Alert archive / South Dakota / River Flood Warnings in 2019

River Flood Warning 323, NWS Sioux Falls, SD

October 1, 2019Union County, South Dakota; Plymouth County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Oct 1, 2019, 8:06 PM CDT for Union County, South Dakota; Plymouth County, Iowa. It took effect at Oct 1, 2019, 10:16 PM CDT. It was in force for 10 days.

The area

The counties it named.

The facts

Issued: Oct 1, 2019, 8:06 PM CDT (01:06 UTC)
In effect from: Oct 1, 2019, 10:16 PM CDT
Expired: Oct 12, 2019, 6:16 AM CDT
In force: 10 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

Counties Plymouth County, IA, Union County, SD

The radar

The Sioux Falls radar (KFSD), 92 km from the middle of the area, began a volume at 01:08 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 Akron (AKRI4). The gauge peaked at 17.38 ft at Oct 7, 2019, 10:00 PM CDT.

Action stage: 14 ft
Minor stage: 16 ft
Moderate stage: 18 ft
Major stage: 20 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 06485500, 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 1, 6:58 PM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Oct 1, 6:58 PM CDT, 1 hour 8 minutes before

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Hazardous weather outlook, Oct 1, 5:05 AM CDT, 15 hours 1 minute before

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Nearby

River Flood Warnings in South Dakota, 2019 River Flood Warnings in Iowa, 2019 Every river flood warning in 2019

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.