Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 28, NWS Lincoln, IL

August 28, 2014Logan County, Menard County, Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 28, 2014, 8:25 PM CDT for Logan County, Menard County, Sangamon County, Illinois. It was in force for 3 hr. 14 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: Aug 28, 2014, 8:25 PM CDT (01:25 UTC)
Expired: Aug 28, 2014, 11:30 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Logan County, IL, Menard County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 21 km from the middle of the area, began a volume at 01:29 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
Aug 28, 8:30 PM CDT	HEAVY RAIN 1.8	1 Ssw Capital Airport, IL	1 HOUR TOTAL OF 1.80 INCHES.
Aug 28, 9:00 PM CDT	FLASH FLOOD	5 Nne Springfield, IL	VIADUCT FLOODING ON NORTH DIRKSEN PARKWAY EAST OF PEORIA ROAD.
Aug 28, 9:00 PM CDT	HEAVY RAIN 2.07	2 W Riverton, IL	2.07 INCHES IN THE PAST 56 MIN.
Aug 28, 9:00 PM CDT	HEAVY RAIN 2.46	1 Se Springfield, IL	WAND REPORTS 2.46 INCHES OF RAINFALL.
Aug 28, 9:05 PM CDT	FLASH FLOOD	2 Sw Springfield, IL	MACARTHUR AT OUTER PARK DRIVE FLOODED.
Aug 28, 9:10 PM CDT	HEAVY RAIN 4	3 Sw Springfield, IL	MONTVALE SUBDIVISION
Aug 28, 9:30 PM CDT	FLASH FLOOD	Springfield, IL	WATER UP TO CAR HEADLIGHTS AT THE INTERSECTION OF COOK AND SOUTH 8TH STREETS. TWITTER REPORT FROM STATE JOURNAL REGISTER PHOTOGRAPHER
Aug 28, 9:30 PM CDT	HEAVY RAIN 3.06	1 Se Springfield, IL	AT BALL CHARTER SCHOOL ON SOUTHEAST SIDE OF SPRINGFIELD.
Aug 28, 10:00 PM CDT	FLASH FLOOD	N Springfield, IL	WATER KNEE DEEP ON MULTIPLE ROADS ON THE NORTH AND NORTHEAST SIDE OF SPRINGFIELD IN NORTHGATE SUBDIVISION. SOME STALLED VEHICLES. A LARGE BRANCH FELL ON TRUCK IN NORTHGATE SUBDIVISION.
Aug 28, 10:13 PM CDT	FLASH FLOOD	Springfield, IL	FLOODING AT I-72/VETERANS PKWY AND STANDING WATER ON I-55 AT EXIT 94. REPORTED BY IDOT
Aug 28, 10:21 PM CDT	FLASH FLOOD	Springfield, IL	SOUTH 15TH STREET SOUTH OF ASH STREET COMPLETELY IMPASSIBLE. UP TO 3 FEET OF WATER. REPORTED BY SPRINGFIELD POLICE DEPARTMENT
Aug 28, 10:23 PM CDT	FLASH FLOOD	Springfield, IL	FLOODING IN WESTCHESTER SUBDIVISION. INTERSECTION OF CHATHAM AND WABASH CLOSED DUE TO FLOODING. PUBLIC REPORT VIA WICS FACEBOOK PAGE
Aug 28, 10:30 PM CDT	HEAVY RAIN 5.1	2 Sse Springfield, IL	WICS WEATHER OBSERVER REPORTED 5-1/8 INCH AT 11TH STREET AND STEVENSON DRIVE
Aug 28, 10:40 PM CDT	HEAVY RAIN 3.06	Elkhart, IL	PUBLIC REPORT VIA WICS FACEBOOK PAGE

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.4 hours before the alert went out and 196 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: 172 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 744 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 152 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

271 
WGUS53 KILX 290125
FFWILX
ILC107-129-167-290430-
/O.NEW.KILX.FF.W.0028.140829T0125Z-140829T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
825 PM CDT THU AUG 28 2014

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL SANGAMON COUNTY IN CENTRAL ILLINOIS...
  SOUTHEASTERN MENARD COUNTY IN CENTRAL ILLINOIS...
  WESTERN LOGAN COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1130 PM CDT

* AT 823 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RADAR ESTIMATES UP TO 2 INCHES OF RAIN HAS FALLEN
  IN THE PAST HOUR. ALSO...A FEW GROUND TRUTH SPOTTER REPORTS OF 1
  INCH IN THE PAST 30 MINUTES HAVE BEEN RECEIVED.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LINCOLN...SPRINGFIELD...ATHENS...ELKHART...RIVERTON...SHERMAN
  AND WILLIAMSVILLE.

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 4022 8932 4004 8936 3982 8952 3971 8966
      3990 8990 4006 8947 4019 8955

$$

BAK

1 follow-up statement

529 
WGUS73 KILX 290426
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1126 PM CDT THU AUG 28 2014

ILC107-129-167-290439-
/O.EXP.KILX.FF.W.0028.000000T0000Z-140829T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOGAN IL-MENARD IL-SANGAMON IL-
1126 PM CDT THU AUG 28 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTH CENTRAL
SANGAMON...SOUTHEASTERN MENARD AND WESTERN LOGAN COUNTIES WILL BE
ALLOWED TO EXPIRE AT 1130 PM CDT...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED 
AREA...ENDING THE FLASH FLOOD THREAT. HOWEVER...FLOODING IS STILL 
OCCURRING IN AND AROUND SPRINGFIELD AND IN SOME LOW LYING RURAL 
AREAS. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR 
LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 4022 8932 4004 8936 3982 8952 3971 8966
      3990 8990 4006 8947 4019 8955

$$

BAK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 8:05 PM CDT	Flash Flood Warning	ILX	Logan, Mason, Menard	3 hr
Aug 28, 8:10 PM CDT	Areal Flood Advisory	ILX	Sangamon	3 hr
Aug 28, 9:01 PM CDT	Flash Flood Warning	ILX	Logan, Sangamon	3 hr
Aug 28, 9:34 PM CDT	Flash Flood Warning	ILX	Christian, Sangamon	3 hr
Aug 28, 9:51 PM CDT	Flash Flood Warning	ILX	Macon	3 hr
Aug 28, 11:23 PM CDT	Areal Flood Warning	ILX	Sangamon	6 hr

Nearby

Flash Flood Warnings in Illinois, 2014 Every flash flood warning in 2014

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.