Lift associated with a jet streak across southern North Dakota interacted with an unstable and weakly capped environment with 30 to 40 knots of deep-layer shear to produce a couple of smaller clusters of thunderstorms with large hail and damaging wind during the evening and overnight which progressed east and southeast across southeast South Dakota. The final cluster was a larger-scale bowing…
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FSD wrote it up.
Lift associated with a jet streak across southern North Dakota interacted with an unstable and weakly capped environment with 30 to 40 knots of deep-layer shear to produce a couple of smaller clusters of thunderstorms with large hail and damaging wind during the evening and overnight which progressed east and southeast across southeast South Dakota. The final cluster was a larger-scale bowing segment which produced damaging wind gusts across south central South Dakota. Repeated storms with heavy rainfall resulted in spotty flash flooding.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Jul 6, 11:43 AM CST, 1 hour earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1243 PM CDT Mon Jul 6 2020 .UPDATE... Issued at 1112 AM CDT Mon Jul 6 2020 Challenging forecast ahead for the next 12 to 18 hours. Convection diminishing this morning with one small cluster still going near I-90 in southwest MN. This is in response to a weak wave moving through eastern SD and this wave could spark a few thunderstorms again this afternoon, with the better chances north of I-90 and east of De Smet. There is some question on the atmosphere destabilizing enough this afternoon to get more storms going. Likely looking at CAPE around 2000 J/kg with deep shear about 20 knots and little to no directional shear in the low levels. With low level inflow from the southwest if storms can get going along and north of highway 14 east of Brookings they would likely build southwest into the evening. While some isolated severe storms will be possible the freezing level is around 13000 feet so once again heavy rain will likely play a role. Will keep an eye on trends for this activity as a flash flood watch may be needed in southwest MN and parts of eastern SD with saturated ground from some heavier overnight rain. Also watching an upper level wave in southeast MT which should move into SD later tonight and bring a good chance for a cluster of storms into central SD around and after 3z. While instability will be a little less, likely 1500 to 2000 J/kg, the mid and upper level shear will increase to 30 to 40 knots and may support a slightly more organized linear system. Shear is mostly unidirectional but there is a little turning in the 900 mb to 800 mb layer. The 0-3 km shear vector is about 30 knots and from about 270 degrees so if we do see a linear system will have to keep a close eye on any accelerations within the portion of the line that is moving due east. && .SHORT TERM...(Today and Tonight) Issued at 410 AM CDT Mon Jul 6 2020 Active forecast today with a series of disturbances moving through the forecast area leading to rounds of convection. As of 08Z, complex of thunderstorms across southwest Minnesota associated with warm air advection ahead of shortwave/MCV over central South Dakota. Expect this round to work east of the forecast area this morning with minimal severe weather threat. Early morning convection could kick out an outflow boundary or two, which will need to be monitored closely throughout the day as this will likely be a focusing mechanism for additional rounds of convection later in the day as short waves continue to train across the area. With ample clearing and surface heating this morning, models are suggesting 2000- 2500 J/kg of surface based CAPE by early afternoon with only a weakly capped environment. Jet dynamics are concentrated to the north across North Dakota; however, 0-6 km bulk shear increases through the day towards 30-40 knots west of I-29 by 00Z Tuesday. CAMs have suggested two schools of thought for today. The first suggests convection will continue to backbuild through the day along lingering boundary gradually working south through the day. Corfidi vectors suggest storms will be moving east at 20-25 knots, so there should be enough movement to limit heavy rain potential unless storms are able to train along the boundary. With precipitable water values 1.5-1.6 inches (~90 percent of the moving average), certainly dealing with the potential for heavy rain. However, warm cloud depths are only 7500-8000 feet thick, limiting the efficiency some. WPC has outlined the area in marginal threat for excessive rainfall which seems reasonable based on the above parameters. The second camp of CAM solutions suggests the next round of storm development will hold off till later in the day as a series of shortwaves move across the Dakotas. The trajectory of the shortwaves look to be focused across the northern half of South Dakota, so expect convective initiation to be north of I-90, building south with time. Am expecting storms to be organized in clusters that may at times try to evolve into convective lines. With fair amount of dry air in the mid levels, downdraft CAPE values approach 1500-2000 J/kg by late this afternoon, with the highest values south of I-90. If storms are able to hold off till later in the day, hail threat may also be greater as storms will have more shear to organize and develop mid level rotation. With only weakly capped environment, boundaries lingering around and additional midlevel waves passing through the region, could see additional rounds of convection on Monday night into Tuesday. .LONG TERM...(Tuesday through Sunday) Issued at 410 AM CDT Mon Jul 6 2020 With upper level ridge expected to develop across the desert southwest and a series of ridge riders expected to move across the northern half of the US, expect warm and sultry conditions to continue this week with periodic chances for thunderstorms. With active weather in the short term, left the blend as is in the extended. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 1243 PM CDT Mon Jul 6 2020 Challenging forecast as it relates to thunderstorm chances through the period. Will be watching for possible development along the Hwy 14 corridor later this afternoon and some of this activity could build southwestward, impacting KFSD in the 06.22Z to 07.02Z period. Otherwise, better chances will occur later this evening and overnight as a wave aloft moves across the region. Will handle this threat with VCTS for now and allow later forecasts to fine- tune timing and airfield impacts. MVFR conditions (lower ceiling/ visibility) possible with any stronger storms that develop. Frequent updates/amendments are possible later this afternoon and evening as convective picture becomes clearer. Winds away from thunderstorms will be light and variable. If there is a directional preference, it will be from the south-southeast through the period...generally 10 kts or less. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && UPDATE...08 SHORT TERM...BT LONG TERM...BT AVIATION...Rogers
Hazardous Weather Outlook National Weather Service Sioux Falls SD 524 AM CDT Mon Jul 6 2020 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-071030- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory- Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 524 AM CDT Mon Jul 6 2020 This Hazardous Weather Outlook is for northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. Thunderstorms are possible this morning. A few of the stronger storms may produce gusty winds to 50 mph. Additional thunderstorms are expected after 2 PM this afternoon. Some of these storms may produce hail to the size of half dollars, and wind gusts to 65 mph. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Heat index values are expected to climb into the 90s each afternoon this week. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed after 2 pm today.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
