Seasonal conditions led to the removal of severe drought across the remainder of southeast South Dakota.
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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.
Seasonal conditions led to the removal of severe drought across the remainder of southeast South Dakota.
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 Apr 30, 9:50 PM CST, 2 hours 10 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Sioux Falls SD 1050 PM CDT Wed Apr 30 2025 .KEY MESSAGES... - Chances (20-50%) for rain persist for the rest of today and Thursday. Rainfall amounts are expected to be light with most areas seeing a tenth of an inch or less. - Temperatures remain seasonable for the rest of the work week before warming to above average over the weekend. - Low confidence in rain chances next week due to a blocking pattern setting up. && .DISCUSSION... Issued at 243 PM CDT Wed Apr 30 2025 Isolated light showers/virga persists across parts of northwest Iowa and southwest Minnesota. Should see these showers persist into the evening hours along with new showers pushing into northwest Iowa before pushing east of the area. A weak cold front will begin to push into the area late this afternoon/early this evening. Showers look to develop along the boundary as a weak shortwave trough hits the boundary. There could be some thunder within the showers as bufkit soundings show minimal CAPE values <= 300 J/kg. Thus, strong to severe storms are not expected. However, the same soundings show weak inverted-v profiles. This could lead to gusty winds as the showers push through the area. With the front pushing through the entire area through the overnight hours, think that any chance for gusty winds will come this evening before the low levels stabilize. Rainfall amounts are expected to be light with most locations seeing below a tenth of an inch. A few locations, mainly across parts of central South Dakota, could see locally higher rainfall amounts up to around a quarter of an inch. This will depend on how any heavier showers track however. The cloud cover will keep low temperatures on the mild side, only allowing for lows to fall to the 40s and 50s. The base of the previously mentioned upper wave will reside over the forecast area on Thursday. This will steepen lapse rates just enough to generate minor instability with values again less then 300 J/kg of CAPE. With near saturated thermal profiles in place, scattered showers are expected to develop. The best forcing for ascent will come later in the day though so am expecting the scattered showers to develop during the second half of the afternoon and evening hours. A few rumbles of thunder is possible with any shower along with gusty winds but no severe storms are expected. Rainfall amounts will again be light with the showers with most locations seeing a tenth of an inch or less. Despite partly to mostly cloudy skies covering the area, high temperatures are still expected to warm to the 60s. Marginally breezy winds are expected with gusts up to 20-25 mph lasting for the daylight hours. Low temperatures will be near seasonable in the 40s. Friday through the weekend looks to be dry as upper level ridging pushes into the center part of the country. While Friday will be the coolest day with highs remaining in the 60s, temperatures look to warm much more to the 70s on Saturday and 70s and potentially low 80s on Sunday. This is supported by the ensembles as they show a 40- 80% chance for temperatures to exceed 70F. Southerly winds look to strengthen on Sunday which could lead to breezy winds across the area. This is a bit uncertain though as confidence begins to decrease in how the upper level pattern will evolve. For early next week, medium range guidance shows an omega blocking pattern setting up. The general consensus is that the ridging in the center of this blocking pattern will sit over the central US. However, each model depicts a different scenario in how the pattern will evolve with time. The ensembles also vary in the patterns evolution as well, further contributing to low confidence in the overall forecast. For now, have left the NBM data in place but will be watching how the pattern plays out over the coming days. If the upper low over the western CONUS is able to maintain sufficient strength and meander towards the Plains, then rain chances may be possible. If it does not do this, then chances for rain could be hard to come by. Should the main upper level ridging hold over the Plains, then above average temperatures from the weekend will persist for the first half of next week. && .AVIATION /06Z TAFS THROUGH 06Z FRIDAY/... Issued at 1047 PM CDT Wed Apr 30 2025 MVFR to potentially IFR stratus will impact the area through the mid morning hours before ceilings begin to lift by the late morning into the afternoon. There are some questions around how low some of the ceilings will get in our area, but there was enough confidence to add IFR conditions for areas along and east of I-29. Rain during the TAF period will come in two rounds primarily in the form of scattered showers. These showers will be possible through the morning, with a lull in the activity for the early to mid afternoon before another round of scattered showers develop for the later afternoon into the evening. Can't rule out some thunder with both rounds of rain, but confidence in coverage and location was not high enough to include in the TAFs at this time. A cold front will move through the area from west to east to start the period. This should gradually turn any remaining southerly winds to the west and then northwest by mid morning. Winds will be light when the front passes through, but expect another increase in these northwesterly winds through the day Thursday, with gusts as high as 20-25 kts, higher in any thunderstorm. Winds will die down to close the period. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...None. MN...None. IA...None. NE...None. && DISCUSSION...Meyers AVIATION...Samet
Hazardous Weather Outlook National Weather Service Sioux Falls SD 339 PM CDT Wed Apr 30 2025 IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097- 098-NEZ013-014-SDZ040-055-056-061-062-065>071-012045- Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson- Pipestone-Rock-Dixon-Dakota-Brookings-Lake-Moody-McCook-Minnehaha- Hutchinson-Turner-Bon Homme-Yankton-Union- 339 PM CDT Wed Apr 30 2025 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, east central South Dakota, and southeast South Dakota. .DAY ONE...This Afternoon and Tonight Isolated showers to thunderstorms are expected this evening and overnight, but are not expected to produce severe weather or heavy rain. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Scattered showers and isolated thunderstorms continue Thursday and Thursday afternoon. A brief lull before another round of showers and thunderstorms develop Friday morning. Severe weather and heavy rain are not expected. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. SDZ038-039-050-052>054-057>060-063-064-012045- Beadle-Kingsbury-Gregory-Jerauld-Sanborn-Miner-Brule-Aurora- Davison-Hanson-Charles Mix-Douglas- 339 PM CDT Wed Apr 30 2025 This Hazardous Weather Outlook is for portions of central South Dakota, east central South Dakota, south central South Dakota, and southeast South Dakota. .DAY ONE...This Afternoon and Tonight Scattered showers and thunderstorms are expected early this evening, but should diminish fairly quickly by 10 to 11 pm. The main threats from these thunderstorms will be spotty lightning and wind gusts to 45 mph. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Scattered showers and isolated thunderstorms will again be possible Thursday afternoon and evening with lightning and wind gusts of 45 mph again the main concerns. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The national radar mosaic for the moment the first event began.
2 drought. Local standard time, as filed.
Severe (D2) drought conditions improved to moderate (D1) by late month.
Severe (D2) drought conditions improved to moderate (D1) by late month.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2025Every state in 2025This day in weather historyWarnings in South Dakota, May 2025
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: 1257151, 1257152.