Temperatures and precipitation averaged fairly close to normal during July.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
Temperatures and precipitation averaged fairly close to normal 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 Jun 30, 9:27 PM CST, 2 hours 33 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Sioux Falls SD 1027 PM CDT Wed Jun 30 2021 .SHORT TERM...(This Evening through Thursday) Issued at 256 PM CDT Wed Jun 30 2021 Tonight we will remain under the influence of a very weak trough extending west-southwest from a more prominent upper level trough over eastern Canada. This tops an elongated surface ridge axis extending from central Canada into the US Plains. Aside from our diurnal cumulus, which should again dissipate toward sunset, the weak upper level trough will have little impact on our weather tonight, with mostly clear skies and light winds again expected. Could see a little patchy fog again toward daybreak, though any residual boundary layer moisture from recent rainfall has been slowly mixing out, and forecast soundings not as supportive of fog development, so will not include any fog in tonight's forecast. Thursday through Thursday night, the aforementioned weak trough drifts southward, while an upper level ridge becomes the dominant feature across the northern Plains. The lower level ridge axis will shift slightly eastward, from far eastern SD into MN/IA by daybreak Friday. Will see some increase in south-southwesterly low level flow aloft across our western counties as a result, but moisture becomes even more limited with the building ridge aloft, so expect mostly clear skies with light/variable winds gradually favoring southeast to south through Thursday night. Little change in the low level temperatures the next 24-36 hours, so would expect to see highs tomorrow similar to today, from mid 80s east to around 90 west. The mostly clear skies with light winds will allow for comfortable nights with lows in the upper 50s-lower 60s. .LONG TERM...(Thursday Night through Wednesday) Issued at 256 PM CDT Wed Jun 30 2021 Prevailing upper level ridge over the northern Plains Friday will be flattened by a weak trough sliding through southern Canada and the northern US over the holiday weekend. Still seeing little in the way of appreciable moisture to work with in the wake of departing ridge, so precipitation chances will remain limited, perhaps some spotty showers or storms in our far western counties later Saturday night through Monday near an associated surface boundary, with moderate instability indicated in some model solutions during the afternoon or early evening. With very weak flow aloft, shear is quite meager, so don't expect severe weather to threaten 4th of July activities, but cannot rule out that some of Mother Nature's fireworks may have an impact at times. Could see additional waves slide across the region through the first half of next week, as flow aloft settles into quasi-zonal pattern across the northern US. At this range, models are much too varied in their solutions to pinpoint timing/strength of any particular wave. As such, will stick with the smattering of low pops through Tuesday and Wednesday. If/When an area does see rain, temperatures may end up cooler than currently forecast, but on the whole, the flow pattern through the weekend and early next week will favor warming temperatures. Slight cooling appears possible by the middle of next week, with some GEFS and ECMWF ensemble members hinting at a stronger wave bringing some cooler air southward by later Tuesday/Wednesday, but again, too much uncertainty to make any changes to blended forecast at this range. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1026 PM CDT Wed Jun 30 2021 VFR conditions expected through the TAF period. Winds will be light into Thursday night. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...JH LONG TERM...JH AVIATION...JM
Hazardous Weather Outlook National Weather Service Sioux Falls SD 606 PM CDT Wed Jun 30 2021 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ038>040-050-052>071-012315- 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- 606 PM CDT Wed Jun 30 2021 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. 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.
The national radar mosaic for the moment the first event began.
1 drought. Local standard time, as filed.
Severe (D2) drought conditions continued through July. Precipitation was less than 50 percent of normal at Newcastle and Concord. Crop damage is an estimate from insured losses. Information provided by the United States Department of Agriculture.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2021Every state in 2021This day in weather historyWarnings in Nebraska, July 2021
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: 967549.