843 AM CDT MON JUL 6 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.
&&
TRMPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
846 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0833 AM HEAVY RAIN 5 SE EDGERTON 43.83N 96.05W
07/06/2020 M5.25 INCH ROCK MN PUBLIC
RELAYED VIA NOBLES COUNTY EM.
0833 AM HEAVY RAIN 5 E EDGERTON 43.86N 96.02W
07/06/2020 M3.75 INCH MURRAY MN PUBLIC
RELAYED VIA NOBLES COUNTY EM.
0833 AM HEAVY RAIN 5 NE KENNETH 43.81N 96.01W
07/06/2020 M4.00 INCH NOBLES MN PUBLIC
RELAYED VIA NOBLES COUNTY EM.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1146 AM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1136 AM HEAVY RAIN 4 S HARDWICK 43.72N 96.19W
07/06/2020 E4.90 INCH ROCK MN PUBLIC
ESTIMATED RAINFALL AT BLUE MOUNDS STATE PARK
OFFICE.
1128 AM HEAVY RAIN STORDEN 44.03N 95.33W
07/06/2020 M0.90 INCH COTTONWOOD MN MESONET
MESONET STATION FW0422 STORDEN.
1125 AM HEAVY RAIN LAKEFIELD 43.68N 95.18W
07/06/2020 M0.81 INCH JACKSON MN MESONET
MESONET STATION FW2295 LAKEFIELD.
1125 AM HEAVY RAIN 3 SE BALTIC 43.73N 96.68W
07/06/2020 M0.97 INCH MINNEHAHA SD MESONET
MESONET STATION BTCS2 BALTIC.
1125 AM HEAVY RAIN 2 ESE COLTON 43.77N 96.89W
07/06/2020 M0.63 INCH MINNEHAHA SD MESONET
MESONET STATION CTNS2 COLTON.
1124 AM HEAVY RAIN 3 SE MONTROSE 43.67N 97.15W
07/06/2020 M1.54 INCH MCCOOK SD MESONET
MESONET STATION 18 SD RWIS MONTROSE.
1124 AM HEAVY RAIN 4 ESE FORESTBURG 44.01N 98.03W
07/06/2020 M0.60 INCH SANBORN SD MESONET
MESONET STATION 6 SD RWIS FORESTBURG.
1124 AM HEAVY RAIN 3 E CAVOUR 44.37N 97.98W
07/06/2020 M2.06 INCH BEADLE SD MESONET
MESONET STATION 211 SD RWIS CAVOUR.
1124 AM HEAVY RAIN 3 NNW WOLSEY 44.46N 98.50W
07/06/2020 M0.52 INCH BEADLE SD MESONET
MESONET STATION 164 SD RWIS WOLSEY.
1124 AM HEAVY RAIN 10 SSW AURORA 44.15N 96.76W
07/06/2020 M0.68 INCH MOODY SD MESONET
MESONET STATION 224 SD RWIS WARD.
1124 AM HEAVY RAIN 4 ENE ALEXANDRIA 43.67N 97.71W
07/06/2020 M0.94 INCH HANSON SD MESONET
MESONET STATION 213 SD RWIS ALEXANDRIA.
1122 AM HEAVY RAIN 3 W DELL RAPIDS 43.82N 96.78W
07/06/2020 M2.61 INCH MINNEHAHA SD MESONET
MESONET STATION 17 SD RWIS DELL RAPIDS.
1122 AM HEAVY RAIN 1 S KIMBALL 43.74N 98.96W
07/06/2020 M1.07 INCH BRULE SD MESONET
MESONET STATION 25 SD RWIS KIMBALL.
1121 AM HEAVY RAIN ORLEANS 43.44N 95.11W
07/06/2020 M1.25 INCH DICKINSON IA PUBLIC
REPORT VIA SOCIAL MEDIA.
1118 AM HEAVY RAIN 1 NNE SIOUX CENTER 43.08N 96.16W
07/06/2020 M0.94 INCH SIOUX IA MESONET
MESONET STATION AR437 SIOUX CENTER.
1116 AM HEAVY RAIN 2 NW HARTLEY 43.20N 95.50W
07/06/2020 M1.02 INCH O'BRIEN IA MESONET
MESONET STATION EW7617 HARTLEY.
1116 AM HEAVY RAIN 3 WSW LUVERNE 43.64N 96.26W
07/06/2020 M3.75 INCH ROCK MN MESONET
MESONET STATION FW5856 LUVERNE.
1116 AM HEAVY RAIN 1 SSE SIOUX CENTER 43.06N 96.17W
07/06/2020 M0.61 INCH SIOUX IA MESONET
MESONET STATION EW2631 SIOUX CENTER.
