Periodic moderate to heavy rainfall returned the lower James River to flooding conditions mid to late month. More than twice the normal rainfall occurred at Huron and Forestburg during July.
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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.
Periodic moderate to heavy rainfall returned the lower James River to flooding conditions mid to late month. More than twice the normal rainfall occurred at Huron and Forestburg during July.
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 9, 5:00 PM CST, 3 hours earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 600 PM CDT Tue Jul 9 2019 .SHORT TERM...(This Evening through Wednesday) Issued at 323 PM CDT Tue Jul 9 2019 An unseasonably strong low pressure was rotating slowly east across the Montana/Wyoming border. This is driving cooler and drier air into the area. A trough axis will spread through southwest Minnesota and northwest Iowa late this afternoon and could provide enough convergence for isolated showers and thunderstorms but there is enough of a cap that the chance for that is very limited. If something can develop the better chances will be across southwest Minnesota but severe weather is not expected. Another area to watch during the later evening will be south central SD as thunderstorms that develop in western SD are expected to work eastward. There is a slightly better chance for a severe storm there but still a low chance. Otherwise westerly winds will gradually increase overnight and coupled with gradually falling temperatures will bring a somewhat cool Wednesday morning. Most locations will see overnight lows in the lower to mid 60s. Winds will increase quickly Wednesday morning and continue through the day. They should average about 20 to 30 mph with a few gusts around 40 mph likely. This is in response to the unseasonably strong low pressure. As this low pressure moves through there may be an isolated shower on Wednesday with the better chances north of I90. Highs will be cooler and mainly in the 70s. .LONG TERM...(Wednesday Night through Tuesday) Issued at 323 PM CDT Tue Jul 9 2019 Once this wave passes flat upper level ridging will spread east and bring increasing temperatures with a slight decrease in chances for showers and thunderstorms. The models do agree with a piece of energy wrapping north from the Rockies onto the Plains Friday night and another wave Saturday night but overall confidence not there for anything more than lower end chances. Upper level ridging tries to build a bit more Sunday into Tuesday but where and how the tropical disturbance in the gulf moves onto land will play a role in how the pattern evolves. Will continue the hot and humid forecast with highs Friday through Monday from the upper 80s to mid 90s and heat indices about 95 to 100 every day. Will need to keep an eye on the model forecast dew points. They did not do very well with the previous period of higher dew points and the latest National blend came in in the 10th to 50th percentile, the lower end, during this time. Went ahead and bumped up dew points closer to the 50th to 75th percentile which focuses more 70 to 75 dew points vs 66 to 71 like the blend was giving. If dew points are closer to 73 to 77 with the highs that are being forecast we would easily get into heat advisory criteria. && .AVIATION...(For the 00Z TAFS through 00Z Wednesday evening) Issued at 555 PM CDT Tue Jul 9 2019 A disturbance will bring MVFR stratus to areas generally from the Interstate 90 corridor and northward by Wednesday morning, but these clouds will lift by the afternoon. Otherwise, west/northwesterly winds will increase later tonight, gusting around 25 to 30 kts into Wednesday evening. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...08 LONG TERM...08 AVIATION...JM
Hazardous Weather Outlook National Weather Service Sioux Falls SD 617 PM CDT Tue Jul 9 2019 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-052>056-058>062-064>071-102330- 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-Jerauld- Sanborn-Miner-Lake-Moody-Aurora-Davison-Hanson-McCook-Minnehaha- Douglas-Hutchinson-Turner-Bon Homme-Yankton-Union- 617 PM CDT Tue Jul 9 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...Tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. SDZ050-057-063-102330- Gregory-Brule-Charles Mix- 617 PM CDT Tue Jul 9 2019 This Hazardous Weather Outlook is for south central South Dakota. .DAY ONE...Tonight. Isolated thunderstorms may push into the area during the mid evening. These storms could produce hail to the size of quarters and winds to 60 mph. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
826 PM CDT TUE JUL 9 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0818 PM HAIL 5 SSW DIXON 43.31N 99.51W
07/09/2019 M0.70 INCH GREGORY SD PUBLIC
TREE BRANCHES DOWN IN THEIR YARD AS WELL,
NOT SURE ON SIZE.
&&
ATPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
832 PM CDT TUE JUL 9 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0820 PM HAIL 3 NE DALLAS 43.27N 99.49W
07/09/2019 M0.70 INCH GREGORY SD PUBLIC
&&
ATPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
855 PM CDT TUE JUL 9 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0818 PM TSTM WND DMG 5 SSW DIXON 43.31N 99.51W
07/09/2019 GREGORY SD PUBLIC
12 FOOT LONG TREE BRANCH, 6 INCHES IN
DIAMETER BROKEN OFF.
&&
ATThe national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
The James River near Scotland (gage site SCOS2) crested at 3.24 feet above flood stage on July 19. Many rural roads near the river were inundated, with flooding of significant amounts of agricultural land. Moderate flooding continued at the end of the month.
The James River near Scotland (gage site SCOS2) crested at 3.24 feet above flood stage on July 19. Many rural roads near the river were inundated, with flooding of significant amounts of agricultural land. Moderate flooding continued at the end of the month.
The James River near Scotland (gage site SCOS2) crested at 3.24 feet above flood stage on July 19. Many rural roads near the river were inundated, with flooding of significant amounts of agricultural land. Moderate flooding continued at the end of the month.
The James River near Yankton (gage site YNNS2) crested 3.33 feet above flood stage on July 20. Southwest Jim River road was inundated once again, with flooding of significant amounts of agricultural land.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2019Every state in 2019This day in weather historyWarnings in South Dakota, July 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 2026-10-01. Each event’s entry at NCEI: 842077, 842079, 842080, 842081.