME COUNTY... AVON 7.5 NE 2.28 IN 0900 AM 07/07 43.09N/97.97W TYNDALL 2.14 IN 0800 AM 07/07 42.99N/97.86W SPRINGFIELD 7.6 WNW 1.32 IN 0700 AM 07/07 42.89N/98.03W ...BROOKINGS COUNTY... BRUCE 4.1 NE 1.34 IN 0700 AM 07/07 44.48N/96.84W BROOKINGS 6.5 N 0.59 IN 0700 AM 07/07 44.40N/96.81W ...BRULE COUNTY... KIMBALL 6.7 SE 3.56 IN 0700 AM 07/07 43.67N/98.87W SD RWIS KIMBALL 3.10 IN 1013 AM 07/07 43.74N/98.96W CHAMBERLAIN 7.5 NNE 2.60 IN 0700 AM 07/07 43.90N/99.25W KIMBALL 3.9 ENE 2.25 IN 0730 AM 07/07 43.76N/98.88W CHAMBERLAIN 0.3 W 2.06 IN 0530 AM 07/07 43.81N/99.33W PUKWANA 4.5 SE 1.49 IN 0800 AM 07/07 43.73N/99.12W PUKWANA 1.9 S 1.38 IN 0700 AM 07/07 43.75N/99.18W CHAMBERLAIN 7.5 SSW 1.25 IN 0545 AM 07/07 43.71N/99.38W CHAMBERLAIN MUNICIPAL AIRPOR 1.15 IN 1015 AM 07/07 43.77N/99.32W ...CHARLES MIX COUNTY... PLATTE 1.12 IN 1016 AM 07/07 43.38N/98.84W 7.6 SW PLATTE 1.07 IN 0900 AM 07/07 43.33N/98.97W LAKE ANDES RAWS 0.85 IN 0941 AM 07/07 43.26N/98.76W 3.1 W GEDDES 0.85 IN 0941 AM 07/07 43.26N/98.76W PLATTE 0.78 IN 1015 AM 07/07 43.29N/98.96W LAKE ANDES 2.4 N 0.78 IN 0531 AM 07/07 43.19N/98.54W WAGNER 0.8 NW 0.66 IN 0500 AM 07/07 43.08N/98.32W ...CLAY COUNTY... VERMILLION 1.4 SE 1.24 IN 0600 AM 07/07 42.77N/96.91W VERMILLION 0.6 SE 1.11 IN 0800 AM 07/07 42.77N/96.92W VERMILLION 1.9 N 1.01 IN 0640 AM 07/07 42.81N/96.92W 2.4 N VERMILLION 0.52 IN 0900 AM 07/07 42.82N/96.92W ...DAVISON COUNTY... MITCHELL 7.3 S 0.67 IN 0700 AM 07/07 43.63N/98.01W MITCHELL 3.5 S 0.63 IN 0700 AM 07/07 43.68N/98.03W MITCHELL 1.0 SE 0.62 IN 0700 AM 07/07 43.72N/98.02W MITCHELL 3.4 SSE 0.60 IN 0800 AM 07/07 43.69N/98.00W MITCHELL 0.9 SSE 0.57 IN 0700 AM 07/07 43.72N/98.03W MITCHELL MUNICIPAL AIRPORT 0.56 IN 1014 AM 07/07 43.77N/98.04W 5 N MT VERNON 0.53 IN 0900 AM 07/07 43.77N/98.25W ...DOUGLAS COUNTY... CORSICA 2.8 SSW 3.88 IN 0700 AM 07/07 43.39N/98.42W DIMOCK 10.2 W 3.16 IN 0700 AM 07/07 43.50N/98.19W ARMOUR 4.6 W 3.16 IN 0700 AM 07/07 43.33N/98.44W CORSICA 0.1 SSE 3.15 IN 0800 AM 07/07 43.42N/98.41W CORSICA 4.3 W 2.89 IN 0800 AM 07/07 43.43N/98.49W ...GREGORY COUNTY... HERRICK 8.2 SSW 1.33 IN 0700 AM 07/07 43.00N/99.23W BURKE 4.2 SW 1.18 IN 0700 AM 07/07 43.14N/99.35W BURKE 10.5 SSE 1.12 IN 0700 AM 07/07 43.04N/99.23W BUTTE 8NNW 1.06 IN 1015 AM 07/07 43.02N/98.90W DALLAS 8.8 S 0.99 IN 0700 AM 07/07 43.11N/99.50W HERRICK 4.5 NW 0.86 IN 0700 AM 07/07 43.16N/99.26W GREGORY 0.81 IN 0700 AM 07/07 43.24N/99.43W GREGORY 8.7 N 0.67 IN 0700 AM 07/07 43.36N/99.42W GREGORY 4.3 E 0.64 IN 0700 AM 07/07 43.24N/99.34W