Alert archive / Illinois / Special Weather Statements in 2011

Special Weather Statement, NWS Lincoln, IL

April 22, 2011Macon County, Illinois

NWS Lincoln, IL issued this special weather statement at Apr 22, 2011, 10:41 AM CDT for Macon County, Illinois. It was in force for 34 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: Apr 22, 2011, 10:41 AM CDT (15:41 UTC)
Expired: Apr 22, 2011, 11:15 AM CDT
In force: 34 min
Issued by: NWS Lincoln, IL

County Macon County, IL

The radar

The Lincoln radar (KILX), 40 km from the middle of the area, began a volume at 15:42 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, 3.7 hours before the alert went out and 68 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: 845 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 585 m²/s²
0-3 km storm-relative helicity: 683 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Apr 22, 10:39 AM CDT, 2 minutes earlier.

Area forecast discussion, Apr 22, 10:39 AM CDT, 2 minutes before

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Hazardous weather outlook, Apr 22, 6:00 AM CDT, 4 hours 41 minutes before

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In the hours before

Local storm report, Apr 22, 9:51 AM CDT, 50 minutes before

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Local storm report, Apr 22, 10:04 AM CDT, 37 minutes before

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Special weather statement, Apr 22, 10:41 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
Apr 22, 8:48 AM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	27 min
Apr 22, 12:07 PM CDT	Flash Flood Warning	ILX	Cass, Morgan, Scott	6 hr
Apr 22, 12:20 PM CDT	Flash Flood Warning	ILX	Menard	2 hr
Apr 22, 12:41 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper, Richland	49 min
Apr 22, 1:23 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Jasper, Lawrence, Richland	37 min
Apr 22, 1:37 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence, Richland	23 min
Apr 22, 2:12 PM CDT	Flash Flood Warning	ILX	Lawrence	4 hr
Apr 22, 2:35 PM CDT	River Flood Warning	ILX	Crawford, Jasper	12 days
Apr 22, 6:29 PM CDT	River Flood Warning	ILX	Fulton, Knox	56 hr

Nearby

Special Weather Statements in Illinois, 2011 Every special weather statement in 2011

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.