Alert archive / Iowa / Winter Storm Warnings in 2019

Winter Storm Warning 2, NWS Omaha, NE

January 17, 2019Nemaha County, Richardson County, Nebraska; 6 counties in Iowa

NWS Omaha, NE issued this winter storm warning at Jan 17, 2019, 2:49 PM CST for Nemaha County, Richardson County, Nebraska; 6 counties in Iowa. It took effect at Jan 18, 2019, 9:00 AM CST. It was in force for 13 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jan 17, 2019, 2:49 PM CST (20:49 UTC)
In effect from: Jan 18, 2019, 9:00 AM CST
Expired: Jan 18, 2019, 10:17 PM CST
In force: 13 hr
Issued by: NWS Omaha, NE

Counties Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Nemaha County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 88 km from the middle of the area, began a volume at 20:52 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, 8.8 hours before the alert went out and 88 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: 532 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 102 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 warning 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 warning went out at Jan 17, 11:27 AM CST, 3 hours 22 minutes earlier.

Area forecast discussion, Jan 17, 11:27 AM CST, 3 hours 22 minutes before

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Hazardous weather outlook, Jan 17, 10:45 AM CST, 4 hours 4 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 17, 3:38 AM CST	Winter Weather Advisory	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	48 hr

Nearby

Winter Storm Warnings in Iowa, 2019 Winter Storm Warnings in Nebraska, 2019 Every winter storm warning in 2019

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.