Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 14, NWS St. Louis, MO

June 11, 2014Macoupin County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 11, 2014, 1:29 AM CDT for Macoupin County, Illinois. It was in force for 8 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: Jun 11, 2014, 1:29 AM CDT (06:29 UTC)
Expired: Jun 11, 2014, 9:30 AM CDT
In force: 8 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Macoupin County, IL

The radar

The Lincoln radar (KILX), 95 km from the middle of the area, began a volume at 06:30 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

Time	Report	Where	Remark
Jun 11, 1:29 AM CDT	FLASH FLOOD	3 Ssw Carlinville, IL	ILLINOIS ROUTE 5 CLOSED DUE TO RUNNING WATER OVER ROADWAY.
Jun 11, 1:29 AM CDT	FLASH FLOOD	5 Nw Palmyra, IL	VEHICLE SUBMERGED ON WEST COUNTY LANE ROAD NEAR QUAIL LANE.

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, 6.5 hours before the alert went out and 135 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 95 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 65 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

334 
WGUS53 KLSX 110629
FFWLSX
ILC117-111430-
/O.NEW.KLSX.FF.W.0014.140611T0629Z-140611T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
129 AM CDT WED JUN 11 2014

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN MACOUPIN COUNTY IN SOUTHWEST ILLINOIS...

* UNTIL 930 AM CDT

* AT 127 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED SLOW
  MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED    
  AREA. THERE WAS A SUBMERGED VEHICLE ALONG WEST COUNTY LINE ROAD    
  WEST NEAR QUAIL LANE. IN ADDITION...NUMEROUS OTHER COUNTY ROADS
  ARE CLOSED/IMPASSIBLE DUE TO DEEP SWIFT FLOWING WATER.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CARLINVILLE...VIRDEN...GIRARD AND PALMYRA.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO AN INCH ARE POSSIBLE IN THE 
WARNED AREA WITH LOCALLY HIGHER AMOUNTS POSSIBLE...ESPECIALLY NEAR
THE GREENE COUNTY LINE.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.

&&

LAT...LON 3952 8970 3941 8970 3926 8971 3924 8970
      3923 9015 3952 9015

$$

GOSSELIN

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 7:22 PM CDT	Flash Flood Warning	LSX	Macoupin	6 hr
Jun 10, 9:07 PM CDT	River Flood Warning	LSX	Jersey	52 hr
Jun 11, 12:39 AM CDT	Areal Flood Advisory	LSX	Calhoun, Greene, Jersey, Pike	9 hr
Jun 11, 1:02 AM CDT	Flash Flood Warning	LSX	Greene	8 hr
Jun 11, 8:56 AM CDT	Areal Flood Warning	LSX	Greene	10 hr
Jun 11, 11:47 AM CDT	River Flood Warning	LSX	Jackson, Randolph	5 days
Jun 11, 11:58 AM CDT	River Flood Warning	LSX	Calhoun, Greene, Jersey	5 days

Nearby

Flash Flood Warnings in Illinois, 2014 Every 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.