Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 17, NWS Lincoln, IL

July 28, 2016DeWitt County, McLean County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 28, 2016, 6:57 AM CDT for DeWitt County, McLean County, 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
Jul 28, 2016, 6:57 AM CDT (11:57 UTC)
Expired
Jul 28, 2016, 10:00 AM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

Counties DeWitt County, IL, McLean County, IL

The radar

The Lincoln radar (KILX), 58 km from the middle of the area, began a volume at 11:59 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
Jul 28, 7:00 AM CDTHEAVY RAIN 1.684 Wsw Le Roy, ILCOCORAHS STATION 4 WSW LE ROY /IL-MCL-26/.

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 00:00Z, 12.0 hours before the alert went out and 23 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 00:00Z on 2016-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 961 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 00:00Z on 2016-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.19395878Sfc1 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
961 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
1110 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted.

084 
WGUS53 KILX 281157
FFWILX
ILC039-113-281500-
/O.NEW.KILX.FF.W.0017.160728T1157Z-160728T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
657 AM CDT THU JUL 28 2016

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN MCLEAN COUNTY IN CENTRAL ILLINOIS...
  NORTHEASTERN DE WITT COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1000 AM CDT

* AT 656 AM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE
  WARNED AREA. UP TO TWO INCHES OF RAIN HAVE ALREADY FALLEN. FLASH
  FLOODING IS ALREADY OCCURRING IN FARMER CITY, WHERE A CITY STREET
  IS FLOODED AND IMPASSABLE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LE ROY...FARMER CITY AND MORAINE VIEW STATE PARK. 

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 145 AND 159.
 
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 4042 8867 4033 8854 4020 8865 4030 8886
      4039 8884

$$

SHIMON

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 11:54 AM CDTSpecial Weather StatementILXChristian2 hr
Jul 28, 12:12 PM CDTSpecial Weather StatementILXCass, Christian, DeWitt, Logan, Macon, Mason and 5 more3 hr
Jul 28, 2:06 PM CDTSpecial Weather StatementILXMcLean, Marshall, Woodford3 hr
Jul 28, 3:03 PM CDTSpecial Weather StatementILXChampaign, Christian, Coles, DeWitt, Douglas, Effingham and 8 more3 hr
Jul 28, 3:37 PM CDTSpecial Weather StatementILXDeWitt, Piatt38 min

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.