Alert archive / Minnesota / Winter Storm Watches in 2021
Winter Storm Watch 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this winter storm watch at Nov 11, 2021, 3:11 AM CST for 5 counties in Minnesota; Brookings County, South Dakota. It took effect at Nov 11, 2021, 9:00 PM CST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 11, 2021, 3:11 AM CST (09:11 UTC)
- In effect from
- Nov 11, 2021, 9:00 PM CST
- Expired
- Nov 11, 2021, 11:23 AM CST
- In force
- Issued by
- NWS Sioux Falls, SD
Counties Cottonwood County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Pipestone County, MN, Brookings County, SD
The radar
The Sioux Falls radar (KFSD), 90 km from the middle of the area, began a volume at 09:14 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
Aberdeen, SD (KABR), launched 00:00Z, 9.2 hours before the alert went out and 204 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
- 559 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -88 m²/s²
- 0-3 km storm-relative helicity
- -87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
189 WWUS43 KFSD 110911 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 311 AM CST Thu Nov 11 2021 IAZ001>003-012>014-MNZ089-090-098-SDZ038-039-053>056-061-062-067- 111800- /O.NEW.KFSD.WW.Y.0012.211112T0300Z-211112T1800Z/ Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Nobles-Jackson-Rock- Beadle-Kingsbury-Sanborn-Miner-Lake-Moody-McCook-Minnehaha- Lincoln- 311 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations ranging from half an inch to two inches. Winds gusting as high as 50 mph. * WHERE...Portions of east central and southeast South Dakota, northwest Iowa and southwest Minnesota. This includes the tribal lands of the Flandreau Santee Sioux Tribal Nation. * WHEN...From 9 PM this evening to noon CST Friday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ MNZ071-072-080-081-097-SDZ040-111800- /O.NEW.KFSD.WS.A.0004.211112T0300Z-211112T1800Z/ Lincoln-Lyon-Murray-Cottonwood-Pipestone-Brookings- 311 AM CST Thu Nov 11 2021 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH FRIDAY MORNING... * WHAT...Blizzard conditions possible. Total snow accumulations of 1 to 3 inches possible. Winds could gust as high as 50 mph. * WHERE...Portions of east central South Dakota and southwest Minnesota. * WHEN...From this evening through Friday morning. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Prepare for possible blizzard conditions. Continue to monitor the latest forecasts for updates on this situation. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
1 follow-up statement
592 WWUS43 KFSD 111723 WSWFSD URGENT - WINTER WEATHER MESSAGE National Weather Service Sioux Falls SD 1123 AM CST Thu Nov 11 2021 MNZ071-072-080-081-097-SDZ040-120200- /O.UPG.KFSD.WS.A.0004.211112T0300Z-211112T1800Z/ /O.EXA.KFSD.WW.Y.0012.211112T0300Z-211112T1800Z/ Lincoln-Lyon-Murray-Cottonwood-Pipestone-Brookings- 1123 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON CST FRIDAY... * WHAT...Snow and blowing snow expected. Total snow accumulations of 1 to 3 inches. Winds gusting as high as 50 mph. * WHERE...Portions of east central South Dakota and southwest Minnesota. * WHEN...From 9 PM this evening to noon CST Friday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility, with intermittent near blizzard conditions possible. The hazardous conditions will likely impact the morning commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ IAZ001>003-012>014-MNZ089-090-098-SDZ038-039-053>056-061-062-067- 120200- /O.CON.KFSD.WW.Y.0012.211112T0300Z-211112T1800Z/ Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Nobles-Jackson-Rock- Beadle-Kingsbury-Sanborn-Miner-Lake-Moody-McCook-Minnehaha- Lincoln- 1123 AM CST Thu Nov 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO NOON CST FRIDAY... * WHAT...Snow expected. Total snow accumulations ranging from half an inch to two inches. Winds gusting as high as 50 mph. * WHERE...Portions of east central and southeast South Dakota, northwest Iowa and southwest Minnesota. This includes the tribal lands of the Flandreau Santee Sioux Tribal Nation. * WHEN...From 9 PM this evening to noon CST Friday. * IMPACTS...Plan on slippery road conditions. Patchy blowing snow could significantly reduce visibility. The hazardous conditions will likely impact the morning commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 3:11 AM CST | Winter Weather Advisory | FSD | Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more | 33 hr |
| Nov 11, 2:42 PM CST | Wind Advisory | FSD | Beadle, Bon Homme, Davison, Hanson, Hutchinson, Sanborn and 1 more | 27 hr |
Nearby
Winter Storm Watches in Minnesota, 2021Winter Storm Watches in South Dakota, 2021Every winter storm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.