SD RWIS FT. RANDALL DAM 0.61 IN 1013 AM 07/07 43.05N/98.57W PICKSTOWN 4 SSW 0.58 IN 0700 AM 07/07 43.02N/98.56W ...HANSON COUNTY... SD RWIS ALEXANDRIA 3.62 IN 1012 AM 07/07 43.67N/97.71W ALEXANDRIA 0.4 WNW 1.02 IN 0700 AM 07/07 43.66N/97.79W ALEXANDRIA 6.4 N 1.00 IN 0700 AM 07/07 43.75N/97.79W ...HUTCHINSON COUNTY... SD RWIS TRIPP 3.27 IN 1011 AM 07/07 43.24N/97.99W PARKSTON 6.5 WSW 1.56 IN 0700 AM 07/07 43.37N/98.11W EMERY 10.8 S 1.35 IN 0600 AM 07/07 43.45N/97.66W PARKSTON 6.6 S 1.01 IN 0700 AM 07/07 43.30N/97.99W 4.3 SE OLIVET 0.66 IN 0945 AM 07/07 43.19N/97.64W PARKSTON 0.53 IN 1015 AM 07/07 43.38N/97.99W ...JERAULD COUNTY... WESSINGTON SPRINGS 9.3 SSW 1.58 IN 0700 AM 07/07 43.95N/98.62W ...KINGSBURY COUNTY... DE SMET 0.2 SSE 0.86 IN 0700 AM 07/07 44.38N/97.55W ...LAKE COUNTY... MADISON 5.0 SE 0.97 IN 0800 AM 07/07 43.95N/97.05W MADISON 0.2 NW 0.68 IN 0700 AM 07/07 44.01N/97.11W ...MCCOOK COUNTY... MONTROSE 5.8 NW 1.94 IN 0700 AM 07/07 43.77N/97.25W SD RWIS MONTROSE 1.38 IN 1012 AM 07/07 43.67N/97.15W MONTROSE 0.80 IN 0700 AM 07/07 43.70N/97.18W BRIDGEWATER 0.60 IN 0800 AM 07/07 43.55N/97.50W ...MINNEHAHA COUNTY... GARRETSON 4.2 SSE 1.30 IN 0700 AM 07/07 43.66N/96.47W COLTON 3.8 S 1.17 IN 0600 AM 07/07 43.73N/96.94W GARRETSON 0.5 SW 1.17 IN 0700 AM 07/07 43.71N/96.51W GARRETSON 1.7 WSW 1.02 IN 0700 AM 07/07 43.71N/96.53W RENNER 4.1 NW 0.93 IN 0700 AM 07/07 43.69N/96.78W HARTFORD 2.7 NNE 0.79 IN 0700 AM 07/07 43.66N/96.92W SD RWIS DELL RAPIDS 0.72 IN 1013 AM 07/07 43.82N/96.78W 5.9 W GARRETSON 0.71 IN 0800 AM 07/07 43.74N/96.61W 2.3 SW CROOKS 0.61 IN 0900 AM 07/07 43.63N/96.83W ...MOODY COUNTY... DELL RAPIDS 6.2 NW 1.35 IN 0700 AM 07/07 43.88N/96.81W 7.7 SW AURORA 0.59 IN 0900 AM 07/07 44.18N/96.75W ...UNION COUNTY... SD RWIS NORTH SIOUX CITY 2.22 IN 1011 AM 07/07 42.57N/96.53W JEFFERSON 2.9 SW 1.62 IN 0700 AM 07/07 42.58N/96.61W JEFFERSON 4.9 S 1.30 IN 0700 AM 07/07 42.53N/96.57W JEFFERSON 2.1 WNW 1.29 IN 0700 AM 07/07 42.62N/96.60W JEFFERSON 1.1 E 0.78 IN 0519 AM 07/07 42.60N/96.54W ...YANKTON COUNTY... SD RWIS GAYVILLE 3.49 IN 1012 AM 07/07 42.88N/97.22W YANKTON MUNICIPAL AIRPORT 2.23 IN 0956 AM 07/07 42.92N/97.37W YANKTON 2 E 2.11 IN 0630 AM 07/07 42.88N/97.36W YANKTON 4.1 SW 0.88 IN 0640 AM 07/07 42.85N/97.45W OBSERVATIONS ARE COLLECTED FROM A VARIETY OF SOURCES WITH VARYING EQUIPMENT AND EXPOSURES. WE THANK ALL VOLUNTEER WEATHER OBSERVERS FOR THEIR DEDICATION. NOT ALL DATA LISTED ARE CONSIDERED OFFICIAL. $$
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