Alert archive / Illinois / Areal Flood Warnings in 2017

Areal Flood Warning 9, NWS Lincoln, IL

April 30, 2017Christian County, Illinois

NWS Lincoln, IL issued this areal flood warning at Apr 30, 2017, 2:29 PM CDT for Christian County, Illinois. It was in force for 6 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: Apr 30, 2017, 2:29 PM CDT (19:29 UTC)
Expired: Apr 30, 2017, 8:30 PM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Christian County, IL

The radar

The Lincoln radar (KILX), 67 km from the middle of the area, began a volume at 19:33 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, 7.5 hours before the alert went out and 89 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: 592 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 112 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 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 Apr 30, 12:53 PM CDT, 1 hour 36 minutes earlier.

Area forecast discussion, Apr 30, 12:53 PM CDT, 1 hour 36 minutes before

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Hazardous weather outlook, Apr 30, 1:06 PM CDT, 1 hour 23 minutes before

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In the hours before

Local storm report, Apr 30, 10:14 AM CDT, 4 hours 15 minutes before

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Local storm report, Apr 30, 10:22 AM CDT, 4 hours 7 minutes before

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Local storm report, Apr 30, 10:46 AM CDT, 3 hours 43 minutes before

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Local storm report, Apr 30, 11:20 AM CDT, 3 hours 9 minutes before

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Local storm report, Apr 30, 11:21 AM CDT, 3 hours 8 minutes before

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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Apr 30, 11:29 AM CDT, 3 hours before

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      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 29, 7:03 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Clay, Coles, Crawford, Cumberland, Edgar and 3 more	42 min
Apr 29, 7:10 PM CDT	Flash Flood Warning	ILX	Marshall, Stark	6 hr
Apr 29, 7:44 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Crawford, Edgar, Jasper, Lawrence, Richland	46 min
Apr 29, 7:46 PM CDT	Severe Thunderstorm Warning	ILX	Edgar, Vermilion	14 min
Apr 29, 11:08 PM CDT	Areal Flood Warning	ILX	Morgan, Scott	16 hr
Apr 29, 11:37 PM CDT	Areal Flood Warning	ILX	Christian, Sangamon	9 hr
Apr 29, 11:49 PM CDT	Areal Flood Warning	ILX	Cass, Fulton, Knox, Marshall, Mason, Menard and 4 more	9 hr
Apr 30, 12:48 AM CDT	Areal Flood Warning	ILX	Christian, Clark, Clay, Coles, Crawford, Cumberland and 5 more	9 hr
Apr 30, 6:07 AM CDT	Areal Flood Warning	ILX	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 9 more	6 hr
Apr 30, 8:31 AM CDT	Areal Flood Warning	ILX	Christian, Sangamon	6 hr
Apr 30, 8:42 AM CDT	Areal Flood Warning	ILX	Marshall, Peoria, Tazewell, Woodford	6 hr
Apr 30, 12:02 PM CDT	Areal Flood Warning	ILX	Champaign, Clark, Clay, Coles, Crawford, Cumberland and 9 more	4 days

Nearby

Areal Flood Warnings in Illinois, 2017 Every areal flood warning 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.