Alert archive / South Dakota / Dense Fog Advisories in 2021

Dense Fog Advisory 12, NWS Sioux Falls, SD

May 30, 20219 counties in South Dakota

NWS Sioux Falls, SD issued this dense fog advisory at May 30, 2021, 4:08 AM CDT for 9 counties in South Dakota. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: May 30, 2021, 4:08 AM CDT (09:08 UTC)
Expired: May 30, 2021, 9:07 AM CDT
In force: 5 hr
Issued by: NWS Sioux Falls, SD

Counties Aurora County, SD, Beadle County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Jerauld County, SD, Sanborn County, SD

The radar

The Sioux Falls radar (KFSD), 147 km from the middle of the area, began a volume at 09:08 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.

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at May 30, 3:55 AM CDT, 13 minutes earlier.

Area forecast discussion, May 30, 3:55 AM CDT, 13 minutes before

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Nearby

Dense Fog Advisories in South Dakota, 2021 Every dense fog advisory in 2021

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.