1115 AM HEAVY RAIN 3 SSE LAKE PARK 43.40N 95.31W
07/06/2020 M0.57 INCH DICKINSON IA MESONET
MESONET STATION AS497 LAKE PARK.
1115 AM HEAVY RAIN 1 N TRACY 44.25N 95.62W
07/06/2020 M1.05 INCH LYON MN AWOS
AWOS STATION KTKC TRACY AIRPORT.
1115 AM HEAVY RAIN 1 SSE ROCK RAPIDS 43.42N 96.16W
07/06/2020 M1.43 INCH LYON IA CO-OP OBSERVER
CO-OP OBSERVER STATION RAPI4 0.5 S ROCK
RAPIDS.
1115 AM HEAVY RAIN 2 N ADRIAN 43.66N 95.93W
07/06/2020 M3.54 INCH NOBLES MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1113 AM HEAVY RAIN 1 N COLTON 43.80N 96.93W
07/06/2020 M1.60 INCH MINNEHAHA SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1113 AM HEAVY RAIN 1 WSW SLAYTON 43.98N 95.78W
07/06/2020 M0.51 INCH MURRAY MN AWOS
AWOS STATION KDVP SLAYTON MUNICIPAL AIRPORT.
1111 AM HEAVY RAIN PIPESTONE 44.00N 96.31W
07/06/2020 E2.40 INCH PIPESTONE MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1104 AM HEAVY RAIN 5 NNE KENNETH 43.82N 96.02W
07/06/2020 M5.20 INCH NOBLES MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1104 AM HEAVY RAIN DELL RAPIDS 43.82N 96.71W
07/06/2020 M1.20 INCH MINNEHAHA SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1103 AM HEAVY RAIN 1 NNE SIOUX CENTER 43.08N 96.16W
07/06/2020 M0.94 INCH SIOUX IA MESONET
MESONET STATION AR437 SIOUX CENTER.
1103 AM HEAVY RAIN STORDEN 44.03N 95.33W
07/06/2020 M0.89 INCH COTTONWOOD MN MESONET
MESONET STATION FW0422 STORDEN.
1101 AM HEAVY RAIN 3 WSW LUVERNE 43.64N 96.26W
07/06/2020 M3.60 INCH ROCK MN MESONET
MESONET STATION FW5856 LUVERNE.
1101 AM HEAVY RAIN 2 NW HARTLEY 43.20N 95.50W
07/06/2020 M1.02 INCH O'BRIEN IA MESONET
MESONET STATION EW7617 HARTLEY.
1100 AM HEAVY RAIN 1 SSE SIOUX CENTER 43.06N 96.17W
07/06/2020 M0.61 INCH SIOUX IA MESONET
MESONET STATION EW2631 SIOUX CENTER.
1100 AM HEAVY RAIN 3 SSE LAKE PARK 43.40N 95.31W
07/06/2020 M0.57 INCH DICKINSON IA MESONET
MESONET STATION AS497 LAKE PARK.
1100 AM HEAVY RAIN 5 SSW JASPER 43.78N 96.44W
07/06/2020 M2.24 INCH ROCK MN MESONET
MESONET STATION JSPM5 2.3 NE SHERMAN.
1100 AM HEAVY RAIN 2 ESE COLTON 43.77N 96.89W
07/06/2020 M0.63 INCH MINNEHAHA SD MESONET
MESONET STATION CTNS2 COLTON.
1100 AM HEAVY RAIN 3 SE BALTIC 43.73N 96.68W
07/06/2020 M0.97 INCH MINNEHAHA SD MESONET
MESONET STATION BTCS2 BALTIC.
1100 AM HEAVY RAIN 6 ESE BALTIC 43.73N 96.62W
07/06/2020 M4.65 INCH MINNEHAHA SD MESONET
MESONET STATION SUFS2 SIOUX FALLS 14NNE.
1100 AM HEAVY RAIN 3 NW WINDOM 43.89N 95.16W
07/06/2020 M0.78 INCH COTTONWOOD MN CO-OP OBSERVER
CO-OP OBSERVER STATION WDOM5 2.6 NW WINDOM.
1059 AM HEAVY RAIN 4 ESE FORESTBURG 44.01N 98.03W
07/06/2020 M0.60 INCH SANBORN SD MESONET
MESONET STATION 6 SD RWIS FORESTBURG.
1059 AM HEAVY RAIN 3 SE MONTROSE 43.67N 97.15W
07/06/2020 M1.33 INCH MCCOOK SD MESONET
MESONET STATION 18 SD RWIS MONTROSE.
1059 AM HEAVY RAIN 3 NNW WOLSEY 44.46N 98.50W
07/06/2020 M0.52 INCH BEADLE SD MESONET
MESONET STATION 164 SD RWIS WOLSEY.
1059 AM HEAVY RAIN 3 E CAVOUR 44.37N 97.98W
07/06/2020 M2.06 INCH BEADLE SD MESONET
MESONET STATION 211 SD RWIS CAVOUR.
1059 AM HEAVY RAIN 10 SSW AURORA 44.15N 96.76W
07/06/2020 M0.68 INCH MOODY SD MESONET
MESONET STATION 224 SD RWIS WARD.
1059 AM HEAVY RAIN 4 ENE ALEXANDRIA 43.67N 97.71W
07/06/2020 M0.94 INCH HANSON SD MESONET
MESONET STATION 213 SD RWIS ALEXANDRIA.
1056 AM HEAVY RAIN 1 W MARSHALL 44.45N 95.82W
07/06/2020 M0.46 INCH LYON MN AWOS
AWOS STATION KMML MARSHALL MUNICIPAL
AIRPORT.
