Alert archive / Nebraska / Winter Storm Warnings in 2021
Winter Storm Warning 10, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter storm warning at Apr 6, 2021, 7:17 PM MDT for Dawes County, Sioux County, Nebraska; Niobrara County, Wyoming. It was in force for 14 hr. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Apr 6, 2021, 7:17 PM MDT (01:17 UTC)
- Expired
- Apr 7, 2021, 9:00 AM MDT
- In force
- 14 hr
- Issued by
- NWS Cheyenne, WY
Counties Dawes County, NE, Sioux County, NE, Niobrara County, WY
The radar
The Rapid City radar (KUDX), 171 km from the middle of the area, began a volume at 01:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 7, 7:00 AM MDT | SNOW 2.2 | 9 Wsw Harrison, NE | CO-OP OBSERVER STATION HRNN1 HARRISON. |
| Apr 7, 7:00 AM MDT | SNOW 2.8 | 3 Wsw Chadron, NE | CO-OP OBSERVER STATION CHDN1 CHADRON 3 SW. |
| Apr 7, 7:00 AM MDT | SNOW 3 | 2 Se Chadron State Park, NE | COCORAHS STATION NE-DS-1 CHADRON 11.6 S. |
| Apr 7, 7:00 AM MDT | SNOW 4 | 9 Nne Harrison, NE | CO-OP OBSERVER STATION ZIMN1 9.1 NE HARRISON. |
| Apr 7, 8:00 AM MDT | SNOW 2.5 | 12 Se Chadron, NE | ESTIMATED 2.5 TO 3 INCHES OF SNOW |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 1.3 hours before the alert went out and 164 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
- 504 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 474 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
443 WWUS45 KCYS 070117 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 717 PM MDT Tue Apr 6 2021 ...ACCUMULATING SNOW WILL CONTINUE THROUGH EARLY WEDNESDAY ACROSS EAST CENTRAL WYOMING AND THE NORTHERN NEBRASKA PANHANDLE... NEZ002-095-WYZ102-070930- /O.UPG.KCYS.WW.Y.0025.000000T0000Z-210407T1500Z/ /O.NEW.KCYS.WS.W.0010.210407T0117Z-210407T1500Z/ Dawes County-Northern Sioux County-Niobrara County- Including the cities of Chadron, Chadron St Park, Harrison, Lusk, and Redbird 717 PM MDT Tue Apr 6 2021 ...WINTER STORM WARNING IN EFFECT UNTIL 9 AM MDT WEDNESDAY... * WHAT...Heavy snow. Additional snow accumulations of 3 to 5 inches. Total accumulations of 6 to 10 inches, locally higher along the Pine Ridge. * WHERE...Niobrara County in Wyoming including Lusk and Redbird. North Sioux and Dawes Counties in Nebraska including Harrison and Chadron. * WHEN...Until 9 AM MDT Wednesday. * IMPACTS...Roads will become snow packed and icy. Visibilities will be significantly reduced in falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ101-070930- /O.CON.KCYS.WW.Y.0025.000000T0000Z-210407T1500Z/ Converse County Lower Elevations- Including the cities of Douglas, Glenrock, Bill, and Deer Creek 717 PM MDT Tue Apr 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. Total accumulations of 4 to 6 inches with locally higher amounts. * WHERE...Converse County Lower Elevations including Douglas and Glenrock. * WHEN...Until 9 AM MDT Wednesday. * IMPACTS...Plan on hazardous road conditions and reductions in visibility in falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
3 follow-up statements
633 WWUS45 KCYS 070310 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 910 PM MDT Tue Apr 6 2021 ...SNOW WILL CONTINUE THROUGH EARLY WEDNESDAY ACROSS EAST CENTRAL WYOMING AND THE NORTHERN NEBRASKA PANHANDLE... NEZ002-095-WYZ102-071500- /O.CON.KCYS.WS.W.0010.000000T0000Z-210407T1500Z/ Dawes County-Northern Sioux County-Niobrara County- Including the cities of Chadron, Chadron St Park, Harrison, Lusk, and Redbird 910 PM MDT Tue Apr 6 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT WEDNESDAY... * WHAT...Snow. Additional snow accumulations of 1 to 3 inches. Total accumulations of 6 to 10 inches, locally higher along the Pine Ridge. * WHERE...Niobrara County in Wyoming including Lusk and Redbird. North Sioux and Dawes Counties in Nebraska including Harrison and Chadron. * WHEN...Until 9 AM MDT Wednesday. * IMPACTS...Roads will be snow packed and icy. Visibilities will be significantly reduced in falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ WYZ101-071500- /O.CON.KCYS.WW.Y.0025.000000T0000Z-210407T1500Z/ Converse County Lower Elevations- Including the cities of Douglas, Glenrock, Bill, and Deer Creek 910 PM MDT Tue Apr 6 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT WEDNESDAY... * WHAT...Snow. Additional snow accumulations up to 1 inch. Total accumulations of 4 to 6 inches with locally higher amounts. * WHERE...Converse County Lower Elevations including Douglas and Glenrock. * WHEN...Until 9 AM MDT Wednesday. * IMPACTS...Plan on hazardous road conditions and reductions in visibility in falling snow. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
743 WWUS45 KCYS 070809 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 209 AM MDT Wed Apr 7 2021 ...LIGHT SNOW WILL CONTINUE THROUGH EARLY WEDNESDAY ACROSS EAST CENTRAL WYOMING AND THE NORTHERN NEBRASKA PANHANDLE... WYZ101-070915- /O.CAN.KCYS.WW.Y.0025.000000T0000Z-210407T1500Z/ Converse County Lower Elevations- Including the cities of Douglas, Glenrock, Bill, and Deer Creek 209 AM MDT Wed Apr 7 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snowfall has mostly ended across much of east-central Wyoming early this morning. Light snow will be possible over the next few hours, but little to no accumulation is expected. Therefore, the Winter Weather Advisory has been cancelled for Converse County. $$ NEZ002-095-WYZ102-071500- /O.CON.KCYS.WS.W.0010.000000T0000Z-210407T1500Z/ Dawes County-Northern Sioux County-Niobrara County- Including the cities of Chadron, Chadron St Park, Harrison, Lusk, and Redbird 209 AM MDT Wed Apr 7 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS MORNING... * WHAT...Snow. Additional snow accumulations up to 1 inch. * WHERE...Niobrara County in Wyoming including Lusk and Redbird. Northern Sioux and Dawes Counties in Nebraska including Harrison and Chadron. * WHEN...Until 9 AM MDT Wednesday. * IMPACTS...Plan on slippery road conditions and reductions in visibility early this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ Brothers
168 WWUS45 KCYS 071500 WSWCYS URGENT - WINTER WEATHER MESSAGE National Weather Service Cheyenne WY 900 AM MDT Wed Apr 7 2021 NEZ002-095-WYZ102-071600- /O.EXP.KCYS.WS.W.0010.000000T0000Z-210407T1500Z/ Dawes County-Northern Sioux County-Niobrara County- Including the cities of Chadron, Chadron St Park, Harrison, Lusk, and Redbird 900 AM MDT Wed Apr 7 2021 ...WINTER STORM WARNING WILL EXPIRE AT 9 AM MDT THIS MORNING... Periods of light snow may continue this morning. However, little if any additional accumulation is expected. Slick road conditions may still exist, especially on less traveled routes. $$ CLH
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 2:18 AM MDT | Fire Weather Watch | CYS | 17 hr |
Nearby
Winter Storm Warnings in Nebraska, 2021Winter Storm Warnings in Wyoming, 2021Every winter storm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.