Alert archive / Illinois / Special Weather Statements in 2014

Special Weather Statement, NWS Chicago, IL

July 7, 2014Lake County, Illinois

NWS Chicago, IL issued this special weather statement at Jul 7, 2014, 12:13 AM CDT for Lake County, Illinois. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 7, 2014, 12:13 AM CDT (05:13 UTC)
Expired: Jul 7, 2014, 1:15 AM CDT
In force: 62 min
Issued by: NWS Chicago, IL

County Lake County, IL

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 05:16 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

Davenport, (KDVN), launched 00:00Z, 5.2 hours before the alert went out and 226 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: 1325 J/kg
Mixed-layer CIN: -174 J/kg
Mixed-layer LCL: 1280 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 11:03 PM CDT	Special Weather Statement	LOT	Boone, Winnebago	42 min
Jul 6, 11:40 PM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry	35 min
Jul 6, 11:46 PM CDT	Special Marine Warning	LOT		3 hr
Jul 7, 1:12 AM CDT	Special Weather Statement	LOT	Cook, DuPage, Kendall, Will	63 min
Jul 7, 1:19 AM CDT	Special Marine Warning	LOT		3 hr
Jul 7, 1:59 AM CDT	Special Weather Statement	LOT	Grundy, Will	61 min

Nearby

Special Weather Statements in Illinois, 2014 Every special weather statement 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.