Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 1, NWS Lincoln, IL

February 20, 2014Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Feb 20, 2014, 4:09 PM CST for Sangamon County, Illinois. It was in force for 5 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
Feb 20, 2014, 4:09 PM CST (22:09 UTC)
Expired
Feb 20, 2014, 9:00 PM CST
In force
5 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Sangamon County, IL

The radar

The Lincoln radar (KILX), 49 km from the middle of the area, began a volume at 22:10 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, 10.2 hours before the alert went out and 92 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 2014-02-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2014-02-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 582 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
507 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
582 m²/s²
0-3 km storm-relative helicity
576 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.

502 
WGUS53 KILX 202209
FFWILX
ILC167-210300-
/O.NEW.KILX.FF.W.0001.140220T2209Z-140221T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
409 PM CST THU FEB 20 2014

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 900 PM CST

* AT 406 PM CST...EMERGENCY MANAGEMENT REPORTED FLOODING DUE TO SLOW
  MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
  AREA. ONE CAR RESCUE WAS BEING CONDUCTED NEAR RIVERTON DUE TO 
  A STRANDED MOTORIST ON COUNTY ROAD 54. ALSO...ROADS IN BUFFALO
  WERE REPORTED COMPLETELY COVERED IN WATER...AND BARRACADES BEING
  PUT UP.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SPRINGFIELD...AUBURN...CHATHAM...DIVERNON...ILLIOPOLIS...
  MECHANICSBURG...PAWNEE...RIVERTON...ROCHESTER AND SHERMAN.

NUMEROUS LOCATIONS IN THE CITY OF SPRINGFIELD ARE ALSO EXPERIENCING 
WATER COVERING STREETS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 3964 8985 3984 8975 3995 8955 3992 8941
      3991 8923 3984 8922 3974 8939 3974 8941
      3976 8943 3971 8943 3964 8954 3952 8960
      3952 8988

$$

SHIMON
1 follow-up statement
203 
WGUS73 KILX 210301
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
901 PM CST THU FEB 20 2014

ILC167-210314-
/O.EXP.KILX.FF.W.0001.000000T0000Z-140221T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SANGAMON IL-
901 PM CST THU FEB 20 2014

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SANGAMON COUNTY
WILL BE ALLOWED TO EXPIRE AT 900 PM CST...

THIS WARNING HAS BEEN REPLACED BY AN AREAL FLOOD WARNING UNTIL 5 AM.

THOUGH THE THREAT FOR FLASH FLOODING HAS ENDED...A FLOODING THREAT
REMAINS WITH STANDING WATER MAINLY IN RURAL AREAS.  AN AREAL FLOOD
WARNING HAS REPLACED THIS WARNING AND IS IN EFFECT UNTIL 5 AM. 
IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL 
LAW ENFORCEMENT AGENCY.

LAT...LON 3964 8985 3984 8975 3995 8955 3992 8941
      3991 8923 3984 8922 3974 8939 3974 8941
      3976 8943 3971 8943 3964 8954 3952 8960
      3952 8988

$$

HJS

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 19, 8:02 PM CSTRiver Flood WarningILXClay, Richland7 days
Feb 19, 9:16 PM CSTHigh Wind WatchILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more6 hr
Feb 19, 11:12 PM CSTRiver Flood WarningILXFulton, Knox5 days
Feb 19, 11:12 PM CSTRiver Flood WarningILXFulton4 days
Feb 20, 3:15 AM CSTHigh Wind WarningILXCass, Champaign, Christian, DeWitt, Douglas, Edgar and 19 more20 hr
Feb 20, 3:15 AM CSTWind AdvisoryILXCass, Champaign, Christian, Clark, Clay, Coles and 29 more24 hr
Feb 20, 11:46 AM CSTAreal Flood WarningILXKnox, Stark5 hr
Feb 20, 2:20 PM CSTSevere Thunderstorm WarningILXCass, Mason, Menard, Morgan, Sangamon, Schuyler and 1 more40 min
Feb 20, 2:40 PM CSTDense Fog AdvisoryILXFulton, Knox, McLean, Marshall, Peoria, Stark and 2 more2 hr
Feb 20, 2:45 PM CSTSevere Thunderstorm WarningILXFulton, Schuyler30 min
Feb 20, 2:49 PM CSTTornado WarningILXCass, Mason, Morgan, Scott26 min
Feb 20, 3:17 PM CSTSevere Thunderstorm WarningILXMason, Menard28 min
Feb 20, 3:29 PM CSTSevere Thunderstorm WarningILXChristian, Sangamon31 min
Feb 20, 3:49 PM CSTTornado WarningILXChristian, Sangamon26 min
Feb 20, 4:01 PM CSTSevere Thunderstorm WarningILXChristian, Coles, Douglas, Macon, Moultrie, Piatt and 1 more59 min
Feb 20, 4:08 PM CSTTornado WarningILXDeWitt, Logan, Macon, Sangamon22 min
Feb 20, 4:11 PM CSTTornado WarningILXChristian, Shelby34 min
Feb 20, 4:40 PM CSTTornado WarningILXColes, Douglas, Moultrie, Piatt, Shelby35 min
Feb 20, 4:47 PM CSTTornado WarningILXEffingham, Moultrie, Shelby28 min
Feb 20, 5:06 PM CSTSevere Thunderstorm WarningILXClark, Coles, Crawford, Cumberland, Douglas, Edgar and 3 more54 min
Feb 20, 5:12 PM CSTTornado WarningILXColes, Douglas, Edgar33 min
Feb 20, 5:14 PM CSTTornado WarningILXClark, Coles, Cumberland, Edgar31 min
Feb 20, 5:42 PM CSTFlash Flood WarningILXDeWitt, Macon, Moultrie, Piatt, Shelby6 hr
Feb 20, 5:45 PM CSTTornado WarningILXEdgar, Vermilion30 min
Feb 20, 5:48 PM CSTFlash Flood WarningILXChampaign, Clark, Clay, Coles, Crawford, Cumberland and 7 more6 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.