Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 24, NWS Lincoln, IL

May 25, 2011Christian County, Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at May 25, 2011, 5:08 PM CDT for Christian County, Sangamon County, Illinois. It was in force for 3 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: May 25, 2011, 5:08 PM CDT (22:08 UTC)
Expired: May 25, 2011, 7:46 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Christian County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 70 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 105 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: 1832 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 561 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

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

206 
WGUS53 KILX 252208
FFWILX
ILC021-167-260400-
/O.NEW.KILX.FF.W.0024.110525T2208Z-110526T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
508 PM CDT WED MAY 25 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN SANGAMON COUNTY IN CENTRAL ILLINOIS...
  WESTERN CHRISTIAN COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1100 PM CDT.

* AT 506 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RAINFALL OF 1.5 TO 3 INCHES WAS ESTIMATED SINCE
  4 PM...IN AREAS FROM AROUND PAWNEE SOUTHWEST INTO THE NORTHWEST
  TIP OF MONTGOMERY COUNTY. ADDITIONAL RAINFALL OF 1 TO 2 INCHES
  IS LIKELY THROUGH 7 PM. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  AUBURN...DIVERNON...EDINBURG...KINCAID...MECHANICSBURG...
  MORRISONVILLE...MOUNT AUBURN...PAWNEE AND ROCHESTER.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 77 AND 88...AND 
INTERSTATE 72 BETWEEN MILE MARKERS 110 AND 116.

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
SOUTH FORK SANGAMON RIVER...CLEAR CREEK...BRUSH CREEK...BEAR CREEK...
PRAIRIE FORK...PANTHER CREEK...SUGAR CREEK...GRIFFITH CREEK...NORTH
FORK CLEAR CREEK...BUCKHART CREEK...SANGAMON RIVER...BLACK BRANCH...
MCCOY BRANCH...HORSE CREEK...HENKLE BRANCH...WEST BRANCH HORSE CREEK
AND MOSQUITO CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3938 8954 3952 8954 3952 8975 3954 8978
      3988 8945 3975 8916 3935 8949

$$
GEELHART

1 follow-up statement

113 
WGUS73 KILX 260046
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
746 PM CDT WED MAY 25 2011

ILC021-167-260101-
/O.CAN.KILX.FF.W.0024.000000T0000Z-110526T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANGAMON IL-CHRISTIAN IL-
746 PM CDT WED MAY 25 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WESTERN CHRISTIAN
AND EASTERN SANGAMON 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 3938 8954 3952 8954 3952 8975 3954 8978
      3988 8945 3975 8916 3935 8949

$$
GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 2:25 AM CDT	Special Weather Statement	ILX	Morgan, Scott	65 min
May 25, 5:47 AM CDT	Severe Thunderstorm Warning	ILX	Logan, Mason, Menard, Sangamon	58 min
May 25, 6:57 AM CDT	Special Weather Statement	ILX	Christian, Macon, Moultrie, Piatt, Shelby	63 min
May 25, 7:57 AM CDT	Tornado Warning	ILX	Piatt	13 min
May 25, 8:16 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, Vermilion	44 min
May 25, 9:29 AM CDT	River Flood Warning	ILX	Fulton, Knox	7 days
May 25, 9:29 AM CDT	River Flood Warning	ILX	Fulton	7 days
May 25, 11:59 AM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Edgar, Vermilion	61 min
May 25, 12:49 PM CDT	Areal Flood Advisory	ILX	Edgar, Vermilion	6 hr
May 25, 12:54 PM CDT	Severe Thunderstorm Warning	ILX	Shelby	66 min
May 25, 1:10 PM CDT	Tornado Warning	ILX	Effingham, Shelby	31 min
May 25, 1:20 PM CDT	Flash Flood Watch	ILX	Cass, Champaign, Christian, Clark, Clay, Coles and 29 more	10 hr
May 25, 1:44 PM CDT	Severe Thunderstorm Warning	ILX	Coles, Douglas, Moultrie	51 min
May 25, 2:23 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	23 min
May 25, 2:44 PM CDT	Severe Thunderstorm Warning	ILX	Edgar, Vermilion	38 min
May 25, 3:20 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	25 min
May 25, 3:47 PM CDT	Tornado Warning	ILX	Cass, Morgan, Scott	43 min
May 25, 4:02 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	58 min
May 25, 4:17 PM CDT	Tornado Warning	ILX	Christian, Sangamon	25 min
May 25, 4:29 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Morgan, Schuyler	61 min
May 25, 4:33 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard, Morgan, Sangamon	57 min
May 25, 4:57 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Logan, Menard, Sangamon	51 min
May 25, 5:00 PM CDT	Severe Thunderstorm Warning	ILX	Douglas, Macon, Moultrie, Piatt, Shelby	60 min
May 25, 5:01 PM CDT	Flash Flood Warning	ILX	Cass, Fulton, Schuyler	3 hr
May 25, 5:07 PM CDT	Severe Thunderstorm Warning	ILX	Edgar	38 min
May 25, 5:13 PM CDT	Tornado Warning	ILX	Christian, Shelby	32 min
May 25, 5:19 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Logan, Mason, Menard, Tazewell	35 min
May 25, 5:37 PM CDT	Severe Thunderstorm Warning	ILX	Macon, Piatt, Shelby	38 min
May 25, 5:42 PM CDT	Severe Thunderstorm Warning	ILX	DeWitt, McLean, Macon, Piatt	37 min
May 25, 5:45 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Knox, McLean, Peoria, Tazewell, Woodford	60 min
May 25, 5:51 PM CDT	Tornado Warning	ILX	DeWitt, McLean	24 min
May 25, 5:58 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas, Piatt	47 min
May 25, 6:01 PM CDT	Areal Flood Advisory	ILX	Christian, Logan, Macon, Sangamon	116 min
May 25, 6:11 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper	49 min
May 25, 6:12 PM CDT	Tornado Warning	ILX	McLean	40 min
May 25, 6:15 PM CDT	Severe Thunderstorm Warning	ILX	Knox, McLean, Marshall, Peoria, Stark, Woodford	40 min
May 25, 6:19 PM CDT	Flash Flood Warning	ILX	Knox	4 hr
May 25, 6:27 PM CDT	Severe Thunderstorm Warning	ILX	Champaign	33 min
May 25, 6:42 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Coles, Douglas, Moultrie, Piatt	33 min
May 25, 6:53 PM CDT	Tornado Warning	ILX	Champaign, Piatt	37 min
May 25, 6:57 PM CDT	Areal Flood Advisory	ILX	Champaign, Coles, DeWitt, Douglas, Moultrie, Piatt	4 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.