Alert archive / Nebraska / Wind Chill Advisories in 2018

Wind Chill Advisory 1, NWS Cheyenne, WY

January 1, 2018Goshen County, Wyoming; 7 counties in Nebraska

NWS Cheyenne, WY issued this wind chill advisory at Jan 1, 2018, 2:06 PM MST for Goshen County, Wyoming; 7 counties in Nebraska. It took effect at Jan 1, 2018, 9:00 PM MST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jan 1, 2018, 2:06 PM MST (21:06 UTC)
In effect from: Jan 1, 2018, 9:00 PM MST
Expired: Jan 2, 2018, 2:52 AM MST
In force: 6 hr
Issued by: NWS Cheyenne, WY

Counties Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE, Goshen County, WY

The radar

The Cheyenne radar (KCYS), 144 km from the middle of the area, began a volume at 21:10 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 9.1 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.

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: 610 m above ground
0-6 km bulk shear: 86 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 261 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 Cheyenne, WY wrote its last area forecast discussion before this wind chill advisory went out at Jan 1, 10:46 AM MST, 3 hours 20 minutes earlier.

Area forecast discussion, Jan 1, 10:46 AM MST, 3 hours 20 minutes before

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Hazardous weather outlook, Jan 1, 6:53 AM MST, 7 hours 13 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 1, 2:41 AM MST	Freezing Fog Advisory	CYS	Albany, Converse, Laramie, Platte	6 hr

Nearby

Wind Chill Advisories in Nebraska, 2018 Wind Chill Advisories in Wyoming, 2018 Every wind chill advisory in 2018

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.