Alert archive / South Dakota / River Flood Warnings in 2018
River Flood Warning 246, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this river flood warning at Sep 23, 2018, 8:34 PM CDT for Union County, South Dakota. It was in force for 5 days.
The area
The counties it named.
The facts
- Issued
- Sep 23, 2018, 8:34 PM CDT (01:34 UTC)
- Expired
- Sep 28, 2018, 9:50 AM CDT
- In force
- 5 days
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Flood severity
- Minor
County Union County, SD
The radar
The Sioux Falls radar (KFSD), 84 km from the middle of the area, began a volume at 01:33 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point Big Sioux River near Jefferson (BSJS2). The gauge peaked at 35.77 ft at Sep 25, 2018, 9:00 AM CDT.
- Action stage
- 28 ft
- Minor stage
- 31 ft
- Moderate stage
- 35 ft
- Major stage
- 40 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 06485910, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river flood warning went out, 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 this river flood warning went out at Sep 23, 6:18 PM CDT, 2 hours 16 minutes earlier.
Area forecast discussion, Sep 23, 6:18 PM CDT, 2 hours 16 minutes before
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</html>Hazardous weather outlook, Sep 23, 4:26 AM CDT, 16 hours 8 minutes before
Hazardous Weather Outlook National Weather Service Sioux Falls SD 426 AM CDT Sun Sep 23 2018 IAZ001-MNZ071-072-080-097-098-SDZ056-061-062-065>070-240930- Lyon IA-Lincoln MN-Lyon MN-Murray-Pipestone-Rock-Moody-McCook- Minnehaha-Hutchinson-Turner-Lincoln SD-Bon Homme-Yankton-Clay SD- 426 AM CDT Sun Sep 23 2018 This Hazardous Weather Outlook is for portions of northwest Iowa, southwest Minnesota, east central South Dakota, and southeast South Dakota. .DAY ONE...Today and Tonight Many rivers and streams are at bankfull or in flood across the area. Fortunately, moderate or heavy amounts of rainfall will likely not occur over the next several days, which will allow water to slowly recede. In the meantime, be aware that some secondary roads may be underwater, including roads and low height bridges close to rivers. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight. SDZ038>040-050-052>055-057>060-063-064-240930- Beadle-Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake- Brule-Aurora-Davison-Hanson-Charles Mix-Douglas- 426 AM CDT Sun Sep 23 2018 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...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight. IAZ002-003-012>014-020>022-031-032-MNZ081-089-090-NEZ013-014- SDZ071-240930- Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Cottonwood-Nobles-Jackson-Dixon-Dakota- Union- 426 AM CDT Sun Sep 23 2018 This Hazardous Weather Outlook is for portions of northwest Iowa, west central Iowa, southwest Minnesota, northeast Nebraska, and southeast South Dakota. .DAY ONE...Today and Tonight Many rivers and streams are at bankfull or in flood across the area. Fortunately, moderate or heavy amounts of rainfall will likely not occur over the next several days, which will allow water to slowly recede. In the meantime, be aware that some secondary roads may be underwater, including roads and low height bridges close to rivers. .DAYS TWO THROUGH SEVEN...Monday through Saturday Around a cold frontal passage, there is a chance for thunderstorms Monday afternoon and evening. Some of the stronger cells may have small hail and gusty winds. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight.
Nearby
River Flood Warnings in South Dakota, 2018Every river flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.