Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 19, NWS Lincoln, IL

August 12, 20164 counties in Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 12, 2016, 5:58 PM CDT for 4 counties in 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
Aug 12, 2016, 5:58 PM CDT (22:58 UTC)
Expired
Aug 12, 2016, 9:00 PM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

Counties Logan County, IL, Mason County, IL, Menard County, IL, Tazewell County, IL

The radar

The Lincoln radar (KILX), 13 km from the middle of the area, began a volume at 22:58 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

TimeReportWhereRemark
Aug 12, 8:15 PM CDTHEAVY RAIN 4Minier, ILPUBLIC REPORT OF 4 INCHES OF RAINFALL.

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, 11.0 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2016-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1247 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2016-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

965 
WGUS53 KILX 122258
FFWILX
ILC107-125-129-179-130200-
/O.NEW.KILX.FF.W.0019.160812T2258Z-160813T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN LOGAN COUNTY IN CENTRAL ILLINOIS...
  SOUTHEASTERN MASON COUNTY IN CENTRAL ILLINOIS...
  NORTHEASTERN MENARD COUNTY IN CENTRAL ILLINOIS...
  SOUTHEASTERN TAZEWELL COUNTY IN CENTRAL ILLINOIS...

* UNTIL 900 PM CDT

* AT 556 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATED THAT 3 TO 4
  INCHES OF RAIN HAS FALLEN SINCE 5 PM BETWEEN SAN JOSE AND EMDEN.
  WATER WAS REPORTED OVER PARTS OF INTERSTATE 155 NEAR THE TAZEWELL
  COUNTY LINE. SOME PERIODS OF HEAVY RAIN WILL CONTINUE THROUGH 6
  PM. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MASON CITY...MINIER...GREENVIEW...EMDEN...ARMINGTON...MIDDLETOWN...
  HARTSBURG...NEW HOLLAND AND SWEETWATER.

THIS INCLUDES THE FOLLOWING HIGHWAYS...
 INTERSTATE 155 BETWEEN MILE MARKERS 0 AND 13.
 INTERSTATE 55 BETWEEN MILE MARKERS 126 AND 128.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 4027 8926 3998 8968 4016 8979 4046 8927

$$

GEELHART
1 follow-up statement
469 
WGUS73 KILX 130155
FFSILX

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

ILC107-125-129-179-130202-
/O.EXP.KILX.FF.W.0019.000000T0000Z-160813T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LOGAN-MASON-MENARD-TAZEWELL-
855 PM CDT FRI AUG 12 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN LOGAN...SOUTHEASTERN
MASON...NORTHEASTERN MENARD AND SOUTHEASTERN TAZEWELL COUNTIES WILL
EXPIRE AT 900 PM CDT...

WHILE RAIN CONTINUES TO FALL...THE HEAVY RAIN HAS ENDED. FLOODING IS
NO LONGER EXPECTED TO POSE A THREAT. 

FLOODING CONTINUES A LITTLE FURTHER NORTH THOUGH...AND A FLASH FLOOD
WARNING REMAINS IN EFFECT FOR AREAS NORTH OF A MASON CITY TO MINIER
LINE THROUGH 1030 PM. 

LAT...LON 4027 8926 3998 8968 4016 8979 4046 8927

$$

GEELHART

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 4:34 PM CDTFlash Flood WarningILXLogan, McLean, Mason, Tazewell, Woodford3 hr
Aug 12, 4:47 PM CDTSpecial Weather StatementILXMenard58 min
Aug 12, 5:16 PM CDTAreal Flood AdvisoryILXMarshall, Tazewell, Woodford119 min
Aug 12, 5:38 PM CDTSpecial Weather StatementILXLogan, Sangamon67 min
Aug 12, 6:12 PM CDTAreal Flood AdvisoryILXPeoria, Tazewell2 hr
Aug 12, 6:37 PM CDTAreal Flood AdvisoryILXLogan, Menard, Morgan, Sangamon3 hr
Aug 12, 6:58 PM CDTFlash Flood WarningILXMenard, Sangamon3 hr

Nearby

Flash Flood Warnings in Illinois, 2016Every 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.