Alert archive / Illinois / Areal Flood Warnings in 2011

Areal Flood Warning 22, NWS Lincoln, IL

June 21, 2011Scott County, Illinois

NWS Lincoln, IL issued this areal flood warning at Jun 21, 2011, 9:25 AM CDT for Scott County, Illinois. It was in force for 11 hr. 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 21, 2011, 9:25 AM CDT (14:25 UTC)
Expired: Jun 21, 2011, 8:52 PM CDT
In force: 11 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Scott County, IL

The radar

The St Louis radar (KLSX), 107 km from the middle of the area, began a volume at 14:25 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, 2.4 hours before the alert went out and 170 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: 489 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -245 m²/s²
0-3 km storm-relative helicity: -164 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -5.5

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 areal flood warning went out at Jun 21, 6:28 AM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, Jun 21, 6:28 AM CDT, 2 hours 57 minutes before

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Hazardous weather outlook, Jun 21, 7:10 AM CDT, 2 hours 15 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 21, 9:46 AM CDT	River Flood Warning	ILX	Cass, Mason	48 hr
Jun 21, 4:14 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence, Richland	61 min
Jun 21, 4:29 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Crawford, Jasper, Richland	61 min
Jun 21, 4:37 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Cumberland, Effingham, Jasper, Shelby	53 min
Jun 21, 4:56 PM CDT	Special Weather Statement	ILX	Clark	64 min
Jun 21, 5:28 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Cumberland, Jasper, Lawrence, Richland and 1 more	62 min
Jun 21, 5:29 PM CDT	Severe Thunderstorm Warning	ILX	Peoria	38 min
Jun 21, 5:38 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Douglas, Edgar, Moultrie, Shelby	67 min
Jun 21, 5:51 PM CDT	Flash Flood Warning	ILX	Fulton, Peoria	5 hr
Jun 21, 6:03 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Douglas, Logan, Macon, Moultrie, Piatt and 1 more	47 min
Jun 21, 6:10 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	65 min
Jun 21, 6:15 PM CDT	Severe Thunderstorm Warning	ILX	Tazewell, Woodford	60 min
Jun 21, 6:19 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Logan, McLean, Piatt	56 min
Jun 21, 6:30 PM CDT	Severe Thunderstorm Warning	ILX	Marshall	30 min
Jun 21, 6:38 PM CDT	Areal Flood Advisory	ILX	Tazewell, Woodford	5 hr
Jun 21, 6:59 PM CDT	Severe Thunderstorm Warning	ILX	Woodford	40 min

Nearby

Areal Flood Warnings in Illinois, 2011 Every areal flood warning 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.