Alert archive / Illinois / Freeze Watches in 2016

Freeze Watch 2, NWS Lincoln, IL

April 7, 201635 counties in Illinois

NWS Lincoln, IL issued this freeze watch at Apr 7, 2016, 3:40 AM CDT for 35 counties in Illinois. It took effect at Apr 9, 2016, 1:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued: Apr 7, 2016, 3:40 AM CDT (08:40 UTC)
In effect from: Apr 9, 2016, 1:00 AM CDT
Expired: Apr 8, 2016, 2:56 AM CDT
In force
Issued by: NWS Lincoln, IL

All 35 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, Fulton County, IL, Jasper County, IL, Knox County, IL, Lawrence County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Richland County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 42 km from the middle of the area, began a volume at 08:43 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, 8.7 hours before the alert went out and 46 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: 27 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze 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 freeze watch went out at Apr 6, 11:09 PM CDT, 4 hours 31 minutes earlier.

Area forecast discussion, Apr 6, 11:09 PM CDT, 4 hours 31 minutes before

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Hazardous weather outlook, Apr 6, 3:14 PM CDT, 12 hours 26 minutes before

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Nearby

Freeze Watches in Illinois, 2016 Every freeze watch in 2016

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.