Alert archive / Illinois / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 24, NWS Chicago, IL

June 14, 2016Lee County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Jun 14, 2016, 3:49 PM CDT for Lee County, Illinois. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 14, 2016, 3:49 PM CDT (20:49 UTC)
Expired: Jun 14, 2016, 4:15 PM CDT
In force: 26 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lee County, IL

The radar

The Chicago radar (KLOT), 102 km from the middle of the area, began a volume at 20:51 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 12:00Z, 8.8 hours before the alert went out and 101 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: 569 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 989 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 80 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 14, 3:12 PM CDT, 37 minutes earlier.

Area forecast discussion, Jun 14, 3:12 PM CDT, 37 minutes before

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Hazardous weather outlook, Jun 14, 1:22 PM CDT, 2 hours 27 minutes before

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In the hours before

Special weather statement, Jun 14, 2:28 PM CDT, 1 hour 21 minutes before

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Special weather statement, Jun 14, 2:33 PM CDT, 1 hour 16 minutes before

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Special weather statement, Jun 14, 2:55 PM CDT, 54 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 13, 10:52 PM CDT	Areal Flood Advisory	LOT	DeKalb, LaSalle, Lee	3 hr
Jun 14, 12:35 AM CDT	Areal Flood Advisory	LOT	Grundy, Kankakee, Will	4 hr
Jun 14, 3:05 AM CDT	Areal Flood Advisory	LOT	Grundy, LaSalle, Livingston	4 hr
Jun 14, 5:55 AM CDT	Areal Flood Advisory	LOT	DeKalb, Lee, Ogle	4 hr
Jun 14, 2:28 PM CDT	Special Weather Statement	LOT	Ford	47 min
Jun 14, 2:33 PM CDT	Special Weather Statement	LOT	Ford	42 min
Jun 14, 2:55 PM CDT	Special Weather Statement	LOT	Grundy	20 min
Jun 14, 4:59 PM CDT	Areal Flood Advisory	LOT	DuPage	2 hr
Jun 14, 5:49 PM CDT	Severe Thunderstorm Warning	LOT	Ogle	26 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2016 Every severe thunderstorm warning 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.