Alert archive / South Dakota / River Flood Warnings in 2017

River Flood Warning 26, NWS Sioux Falls, SD

October 7, 2017Minnehaha County, South Dakota

NWS Sioux Falls, SD issued this river flood warning at Oct 7, 2017, 8:22 PM CDT for Minnehaha County, South Dakota. It took effect at Oct 8, 2017, 7:00 AM CDT. It was in force for 5 days.

The area

The counties it named.

The facts

Issued: Oct 7, 2017, 8:22 PM CDT (01:22 UTC)
In effect from: Oct 8, 2017, 7:00 AM CDT
Expired: Oct 12, 2017, 10:25 PM CDT
In force: 5 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

County Minnehaha County, SD

The radar

The Sioux Falls radar (KFSD), 11 km from the middle of the area, began a volume at 01:22 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 at Sioux Falls I-90 (SFLS2).

Action stage: 11 ft
Minor stage: 12 ft
Moderate stage: 15 ft
Major stage: 17 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record, 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 Oct 7, 6:24 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Oct 7, 6:24 PM CDT, 1 hour 58 minutes before

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Hazardous weather outlook, Oct 7, 8:10 PM CDT, 12 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
810 PM CDT Sat Oct 7 2017

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-090115-
Lyon IA-Osceola-Dickinson-Sioux-O'Brien-Clay IA-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln MN-Lyon MN-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-Lincoln SD-Bon Homme-Yankton-Clay SD-Union-
810 PM CDT Sat Oct 7 2017

This Hazardous Weather Outlook is for portions of 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...Sunday through Friday

On Tuesday morning, areas of frost are possible as temperatures
dip into the mid 30s.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 8, 3:28 AM CDT	Freeze Watch	FSD	Aurora, Beadle, Brookings, Brule, Charles Mix, Davison and 11 more	24 hr
Oct 7, 8:22 PM CDT	River Flood Warning	FSD	Clay	4 days

Nearby

River Flood Warnings in South Dakota, 2017 Every river flood warning in 2017

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.