Alert archive / Nebraska / Winter Storm Watches in 2021

Winter Storm Watch 1, NWS Omaha, NE

January 13, 202114 counties in Nebraska; Harrison County, Monona County, Shelby County, Iowa

NWS Omaha, NE issued this winter storm watch at Jan 13, 2021, 3:30 PM CST for 14 counties in Nebraska; Harrison County, Monona County, Shelby County, Iowa. It took effect at Jan 15, 2021, 12:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 13, 2021, 3:30 PM CST (21:30 UTC)
In effect from: Jan 15, 2021, 12:00 AM CST
Expired: Jan 14, 2021, 2:49 PM CST
In force
Issued by: NWS Omaha, NE

Counties Harrison County, IA, Monona County, IA, Shelby County, IA, Burt County, NE, Cass County, NE, Cedar County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Nemaha County, NE, Otoe County, NE, Richardson County, NE, Sarpy County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 22 km from the middle of the area, began a volume at 21:30 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

Omaha, NE (KOAX), launched 12:00Z, 9.5 hours before the alert went out and 22 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: 2599 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 146 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 Omaha, NE wrote its last area forecast discussion before this winter storm watch went out at Jan 13, 5:29 AM CST, 10 hours 1 minute earlier.

Area forecast discussion, Jan 13, 5:29 AM CST, 10 hours 1 minute before

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Hazardous weather outlook, Jan 13, 11:25 AM CST, 4 hours 5 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 13, 3:47 AM CST	High Wind Watch	OAX	Antelope, Boone, Cedar, Knox, Madison, Pierce and 3 more	12 hr
Jan 13, 3:30 PM CST	High Wind Warning	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	51 hr
Jan 13, 3:30 PM CST	Wind Advisory	OAX	Burt, Butler, Cass, Colfax, Cuming, Dodge and 18 more	33 hr

Nearby

Winter Storm Watches in Nebraska, 2021 Winter Storm Watches in Iowa, 2021 Every winter storm watch in 2021

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.