Alert archive / Minnesota / Winter Storm Watches in 2020

Winter Storm Watch 2, NWS Sioux Falls, SD

February 7, 20206 counties in South Dakota; Dickinson County, Iowa; 8 counties in Minnesota

NWS Sioux Falls, SD issued this winter storm watch at Feb 7, 2020, 3:08 AM CST for 6 counties in South Dakota; Dickinson County, Iowa; 8 counties in Minnesota. It took effect at Feb 8, 2020, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 7, 2020, 3:08 AM CST (09:08 UTC)
In effect from: Feb 8, 2020, 6:00 PM CST
Expired: Feb 8, 2020, 3:37 AM CST
In force
Issued by: NWS Sioux Falls, SD

Counties Dickinson 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, Beadle County, SD, Brookings County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD, Moody County, SD

The radar

The Sioux Falls radar (KFSD), 57 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.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 9.1 hours before the alert went out and 238 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1375 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Feb 6, 10:49 PM CST, 4 hours 19 minutes earlier.

Area forecast discussion, Feb 6, 10:49 PM CST, 4 hours 19 minutes before

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Nearby

Winter Storm Watches in Minnesota, 2020 Winter Storm Watches in South Dakota, 2020 Winter Storm Watches in Iowa, 2020 Every 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.