Alert archive / Nebraska / Snow Advisories in 2007

Snow Advisory 9, NWS Omaha, NE

December 27, 20076 counties in Nebraska; Fremont County, Montgomery County, Page County, Iowa

NWS Omaha, NE issued this snow advisory at Dec 27, 2007, 4:00 AM CST for 6 counties in Nebraska; Fremont County, Montgomery County, Page County, Iowa. It took effect at Dec 27, 2007, 2:54 PM CST. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued
Dec 27, 2007, 4:00 AM CST (10:00 UTC)
In effect from
Dec 27, 2007, 2:54 PM CST
Expired
Dec 28, 2007, 11:03 AM CST
In force
20 hr
Issued by
NWS Omaha, NE

Counties Fremont County, IA, Montgomery County, IA, Page County, IA, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 103 km from the middle of the area, began a volume at 10:04 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

Topeka, KS (KTOP), launched 00:00Z, 10.0 hours before the alert went out and 163 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-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2007-12-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2007-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -33 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
535 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
-33 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 26, 7:39 PM CSTDense Fog AdvisoryOAXAntelope, Boone, Burt, Butler, Cass, Cedar and 20 more13 hr

Nearby

Snow Advisories in Nebraska, 2007Snow Advisories in Iowa, 2007Every snow advisory in 2007

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.