1056 AM HEAVY RAIN 2 ENE WORTHINGTON 43.63N 95.57W
07/06/2020 M1.53 INCH NOBLES MN AWOS
AWOS STATION KOTG WORTHINGTON AIRPORT.
1055 AM HEAVY RAIN 1 S KIMBALL 43.74N 98.96W
07/06/2020 M1.07 INCH BRULE SD MESONET
MESONET STATION 25 SD RWIS KIMBALL.
1055 AM HEAVY RAIN 3 W DELL RAPIDS 43.82N 96.78W
07/06/2020 M2.35 INCH MINNEHAHA SD MESONET
MESONET STATION 17 SD RWIS DELL RAPIDS.
1055 AM HEAVY RAIN 3 W ARCO 44.39N 96.24W
07/06/2020 M0.53 INCH LINCOLN MN MESONET
MESONET STATION AT653 IVANHOE.
1055 AM HEAVY RAIN LAKEFIELD 43.68N 95.18W
07/06/2020 M0.81 INCH JACKSON MN MESONET
MESONET STATION FW2295 LAKEFIELD.
1055 AM HEAVY RAIN 1 N TRACY 44.25N 95.62W
07/06/2020 M1.05 INCH LYON MN AWOS
AWOS STATION KTKC TRACY AIRPORT.
1055 AM HEAVY RAIN 2 S PIPESTONE 43.97N 96.32W
07/06/2020 M0.65 INCH PIPESTONE MN AWOS
AWOS STATION KPQN PIPESTONE AIRPORT.
1054 AM HEAVY RAIN 1 WSW SLAYTON 43.98N 95.78W
07/06/2020 M0.51 INCH MURRAY MN AWOS
AWOS STATION KDVP SLAYTON MUNICIPAL AIRPORT.
1050 AM HEAVY RAIN 1 N JACKSON 43.64N 94.99W
07/06/2020 M0.90 INCH JACKSON MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1044 AM HEAVY RAIN HULL 43.19N 96.13W
07/06/2020 M0.75 INCH SIOUX IA PUBLIC
REPORT VIA SOCIAL MEDIA.
1038 AM HEAVY RAIN ELLSWORTH 43.52N 96.02W
07/06/2020 M3.20 INCH NOBLES MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1031 AM HEAVY RAIN COLTON 43.79N 96.93W
07/06/2020 M1.80 INCH MINNEHAHA SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1031 AM HEAVY RAIN 4 ESE SIOUX FALLS 43.51N 96.65W
07/06/2020 M0.75 INCH MINNEHAHA SD CO-OP OBSERVER
CO-OP OBSERVER STATION HMDS2 SIOUX FALLS
HARMONDON PARK.
1028 AM HEAVY RAIN 2 S MARSHALL 44.42N 95.79W
07/06/2020 M0.94 INCH LYON MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1027 AM HEAVY RAIN WORTHINGTON 43.63N 95.60W
07/06/2020 M2.10 INCH NOBLES MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1024 AM HEAVY RAIN 3 SW WOODSTOCK 43.98N 96.14W
07/06/2020 M2.27 INCH PIPESTONE MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1023 AM HEAVY RAIN JACKSON 43.62N 94.99W
07/06/2020 E3.00 INCH JACKSON MN PUBLIC
REPORT VIA SOCIAL MEDIA.
1021 AM HEAVY RAIN 2 N PIPESTONE 44.03N 96.32W
07/06/2020 M1.45 INCH PIPESTONE MN CO-OP OBSERVER
CO-OP OBSERVER STATION RPPM5 2.1 N
PIPESTONE.
1021 AM HEAVY RAIN 1 NNW PIPESTONE 44.01N 96.32W
07/06/2020 M1.45 INCH PIPESTONE MN MESONET
MESONET STATION RPPM5 REDSTONE RAWS.
1015 AM HEAVY RAIN 4 SSE HARDWICK 43.72N 96.16W
07/06/2020 M1.05 INCH ROCK MN MESONET
MESONET STATION HRDM5 4.3 SE HARDWICK.
1000 AM HEAVY RAIN 1 NNW PIPESTONE 44.01N 96.33W
07/06/2020 M2.70 INCH PIPESTONE MN CO-OP OBSERVER
CO-OP OBSERVER STATION PIPM5 PIPESTONE.
1000 AM HEAVY RAIN 1 SW CHESTER 43.89N 96.94W
07/06/2020 M2.20 INCH LAKE SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1000 AM HEAVY RAIN 3 NW WINDOM 43.89N 95.16W
07/06/2020 M0.79 INCH COTTONWOOD MN CO-OP OBSERVER
CO-OP OBSERVER STATION WDOM5 2.6 NW WINDOM.
1000 AM HEAVY RAIN RUSSELL 44.32N 95.95W
07/06/2020 M1.31 INCH LYON MN MESONET
MESONET STATION RUSM5 RUSSELL.
1000 AM HEAVY RAIN 1 NNE ROCK VALLEY 43.21N 96.29W
07/06/2020 M0.57 INCH SIOUX IA MESONET
MESONET STATION RKVI4 0.7 N ROCK VALLEY.
1000 AM HEAVY RAIN 1 SSE ROCK RAPIDS 43.42N 96.16W
07/06/2020 M1.61 INCH LYON IA CO-OP OBSERVER
CO-OP OBSERVER STATION RAPI4 0.5 S ROCK
RAPIDS.
