Alert archive / Nebraska / Winter Storm Watches in 2017

Winter Storm Watch 5, NWS North Platte, NE

April 29, 201710 counties in Nebraska

NWS North Platte, NE issued this winter storm watch at Apr 29, 2017, 4:27 AM CDT for 10 counties in Nebraska. It took effect at Apr 30, 2017, 1:00 AM CDT. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2017, 4:27 AM CDT (09:27 UTC)
In effect from: Apr 30, 2017, 1:00 AM CDT
Expired: Apr 30, 2017, 4:18 AM CDT
In force: 3 hr
Issued by: NWS North Platte, NE

Counties Blaine County, NE, Custer County, NE, Garfield County, NE, Hayes County, NE, Holt County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Rock County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 76 km from the middle of the area, began a volume at 09:29 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, 9.5 hours before the alert went out and 97 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: 655 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 149 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 winter storm watch 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 winter storm watch went out at Apr 29, 4:16 AM CDT, 11 minutes earlier.

Area forecast discussion, Apr 29, 4:16 AM CDT, 11 minutes before

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Hazardous weather outlook, Apr 28, 6:01 PM CDT, 10 hours 26 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
Apr 29, 4:27 AM CDT	Winter Storm Warning	LBF	Custer, Frontier	42 hr
Apr 29, 4:02 PM CDT	Winter Weather Advisory	LBF	Blaine, Custer, Garfield, Hayes, Holt, Lincoln and 4 more	31 hr

Nearby

Winter Storm Watches in Nebraska, 2017 Every 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.