Alert archive / Illinois / Flash Flood Warnings in 2013

Flash Flood Warning 3, NWS Lincoln, IL

April 10, 2013DeWitt County, Macon County, Piatt County, Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 10, 2013, 8:05 PM CDT for DeWitt County, Macon County, Piatt County, Illinois. It was in force for 6 hr. 3 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: Apr 10, 2013, 8:05 PM CDT (01:05 UTC)
Expired: Apr 11, 2013, 2:00 AM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties DeWitt County, IL, Macon County, IL, Piatt County, IL

The radar

The Lincoln radar (KILX), 40 km from the middle of the area, began a volume at 01:07 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
Apr 10, 9:00 PM CDT	HEAVY RAIN 1.68	Farmer City, IL	HADS REPORT.
Apr 10, 11:45 PM CDT	HEAVY RAIN 1.47	Lane, IL	24-HOUR TOTAL. APRSWXNET SITE
Apr 10, 11:59 PM CDT	HEAVY RAIN 2.72	Farmer City, IL	HADS STATION

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, 1.1 hours before the alert went out and 34 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: 587 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

070 
WGUS53 KILX 110105
FFWILX
ILC039-115-147-110700-
/O.NEW.KILX.FF.W.0003.130411T0105Z-130411T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
805 PM CDT WED APR 10 2013

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DE WITT COUNTY IN CENTRAL ILLINOIS...
  NORTHERN MACON COUNTY IN CENTRAL ILLINOIS...
  NORTHERN PIATT COUNTY IN CENTRAL ILLINOIS...

* UNTIL 200 AM CDT

* AT 803 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. BETWEEN 1 AND 3 INCHES OF RAIN HAS FALLEN SOUTHEAST OF
  CLINTON AND AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE THROUGH 
  2 AM ACROSS THE WARNED AREA AS MORE WIDESPREAD SHOWERS AND 
  THUNDERSTORMS SPREAD NORTHEAST ACROSS THE AREA LATER THIS EVENING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CLINTON...DECATUR...ARGENTA...DE LAND...FARMER CITY...FORSYTH...
  HARRISTOWN...KENNEY...MANSFIELD...MAROA...NIANTIC...OREANA...
  WAPELLA...WARRENSBURG AND WELDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 4005 8874 3986 8875 3979 8912 3979 8914
      3980 8915 3982 8918 3981 8922 3991 8922
      3992 8914 4020 8915 4029 8849 4028 8847
      4010 8847

$$

KMH

2 follow-up statements

920 
WGUS73 KILX 110257
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
957 PM CDT WED APR 10 2013

ILC039-115-147-110700-
/O.CON.KILX.FF.W.0003.000000T0000Z-130411T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MACON IL-PIATT IL-DE WITT IL-
957 PM CDT WED APR 10 2013

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR DE WITT...NORTHERN PIATT
AND NORTHERN MACON COUNTIES UNTIL 200 AM CDT...

AT 953 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED 
AREA. RADAR ESTIMATED BETWEEN 1.5 AND 3.5 INCHES OF RAIN FELL SINCE 
MID AFTERNOON SOUTHEAST OF CLINTON OVER SOUTHEAST DEWITT AND NORTHWEST
PARTS OF MACON AND PIATT COUNTIES. FARMER CITY IN EASTERN DEWITT COUNTY 
MEASURED 1.7 INCHES. WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS WILL 
BRING ANOTHER 1 TO 1.5 INCHES OF RAIN THROUGH 2 AM AND COULD LEAD TO 
FLASH FLOODING ESPECIALLY IN LOW LYING AND POOR DRAINAGE AREAS.   

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
CLINTON...DECATUR...ARGENTA...DE LAND...FARMER CITY...FORSYTH...
HARRISTOWN...KENNEY...MANSFIELD...MAROA...NIANTIC...OREANA...
WAPELLA...WARRENSBURG AND WELDON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 4005 8874 3986 8875 3979 8912 3979 8914
      3980 8915 3982 8918 3981 8922 3991 8922
      3992 8914 4020 8915 4029 8849 4028 8847
      4010 8847

$$

KMH

840 
WGUS73 KILX 110625
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
125 AM CDT THU APR 11 2013

ILC039-115-147-110640-
/O.CAN.KILX.FF.W.0003.000000T0000Z-130411T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MACON IL-PIATT IL-DE WITT IL-
125 AM CDT THU APR 11 2013

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR DE WITT...NORTHERN
PIATT AND NORTHERN MACON COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4005 8874 3986 8875 3979 8912 3979 8914
      3980 8915 3982 8918 3981 8922 3991 8922
      3992 8914 4020 8915 4029 8849 4028 8847
      4010 8847

$$

AUTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:12 PM CDT	Flash Flood Warning	ILX	Fulton, Schuyler	6 hr
Apr 10, 8:45 PM CDT	Flash Flood Warning	ILX	Cass, Mason, Menard, Morgan, Scott	6 hr
Apr 10, 8:58 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Macon, Moultrie, Shelby	62 min
Apr 10, 10:06 PM CDT	Special Weather Statement	ILX	McLean	54 min
Apr 10, 10:09 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean, Piatt	36 min
Apr 10, 10:23 PM CDT	Flash Flood Warning	ILX	Peoria, Tazewell, Woodford	6 hr
Apr 10, 10:30 PM CDT	Severe Thunderstorm Warning	ILX	Clark, Coles, Cumberland, Edgar	45 min
Apr 10, 10:37 PM CDT	Special Weather Statement	ILX	Champaign, Edgar, Vermilion	53 min
Apr 10, 10:40 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Edgar, Vermilion	35 min
Apr 10, 10:54 PM CDT	Special Weather Statement	ILX	Vermilion	36 min
Apr 10, 11:03 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	42 min
Apr 11, 1:01 AM CDT	Areal Flood Advisory	ILX	Schuyler	15 hr
Apr 11, 9:44 AM CDT	River Flood Warning	ILX	Piatt	4 days
Apr 11, 1:15 PM CDT	River Flood Warning	ILX	Cass, Fulton, Mason	89 days
Apr 11, 1:15 PM CDT	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	93 days

Nearby

Flash Flood Warnings in Illinois, 2013 Every flash flood warning in 2013

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.