1000 AM HEAVY RAIN 1 NNE LUVERNE 43.67N 96.20W
07/06/2020 M3.19 INCH ROCK MN CO-OP OBSERVER
CO-OP OBSERVER STATION LUVM5 0.9 NE LUVERNE.
1000 AM HEAVY RAIN 5 SSW JASPER 43.78N 96.44W
07/06/2020 M1.18 INCH ROCK MN MESONET
MESONET STATION JSPM5 2.3 NE SHERMAN.
1000 AM HEAVY RAIN 6 E FLANDREAU 44.06N 96.49W
07/06/2020 M1.36 INCH MOODY SD CO-OP OBSERVER
CO-OP OBSERVER STATION FCRS2 6.6 S WARD.
1000 AM HEAVY RAIN 8 SSW AURORA 44.18N 96.75W
07/06/2020 M0.85 INCH MOODY SD CO-OP OBSERVER
CO-OP OBSERVER STATION BRKS2 7.7 SW AURORA.
0951 AM HEAVY RAIN 5 ESE CROOKS 43.62N 96.72W
07/06/2020 M0.64 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-92 SIOUX FALLS 5.5 N.
0930 AM HEAVY RAIN 2 NW ORLEANS 43.47N 95.12W
07/06/2020 M0.69 INCH DICKINSON IA MESONET
MESONET STATION SLKI4 2.1 NW ORLEANS.
0930 AM HEAVY RAIN 4 SSE FORESTBURG 43.97N 98.07W
07/06/2020 M0.53 INCH SANBORN SD CO-OP OBSERVER
CO-OP OBSERVER STATION FORS2 3.8 SE
FORESTBURG.
0900 AM HEAVY RAIN 6 WNW GARRETSON 43.74N 96.61W
07/06/2020 M0.71 INCH MINNEHAHA SD CO-OP OBSERVER
CO-OP OBSERVER STATION EROS2 5.9 W
GARRETSON.
0900 AM HEAVY RAIN 7 E AVOCA 43.95N 95.51W
07/06/2020 M2.48 INCH MURRAY MN MESONET
MESONET STATION AVOM5 7.5 S DOVRAY.
0900 AM HEAVY RAIN 6 W PIPESTONE 43.99N 96.43W
07/06/2020 M3.53 INCH PIPESTONE MN MESONET
MESONET STATION PSTM5 6.0 NW IHLEN.
0900 AM HEAVY RAIN 5 N PIPESTONE 44.08N 96.33W
07/06/2020 M2.66 INCH PIPESTONE MN MESONET
MESONET STATION PSNM5 5.3 N PIPESTONE.
0900 AM HEAVY RAIN 1 SSE MADISON 43.99N 97.09W
07/06/2020 M1.15 INCH LAKE SD CO-OP OBSERVER
CO-OP OBSERVER STATION MRFS2 MADISON 2SE.
0845 AM HEAVY RAIN 3 N ROCK RAPIDS 43.47N 96.16W
07/06/2020 M2.37 INCH LYON IA COCORAHS
COCORAHS STATION IA-LY-6 ROCK RAPIDS 3.0 N.
0839 AM HEAVY RAIN 1 NE SIOUX CENTER 43.08N 96.17W
07/06/2020 M0.94 INCH SIOUX IA PUBLIC
0800 AM HEAVY RAIN 1 SSW HOWARD 44.00N 97.53W
07/06/2020 M1.28 INCH MINER SD COCORAHS
COCORAHS STATION SD-MN-17 HOWARD 0.7 SSW.
0800 AM HEAVY RAIN 4 NNE LESTER 43.49N 96.30W
07/06/2020 M1.07 INCH LYON IA COCORAHS
COCORAHS STATION IA-LY-10 ROCK RAPIDS 7.7
WNW.
0800 AM HEAVY RAIN LAKE PARK 43.45N 95.33W
07/06/2020 M0.54 INCH DICKINSON IA COCORAHS
COCORAHS STATION IA-DK-6 LAKE PARK 0.2 N.
0800 AM HEAVY RAIN HILLS 43.53N 96.36W
07/06/2020 M1.26 INCH ROCK MN COCORAHS
COCORAHS STATION MN-RK-5 HILLS 0.2 NW.
0800 AM HEAVY RAIN 3 N SIOUX CENTER 43.11N 96.18W
07/06/2020 M0.86 INCH SIOUX IA PUBLIC
0800 AM HEAVY RAIN 9 N FULTON 43.86N 97.79W
07/06/2020 M0.81 INCH MINER SD COCORAHS
COCORAHS STATION SD-MN-1 FULTON 9.4 N.
0800 AM HEAVY RAIN 4 NE TEA 43.48N 96.77W
07/06/2020 M0.50 INCH LINCOLN SD COCORAHS
COCORAHS STATION SD-LN-28 SIOUX FALLS 4.6
SSW.
0730 AM HEAVY RAIN FLANDREAU 44.05N 96.60W
07/06/2020 M0.55 INCH MOODY SD CO-OP OBSERVER
CO-OP OBSERVER STATION FLAS2 FLANDREAU.
0725 AM HEAVY RAIN 2 SW WORTHINGTON 43.61N 95.63W
07/06/2020 M1.73 INCH NOBLES MN COCORAHS
COCORAHS STATION MN-NB-7 WORTHINGTON 1.9 SW.
0723 AM HEAVY RAIN 10 N FULTON 43.86N 97.79W
07/06/2020 M0.81 INCH MINER SD CO-OP OBSERVER
CO-OP OBSERVER STATION FDRS2 FEDORA 10 S.
