Alert archive / Nebraska / Wind Chill Advisories in 2010

Wind Chill Advisory 2, NWS Cheyenne, WY

January 7, 20108 counties in Nebraska

NWS Cheyenne, WY issued this wind chill advisory at Jan 7, 2010, 2:45 AM MST for 8 counties in Nebraska. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued: Jan 7, 2010, 2:45 AM MST (09:45 UTC)
Expired: Jan 7, 2010, 8:56 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, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sioux County, NE

The radar

The Cheyenne radar (KCYS), 142 km from the middle of the area, began a volume at 09:44 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 00:00Z, 9.8 hours before the alert went out and 246 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: 935 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: -424 m²/s²
0-3 km storm-relative helicity: -114 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 7, 2:30 AM MST, 15 minutes earlier.

Area forecast discussion, Jan 7, 2:30 AM MST, 15 minutes before

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Hazardous weather outlook, Jan 6, 6:20 PM MST, 8 hours 25 minutes before

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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 7, 1:49 PM MST	Wind Chill Warning	CYS	Albany, Carbon, Converse, Goshen, Laramie, Niobrara and 1 more	21 hr
Jan 7, 1:49 PM MST	Wind Chill Advisory	CYS	Albany, Carbon, Laramie, Platte	21 hr

Nearby

Wind Chill Advisories in Nebraska, 2010 Every wind chill advisory in 2010

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.