Alert archive / Indiana / Lake Effect Snow Warnings in 2010

Lake Effect Snow Warning 4, NWS Northern Indiana

December 4, 2010Elkhart County, Marshall County, Starke County, Indiana; Cass County, Michigan

NWS Northern Indiana issued this lake effect snow warning at Dec 4, 2010, 4:49 AM EST for Elkhart County, Marshall County, Starke County, Indiana; Cass County, Michigan. It took effect at Dec 4, 2010, 9:00 PM EST. It was in force for 70 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
Dec 4, 2010, 4:49 AM EST (09:49 UTC)
In effect from
Dec 4, 2010, 9:00 PM EST
Expired
Dec 7, 2010, 7:00 PM EST
In force
70 hr
Issued by
NWS Northern Indiana

Counties Elkhart County, IN, Marshall County, IN, Starke County, IN, Cass County, MI

The radar

The Northern Indiana radar (KIWX), 45 km from the middle of the area, began a volume at 09:46 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

Lincoln, IL (KILX), launched 00:00Z, 9.8 hours before the alert went out and 254 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, Lincoln, IL at 00:00Z on 2010-12-04Temperature 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, Lincoln, IL at 00:00Z on 2010-12-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939587897117136Sfc1 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
1391 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
316 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 3, 10:40 PM ESTSmall Craft AdvisoryIWX5 days
Dec 4, 4:49 AM ESTLake Effect Snow AdvisoryIWXAllen, DeKalb, LaGrange, Marshall, Noble, Starke and 2 more4 days

Nearby

Lake Effect Snow Warnings in Indiana, 2010Lake Effect Snow Warnings in Michigan, 2010Every lake effect snow warning in 2010

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.