Alert archive / Illinois / Special Weather Statements in 2017

Special Weather Statement, NWS Lincoln, IL

November 18, 20174 counties in Illinois

NWS Lincoln, IL issued this special weather statement at Nov 18, 2017, 12:07 PM CST for 4 counties in Illinois. It was in force for 53 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: Nov 18, 2017, 12:07 PM CST (18:07 UTC)
Expired: Nov 18, 2017, 1:00 PM CST
In force: 53 min
Issued by: NWS Lincoln, IL

Counties Clay County, IL, Crawford County, IL, Jasper County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 79 km from the middle of the area, began a volume at 18:08 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 12:00Z, 6.1 hours before the alert went out and 145 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: 599 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 268 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Nov 18, 11:52 AM CST, 15 minutes earlier.

Area forecast discussion, Nov 18, 11:52 AM CST, 15 minutes before

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Hazardous weather outlook, Nov 18, 11:36 AM CST, 31 minutes before

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In the hours before

Special weather statement, Nov 18, 11:18 AM CST, 49 minutes before

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Local storm report, Nov 18, 11:22 AM CST, 45 minutes before

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Local storm report, Nov 18, 11:49 AM CST, 18 minutes before

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Local storm report, Nov 18, 11:59 AM CST, 8 minutes before

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Local storm report, Nov 18, 12:06 PM CST, 1 minute before

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Special weather statement, Nov 18, 12:07 PM CST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 18, 6:43 AM CST	Special Weather Statement	ILX	Mason, Tazewell	47 min
Nov 18, 7:20 AM CST	Special Weather Statement	ILX	McLean	40 min
Nov 18, 8:20 AM CST	Flash Flood Warning	ILX	DeWitt, Logan, McLean	6 hr
Nov 18, 8:52 AM CST	Flash Flood Warning	ILX	Logan, McLean, Mason, Menard, Tazewell	6 hr
Nov 18, 8:59 AM CST	Flash Flood Warning	ILX	Champaign, DeWitt, McLean, Piatt, Vermilion	6 hr
Nov 18, 10:10 AM CST	Special Weather Statement	ILX	Coles, Douglas, Edgar, Moultrie, Shelby, Vermilion	65 min
Nov 18, 11:18 AM CST	Special Weather Statement	ILX	Clark, Crawford, Cumberland, Effingham, Jasper	57 min

Nearby

Special Weather Statements in Illinois, 2017 Every special weather statement 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.