Alert archive / Nebraska / Winter Storm Watches in 2017
Winter Storm Watch 7, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter storm watch at Feb 21, 2017, 3:28 AM MST for 7 counties in Wyoming; 8 counties in Nebraska. It took effect at Feb 22, 2017, 5:00 AM MST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Feb 21, 2017, 3:28 AM MST (10:28 UTC)
- In effect from
- Feb 22, 2017, 5:00 AM MST
- Expired
- Feb 22, 2017, 1:45 PM MST
- In force
- 9 hr
- Issued by
- NWS Cheyenne, WY
Counties Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 104 km from the middle of the area, began a volume at 10:27 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
Rapid City, SD (KRAP), launched 00:00Z, 10.5 hours before the alert went out and 257 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
- 3254 m above ground
- 0-6 km bulk shear
- 70 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 100 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 Cheyenne, WY wrote its last area forecast discussion before this winter storm watch went out at Feb 20, 10:17 PM MST, 5 hours 11 minutes earlier.
Area forecast discussion, Feb 20, 10:17 PM MST, 5 hours 11 minutes before
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</html>Hazardous weather outlook, Feb 20, 11:14 AM MST, 16 hours 14 minutes before
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Local storm report, Feb 21, 1:40 AM MST, 1 hour 48 minutes before
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</html>Local storm report, Feb 21, 3:00 AM MST, 28 minutes before
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</html>Nearby
Winter Storm Watches in Nebraska, 2017Winter Storm Watches in Wyoming, 2017Every winter storm watch in 2017
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.