Alert archive / Illinois / Freezing Rain Advisories in 2017

Freezing Rain Advisory 1, NWS Lincoln, IL

January 12, 201716 counties in Illinois

NWS Lincoln, IL issued this freezing rain advisory at Jan 12, 2017, 4:00 AM CST for 16 counties in Illinois. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Jan 12, 2017, 4:00 AM CST (10:00 UTC)
Expired
Jan 12, 2017, 9:00 AM CST
In force
5 hr
Issued by
NWS Lincoln, IL

Counties Cass County, IL, Fulton County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 47 km from the middle of the area, began a volume at 10:00 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, 10.0 hours before the alert went out and 106 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 2017-01-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 joules per kilogram.LCLLFCEL10008507005003002001001 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 2017-01-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 630 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
48 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
735 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
630 m²/s²
0-3 km storm-relative helicity
688 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 11, 7:36 PM CSTSpecial Weather StatementILXMcLean39 min
Jan 11, 9:14 PM CSTSpecial Weather StatementILXChampaign, Vermilion61 min
Jan 12, 4:13 AM CSTWinter Storm WatchILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more59 hr

Nearby

Freezing Rain Advisories in Illinois, 2017Every freezing rain advisory in 2017

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.