Alert archive / Wyoming / Winter Weather Advisories in 2017
Winter Weather Advisory 2, NWS Cheyenne, WY
NWS Cheyenne, WY issued this winter weather advisory at Jan 3, 2017, 2:20 PM MST for 6 counties in Wyoming; 4 counties in Nebraska. It took effect at Jan 4, 2017, 3:16 AM MST. It was in force for 26 hr.
The area
The counties it named.
The facts
- Issued
- Jan 3, 2017, 2:20 PM MST (21:20 UTC)
- In effect from
- Jan 4, 2017, 3:16 AM MST
- Expired
- Jan 5, 2017, 5:35 AM MST
- In force
- 26 hr
- Issued by
- NWS Cheyenne, WY
Counties Banner County, NE, Kimball County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 83 km from the middle of the area, began a volume at 21:18 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
Denver, CO (KDEN), launched 12:00Z, 9.3 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
- 624 m above ground
- 0-6 km bulk shear
- 113 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 430 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 weather advisory 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 weather advisory went out at Jan 3, 2:19 PM MST, 1 minute earlier.
Area forecast discussion, Jan 3, 2:19 PM MST, 1 minute before
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</html>Hazardous weather outlook, Jan 3, 3:56 AM MST, 10 hours 24 minutes before
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</html>The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 3, 2:31 AM MST | Winter Storm Watch | CYS | Albany, Carbon, Laramie, Platte | 12 hr |
Nearby
Winter Weather Advisories in Wyoming, 2017Winter Weather Advisories in Nebraska, 2017Every winter weather advisory 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.