Alert archive / Nebraska / Ice Storm Warnings in 2011
Ice Storm Warning 1, NWS Omaha, NE
NWS Omaha, NE issued this ice storm warning at Feb 19, 2011, 3:27 PM CST for 4 counties in Nebraska. It took effect at Feb 20, 2011, 12:00 AM CST. It was in force for 4 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
- Feb 19, 2011, 3:27 PM CST (21:27 UTC)
- In effect from
- Feb 20, 2011, 12:00 AM CST
- Expired
- Feb 20, 2011, 4:29 AM CST
- In force
- 4 hr
- Issued by
- NWS Omaha, NE
Counties Antelope County, NE, Cedar County, NE, Knox County, NE, Pierce County, NE
The radar
The Sioux Falls radar (KFSD), 152 km from the middle of the area, began a volume at 21:27 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 165 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1527 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 358 m²/s²
- 0-3 km storm-relative helicity
- 416 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this ice 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 ice storm warning went out at Feb 19, 3:05 PM CST, 22 minutes earlier.
Area forecast discussion, Feb 19, 3:05 PM CST, 22 minutes before
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<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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</html>The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 18, 8:22 PM CST | Areal Flood Warning | OAX | Stanton | 24 hr |
| Feb 18, 8:34 PM CST | Areal Flood Advisory | OAX | Butler, Colfax, Dodge, Douglas, Sarpy, Saunders | 24 hr |
| Feb 19, 4:20 AM CST | Winter Storm Watch | OAX | Antelope, Cedar, Knox, Pierce | 11 hr |
| Feb 19, 9:45 AM CST | Areal Flood Advisory | OAX | Platte | 24 hr |
| Feb 19, 5:55 PM CST | Areal Flood Advisory | OAX | Cuming | 24 hr |
Nearby
Ice Storm Warnings in Nebraska, 2011Every ice storm warning in 2011
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.