Alert archive / Illinois / Special Weather Statements in 2014

Special Weather Statement, NWS Lincoln, IL

August 20, 2014Macon County, Illinois

NWS Lincoln, IL issued this special weather statement at Aug 20, 2014, 9:29 AM CDT for Macon County, Illinois. It was in force for 61 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: Aug 20, 2014, 9:29 AM CDT (14:29 UTC)
Expired: Aug 20, 2014, 10:30 AM CDT
In force: 61 min
Issued by: NWS Lincoln, IL

County Macon County, IL

The radar

The Lincoln radar (KILX), 61 km from the middle of the area, began a volume at 14:30 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, 2.5 hours before the alert went out and 55 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: 227 J/kg
Mixed-layer CIN: -226 J/kg
Mixed-layer LCL: 1209 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 200 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

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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 Aug 20, 6:40 AM CDT, 2 hours 49 minutes earlier.

Area forecast discussion, Aug 20, 6:40 AM CDT, 2 hours 49 minutes before

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Hazardous weather outlook, Aug 20, 6:04 AM CDT, 3 hours 25 minutes before

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In the hours before

Special weather statement, Aug 20, 4:53 AM CDT, 4 hours 36 minutes before

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Local storm report, Aug 20, 8:56 AM CDT, 33 minutes before

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Special weather statement, Aug 20, 9:29 AM CDT, 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
Aug 20, 10:30 AM CDT	Special Weather Statement	ILX	Douglas, Edgar	60 min
Aug 20, 11:30 AM CDT	Areal Flood Advisory	ILX	Sangamon	3 hr

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.