0700 AM HEAVY RAIN 4 SSE SIOUX FALLS 43.49N 96.71W
07/06/2020 M0.52 INCH LINCOLN SD COCORAHS
COCORAHS STATION SD-LN-32 SIOUX FALLS 3.6
SSE.
0700 AM HEAVY RAIN 2 W WORTHING 43.33N 96.80W
07/06/2020 M0.77 INCH LINCOLN SD COCORAHS
COCORAHS STATION SD-LN-19 WORTHING 2.0 W.
0700 AM HEAVY RAIN MADISON 44.01N 97.11W
07/06/2020 M0.56 INCH LAKE SD COCORAHS
COCORAHS STATION SD-LK-9 MADISON 0.2 NW.
0700 AM HEAVY RAIN 2 NE FULTON 43.75N 97.79W
07/06/2020 M0.53 INCH HANSON SD COCORAHS
COCORAHS STATION SD-HN-8 ALEXANDRIA 6.4 N.
0700 AM HEAVY RAIN 7 WSW HITCHCOCK 44.58N 98.54W
07/06/2020 M0.60 INCH BEADLE SD COCORAHS
COCORAHS STATION SD-BD-9 HITCHCOCK 7.5 WSW.
0700 AM HEAVY RAIN 7 NNE HURON 44.46N 98.17W
07/06/2020 M0.69 INCH BEADLE SD COCORAHS
COCORAHS STATION SD-BD-7 HURON 6.8 NNE.
0700 AM HEAVY RAIN WESSINGTON SPRINGS 44.08N 98.57W
07/06/2020 M0.78 INCH JERAULD SD CO-OP OBSERVER
CO-OP OBSERVER STATION WSPS2 WESSINGTON
SPRINGS.
0700 AM HEAVY RAIN 6 E IVANHOE 44.46N 96.14W
07/06/2020 M0.74 INCH LINCOLN MN COCORAHS
COCORAHS STATION MN-LN-2 IVANHOE 5.7 E.
0700 AM HEAVY RAIN 4 N CURRIE 44.13N 95.68W
07/06/2020 M1.66 INCH MURRAY MN COCORAHS
COCORAHS STATION MN-MY-5 TRACY 7.8 SSW.
0700 AM HEAVY RAIN 4 S WORTHINGTON 43.57N 95.61W
07/06/2020 M1.73 INCH NOBLES MN COCORAHS
COCORAHS STATION MN-NB-8 WORTHINGTON 4.0 S.
0700 AM HEAVY RAIN 1 WNW EDGERTON 43.88N 96.14W
07/06/2020 M2.77 INCH PIPESTONE MN COCORAHS
COCORAHS STATION MN-PS-1 EDGERTON 0.5 W.
0700 AM HEAVY RAIN 3 ESE SIOUX FALLS 43.52N 96.67W
07/06/2020 M0.52 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-1 SIOUX FALLS 5.0 SE
ARPT.
0700 AM HEAVY RAIN 3 ESE SIOUX FALLS 43.53N 96.67W
07/06/2020 M0.63 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-20 SIOUX FALLS 3.4
ESE.
0700 AM HEAVY RAIN 1 WNW DELL RAPIDS 43.83N 96.73W
07/06/2020 M0.52 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-70 DELL RAPIDS 0.9
WNW.
0700 AM HEAVY RAIN 4 SSE GARRETSON 43.66N 96.47W
07/06/2020 M0.53 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-78 GARRETSON 4.2 SSE.
0700 AM HEAVY RAIN 4 WNW ROWENA 43.55N 96.63W
07/06/2020 M0.54 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-82 SIOUX FALLS 5.2 E.
0700 AM HEAVY RAIN 2 WSW GARRETSON 43.71N 96.53W
07/06/2020 M0.53 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-91 GARRETSON 1.7 WSW.
0700 AM HEAVY RAIN 1 E SPIRIT LAKE 43.42N 95.10W
07/06/2020 M0.60 INCH DICKINSON IA CO-OP OBSERVER
CO-OP OBSERVER STATION SPRI4 0.6 E SPIRIT
LAKE.
0700 AM HEAVY RAIN 3 ESE LESTER 43.42N 96.28W
07/06/2020 M1.65 INCH LYON IA COCORAHS
COCORAHS STATION IA-LY-11 ROCK RAPIDS 5.6 W.
0700 AM HEAVY RAIN 2 NNE LAKEFIELD 43.70N 95.15W
07/06/2020 M0.53 INCH JACKSON MN CO-OP OBSERVER
CO-OP OBSERVER STATION LKFM5 LAKEFIELD 2 NE.
0700 AM HEAVY RAIN FORESTBURG 44.02N 98.11W
07/06/2020 M0.84 INCH SANBORN SD COCORAHS
COCORAHS STATION SD-SB-2 FORESTBURG 0.1 NE.
0700 AM HEAVY RAIN 3 NW EVERLY 43.18N 95.37W
07/06/2020 M0.50 INCH CLAY IA CO-OP OBSERVER
CO-OP OBSERVER STATION EVYI4 2.8 NW EVERLY.
0630 AM HEAVY RAIN HOWARD 44.01N 97.53W
07/06/2020 M0.78 INCH MINER SD CO-OP OBSERVER
CO-OP OBSERVER STATION HOWS2 HOWARD.
0600 AM HEAVY RAIN EDGERTON 43.87N 96.13W
07/06/2020 M2.09 INCH PIPESTONE MN COCORAHS
COCORAHS STATION MN-PS-6 EDGERTON 0.2 WSW.
