Alert archive / Nebraska / Wind Chill Advisories in 2009

Wind Chill Advisory 1, NWS North Platte, NE

January 14, 20098 counties in Nebraska

NWS North Platte, NE issued this wind chill advisory at Jan 14, 2009, 2:58 AM CST for 8 counties in Nebraska. It took effect at Jan 14, 2009, 6:00 AM CST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Jan 14, 2009, 2:58 AM CST (08:58 UTC)
In effect from: Jan 14, 2009, 6:00 AM CST
Expired: Jan 14, 2009, 12:40 PM CST
In force: 7 hr
Issued by: NWS North Platte, NE

Counties Boyd County, NE, Brown County, NE, Cherry County, NE, Garfield County, NE, Holt County, NE, Keya Paha County, NE, Rock County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 110 km from the middle of the area, began a volume at 09:00 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, 9.0 hours before the alert went out and 175 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: 2380 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 289 m²/s²
0-3 km storm-relative helicity: 355 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 North Platte, NE wrote its last area forecast discussion before this wind chill advisory went out at Jan 13, 8:55 PM CST, 6 hours 3 minutes earlier.

Area forecast discussion, Jan 13, 8:55 PM CST, 6 hours 3 minutes before

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Hazardous weather outlook, Jan 13, 9:23 PM CST, 5 hours 35 minutes before

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In the hours before

Local storm report, Jan 14, 1:56 AM CST, 1 hour 2 minutes before

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The office that day

Everything else NWS North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 14, 2:58 AM CST	Wind Advisory	LBF	Arthur, Blaine, Chase, Custer, Frontier, Grant and 9 more	7 hr
Jan 14, 4:40 PM CST	Wind Chill Advisory	LBF	Blaine, Boyd, Brown, Cherry, Garfield, Holt and 4 more	9 hr

Nearby

Wind Chill Advisories in Nebraska, 2009 Every wind chill advisory in 2009

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.