Minor flooding slowly dwindled during early August 2019 with dry weather to start the month.
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.
Minor flooding slowly dwindled during early August 2019 with dry weather to start the month.
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 31, 9:50 PM CST, 2 hours 10 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1050 PM CDT Wed Jul 31 2019 .SHORT TERM...(This Evening through Thursday) Issued at 222 PM CDT Wed Jul 31 2019 Remnant MCV moving into NW Iowa this afternoon has started to redevelop convection along 700 mb theta-e gradient this afternoon. Generally this activity will continue to track to the southeast and exit the area later this afternoon. Elsewhere, considerable cloud cover in the stable region behind this wave has limited temperatures today in many areas. However, with MCV moving east, it's possible to see a late run into the upper 70s in areas where the sun breaks out. Tonight: Most areas should see a quiet night, albeit a bit warmer. Models still show some broad and weak isentropic lift between the 310-315K surfaces. While this is mostly focused south of the area, could see some isolated activity creep north towards I-90 by daybreak Thursday. Thursday: Expecting a fair amount of cloud cover, although dry conditions are expected as well. It's possible given cooler southeast wind fetch, that any stratus develop could hamper temperatures further. Also to note is the split in model guidance with several models featuring much cooler temperatures likely due to increased moisture. .LONG TERM...(Thursday Night through Wednesday) Issued at 222 PM CDT Wed Jul 31 2019 Thursday night- Friday: Model guidance continues to show a barrage of 700:500 mb shortwaves slowly drifting into the region beginning Thursday night and continuing through Friday. Again, it's likely that PoPs are much too broad given the setup, but given the high moisture content and weak stability, the exact forecast placement of precipitation development is low. Regardless, temperatures will hold near or slightly below seasonal normals. Saturday-Sunday: Mid-level riding increases Saturday and Sunday, which makes favorable weather conditions more likely. Light winds may lead to fog development early Saturday morning, with temperatures back in the lower 80s with diurnal CU in the afternoon. Sunday will feature a bit more of a southwesterly wind fetch and a shade deeper mixing, which will also nudge out temperatures up slightly. It's possible to see some afternoon thunderstorm development out in Central and northern South Dakota in the late afternoon and evening. There would be an outside chance of a cluster of storms developing and moving southeast into Monday. Monday-Wednesday: Medium range models really become uncertain in the eventual pattern evolution by early next week. There should be some suppression of the mid-level ridge axis by early next week, which should allow a frontal boundary to drop southward. Currently, confidence in track or approach of any shortwave too low to force any chances to extended grids. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1039 PM CDT Wed Jul 31 2019 The potential for lower ceilings will be the main concern through the TAF period. Models have backed off slightly in the extent of patchy MVFR ceilings late tonight into midday Thursday. While confidence in the location of these ceilings is low, feel there is enough potential for mention of scattered deck at FSD and HON where models have a little better agreement that ceilings around 2000 to 3000 AGL will be possible. Ceilings improve late morning to midday, with VFR conditions expected otherwise. Winds will be from the southeast generally around 10 kt or less. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...Dux LONG TERM...Dux AVIATION...
Hazardous Weather Outlook National Weather Service Sioux Falls SD 411 AM CDT Wed Jul 31 2019 IAZ001>003-012>014-020>022-MNZ071-072-080-081-089-090-097-098- SDZ038>040-050-052>071-010915- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Lincoln-Murray-Cottonwood-Nobles-Jackson-Pipestone-Rock- Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody- Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton-Union- 411 AM CDT Wed Jul 31 2019 This Hazardous Weather Outlook is for northwest Iowa, southwest Minnesota, central South Dakota, east central South Dakota, south central South Dakota and southeast South Dakota. .DAY ONE...Today and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. IAZ031-032-NEZ013-014-010915- Woodbury-Ida-Dixon-Dakota- 411 AM CDT Wed Jul 31 2019 This Hazardous Weather Outlook is for west central Iowa and northeast Nebraska. .DAY ONE...Today and tonight. Scattered thunderstorms will be possible through late morning, then again later tonight. These storms are not expected to be severe. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
4 flood. Local standard time, as filed.
A continuation of flooding from July, the Big Sioux River near Estelline (gage site BSES2) started the month at 0.35 feet above flood stage, with inundation of crop and pasture land.
A continuation of flooding from July, the Big Sioux River near Bruce (gage site BRCS2) started the month at 0.53 feet above flood stage with flooding of agricultural land.
A continuation of flooding from July, the Big Sioux River near Brookings (gage site BRKS2) began the month at 1.49 feet above flood stage. Significant amounts of agricultural land remained flooded. A few rural roads near the gage site were also flooded.
A continuation of flooding from July, the Big Sioux River at Sioux Falls I-90 (gage site SFLS2) crested at 0.28 feet above flood stage on August 3. Significant amounts of agricultural land were flooded north of Sioux Falls.
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, August 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: 849616, 849617, 849618, 849620.