Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 31, NWS Lincoln, IL

September 9, 2016Champaign County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 9, 2016, 5:59 PM CDT for Champaign County, Illinois. It was in force for 3 hr. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Sep 9, 2016, 5:59 PM CDT (22:59 UTC)
Expired: Sep 9, 2016, 9:00 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Champaign County, IL

The radar

The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 23:01 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.

What was reported inside it

Time	Report	Where	Remark
Sep 9, 6:01 PM CDT	HEAVY RAIN 1.39	2 Sse Urbana, IL	MESONET STATION 2 SE URBANA /D6125/. THE DURATION OF THE HEAVY RAIN EVENT WAS 24 HOURS.
Sep 9, 6:11 PM CDT	HEAVY RAIN 1.57	2 Sse Urbana, IL	MESONET STATION 2 SE URBANA /D6125/. THE DURATION OF THE HEAVY RAIN EVENT WAS 6 HOURS.
Sep 9, 6:48 PM CDT	HEAVY RAIN 2.37	4 Ese Urbana, IL	. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR 18 MINUTES.
Sep 9, 6:53 PM CDT	HEAVY RAIN 2.07	2 Sw Savoy, IL	ASOS STATION UNIV OF IL-WILLARD AP /CMI/.
Sep 9, 6:53 PM CDT	HEAVY RAIN 2.07	2 Sw Savoy, IL	ASOS STATION UNIV OF IL-WILLARD AP /CMI/. THE DURATION OF THE HEAVY RAIN EVENT WAS 6 HOURS.
Sep 9, 7:33 PM CDT	HEAVY RAIN 1.65	2 Sse Urbana, IL	.
Sep 9, 7:33 PM CDT	HEAVY RAIN 1.65	2 Sse Urbana, IL	. THE DURATION OF THE HEAVY RAIN EVENT WAS 1 HOUR 15 MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 44 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: 61 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 781 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: -115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

920 
WGUS53 KILX 092259
FFWILX
ILC019-100200-
/O.NEW.KILX.FF.W.0031.160909T2259Z-160910T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
559 PM CDT FRI SEP 9 2016

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CHAMPAIGN COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 900 PM CDT

* AT 558 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHAMPAIGN...URBANA...SAVOY...ST. JOSEPH...TOLONO...OGDEN...
  SADORUS...ROYAL...IVESDALE AND WILLARD AIRPORT.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 57 BETWEEN MILE MARKERS 225 AND 232.
 INTERSTATE 74 BETWEEN MILE MARKERS 184 AND 196.

LAT...LON 4022 8794 4013 8794 3989 8846 4000 8846
      4029 8793 4023 8793

$$

BAK

1 follow-up statement

730 
WGUS73 KILX 100203
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
903 PM CDT FRI SEP 9 2016

ILC019-100213-
/O.EXP.KILX.FF.W.0031.000000T0000Z-160910T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CHAMPAIGN-
903 PM CDT FRI SEP 9 2016

...THE FLASH FLOOD WARNING FOR CENTRAL CHAMPAIGN COUNTY HAS
EXPIRED...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4022 8794 4013 8794 3989 8846 4000 8846
      4029 8793 4023 8793

$$

AUTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 2:15 AM CDT	Dense Fog Advisory	ILX	Cass, Champaign, Christian, Clark, Coles, Cumberland and 21 more	7 hr
Sep 9, 6:09 PM CDT	Tornado Warning	ILX	Champaign	36 min
Sep 9, 6:23 PM CDT	Tornado Warning	ILX	Clark, Cumberland	52 min
Sep 9, 6:25 PM CDT	Tornado Warning	ILX	Vermilion	35 min
Sep 9, 6:37 PM CDT	Flash Flood Warning	ILX	Vermilion	3 hr
Sep 9, 6:44 PM CDT	Tornado Warning Tornado observed	ILX	Champaign, Vermilion	31 min

Nearby

Flash Flood Warnings in Illinois, 2016 Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.