Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 12, NWS Lincoln, IL

July 20, 2016Cass County, Mason County, Schuyler County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 20, 2016, 11:19 AM CDT for Cass County, Mason County, Schuyler 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
Jul 20, 2016, 11:19 AM CDT (16:19 UTC)
Expired
Jul 20, 2016, 2:15 PM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

Counties Cass County, IL, Mason County, IL, Schuyler County, IL

The radar

The Lincoln radar (KILX), 75 km from the middle of the area, began a volume at 16:20 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, 4.3 hours before the alert went out and 137 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 2016-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2016-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 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
3 J/kg
Mixed-layer CIN
-277 J/kg
Mixed-layer LCL
1429 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
109 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

209 
WGUS53 KILX 201619
FFWILX
ILC017-125-169-201915-
/O.NEW.KILX.FF.W.0012.160720T1619Z-160720T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1119 AM CDT WED JUL 20 2016

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHWESTERN MASON COUNTY IN CENTRAL ILLINOIS...
  EXTREME EAST CENTRAL SCHUYLER COUNTY IN WEST CENTRAL ILLINOIS...
  CENTRAL CASS COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 215 PM CDT

* AT 1117 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR HAS ESTIMATED THAT 3.00 
  TO 4.00 INCHES OF RAIN HAS FALLEN SINCE 800 AM. ADDITIONAL HEAVY
  IS EXPECTED THROUGH 100 PM. FLASH FLOODING IS EXPECTED TO BEGIN 
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  VIRGINIA...CHANDLERVILLE...BROWNING...PHILADELPHIA...AND RURAL
  PARTS OF EXTREME SOUTHWEST MASON COUNTY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3998 9000 3987 9004 3996 9025 4005 9039
      4017 9045 4016 9031

$$

MILLER
2 follow-up statements
352 
WGUS73 KILX 201756
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1256 PM CDT WED JUL 20 2016

ILC017-125-169-201915-
/O.CON.KILX.FF.W.0012.000000T0000Z-160720T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON-SCHUYLER-CASS-
1256 PM CDT WED JUL 20 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 PM CDT FOR
EXTREME SOUTHWESTERN MASON...EXTREME EAST CENTRAL SCHUYLER AND CENTRAL CASS
COUNTIES...

AT 1252 PM CDT...DOPPLER RADAR INDICATED HEAVY RAIN ACROSS THE WARNED
AREA. RADAR ESTIMATED THAT 3 TO 4 INCHES OF RAIN HAVE FALLEN SINCE
10 AM...WITH 6 TO 8 INCHES OF RAIN THE PAST 24 HOURS...FROM BROWNING TO 
JUST SOUTHWEST OF CHANDLERVILLE. ADDITIONAL RAIN SHOWERS ARE EXPECTED
EARLY THIS AFTERNOON...BUT THE HEAVIEST RAIN HAS ENDED. BE ALERT FOR
FLOODED ROADWAYS...PARTICULARLY IN RURAL AREAS OF NORTHERN CASS COUNTY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
VIRGINIA...CHANDLERVILLE...BROWNING AND PHILADELPHIA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3998 9000 3987 9004 3996 9025 4005 9039
      4017 9045 4016 9031

$$

MILLER
363 
WGUS73 KILX 201913
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
213 PM CDT WED JUL 20 2016

ILC017-125-169-201923-
/O.EXP.KILX.FF.W.0012.000000T0000Z-160720T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MASON-SCHUYLER-CASS-
213 PM CDT WED JUL 20 2016

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN MASON...EAST CENTRAL
SCHUYLER AND EASTERN CASS COUNTIES WILL EXPIRE AT 215 PM CDT...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3998 9000 3987 9004 3996 9025 4005 9039
      4017 9045 4016 9031

$$

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 8:42 PM CDTSpecial Weather StatementILXChristian63 min
Jul 20, 11:14 AM CDTFlash Flood WarningILXMorgan3 hr
Jul 20, 3:11 PM CDTExcessive Heat WarningILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more4 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.