Alert archive / Iowa / Blowing Snow Advisories in 2007

Blowing Snow Advisory 3, NWS Des Moines, IA

December 22, 200729 counties in Iowa

NWS Des Moines, IA issued this blowing snow advisory at Dec 22, 2007, 3:58 PM CST for 29 counties in Iowa. It took effect at Dec 23, 2007, 6:00 AM CST. It was in force for .

The area

The counties it named.

The facts

Issued
Dec 22, 2007, 3:58 PM CST (21:58 UTC)
In effect from
Dec 23, 2007, 6:00 AM CST
Expired
Dec 23, 2007, 4:01 AM CST
In force
Issued by
NWS Des Moines, IA
All 29 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Black Hawk County, IA, Bremer County, IA, Butler County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Grundy County, IA, Hardin County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA

The radar

The Des Moines radar (KDMX), 44 km from the middle of the area, began a volume at 21:57 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 12:00Z, 10.0 hours before the alert went out and 339 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 12:00Z on 2007-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2007-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.19395878Sfc1 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
591 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 22, 4:30 AM CSTSnow and Blowing Snow AdvisoryDMXAudubon, Boone, Calhoun, Carroll, Cass, Cerro Gordo and 12 more15 hr
Dec 22, 4:30 AM CSTWinter Storm WarningDMXAdair, Adams, Appanoose, Black Hawk, Bremer, Butler and 24 more24 hr

Nearby

Blowing Snow Advisories in Iowa, 2007Every blowing 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.