Alert archive / South Dakota / Winter Weather Advisories in 2017
Winter Weather Advisory 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter weather advisory at Jan 24, 2017, 3:56 AM CST for Beadle County, Brookings County, Kingsbury County, South Dakota; Lincoln County, Lyon County, Minnesota. It took effect at Jan 24, 2017, 6:00 AM CST. It was in force for 30 hr.
The area
The counties it named.
The facts
- Issued
- Jan 24, 2017, 3:56 AM CST (09:56 UTC)
- In effect from
- Jan 24, 2017, 6:00 AM CST
- Expired
- Jan 25, 2017, 12:00 PM CST
- In force
- 30 hr
- Issued by
- NWS Sioux Falls, SD
Counties Lincoln County, MN, Lyon County, MN, Beadle County, SD, Brookings County, SD, Kingsbury County, SD
The radar
The Sioux Falls radar (KFSD), 91 km from the middle of the area, began a volume at 10:00 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 9.9 hours before the alert went out and 269 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 649 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter weather 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 winter weather advisory went out at Jan 23, 10:35 PM CST, 5 hours 21 minutes earlier.
Area forecast discussion, Jan 23, 10:35 PM CST, 5 hours 21 minutes before
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</html>Hazardous weather outlook, Jan 23, 12:10 PM CST, 15 hours 46 minutes before
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</html>The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 24, 3:56 AM CST | Winter Storm Warning | FSD | Aurora, Bon Homme, Brule, Charles Mix, Davison, Douglas and 7 more | 32 hr |
Nearby
Winter Weather Advisories in South Dakota, 2017Winter Weather Advisories in Minnesota, 2017Every winter weather advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.