Alert archive / Illinois / Flash Flood Warnings in 2016

Flash Flood Warning 2, NWS St. Louis, MO

May 11, 20165 counties in Illinois; Jefferson County, Sainte Genevieve County, Missouri

NWS St. Louis, MO issued this flash flood warning at May 11, 2016, 3:52 PM CDT for 5 counties in Illinois; Jefferson County, Sainte Genevieve County, Missouri. 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: May 11, 2016, 3:52 PM CDT (20:52 UTC)
Expired: May 11, 2016, 7:45 PM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Clinton County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Jefferson County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 93 km from the middle of the area, began a volume at 20:55 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
May 11, 6:00 PM CDT	FLASH FLOOD	Maeystown, IL	MAEYSTOWN CREEK OUT OF BANKS AND FLOODING SOME OF THE ROADS IN TOWN.
May 11, 6:10 PM CDT	FLASH FLOOD	4 Se Olympian Village, MO	ROUTE T CLOSED IN BOTH DIRECTIONS DUE TO FLOODING.

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, 8.9 hours before the alert went out and 235 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 905 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

602 
WGUS53 KLSX 112052
FFWLSX
ILC027-133-157-163-189-MOC099-186-120045-
/O.NEW.KLSX.FF.W.0002.160511T2052Z-160512T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
352 PM CDT WED MAY 11 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...
  CENTRAL CLINTON COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHEASTERN ST. CLAIR COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHERN RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS...
  MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEASTERN MISSOURI...
  SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 745 PM CDT

* AT 349 PM CDT...EMERGENCY MANAGEMENT OFFICIALS REPORTED SEVERAL
  ROADS WITH UP TO A FOOT OF WATER OVER THEM...INCLUDING ILLINOIS
  ROUTE 3 WEST OF RED BUD. UP TO TWO INCHES OF RAIN...WITH ISOLATED
  HIGHER AMOUNTS HAVE ALREADY FALLEN. AN ADDITIONAL INCH OR TWO IS
  POSSIBLE OVER THE NEXT HOUR OR SO.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FESTUS...WATERLOO...MASCOUTAH...PEVELY...CRYSTAL CITY...FREEBURG...
  SPARTA...RED BUD...HERCULANEUM...CARLYLE...NASHVILLE...CENTRALIA...
  SMITHTON...NEW ATHENS...MARISSA...OKAWVILLE...GERMANTOWN...VALMEYER...
  WAMAC AND COULTERVILLE.

 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3822 8959 3810 8959 3805 9039 3817 9046
      3834 9036 3866 8915 3821 8915

$$

BYRD

1 follow-up statement

308 
WGUS73 KLSX 120038
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
738 PM CDT WED MAY 11 2016

ILC027-133-157-163-189-MOC099-186-120047-
/O.EXP.KLSX.FF.W.0002.000000T0000Z-160512T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON IL-CLINTON IL-ST. CLAIR IL-RANDOLPH IL-MONROE IL-
STE. GENEVIEVE MO-JEFFERSON MO-
738 PM CDT WED MAY 11 2016

...THE FLASH FLOOD WARNING FOR WASHINGTON...CENTRAL CLINTON...
SOUTHEASTERN ST. CLAIR...NORTHERN RANDOLPH...MONROE...NORTHWESTERN
STE. GENEVIEVE AND SOUTHEASTERN JEFFERSON COUNTIES WILL EXPIRE AT 745
PM CDT...

FLOOD WATERS HAVE RECEDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 3822 8959 3810 8959 3805 9039 3817 9046
      3834 9036 3866 8915 3821 8915

$$

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 3:19 AM CDT	Dense Fog Advisory	LSX	Bond, Brown, Calhoun, Clinton, Fayette, Greene and 10 more	6 hr
May 11, 1:08 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	52 min
May 11, 1:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	48 min
May 11, 1:51 PM CDT	Severe Thunderstorm Warning	LSX	Madison, Saint Clair	54 min
May 11, 1:55 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	65 min
May 11, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 2:32 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Madison, Washington	43 min
May 11, 3:02 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	43 min
May 11, 3:13 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Washington	47 min
May 11, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph, Saint Clair	45 min
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	33 min
May 11, 3:57 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	63 min
May 11, 3:59 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	19 min
May 11, 4:45 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	60 min
May 11, 5:23 PM CDT	Severe Thunderstorm Warning	LSX	Randolph	52 min
May 11, 5:26 PM CDT	Flash Flood Warning	LSX	Randolph	4 hr
May 11, 6:50 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Pike	40 min
May 11, 10:08 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	52 min
May 11, 10:25 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway	50 min
May 11, 10:52 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery, Pike	38 min
May 11, 11:24 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike	51 min
May 11, 12:26 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	49 min
May 11, 12:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	46 min
May 11, 12:47 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Louis	28 min
May 11, 3:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	49 min
May 11, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois, Washington	40 min
May 11, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike, Ralls	44 min
May 11, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	27 min
May 11, 5:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Osage, Warren	42 min
May 11, 5:35 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery	40 min
May 11, 5:45 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois, Washington	45 min
May 11, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Lincoln, Montgomery, Pike, Ralls	64 min
May 11, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Lincoln, Montgomery, Warren	48 min
May 11, 6:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	46 min
May 11, 6:42 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	48 min

Nearby

Flash Flood Warnings in Illinois, 2016 Flash Flood Warnings in Missouri, 2016 Every flash flood warning in 2016

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.