Alert archive / Illinois / Flash Flood Warnings in 2006

Flash Flood Warning 2, NWS St. Louis, MO

March 12, 2006Clinton County, Marion County, Washington County, Illinois

NWS St. Louis, MO issued this flash flood warning at Mar 12, 2006, 1:57 AM CST for Clinton County, Marion County, Washington County, Illinois. It was in force for 6 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: Mar 12, 2006, 1:57 AM CST (07:57 UTC)
Expired: Mar 12, 2006, 8:00 AM CST
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Clinton County, IL, Marion County, IL, Washington County, IL

The radar

The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 07:58 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
Mar 12, 3:00 AM CST	FLASH FLOOD	Nashville, IL	NUMEROUS REPORTS OF FLOODING PARTICULARLY IN THE SOUTH HALF OF WASHINGTON COUNTY. HIGHWAYS 160, 115 WERE IMPASSABLE AND THE DUBOIS BLACKTOP WAS FLOODED FOR NEARLY ONE MILE. HIGHWAY 127 1 MILE N OF NASHVILLE WAS ALSO CLOSED.
Mar 12, 3:00 AM CST	FLASH FLOOD	Salem, IL	NUMEROUS LOCAL ROADS CLOSED IN MARION COUNTY.

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, 8.0 hours before the alert went out and 183 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: 789 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 708 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 120803
FFWLSX
ILC027-121-189-121400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
157 AM CST SUN MAR 12 2006

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS
  MARION COUNTY IN SOUTH CENTRAL ILLINOIS
  WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 800 AM CST

* AT 154 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THAT VERY HEAVY RAIN HAS FALLEN ACROSS THE WARNED AREA AND THAT    
  FLASH FLOODING CAN BE EXPECTED.  ADDITIONALLY...AREA LAW           
  ENFORCEMENT AGENCIES HAVE INDICATED THAT THERE HAVE BEEN SEVERAL   
  ROAD CLOSURES DUE TO HIGH WATER.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING ASHLEY...WAMAC...TRENTON...STEPHEN FORBES STATE PARK...
  ST. ROSE...SHATTUC...SANDOVAL...SALEM...PATOKA...OMEGA...
  OKAWVILLE...ODIN...NEW MEMPHIS...NEW BADEN...NASHVILLE...
  KINMUNDY...JAMESTOWN...IRVINGTON...HELM...GERMANTOWN...FAIRMAN...
  CENTRALIA...CENTRAL CITY...CARLYLE...BREESE...BOULDER...
  BECKEMEYER...AVISTON AND ALBERS.

ADDITIONAL RAINFALL THROUGHOUT THE OVERNIGHT HOURS WILL INCREASE THE 
FLASH FLOOD THREAT.  PEOPLE ARE URGED TO MONITOR WATER LEVELS IN 
AREA CREEKS AND STREAMS AND TO MOVE TO HIGHER GROUND IF HIGH WATER 
THREATENS.  DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.  
MOST FLOODING DEATHS ARE IN AUTOMOBILES THAT ARE SWEPT AWAY IN FLOOD 
WATERS OR GET STALLED OUT WHILE DRIVING THROUGH HIGH STANDING WATER. 
DARKNESS CAN CONCEAL THE DANGERS OF FLOODING...SO USE EXTRA CAUTION 
WHILE DRIVING AT NIGHT. 

LAT...LON 3847 8871 3848 8914 3821 8916 3822 8971
      3865 8970 3865 8961 3873 8959 3874 8915
      3882 8913 3882 8871

$$

CARNEY

2 follow-up statements

000 
WGUS73 KLSX 121216
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
607 AM CST SUN MAR 12 2006

ILC027-121-189-121400-
WASHINGTON IL-CLINTON IL-MARION IL-
607 AM CST SUN MAR 12 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 800 AM CST FOR
MARION...CLINTON AND WASHINGTON COUNTIES...

AT 507 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES
THE RAIN HAS SHIFTED TO THE SOUTH AND EAST FOR THE TIME
BEING.  

