Alert archive / South Dakota / Wind Chill Advisories in 2019

Wind Chill Advisory 1, NWS Sioux Falls, SD

January 18, 201918 counties in South Dakota; Lyon County, Osceola County, Iowa; 8 counties in Minnesota

NWS Sioux Falls, SD issued this wind chill advisory at Jan 18, 2019, 2:50 PM CST for 18 counties in South Dakota; Lyon County, Osceola County, Iowa; 8 counties in Minnesota. It took effect at Jan 19, 2019, 1:00 AM CST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued: Jan 18, 2019, 2:50 PM CST (20:50 UTC)
In effect from: Jan 19, 2019, 1:00 AM CST
Expired: Jan 19, 2019, 10:00 AM CST
In force: 9 hr
Issued by: NWS Sioux Falls, SD

All 28 counties

Lyon County, IA, Osceola 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, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD

The radar

The Sioux Falls radar (KFSD), 37 km from the middle of the area, began a volume at 20:47 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 12:00Z, 8.8 hours before the alert went out and 295 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: 1227 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: 117 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 wind chill 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 wind chill advisory went out at Jan 17, 5:23 PM CST, 21 hours 27 minutes earlier.

Area forecast discussion, Jan 17, 5:23 PM CST, 21 hours 27 minutes before

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Hazardous weather outlook, Jan 17, 4:23 PM CST, 22 hours 27 minutes before

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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Nearby

Wind Chill Advisories in South Dakota, 2019 Wind Chill Advisories in Minnesota, 2019 Wind Chill Advisories in Iowa, 2019 Every wind chill advisory in 2019

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.