Alert archive / Minnesota / Winter Storm Watches in 2020
Winter Storm Watch 5, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter storm watch at Dec 22, 2020, 3:54 AM CST for Brookings County, Lake County, Moody County, South Dakota; 4 counties in Iowa; 8 counties in Minnesota. It took effect at Dec 23, 2020, 6:00 AM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 22, 2020, 3:54 AM CST (09:54 UTC)
- In effect from
- Dec 23, 2020, 6:00 AM CST
- Expired
- Dec 22, 2020, 8:31 PM CST
- In force
- Issued by
- NWS Sioux Falls, SD
Counties Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Brookings County, SD, Lake County, SD, Moody County, SD
The radar
The Sioux Falls radar (KFSD), 60 km from the middle of the area, began a volume at 09:55 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 226 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
- 864 m above ground
- 0-6 km bulk shear
- 95 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 74 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 storm watch 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 storm watch went out at Dec 22, 3:47 AM CST, 7 minutes earlier.
Area forecast discussion, Dec 22, 3:47 AM CST, 7 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 |
|---|---|---|---|---|
| Dec 22, 11:50 AM CST | Winter Weather Advisory | FSD | Aurora, Beadle, Bon Homme, Brule, Charles Mix, Clay and 15 more | 15 hr |
| Dec 22, 2:38 PM CST | Blizzard Warning | FSD | Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 18 more | 36 hr |
| Dec 22, 3:49 AM CST | Wind Advisory | FSD | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 1 more | 13 hr |
Nearby
Winter Storm Watches in Minnesota, 2020Winter Storm Watches in Iowa, 2020Winter Storm Watches in South Dakota, 2020Every winter storm watch in 2020
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.