Alert archive / Illinois / Flash Flood Warnings in 2015

Flash Flood Warning 68, NWS Lincoln, IL

September 1, 2015Piatt County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 1, 2015, 7:49 PM CDT for Piatt 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
Sep 1, 2015, 7:49 PM CDT (00:49 UTC)
Expired
Sep 1, 2015, 10:45 PM CDT
In force
3 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Piatt County, IL

The radar

The Lincoln radar (KILX), 68 km from the middle of the area, began a volume at 00:51 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
Sep 1, 7:50 PM CDTHEAVY RAIN 1.5De Land, ILMOST OF THE RAIN FELL IN THE PAST HOUR

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, 0.8 hours before the alert went out and 10 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 2015-09-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1021 joules per kilogram.LCLEL10008507005003002001001 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 2015-09-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939Sfc1 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
1021 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1858 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

278 
WGUS53 KILX 020049
FFWILX
ILC147-020345-
/O.NEW.KILX.FF.W.0068.150902T0049Z-150902T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
749 PM CDT TUE SEP 1 2015

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL PIATT COUNTY IN CENTRAL ILLINOIS...

* UNTIL 1045 PM CDT
    
* AT 748 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  MONTICELLO...DE LAND...WHITE HEATH AND LODGE. 

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE POSSIBLE IN THE 
WARNED AREA.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 160 AND 173.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4014 8847 3994 8847 3998 8869 4015 8864

$$

ONTON
2 follow-up statements
741 
WGUS73 KILX 020244
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
944 PM CDT TUE SEP 1 2015

ILC147-020345-
/O.CON.KILX.FF.W.0068.000000T0000Z-150902T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIATT-
944 PM CDT TUE SEP 1 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
CENTRAL PIATT COUNTY...

AT 938 PM CDT...RAINFALL FROM EARLIER THUNDERSTORMS HAS ENDED. 
EARLIER THUNDERSTORMS PRODUCED A RADAR INDICATED AMOUNT UP TO 4 
INCHES BETWEEN MONTICELLO...DE LAND...AND LODGE. FLASH FLOODING 
LIKELY CONTINUES IN THIS AREA.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 160 AND 173.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4014 8847 3994 8847 3998 8869 4015 8864

$$

ONTON
978 
WGUS73 KILX 020342
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1042 PM CDT TUE SEP 1 2015

ILC147-020349-
/O.EXP.KILX.FF.W.0068.000000T0000Z-150902T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIATT-
1042 PM CDT TUE SEP 1 2015

...THE FLASH FLOOD WARNING FOR CENTRAL PIATT COUNTY WILL EXPIRE AT
1045 PM CDT...

FLOOD WATERS ARE RECEDING...AND ARE NO LONGER EXPECTED TO POSE A 
THREAT TO LIFE OR PROPERTY. PLEASE CONTINUE TO HEED ANY ROAD 
CLOSURES. 

LAT...LON 4014 8847 3994 8847 3998 8869 4015 8864

$$

ONTON

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 7:09 PM CDTSpecial Weather StatementILXMacon36 min
Sep 1, 7:20 PM CDTSpecial Weather StatementILXPiatt25 min

Nearby

Flash Flood Warnings in Illinois, 2015Every flash flood warning in 2015

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.