Alert archive / Missouri / Flash Flood Warnings in 2016

Flash Flood Warning 4, NWS St. Louis, MO

May 11, 2016Monroe County, Randolph County, Illinois; 5 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at May 11, 2016, 9:18 PM CDT for Monroe County, Randolph County, Illinois; 5 counties in Missouri. It was in force for 6 hr. 1 report 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, 9:18 PM CDT (02:18 UTC)
Expired: May 12, 2016, 3:15 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Monroe County, IL, Randolph County, IL, Crawford County, MO, Franklin County, MO, Jefferson County, MO, Sainte Genevieve County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 71 km from the middle of the area, began a volume at 02:18 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, 9:30 PM CDT	FLASH FLOOD	Richwoods, MO	HIGHWAY 47 NEAR RICHWOODS IS CLOSED DUE TO WATER OVER THE ROADWAY. MULTIPLE COUNTY ROADS CLOSED IN THE NORTHERN PART OF WASHINGTON 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, 2.3 hours before the alert went out and 294 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: 748 J/kg
Mixed-layer CIN: -157 J/kg
Mixed-layer LCL: 1145 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 199 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

As transmitted.

453 
WGUS53 KLSX 120218
FFWLSX
ILC133-157-MOC055-071-099-186-221-120815-
/O.NEW.KLSX.FF.W.0004.160512T0218Z-160512T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN RANDOLPH COUNTY IN SOUTHWESTERN ILLINOIS...
  SOUTHWESTERN MONROE COUNTY IN SOUTHWESTERN ILLINOIS...
  NORTHWESTERN STE. GENEVIEVE COUNTY IN SOUTHEASTERN MISSOURI...
  SOUTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
  SOUTH CENTRAL FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  NORTHEASTERN CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 315 AM CDT

* AT 916 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS NORTHERN WASHINGTON
  COUNTY. UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY. AN ADDITIONAL INCH OR TWO
  OF RAIN IS POSSIBLE OVER THE NEXT COUPLE OF HOURS.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FESTUS...SULLIVAN...DE SOTO...CRYSTAL CITY...HERCULANEUM...HILLSBORO...
  ANTHONIES MILL...OLYMPIAN VILLAGE...OLD MINES...RICHWOODS...HORINE...
  PRAIRIE DU ROCHER...RUMA...MAEYSTOWN...ST. CLOUD...FULTS...MAPAVILLE...
  BURKSVILLE...KIDD AND VICTORIA.

THIS ALSO INCLUDES  WASHINGTON STATE PARK...ONONDAGA CAVE STATE
PARK... AND MERAMEC STATE PARK.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...FARMLAND...AND OTHER LOW LYING
SPOTS.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

&&

LAT...LON 3796 9121 3820 9122 3828 9015 3810 8996
      3800 9061 3801 9063 3807 9061 3808 9064
      3795 9065

$$

BYRD

1 follow-up statement

743 
WGUS73 KLSX 120817
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
317 AM CDT THU MAY 12 2016

ILC133-157-MOC055-071-099-186-221-120826-
/O.EXP.KLSX.FF.W.0004.000000T0000Z-160512T0815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANDOLPH IL-MONROE IL-STE. GENEVIEVE MO-JEFFERSON MO-FRANKLIN MO-
CRAWFORD MO-WASHINGTON MO-
317 AM CDT THU MAY 12 2016

...THE FLASH FLOOD WARNING FOR NORTHWESTERN RANDOLPH...SOUTHWESTERN
MONROE...NORTHWESTERN STE. GENEVIEVE...SOUTHERN JEFFERSON...SOUTH
CENTRAL FRANKLIN...NORTHEASTERN CRAWFORD AND NORTHERN WASHINGTON
COUNTIES HAS EXPIRED...

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

LAT...LON 3796 9121 3820 9122 3828 9015 3810 8996
      3800 9061 3801 9063 3807 9061 3808 9064
      3795 9065

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:08 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	52 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	48 min
May 11, 8:15 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey, Madison	45 min
May 11, 8:28 PM CDT	Severe Thunderstorm Warning	LSX	Brown	8 min
May 11, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Monroe	42 min
May 11, 9:29 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Randolph	61 min
May 11, 9:53 PM CDT	Severe Thunderstorm Warning	LSX	Adams	52 min
May 11, 10:31 PM CDT	Severe Thunderstorm Warning	LSX	Randolph, Saint Clair, Washington	59 min
May 12, 9:36 AM CDT	River Flood Warning	LSX	Jackson, Randolph	5 days
May 11, 7:14 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 7:19 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Jefferson, Saint Charles, Saint Louis, Warren	41 min
May 11, 7:24 PM CDT	Severe Thunderstorm Warning	LSX	Washington	36 min
May 11, 7:33 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Pike, Ralls	42 min
May 11, 7:57 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	48 min
May 11, 7:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
May 11, 8:03 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Washington	42 min
May 11, 8:15 PM CDT	Tornado Warning	LSX	Crawford, Franklin, Washington	30 min
May 11, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	45 min
May 11, 9:24 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve, Saint Francois	6 hr
May 11, 9:24 PM CDT	Special Weather Statement	LSX	Callaway	51 min
May 11, 9:28 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	47 min
May 11, 10:14 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	46 min
May 11, 11:51 PM CDT	Flash Flood Warning	LSX	Crawford, Iron, Madison, Sainte Genevieve, Saint Francois, Washington	6 hr
May 12, 9:12 AM CDT	River Flood Warning	LSX	Jefferson	3 days
May 12, 10:21 AM CDT	River Flood Warning	LSX	Reynolds	45 hr
May 12, 2:41 PM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	4 days

Nearby

Flash Flood Warnings in Missouri, 2016 Flash Flood Warnings in Illinois, 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.