Alert archive / Illinois / Winter Storm Watches in 2014

Winter Storm Watch 4, NWS Lincoln, IL

February 28, 201428 counties in Illinois

NWS Lincoln, IL issued this winter storm watch at Feb 28, 2014, 3:24 AM CST for 28 counties in Illinois. It took effect at Mar 1, 2014, 9:00 PM CST. It was in force for .

The area

The counties it named.

The facts

Issued: Feb 28, 2014, 3:24 AM CST (09:24 UTC)
In effect from: Mar 1, 2014, 9:00 PM CST
Expired: Mar 1, 2014, 3:04 PM CST
In force
Issued by: NWS Lincoln, IL

All 28 counties

Cass County, IL, Champaign County, IL, Christian County, IL, Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 71 km from the middle of the area, began a volume at 09:22 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, 9.4 hours before the alert went out and 60 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: 1741 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 88 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 winter storm watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lincoln, IL wrote its last area forecast discussion before this winter storm watch went out at Feb 27, 11:23 PM CST, 4 hours 1 minute earlier.

Area forecast discussion, Feb 27, 11:23 PM CST, 4 hours 1 minute before

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Nearby

Winter Storm Watches in Illinois, 2014 Every winter storm watch in 2014

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.