0600 AM HEAVY RAIN 4 S COLTON 43.73N 96.94W
07/06/2020 M0.82 INCH MINNEHAHA SD COCORAHS
COCORAHS STATION SD-MH-101 COLTON 3.8 S.
0600 AM HEAVY RAIN 7 NNE HADLEY 44.09N 95.81W
07/06/2020 M1.17 INCH MURRAY MN COCORAHS
COCORAHS STATION MN-MY-6 SLAYTON 7.1 NNW.
0700 PM HEAVY RAIN IROQUOIS 44.37N 97.85W
07/05/2020 M0.71 INCH KINGSBURY SD CO-OP OBSERVER
CO-OP OBSERVER STATION IRQS2 IROQUOIS.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1220 PM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1100 AM HEAVY RAIN 8 SSW AURORA 44.18N 96.75W
07/06/2020 M1.66 INCH MOODY SD CO-OP OBSERVER
CO-OP OBSERVER STATION BRKS2 7.7 SW AURORA.
1205 PM HEAVY RAIN 3 SE BALTIC 43.73N 96.68W
07/06/2020 M0.98 INCH MINNEHAHA SD MESONET
MESONET STATION BTCS2 BALTIC.
1205 PM HEAVY RAIN 2 ESE COLTON 43.77N 96.89W
07/06/2020 M0.63 INCH MINNEHAHA SD MESONET
MESONET STATION CTNS2 COLTON.
1135 AM HEAVY RAIN DOON 43.28N 96.23W
07/06/2020 M2.50 INCH LYON IA PUBLIC
REPORT VIA SOCIAL MEDIA.
1115 AM HEAVY RAIN 7 E AVOCA 43.95N 95.51W
07/06/2020 M1.60 INCH MURRAY MN MESONET
MESONET STATION AVOM5 7.5 S DOVRAY.
1125 AM HEAVY RAIN 2 N ELKTON 44.26N 96.48W
07/06/2020 M0.75 INCH BROOKINGS SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1000 AM HEAVY RAIN 6 WNW GARRETSON 43.74N 96.61W
07/06/2020 M0.85 INCH MINNEHAHA SD CO-OP OBSERVER
CO-OP OBSERVER STATION EROS2 5.9 W
GARRETSON.
1100 AM HEAVY RAIN 3 NNE HARTFORD 43.66N 96.92W
07/06/2020 M0.87 INCH MINNEHAHA SD CO-OP OBSERVER
CO-OP OBSERVER STATION HTFS2 2.7 NE
HARTFORD.
1201 PM HEAVY RAIN 2 NW HARTLEY 43.20N 95.50W
07/06/2020 M1.02 INCH O'BRIEN IA MESONET
MESONET STATION EW7617 HARTLEY.
1115 AM HEAVY RAIN 6 W PIPESTONE 43.99N 96.43W
07/06/2020 M1.92 INCH PIPESTONE MN MESONET
MESONET STATION PSTM5 6.0 NW IHLEN.
1210 PM HEAVY RAIN 3 W ARCO 44.39N 96.24W
07/06/2020 M0.54 INCH LINCOLN MN MESONET
MESONET STATION AT653 IVANHOE.
1200 PM HEAVY RAIN 3 SSE LAKE PARK 43.40N 95.31W
07/06/2020 M0.57 INCH DICKINSON IA MESONET
MESONET STATION AS497 LAKE PARK.
1206 PM HEAVY RAIN LAKEFIELD 43.68N 95.18W
07/06/2020 M0.81 INCH JACKSON MN MESONET
MESONET STATION FW2295 LAKEFIELD.
1201 PM HEAVY RAIN 3 WSW LUVERNE 43.64N 96.26W
07/06/2020 M3.75 INCH ROCK MN MESONET
MESONET STATION FW5856 LUVERNE.
1100 AM HEAVY RAIN 1 NNE LUVERNE 43.67N 96.20W
07/06/2020 M3.48 INCH ROCK MN CO-OP OBSERVER
CO-OP OBSERVER STATION LUVM5 0.9 NE LUVERNE.
1115 AM HEAVY RAIN 5 N PIPESTONE 44.08N 96.33W
07/06/2020 M1.70 INCH PIPESTONE MN MESONET
MESONET STATION PSNM5 5.3 N PIPESTONE.
1200 PM HEAVY RAIN 1 NNE ROCK VALLEY 43.21N 96.29W
07/06/2020 M0.57 INCH SIOUX IA MESONET
MESONET STATION RKVI4 0.7 N ROCK VALLEY.
1209 PM HEAVY RAIN 4 ENE ALEXANDRIA 43.67N 97.71W
07/06/2020 M0.94 INCH HANSON SD MESONET
MESONET STATION 213 SD RWIS ALEXANDRIA.
1207 PM HEAVY RAIN 3 W DELL RAPIDS 43.82N 96.78W
07/06/2020 M2.61 INCH MINNEHAHA SD MESONET
MESONET STATION 17 SD RWIS DELL RAPIDS.
1209 PM HEAVY RAIN 4 ESE FORESTBURG 44.01N 98.03W
07/06/2020 M0.60 INCH SANBORN SD MESONET
MESONET STATION 6 SD RWIS FORESTBURG.
1206 PM HEAVY RAIN 1 S KIMBALL 43.74N 98.96W
07/06/2020 M1.07 INCH BRULE SD MESONET
MESONET STATION 25 SD RWIS KIMBALL.
