Alert archive / Illinois / Flash Flood Warnings in 2012

Flash Flood Warning 3, NWS Lincoln, IL

May 6, 2012Vermilion County, Illinois

NWS Lincoln, IL issued this flash flood warning at May 6, 2012, 6:09 PM CDT for Vermilion County, Illinois. It was in force for 6 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
May 6, 2012, 6:09 PM CDT (23:09 UTC)
Expired
May 7, 2012, 12:00 AM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Storm-based polygon
Flood severity
None

County Vermilion County, IL

The radar

The Chicago radar (KLOT), 134 km from the middle of the area, began a volume at 23:12 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, 11.2 hours before the alert went out and 88 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 2012-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2922 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 2012-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 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
2922 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
576 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
98 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.

809 
WGUS53 KILX 062309
FFWILX
ILC183-070500-
/O.NEW.KILX.FF.W.0003.120506T2309Z-120507T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
609 PM CDT SUN MAY 6 2012

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN VERMILION COUNTY IN EAST CENTRAL ILLINOIS...

* UNTIL MIDNIGHT CDT

* AT 607 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SLOW
  MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
  AREA. RADAR ESTIMATES UP TO TWO INCHES OF RAIN HAS FALLEN
  SINCE 4 PM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  HOOPESTON.

LAW ENFORCEMENT REPORTED FLOODED ROADS ACROSS HOOPESTON.

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 4037 8764 4048 8777 4049 8777 4050 8776
      4050 8753 4049 8752 4037 8752

$$

BAK
2 follow-up statements
519 
WGUS73 KILX 070302
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1002 PM CDT SUN MAY 6 2012

ILC183-070500-
/O.CON.KILX.FF.W.0003.000000T0000Z-120507T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VERMILION IL-
1002 PM CDT SUN MAY 6 2012

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN VERMILION
COUNTY UNTIL MIDNIGHT CDT...

AT 1001 PM CDT...WEATHER SPOTTERS REPORTED THAT FLASH FLOODING WAS 
OCCURRING IN AND AROUND HOOPESTON THIS EVENING. THIS AREA RECEIVED
BETWEEN 2 TO 4 INCHES OF RAIN LATE THIS AFTERNOON FROM SLOW MOVING 
THUNDERSTORMS. 

SOME LOCATIONS THAT WILL CONTINUE TO EXPERIENCE FLASH FLOODING 
INCLUDE...HOOPESTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 4037 8764 4048 8777 4049 8777 4050 8776
      4050 8753 4049 8752 4037 8752

$$
262 
WGUS73 KILX 070500
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1200 AM CDT MON MAY 7 2012

ILC183-070513-
/O.EXP.KILX.FF.W.0003.000000T0000Z-120507T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
VERMILION IL-
1200 AM CDT MON MAY 7 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHEASTERN
VERMILION COUNTY WILL BE ALLOWED TO EXPIRE AT MIDNIGHT CDT...

LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT THE EXCESS RUNOFF FROM 
HEAVY RAIN 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 4037 8764 4048 8777 4049 8777 4050 8776
      4050 8753 4049 8752 4037 8752

$$

SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 2:06 PM CDTSevere Thunderstorm WarningILXKnox, Peoria, Stark54 min
May 6, 2:36 PM CDTTornado WarningILXMarshall, Stark39 min
May 6, 3:07 PM CDTTornado WarningILXMarshall53 min
May 6, 3:46 PM CDTAreal Flood AdvisoryILXMarshall, Stark6 hr
May 6, 4:03 PM CDTSevere Thunderstorm WarningILXChampaign, Vermilion57 min
May 6, 5:00 PM CDTSevere Thunderstorm WarningILXVermilion45 min
May 6, 5:21 PM CDTTornado WarningILXVermilion39 min
May 6, 6:48 PM CDTSpecial Weather StatementILXVermilion27 min

Nearby

Flash Flood Warnings in Illinois, 2012Every flash flood warning in 2012

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.