Runoff from 1 to 2 inches of rainfall throughout the Big Sioux River basin occurred in the week to 10 days prior to onset of renewed minor flooding.
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.
Runoff from 1 to 2 inches of rainfall throughout the Big Sioux River basin occurred in the week to 10 days prior to onset of renewed minor 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 Jun 27, 2:41 AM CST, 1 hour 19 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 341 AM CDT Thu Jun 27 2019 .SHORT TERM...(Today and Tonight) Issued at 340 AM CDT Thu Jun 27 2019 Complicated forecast this morning with well developed complex of storms working east across South Dakota. Wake low has developed on the backside of the system, with the winds gusting to near 60 mph in Faith. On the southern edge of the complex, have had reports of heat bursts in Mission SD. For this morning, followed the idea of the HiRes ARW and Experimental HRRR which focus the complex mainly along and north of highway 14 as the cap over the region looks to be quite strong with 10-11 C at 700 mb. Still wouldn't rule out an isolated storm or two to try to develop on the south side of the complex. If the storm is able to organize slightly, agree with SPC large hail up to 2" are possible. With the complex, potential for wind gusts to approach 65 mph. Models are hinting that as the complex works east, it may try to work south across southwest Minnesota following the thermal ridge. Bulk shear is also slightly stronger, so may be the potential for a few severe reports despite diurnal timing. With cold pool lingering across the northeast portion of the forecast area, have fairly tight gradient in forecast high from the northeast to the south. Picture for tonight is unclear as some of the convective allowing solutions indicate the potential for convection to redevelop along an outflow boundary late in the day. Have added low pops east of highway 59 in southwest Minnesota into Northwest Iowa for the potential, though it appears focus will be east. .LONG TERM...(Friday through Wednesday) Issued at 340 AM CDT Thu Jun 27 2019 Abbreviated discussion beyond today and tonight with active weather. Heat still expected Friday through Sunday with heat index values of 95-105 F. The peak of the heat appears to be on Saturday with widespread 100-105 heat index values. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1135 PM CDT Wed Jun 26 2019 Convective potential through the first half of this TAF period has trended north and slower in latest model runs. Confidence is lower that KFSD will see any thunderstorms, so removed thunder for now, but will keep a mention of showers mid-late Thursday morning to indicate favored time frame, should storms develop far enough south. Confidence still somewhat higher for KHON, though now looking more likely toward pre-dawn hours (10Z-12Z) than during the overnight. Confidence also somewhat higher than KSUX will remain well south of the convective activity. After 18Z Thursday, convection expected to push east of the area, though a few model solutions indicate chance of redevelopment into southwest Minnesota late in this TAF period. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...BT LONG TERM...BT AVIATION...JH
Hazardous Weather Outlook National Weather Service Sioux Falls SD 620 AM CDT Wed Jun 26 2019 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-271000- 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- 620 AM CDT Wed Jun 26 2019 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 tonight. These storms will be capable of producing winds to 65 mph and hail to the size of golfballs. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Temperatures will warm into the 90s on Friday through Sunday. With dew points near 70, heat indicies of 95 to 105 can be expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible after 9 PM tonight.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
419 AM CDT THU JUN 27 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0408 AM HAIL 5 WSW ALEXANDRIA 43.63N 97.87W
06/27/2019 M0.70 INCH HANSON SD TRAINED SPOTTER
&&
ATThe national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
The Big Sioux River above Hawarden (gage site HWDI4) crested 3.46 feet above flood stage on June 28, causing significant flooding of crop and pasture land. The river remained in minor flood stage at the end of the month.
The Big Sioux River near Brandon (gage site BBSS2) crested 0.47 feet above flood stage on June 28, causing significant flooding of crop and pasture land.
The Big Sioux River at Akron (gage site AKRI4) crested 2.62 feet above flood stage on June 28, causing significant flooding of crop and pasture land. The river remained in minor flood stage at the end of the month.
The Big Sioux River near Richland (gage site BSRS2) crested 2.43 feet above flood stage on June 29, causing significant flooding of crop and pasture land. The river remained in minor flood stage at the end of the month.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2019Every state in 2019This day in weather historyWarnings in Iowa, June 2019
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 2026-09-24. Each event’s entry at NCEI: 835867, 835860, 835869, 835872.