Alert archive / Illinois / Areal Flood Warnings in 2017

Areal Flood Warning 16, NWS Lincoln, IL

May 11, 2017Richland County, Illinois

NWS Lincoln, IL issued this areal flood warning at May 11, 2017, 2:16 PM CDT for Richland 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: May 11, 2017, 2:16 PM CDT (19:16 UTC)
Expired: May 11, 2017, 8:15 PM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Richland County, IL

The radar

The Evansville,IN radar (KVWX), 59 km from the middle of the area, began a volume at 19:17 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

Nashville Metro, TN (KBNA), launched 12:00Z, 7.3 hours before the alert went out and 316 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: 2 J/kg
Mixed-layer CIN: -347 J/kg
Mixed-layer LCL: 1335 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 134 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 May 11, 12:12 PM CDT, 2 hours 4 minutes earlier.

Area forecast discussion, May 11, 12:12 PM CDT, 2 hours 4 minutes before

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Hazardous weather outlook, May 11, 10:53 AM CDT, 3 hours 23 minutes before

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In the hours before

Local storm report, May 11, 11:19 AM CDT, 2 hours 57 minutes before

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Local storm report, May 11, 11:22 AM CDT, 2 hours 54 minutes before

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Local storm report, May 11, 11:23 AM CDT, 2 hours 53 minutes before

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Local storm report, May 11, 11:37 AM CDT, 2 hours 39 minutes before

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Local storm report, May 11, 12:22 PM CDT, 1 hour 54 minutes before

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      <p id="message2">
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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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Local storm report, May 11, 12:33 PM CDT, 1 hour 43 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </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
May 10, 7:36 PM CDT	Special Weather Statement	ILX	Christian, DeWitt, McLean, Macon, Piatt	39 min
May 10, 7:43 PM CDT	Tornado Warning	ILX	Macon, Piatt	32 min
May 10, 8:31 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	17 min
May 10, 10:22 PM CDT	Special Weather Statement	ILX	Jasper	38 min
May 10, 10:55 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence, Richland	65 min
May 10, 11:22 PM CDT	Flash Flood Warning	ILX	Clay, Crawford, Effingham, Jasper, Lawrence, Richland	3 hr
May 11, 12:34 AM CDT	Flash Flood Warning	ILX	Clay, Lawrence, Richland	3 hr
May 11, 2:18 AM CDT	Areal Flood Warning	ILX	Clay, Crawford, Effingham, Jasper, Lawrence, Richland	12 hr
May 11, 3:58 AM CDT	River Flood Warning	ILX	Crawford, Jasper	17 hr

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.