Alert archive / Nebraska / Blizzard Watches in 2009

Blizzard Watch 2, NWS Omaha, NE

December 7, 200930 counties in Nebraska; 8 counties in Iowa

NWS Omaha, NE issued this blizzard watch at Dec 7, 2009, 3:45 PM CST for 30 counties in Nebraska; 8 counties in Iowa. It took effect at Dec 8, 2009, 6:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Dec 7, 2009, 3:45 PM CST (21:45 UTC)
In effect from: Dec 8, 2009, 6:00 PM CST
Expired: Dec 8, 2009, 12:55 PM CST
In force
Issued by: NWS Omaha, NE

All 38 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Pierce County, NE, Platte County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 16 km from the middle of the area, began a volume at 21:48 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, 9.8 hours before the alert went out and 16 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: 612 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: -5 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 blizzard 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 blizzard watch went out at Dec 7, 3:56 AM CST, 11 hours 49 minutes earlier.

Area forecast discussion, Dec 7, 3:56 AM CST, 11 hours 49 minutes before

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Hazardous weather outlook, Dec 7, 12:40 PM CST, 3 hours 5 minutes before

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In the hours before

Local storm report, Dec 7, 11:38 AM CST, 4 hours 7 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
Dec 7, 4:04 AM CST	Winter Storm Warning	OAX	Antelope, Boone, Burt, Butler, Cass, Cedar and 24 more	41 hr

Nearby

Blizzard Watches in Nebraska, 2009 Blizzard Watches in Iowa, 2009 Every blizzard watch 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.