MOST OF THE SERIOUS FLOODING HAS OCCURRED IN WASHINGTON COUNTY. 
HIGHWAYS 115...160 NEAR 115...ROADS IN THE COMMUNITY OF OKAWVILLE
...AND HIGHWAY 127 ONE MILE NORTH OF NASHVILLE AND FURTHER NORTH
NEAR INTERSTATE 64 ARE CLOSED AND THE DUBOIS BLACKTOP WEST OF
DUBOIS HAS WATER COVERING IT FOR NEARLY A MILE. FIELDS ACROSS
SOUTHERN WASHINGTON COUNTY ARE MOSTLY COVERED WITH WATER. 

A FLASH FLOOD WATCH IS STILL IN EFFECT THROUGH TONIGHT AS WELL
BECAUSE WE EXPECT MORE RAIN LATER TODAY AND TONIGHT. 


LAT...LON 3847 8871 3848 8914 3821 8916 3822 8971
      3865 8970 3865 8961 3873 8959 3874 8915
      3882 8913 3882 8871

$$

PEDIGO

000 
WGUS73 KLSX 121352
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
740 AM CST SUN MAR 12 2006

ILC027-121-189-121350-
WASHINGTON IL-CLINTON IL-MARION IL-
740 AM CST SUN MAR 12 2006

...THE FLASH FLOOD WARNING FOR MARION...CLINTON AND WASHINGTON
COUNTIES IS CANCELLED...

RAINFALL AMOUNTS OF UP TO 4 INCHES OCCURRED OVERNIGHT IN SOUTHERN
PORTIONS OF WASHINGTON COUNTY.  SEVERAL ROADS ARE STILL COVERED WITH
WATER AND SOME ARE STILL CLOSED.

NEW SHOWERS AND THUNDERSTORMS WILL REDEVELOP LATER TODAY AND 
CONTINUE THROUGH MUCH OF THE NIGHT TONIGHT WITH ADDITIONAL HEAVY
PRECIPITATION.  SINCE THE GROUND IS NOW SATURATED...ANY RUNOFF
COULD RESULT IN SIGNIFICANT FLOODING.  A FLASH FLOOD WATCH REMAINS
IN EFFECT THROUGH 600AM MONDAY MORNING.

IN ADDITION THERE IS A MODERATE RISK FOR SEVERE STORMS TODAY AND 
TONIGHT WITH VERY LARGE HAIL...DAMAGING WINDS...AND LON-LIVED 
TORNADOES.  THIS IS AN UNUSUALLY DANGEROUS SITUATION THAT WILL
BE PERSISTENT THROUGH THE NIGHT.  KEEP ABREAST OF LOCAL WEATHER
DEVELOPMENTS AND THE LATEST STATEMENTS...WATCHES...AND WARNINGS
FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 3847 8871 3848 8914 3821 8916 3822 8971
      3865 8970 3865 8961 3873 8959 3874 8915
      3882 8913 3882 8871

$$

PEDIGO

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 11, 8:14 PM CST	Severe Thunderstorm Warning	LSX	Montgomery	21 min
Mar 11, 9:39 PM CST	Tornado Warning	LSX	Randolph	51 min
Mar 11, 9:42 PM CST	Tornado Warning	LSX	Monroe	39 min
Mar 11, 10:13 PM CST	Tornado Warning	LSX	Washington	62 min
Mar 11, 10:30 PM CST	Severe Thunderstorm Warning	LSX	Randolph	60 min
Mar 11, 10:54 PM CST	Severe Thunderstorm Warning	LSX	Marion	41 min
Mar 11, 11:11 PM CST	Tornado Warning	LSX	Randolph	28 min
Mar 11, 11:30 PM CST	Severe Thunderstorm Warning	LSX	Washington	38 min
Mar 11, 11:37 PM CST	Severe Thunderstorm Warning	LSX	Monroe	15 min
Mar 12, 12:44 AM CST	Flash Flood Warning	LSX	Monroe, Randolph	6 hr
Mar 12, 12:59 AM CST	Severe Thunderstorm Warning	LSX	Monroe	19 min
Mar 12, 1:03 AM CST	Severe Thunderstorm Warning	LSX	Randolph	20 min
Mar 12, 11:24 AM CST	Tornado Warning	LSX	Adams, Pike	36 min
Mar 12, 11:51 AM CST	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	39 min

Nearby

Flash Flood Warnings in Illinois, 2006 Every flash flood warning in 2006

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.