Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 68, NWS Lincoln, IL

July 29, 2011Clark County, Crawford County, Jasper County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 29, 2011, 9:17 PM CDT for Clark County, Crawford County, Jasper 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 outline as issued.

The facts

Issued: Jul 29, 2011, 9:17 PM CDT (02:17 UTC)
Expired: Jul 30, 2011, 3:01 AM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Clark County, IL, Crawford County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 100 km from the middle of the area, began a volume at 02:17 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

Lincoln, IL (KILX), launched 00:00Z, 2.3 hours before the alert went out and 133 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: 1826 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 816 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

927 
WGUS53 KILX 300217
FFWILX
ILC023-033-079-300830-
/O.NEW.KILX.FF.W.0068.110730T0217Z-110730T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
917 PM CDT FRI JUL 29 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN JASPER COUNTY IN SOUTHEAST ILLINOIS...
  NORTHERN CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  SOUTHERN CLARK COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL 330 AM CDT SATURDAY

* AT 916 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RAINFALL ESTIMATES RANGE FROM 2 TO 3 INCHES ACROSS
  THE WARNED AREA SINCE 730 PM CDT. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ANNAPOLIS...CASEY...EATON...HUTSONVILLE AND WEST UNION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES WILL BE POSSIBLE IN
THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

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 3916 8762 3914 8765 3912 8763 3905 8763
      3903 8801 3932 8800 3932 8761

$$

SMITH

2 follow-up statements

698 
WGUS73 KILX 300426
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1126 PM CDT FRI JUL 29 2011

ILC023-033-079-300830-
/O.CON.KILX.FF.W.0068.000000T0000Z-110730T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CLARK IL-CRAWFORD IL-
1126 PM CDT FRI JUL 29 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN CRAWFORD...
SOUTHERN CLARK AND NORTHEASTERN JASPER COUNTIES UNTIL 330 AM CDT...

AT 1123 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED
THAT BETWEEN 2 AND 4 INCHES OF RAIN HAS OCCURRED THIS EVENING IN 
THE WARNED AREA. DOPPLER RAINFALL ESTIMATES INDICATES THAT A SMALL
AREA FROM BELLAIR THROUGH ANNAPOLIS TO WEST UNION 5 TO LOCALLY 
6 INCHES OF RAIN. 

ALTHOUGH THE EXCESSIVE RAIN HAS ENDED...THE FLASH FLOOD THREAT HAS NOT.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR.
SOME LOCATIONS THAT WILL CONTINUE TO BE THREATENED WITH FLOODING INCLUDE
ANNAPOLIS...CASEY...EATON...HUTSONVILLE AND WEST UNION.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS
AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING
AREAS ARE ALSO SUBJECT TO FLOODING.

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 3916 8762 3914 8765 3912 8763 3905 8763
      3903 8801 3932 8800 3932 8761

$$

SMITH

611 
WGUS73 KILX 300801
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
301 AM CDT SAT JUL 30 2011

ILC023-033-079-300816-
/O.CAN.KILX.FF.W.0068.000000T0000Z-110730T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CLARK IL-CRAWFORD IL-
301 AM CDT SAT JUL 30 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN
CRAWFORD...SOUTHERN CLARK AND NORTHEASTERN JASPER 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 3916 8762 3914 8765 3912 8763 3905 8763
      3903 8801 3932 8800 3932 8761

$$

SHIMON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 7:08 PM CDT	Special Weather Statement	ILX	Cumberland	67 min
Jul 29, 7:13 PM CDT	Severe Thunderstorm Warning	ILX	Cumberland, Effingham, Shelby	62 min
Jul 29, 7:32 PM CDT	Flash Flood Warning	ILX	Coles, Cumberland	6 hr
Jul 29, 8:08 PM CDT	Special Weather Statement	ILX	Crawford, Jasper	52 min
Jul 29, 8:34 PM CDT	Severe Thunderstorm Warning	ILX	Jasper	26 min
Jul 29, 9:01 PM CDT	Special Weather Statement	ILX	Crawford, Lawrence	59 min
Jul 29, 9:06 PM CDT	Areal Flood Advisory	ILX	Clark, Crawford, Cumberland, Effingham, Jasper	6 hr
Jul 29, 9:09 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Jasper, Lawrence, Richland	52 min
Jul 30, 1:25 AM CDT	Areal Flood Warning	ILX	Cumberland	6 hr

Nearby

Flash Flood Warnings in Illinois, 2011 Every flash flood warning in 2011

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.