1209 PM HEAVY RAIN 3 SE MONTROSE 43.67N 97.15W
07/06/2020 M1.54 INCH MCCOOK SD MESONET
MESONET STATION 18 SD RWIS MONTROSE.
1209 PM HEAVY RAIN 10 SSW AURORA 44.15N 96.76W
07/06/2020 M0.68 INCH MOODY SD MESONET
MESONET STATION 224 SD RWIS WARD.
1137 AM HEAVY RAIN SIBLEY 43.40N 95.74W
07/06/2020 E1.00 INCH OSCEOLA IA PUBLIC
REPORT VIA SOCIAL MEDIA.
1203 PM HEAVY RAIN 1 NNE SIOUX CENTER 43.08N 96.16W
07/06/2020 M0.94 INCH SIOUX IA MESONET
MESONET STATION AR437 SIOUX CENTER.
1130 AM HEAVY RAIN 4 ESE SIOUX FALLS 43.51N 96.65W
07/06/2020 M0.75 INCH MINNEHAHA SD CO-OP OBSERVER
CO-OP OBSERVER STATION HMDS2 SIOUX FALLS
HARMONDON PARK.
1153 AM HEAVY RAIN 1 WSW SLAYTON 43.98N 95.78W
07/06/2020 M0.52 INCH MURRAY MN AWOS
AWOS STATION KDVP SLAYTON MUNICIPAL AIRPORT.
1208 PM HEAVY RAIN STORDEN 44.03N 95.33W
07/06/2020 M0.92 INCH COTTONWOOD MN MESONET
MESONET STATION FW0422 STORDEN.
1155 AM HEAVY RAIN 1 N TRACY 44.25N 95.62W
07/06/2020 M1.07 INCH LYON MN AWOS
AWOS STATION KTKC TRACY AIRPORT.
1156 AM HEAVY RAIN 2 ENE WORTHINGTON 43.63N 95.57W
07/06/2020 M1.54 INCH NOBLES MN AWOS
AWOS STATION KOTG WORTHINGTON AIRPORT.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1248 PM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1233 PM HEAVY RAIN SIOUX CENTER 43.08N 96.17W
07/06/2020 M1.10 INCH SIOUX IA PUBLIC
REPORT VIA SOCIAL MEDIA.
1113 AM HEAVY RAIN 1 NE MADISON 44.02N 97.10W
07/06/2020 M1.20 INCH LAKE SD PUBLIC
REPORT VIA SOCIAL MEDIA.
1043 AM HEAVY RAIN LUVERNE 43.65N 96.21W
07/06/2020 E5.00 INCH ROCK MN PUBLIC
REPORT VIA SOCIAL MEDIA.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
105 PM CDT MON JUL 6 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1026 AM HEAVY RAIN 5 NE MELVIN 43.33N 95.53W
07/06/2020 M0.70 INCH OSCEOLA IA PUBLIC
REPORT VIA SOCIAL MEDIA.
&&The Sioux Falls radar (KFSD), 87 km away, was scanning. The volume nearest the first event began at 18:41 UTC.
13 hail, 10 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Large hail preceded by some heavy rainfall and gusty wind. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Ping-pong ball size hail fell at the Interstate 90 exit for Alexandria.
Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Several 4 inch diameter limbs were downed by strong thunderstorm winds. Property damage costs are rough estimates.
Highway 44 was temporarily blocked by law enforcement while multiple inches of water flowed over the roadway.
A couple of large trees were toppled by strong wind gusts. Property damage costs are rough estimates.
Automated weather station KYKN measured a 68 mph wind gust.
Crops were stripped to the stem by wind driven sub-severe hail. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
While dime size hail and winds to around 60 mph occurred in Mission Hill, it was part of a 3 mile wide swath of more significant wind-driven hail from around 4 miles north northwest of Mission Hill to a mile south of Mission Hill. Corn and soybean fields were pulverized to stubble, with most trees stripped of leaves. At a farm 3 miles northwest of Mission Hill, a grain bin, machine shed and trailer home each lost part of the roof. Along the path, three center irrigation pivots were overturned. Property damage costs are rough estimates. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
South Dakota RWIS station SD532 near Gayville measured a peak wind of 66 mph. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
A pine tree with a trunk diameter of six feet was downed due to strong thunderstorm wind gusts. Property damage costs are rough estimates.
Strong winds accompanied the hail. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Winds to 60 mph were measured by a personal weather station.
Nickel sized hail piled up on the west side of buildings and stripped leaves from trees.
Soybean leaves were ripped up with some wind and hail as large as quarters, but mostly up to nickel size. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
Roads were flooded over the curb in Armour, with water encroaching on several buildings. Numerous intersections along SD Highway 44 had standing water. Rainfall totaled 3.88 inches 3 miles south southwest of Corsica and 3.16 inches 5 miles west of Armour. Property damage costs are rough estimates.
Automated weather station K9V9 measured a peak wind of 61 mph.
South Dakota RWIS station SD554 14 miles west of Platte near the Platte-Winner bridge measured a peak wind gust of 72 mph.
South Dakota RWIS station SD588 near Fort Randall Dam measured a peak wind gust of 64 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2020Every state in 2020This day in weather historyWarnings in South Dakota, July 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 909298, 909299, 909300, 909303, 909304, 909305, 909306, 909351, 909292, 909349, 909352, 909343, 909353, 909354, 909350, 909344, 909355, 909345, 909346, 909347, 909348, 909297, 909356, 909357, 909358.