Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 69, NWS Lincoln, IL

September 4, 2015Douglas County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 4, 2015, 9:51 PM CDT for Douglas County, Illinois. It was in force for 3 hr. 2 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 4, 2015, 9:51 PM CDT (02:51 UTC)
Expired: Sep 5, 2015, 12:45 AM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Douglas County, IL

The radar

The Lincoln radar (KILX), 106 km from the middle of the area, began a volume at 02:53 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 4, 10:07 PM CDT	FLASH FLOOD	W Tuscola, IL	FLOODING ON US ROUTE 36 IN THE UNDERPASSES WEST OF TOWN
Sep 4, 10:09 PM CDT	HEAVY RAIN 1.8	Tuscola, IL	RAINFALL IN 1 HOUR

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 00:00Z, 2.9 hours before the alert went out and 53 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: 841 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 2156 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: -7 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.

353 
WGUS53 KILX 050251
FFWILX
ILC041-050545-
/O.NEW.KILX.FF.W.0069.150905T0251Z-150905T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
951 PM CDT FRI SEP 4 2015

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 1245 AM CDT
    
* AT 949 PM CDT...LOCAL LAW ENFORCEMENT REPORTED A THUNDERSTORM 
  PRODUCING HEAVY RAIN ACROSS THE WARNED AREA CAUSING VIADUCTS TO 
  FLOOD. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  TUSCOLA...ARCOLA...VILLA GROVE AND CAMARGO. 

THIS INCLUDES INTERSTATE 57 BETWEEN MILE MARKERS 203 AND 216.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3986 8807 3974 8811 3966 8832 3986 8837

$$

BAK

1 follow-up statement

636 
WGUS73 KILX 050439
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1139 PM CDT FRI SEP 4 2015

ILC041-050448-
/O.CAN.KILX.FF.W.0069.000000T0000Z-150905T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DOUGLAS-
1139 PM CDT FRI SEP 4 2015

...THE FLASH FLOOD WARNING FOR CENTRAL DOUGLAS COUNTY IS CANCELLED...

LAW ENFORCEMENT REPORTS THAT FLOOD WATERS HAVE RECEDED...AND ARE NO 
LONGER EXPECTED TO POSE A THREAT TO LIFE OR PROPERTY. PLEASE 
CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 3986 8807 3974 8811 3966 8832 3986 8837

$$

ONTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 7:17 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, McLean, Piatt	28 min
Sep 4, 7:23 PM CDT	Special Weather Statement	ILX	Vermilion	37 min
Sep 4, 8:02 PM CDT	Severe Thunderstorm Warning	ILX	Champaign	28 min
Sep 4, 8:16 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, Piatt	29 min
Sep 4, 8:58 PM CDT	Special Weather Statement	ILX	Champaign, DeWitt, Douglas, Edgar, McLean, Piatt	47 min
Sep 4, 9:49 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas	26 min
Sep 5, 7:45 AM CDT	Areal Flood Advisory	ILX	Vermilion	3 hr
Sep 5, 8:30 AM CDT	Flash Flood Warning	ILX	Vermilion	4 hr

Nearby

Flash Flood Warnings in Illinois, 2015 Every flash flood warning in 2015

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.