Alert archive / Iowa / River Flood Warnings in 2024

River Flood Warning 1, NWS Sioux Falls, SD

April 30, 2024Dickinson County, Iowa

NWS Sioux Falls, SD issued this river flood warning at Apr 30, 2024, 8:50 AM CDT for Dickinson County, Iowa. It took effect at Apr 30, 2024, 7:00 PM CDT. It was in force for 15 days.

The area

The counties it named.

The facts

Issued: Apr 30, 2024, 8:50 AM CDT (13:50 UTC)
In effect from: Apr 30, 2024, 7:00 PM CDT
Expired: May 15, 2024, 9:30 AM CDT
In force: 15 days
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Flood severity: Minor

County Dickinson County, IA

The radar

The Sioux Falls radar (KFSD), 129 km from the middle of the area, began a volume at 13:51 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 Little Sioux River near Milford (MIFI4).

Action stage: 11 ft
Minor stage: 13 ft
Moderate stage: 16 ft
Major stage: 20 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 Apr 30, 6:41 AM CDT, 2 hours 9 minutes earlier.

Area forecast discussion, Apr 30, 6:41 AM CDT, 2 hours 9 minutes before

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Hazardous weather outlook, Apr 30, 4:21 AM CDT, 4 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
421 AM CDT Tue Apr 30 2024

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-010930-
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-
421 AM CDT Tue Apr 30 2024

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...Today and Tonight

Two rounds of scattered thunderstorms are expected today as a cold
front moves through the area. The first round between 10 AM - 2 PM
is not expected to be severe, but can't rule out isolated quarter
sized hail. Second round of scattered thunderstorms are possible,
with a level 2 of 5 risk for severe weather primarily from 2 - 7 PM.
Large 2 inch hail and damaging wind gusts to 70 mph are the primary
threats, with a tornado and minor flooding from heavy downpours
being the secondary threats. Greatest risk (2/5) is for areas south
and east of a line from Marshall, MN to Salem, SD to Tyndall, SD,
with a lower risk (1/5) filling in the area from De Smet, SD to
Mitchell, SD and down to Lake Andes, SD.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Additional showers and thunderstorms are expected Wednesday
afternoon continuing into Thursday. While severe weather is not
anticipated, minor/isolated flooding issues are possible.

.SPOTTER INFORMATION STATEMENT...

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 3:14 PM CDT	Severe Thunderstorm Warning	FSD	Clay	31 min
Apr 30, 3:44 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	31 min

Nearby

River Flood Warnings in Iowa, 2024 Every river flood warning in 2024

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.