Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 20, NWS Lincoln, IL

August 12, 2016Menard County, Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 12, 2016, 6:58 PM CDT for Menard County, Sangamon County, Illinois. It was in force for 3 hr. 12 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 12, 2016, 6:58 PM CDT (23:58 UTC)
Expired: Aug 12, 2016, 10:00 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Menard County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 34 km from the middle of the area, began a volume at 00:04 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 12, 7:00 PM CDT	FLOOD	5 W Springfield, IL	FLOODING OF STREETS.
Aug 12, 7:00 PM CDT	HEAVY RAIN 4.03	5 W Springfield, IL	4.03 INCHES OF RAIN IN 90 MINUTES.
Aug 12, 7:14 PM CDT	HEAVY RAIN 3.5	4 W Springfield, IL	RELAYED VIA WAND-TV.
Aug 12, 7:40 PM CDT	HEAVY RAIN 2.34	2 W Riverton, IL	2.34 INCHES OF HEAVY RAIN IN 90 MINUTES.
Aug 12, 7:52 PM CDT	HEAVY RAIN 5.17	Capital Airport, IL	2 HOUR RAINFALL TOTAL.
Aug 12, 8:45 PM CDT	HEAVY RAIN 3.51	Springfield, IL	RAINFALL TOTAL SINCE 610 PM.
Aug 12, 9:00 PM CDT	HEAVY RAIN 5.19	Fancy Prairie, IL
Aug 12, 9:13 PM CDT	HEAVY RAIN 5.07	3 Nne Curran, IL	STORM TOTAL.
Aug 12, 9:13 PM CDT	HEAVY RAIN 5.07	5 W Springfield, IL	STORM TOTAL.
Aug 12, 9:15 PM CDT	HEAVY RAIN 3.81	Springfield, IL	3 HOUR STORM TOTAL.
Aug 12, 9:52 PM CDT	HEAVY RAIN 5.56	4 Nnw Springfield, IL
Aug 12, 9:52 PM CDT	HEAVY RAIN 5.56	Capital Airport, IL	5.56 INCHES IN THE PAST 4 HOURS.

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 12:00Z, 12.0 hours before the alert went out and 89 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: 1247 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

942 
WGUS53 KILX 122358
FFWILX
ILC129-167-130300-
/O.NEW.KILX.FF.W.0020.160812T2358Z-160813T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
658 PM CDT FRI AUG 12 2016

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN SANGAMON COUNTY IN CENTRAL ILLINOIS...
  SOUTHEASTERN MENARD COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1000 PM CDT

* AT 656 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. A TOTAL OF 3.44 INCHES OF RAIN
  WAS REPORTED AT ABRAHAM LINCOLN CAPITAL AIRPORT IN JUST ONE HOUR.
  FLOODING WAS REPORTED IN SEVERAL LOCATIONS IN SPRINGFIELD...
  ESPECIALLY ON THE WEST SIDE OF THE CITY. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SPRINGFIELD...CHATHAM...SHERMAN...ROCHESTER...RIVERTON...ATHENS...
  WILLIAMSVILLE...NEW BERLIN...JEROME...SOUTHERN VIEW...
  LELAND GROVE...GRANDVIEW...SPAULDING...DAWSON...CLEAR LAKE...
  CURRAN...BERLIN...CANTRALL...FARMINGDALE AND CAPITAL AIRPORT.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 55 BETWEEN MILE MARKERS 88 AND 110.
 INTERSTATE 72 BETWEEN MILE MARKERS 83 AND 110.

PEOPLE ATTENDING THE ILLINOIS STATE FAIR ARE IN THE WARNED AREA AND
SHOULD TAKE SHELTER AT THE FAIRGROUNDS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4002 8972 3998 8958 3997 8957 3998 8954
      3996 8948 3994 8948 3993 8941 3967 8961
      3972 8994

$$

GEELHART

1 follow-up statement

998 
WGUS73 KILX 130043
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
743 PM CDT FRI AUG 12 2016

ILC129-167-130300-
/O.CON.KILX.FF.W.0020.000000T0000Z-160813T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANGAMON-MENARD-
743 PM CDT FRI AUG 12 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NORTHWESTERN SANGAMON AND SOUTHEASTERN MENARD COUNTIES...

AT 740 PM CDT...DOPPLER RADAR INDICATED THAT THE HEAVIEST RAIN HAS
MOVED INTO SOUTHEAST SANGAMON COUNTY. FLOODING CONTINUES OVER MANY
PARTS OF THE SPRINGFIELD AREA THOUGH...DUE TO AMONTS OF 2 TO 5
INCHES WHICH HAS FALLEN SINCE 6 PM. ABRAHAM LINCOLN CAPITAL AIRPORT
HAS REPORTED 4.66 INCHES OF RAIN BETWEEN 6 PM AND 730 PM. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SPRINGFIELD...CHATHAM...SHERMAN...ROCHESTER...RIVERTON...ATHENS...
WILLIAMSVILLE...NEW BERLIN...JEROME...SOUTHERN VIEW...LELAND GROVE...
GRANDVIEW...SPAULDING...DAWSON...CLEAR LAKE...CURRAN...BERLIN...
CANTRALL...FARMINGDALE AND CAPITAL AIRPORT.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 55 BETWEEN MILE MARKERS 88 AND 110.
 INTERSTATE 72 BETWEEN MILE MARKERS 83 AND 110.

PEOPLE ATTENDING THE ILLINOIS STATE FAIR ARE AFFECTED BY THIS
WARNING...AND SHOULD REMAIN IN SHELTER AT THE FAIRGROUNDS DUE TO
THE FLOODING. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 4002 8972 3998 8958 3997 8957 3998 8954
      3996 8948 3994 8948 3993 8941 3967 8961
      3972 8994

$$

GEELHART

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 4:34 PM CDT	Flash Flood Warning	ILX	Logan, McLean, Mason, Tazewell, Woodford	3 hr
Aug 12, 4:47 PM CDT	Special Weather Statement	ILX	Menard	58 min
Aug 12, 5:16 PM CDT	Areal Flood Advisory	ILX	Marshall, Tazewell, Woodford	119 min
Aug 12, 5:38 PM CDT	Special Weather Statement	ILX	Logan, Sangamon	67 min
Aug 12, 5:58 PM CDT	Flash Flood Warning	ILX	Logan, Mason, Menard, Tazewell	3 hr
Aug 12, 6:12 PM CDT	Areal Flood Advisory	ILX	Peoria, Tazewell	2 hr
Aug 12, 6:37 PM CDT	Areal Flood Advisory	ILX	Logan, Menard, Morgan, Sangamon	3 hr

Nearby

Flash Flood Warnings in Illinois, 2016 Every flash flood warning in 2016

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.