Alert archive / Illinois / Flash Flood Warnings in 2008

Flash Flood Warning 39, NWS Lincoln, IL

July 7, 2008Coles County, Douglas County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 7, 2008, 4:37 AM CDT for Coles County, Douglas County, Illinois. It was in force for 3 hr. 1 report 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: Jul 7, 2008, 4:37 AM CDT (09:37 UTC)
Expired: Jul 7, 2008, 7:30 AM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Coles County, IL, Douglas County, IL

The radar

The Lincoln radar (KILX), 122 km from the middle of the area, began a volume at 09:40 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
Jul 7, 7:00 AM CDT	HEAVY RAIN 2.63	Tuscola, IL

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, 9.6 hours before the alert went out and 73 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: 1301 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1388 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 070939
FFWILX
ILC029-041-071230-
/O.NEW.KILX.FF.W.0039.080707T0937Z-080707T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
437 AM CDT MON JUL 7 2008

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 730 AM CDT.

* AT 429 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. DOPPLER
  RADAR HAS ESTIMATED 2 TO 3 INCHES OF RAIN SINCE 2 AM.

THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS THESE
AREAS. RAINFALL AMOUNTS WILL LIKELY RANGE FROM 4 TO 5 INCHES BY 7 AM. 
THESE RAINFALL AMOUNTS WILL LIKELY PRODUCE FLASH FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CHARLESTON...
MATTOON...TUSCOLA...ARCOLA...ASHMORE...CAMARGO...HINDSBORO...
HUMBOLDT...NEWMAN...OAKLAND...RARDIN AND VILLA GROVE.

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

REPORT FLASH FLOODING TO YOUR LOCAL EMERGENCY MANAGER...OR THE
NEAREST LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER
SERVICE.

LAT...LON 3950 8797 3949 8804 3943 8804 3944 8838
      3986 8840 3987 8795 3979 8796 3979 8797

$$

HJS

1 follow-up statement

000 
WGUS73 KILX 071228
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
726 AM CDT MON JUL 7 2008

ILC029-041-071236-
/O.EXP.KILX.FF.W.0039.000000T0000Z-080707T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLES-DOUGLAS-
726 AM CDT MON JUL 7 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 AM CDT FOR DOUGLAS AND
COLES COUNTIES...

CALLS TO LOCAL LAW ENFORCEMENT INDICATE THAT ANY FLOODING AS 
SUBSIDED. THEREFORE THE FLASH FLOOD WARNING WILL EXPIRE AT 730 AM 
FOR DOUGLAS AND COLES COUNTIES. 

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE.

LAT...LON 3950 8797 3949 8804 3943 8804 3944 8838
      3986 8840 3987 8795 3979 8796 3979 8797

$$

SHIMON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 3:15 AM CDT	Flash Flood Warning	ILX	McLean	4 hr
Jul 7, 3:32 AM CDT	Areal Flood Advisory	ILX	Fulton, Peoria, Tazewell	3 hr
Jul 7, 3:55 AM CDT	Flash Flood Warning	ILX	Champaign, DeWitt, McLean, Piatt	3 hr
Jul 7, 5:50 AM CDT	Flash Flood Warning	ILX	Moultrie	3 hr

Nearby

Flash Flood Warnings in Illinois, 2008 Every flash flood warning in 2008

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.