Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 39, NWS Lincoln, IL

September 9, 2014Morgan County, Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Sep 9, 2014, 2:18 PM CDT for Morgan County, Sangamon County, Illinois. It was in force for 4 hr. 2 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
Sep 9, 2014, 2:18 PM CDT (19:18 UTC)
Expired
Sep 9, 2014, 6:00 PM CDT
In force
4 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

Counties Morgan County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 69 km from the middle of the area, began a volume at 19:19 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 9, 4:45 PM CDTHEAVY RAIN 3.17New Berlin, ILMEASURED 3.17 INCHES OF RAIN TODAY
Sep 9, 6:00 PM CDTHEAVY RAIN 1.35Auburn, ILMEASURED 1.35 INCHES OF RAIN TODAY

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, 7.3 hours before the alert went out and 118 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 2014-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 278 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 2014-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
278 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1161 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 091918
FFWILX
ILC137-167-092300-
/O.NEW.KILX.FF.W.0039.140909T1918Z-140909T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
218 PM CDT TUE SEP 9 2014

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN MORGAN COUNTY IN WEST CENTRAL ILLINOIS...
  SOUTHWESTERN SANGAMON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 600 PM CDT

* AT 216 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. DOPPLER RADAR ESTIMATED 2 TO 3 INCHES OF RAIN EARLY
  THIS AFTERNOON...PARTICULARLY FROM NEW BERLIN TO LOAMI. AN 
  ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE IN THIS AREA INTO
  EARLY EVENING.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ALEXANDER...AUBURN...CHATHAM...DIVERNON...FRANKLIN...LOAMI...NEW
  BERLIN AND WAVERLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3973 8965 3954 8965 3953 9006 3974 9008

$$

MILLER
2 follow-up statements
050 
WGUS73 KILX 092027
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
327 PM CDT TUE SEP 9 2014

ILC137-167-092300-
/O.CON.KILX.FF.W.0039.000000T0000Z-140909T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORGAN IL-SANGAMON IL-
327 PM CDT TUE SEP 9 2014

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHWESTERN SANGAMON
AND SOUTHEASTERN MORGAN COUNTIES UNTIL 600 PM CDT...

AT 323 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL FROM NEW BERLIN TO AUBURN
IN SANGAMON COUNTY. DOPPLER RADAR ESTIMATED 2 TO 3 INCHES OF RAIN
HAS OCCURRED BETWEEN WAVERLY AND AUBURN BETWEEN 215 AND 315 PM. AN
ADDITIONAL ONE-HALF TO ONE INCH OF RAIN IS ANTICIPATED THROUGH
430 PM.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
ALEXANDER...AUBURN...CHATHAM...DIVERNON...FRANKLIN...LOAMI...NEW
BERLIN AND WAVERLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3973 8965 3954 8965 3953 9006 3974 9008

$$

MILLER
471 
WGUS73 KILX 092300
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
600 PM CDT TUE SEP 9 2014

ILC137-167-092314-
/O.EXP.KILX.FF.W.0039.000000T0000Z-140909T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORGAN IL-SANGAMON IL-
600 PM CDT TUE SEP 9 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHWESTERN
SANGAMON AND SOUTHEASTERN MORGAN COUNTIES WILL BE ALLOWED TO EXPIRE
AT 600 PM CDT...

EXCESS RUNOFF FROM HEAVY RAIN SOUTHWEST OF SPRINGFIELD DURING THIS 
AFTERNOON HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE 
WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...ENDING THE 
FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO 
YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3973 8965 3954 8965 3953 9006 3974 9008

$$

07

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 2:43 AM CDTSpecial Weather StatementILXStark62 min
Sep 9, 2:45 AM CDTSpecial Weather StatementILXStark60 min
Sep 9, 3:38 AM CDTSpecial Weather StatementILXMarshall, Woodford52 min
Sep 9, 5:15 AM CDTAreal Flood AdvisoryILXKnox, Marshall, Peoria, Stark4 hr
Sep 9, 6:32 AM CDTSpecial Weather StatementILXMason58 min
Sep 9, 7:07 AM CDTAreal Flood AdvisoryILXMcLean4 hr
Sep 9, 8:44 AM CDTSpecial Weather StatementILXMason61 min
Sep 9, 9:14 AM CDTSevere Thunderstorm WarningILXCass, Mason, Schuyler46 min
Sep 9, 9:25 AM CDTSevere Thunderstorm WarningILXCass, Morgan, Scott32 min
Sep 9, 9:55 AM CDTSpecial Weather StatementILXLogan65 min
Sep 9, 10:17 AM CDTSpecial Weather StatementILXMacon, Piatt58 min
Sep 9, 10:30 AM CDTAreal Flood AdvisoryILXLogan3 hr
Sep 9, 11:08 AM CDTAreal Flood AdvisoryILXCass, Fulton, Mason, Schuyler3 hr
Sep 9, 11:26 AM CDTFlash Flood WarningILXCass, Fulton, Mason, Schuyler3 hr
Sep 9, 12:43 PM CDTFlash Flood WarningILXCass, Morgan, Schuyler6 hr
Sep 9, 1:48 PM CDTFlash Flood WatchILXCass, Champaign, Christian, Coles, DeWitt, Douglas and 21 more30 hr

Nearby

Flash Flood Warnings in Illinois, 2014Every flash flood warning in 2014

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.