Alert archive / Missouri / Flash Flood Warnings in 2011

Flash Flood Warning 65, NWS St. Louis, MO

June 26, 2011Washington County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 26, 2011, 4:54 PM CDT for Washington County, 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: Jun 26, 2011, 4:54 PM CDT (21:54 UTC)
Expired: Jun 26, 2011, 11:00 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Washington County, MO

The radar

The St Louis radar (KLSX), 71 km from the middle of the area, began a volume at 21:54 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 26, 8:31 PM CDT	FLASH FLOOD	Cadet, MO	WATER FLOWING ACROSS HWY E BETWEEN BLACKWELL AND CADET. ROAD IS CLOSED.

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, 9.9 hours before the alert went out and 295 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: 12 J/kg
Mixed-layer CIN: -279 J/kg
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 153 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.

085 
WGUS53 KLSX 262154
FFWLSX
MOC221-270400-
/O.NEW.KLSX.FF.W.0065.110626T2154Z-110627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
454 PM CDT SUN JUN 26 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL WASHINGTON COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 1100 PM CDT

* AT 454 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE   
  WARNED AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...  
POTOSI...MINERAL POINT AND OLD MINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.

&&

LAT...LON 3792 9081 3817 9081 3816 9074 3811 9068
      3809 9068 3809 9067 3810 9066 3809 9065
      3809 9066 3808 9064 3791 9064

$$

CARNEY

1 follow-up statement

781 
WGUS73 KLSX 270351
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1051 PM CDT SUN JUN 26 2011

MOC221-270406-
/O.EXP.KLSX.FF.W.0065.000000T0000Z-110627T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON MO-
1051 PM CDT SUN JUN 26 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EAST CENTRAL
WASHINGTON COUNTY WILL BE ALLOWED TO EXPIRE AT 1100 PM CDT...

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 3792 9081 3817 9081 3816 9074 3811 9068
      3809 9068 3809 9067 3810 9066 3809 9065
      3809 9066 3808 9064 3791 9064

$$

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:26 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	49 min
Jun 25, 7:36 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	39 min
Jun 25, 7:45 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Washington	45 min
Jun 25, 8:03 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Francois, Washington	42 min
Jun 25, 8:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	51 min
Jun 25, 8:12 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve	48 min
Jun 25, 8:13 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	47 min
Jun 25, 8:33 PM CDT	Flash Flood Warning	LSX	Lewis	6 hr
Jun 25, 8:42 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	48 min
Jun 25, 8:46 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	44 min
Jun 25, 8:52 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	38 min
Jun 25, 9:27 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	23 min
Jun 25, 10:01 PM CDT	Areal Flood Advisory	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	6 hr
Jun 25, 10:47 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	43 min
Jun 25, 11:00 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois, Washington	45 min
Jun 25, 11:08 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	22 min
Jun 25, 11:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	49 min
Jun 25, 11:35 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	40 min
Jun 25, 11:42 PM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jun 26, 12:06 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	39 min
Jun 26, 12:21 AM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	6 hr
Jun 26, 12:42 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	33 min
Jun 26, 12:43 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
Jun 26, 1:43 AM CDT	River Flood Warning	LSX	Saint Charles	13 hr
Jun 26, 2:11 AM CDT	Flash Flood Warning	LSX	Sainte Genevieve	4 hr
Jun 26, 6:29 AM CDT	Areal Flood Warning	LSX	Lincoln, Saint Charles, Saint Louis, City of Saint Louis	12 hr
Jun 26, 2:25 PM CDT	River Flood Warning	LSX	Lincoln	7 days
Jun 26, 2:25 PM CDT	River Flood Warning	LSX	Lewis	4 days
Jun 26, 2:43 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 20 more	31 hr
Jun 26, 3:11 PM CDT	River Flood Warning	LSX	Ralls	6 days
Jun 26, 4:12 PM CDT	Flash Flood Warning	LSX	Jefferson, Saint Francois	6 hr
Jun 26, 4:15 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	30 min
Jun 26, 4:16 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	29 min
Jun 26, 4:40 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	38 min

Nearby

Flash Flood Warnings in Missouri, 2011 Every flash flood warning in 2011

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.