Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 39, NWS Lincoln, IL

June 15, 2004Macon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jun 15, 2004, 9:30 AM CDT for Macon 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: Jun 15, 2004, 9:30 AM CDT (14:30 UTC)
Expired: Jun 15, 2004, 3:30 PM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Macon County, IL

The radar

The Lincoln radar (KILX), 45 km from the middle of the area, began a volume at 14:31 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 12:00Z, 2.5 hours before the alert went out and 39 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: 149 J/kg
Mixed-layer CIN: -151 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 151430
FFWILX
ILC115-152030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
930 AM CDT TUE JUN 15 2004

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MACON COUNTY IN CENTRAL ILLINOIS

* UNTIL 330 PM CDT

* AT 930 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAINS CONTINUING ACROSS MACON COUNTY. UP TO 1.5 INCHES OF 
  RAIN HAS BEEN ESTIMATED BY DOPPLER RADAR SINCE 8 AM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS MACON 
  COUNTY THROUGH 11 AM. TOTAL RAINFALL AMOUNTS WILL LIKELY RANGE 
  FROM 2 TO 3 INCHES ACROSS PORTIONS OF MACON COUNTY BY 11 AM. THESE 
  RAINFALL AMOUNTS WILL LIKELY PRODUCE FLASH FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF IN A FLOOD PRONE AREA...MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG CREEKS AND STREAMS ARE ESPECIALLY VULNERABLE
TO THE EFFECTS OF FLASH FLOODING. DO NOT ATTEMPT TO CROSS FLOODED
AREAS BY FOOT OR AUTOMOBILE.

REPORT FLASH FLOODING TO YOUR LOCAL ESDA...OR THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. STAY
TUNED FOR LATER STATEMENTS.

LAT...LON 4005 8876 3967 8883 3967 8914 4005 8914

$$

PLAHMER

NNNN

2 follow-up statements

000 
WGUS73 KILX 151731
FFSILX
ILC115-152030-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1227 PM CDT TUE JUN 15 2004

...A FLASH FLOOD WARNING CONTINUES FOR MACON COUNTY UNTIL 330 PM
CDT...

AT 1227 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THE HEAVY RAINS FROM THIS MORNING HAD SHIFTED EAST OF MACON COUNTY. 
HOWEVER...ADDITIONAL STORM DEVELOPMENT SOUTH OF THE SPRINGFIELD AREA 
WILL SHIFT NORTHEAST TOWARD MACON COUNTY EARLY THIS AFTERNOON. ANY 
HEAVY RAINFALL OVER ALREADY SATURATED GROUNDS WILL LIKELY CAUSE 
ADDITIONAL FLASH FLOODING. LATE THIS MORNING...MACON COUNTY ESDA 
REPORTED THAT HEAVY RAINFALL CAUSED UNDERPASS FLOODING ONE TO ONE 
AND A HALF FEET DEEP AT 22ND STREET AND GARFIELD IN DECATUR.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING. 
IF IN A FLOOD PRONE AREA...MOVE TO HIGHER GROUND IMMEDIATELY. 
RESIDENTS LIVING ALONG CREEKS AND STREAMS ARE ESPECIALLY VULNERABLE 
TO THE EFFECTS OF FLASH FLOODING. DO NOT ATTEMPT TO CROSS FLOODED 
AREAS BY FOOT OR AUTOMOBILE.

REPORT FLASH FLOODING TO YOUR LOCAL ESDA...OR THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. STAY
TUNED FOR LATER STATEMENTS.

LAT...LON 4004 8881 3968 8884 3969 8912 4004 8912

$$

PLAHMER

000 
WGUS73 KILX 151904
FFSILX
ILC021-107-115-147-151915-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
203 PM CDT TUE JUN 15 2004

...THE FLASH FLOOD WARNINGS FOR LOGAN...PIATT...MACON AND CHRISTIAN 
COUNTIES HAVE BEEN CANCELLED...

THE HEAVY RAINFALL AND FLOOD THREAT HAS ENDED ACROSS THE WARNED AREA.
THEREFORE...THE FLASH FLOOD WARNINGS HAVE BEEN CANCELLED.

LAT...LON 4018 8847 3980 8848 3982 8875 3968 8907
      3940 8907 3940 8946 3993 8919 3995 8943
      4028 8956 4028 8927 4005 8914 4005 8875

$$

PLAHMER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 9:22 AM CDT	Flash Flood Warning	ILX	Logan	6 hr
Jun 15, 9:48 AM CDT	Flash Flood Warning	ILX	Christian	6 hr
Jun 15, 10:01 AM CDT	Flash Flood Warning	ILX	Piatt	6 hr

Nearby

Flash Flood Warnings in Illinois, 2004 Every flash flood warning in 2004

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.