Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 66, NWS St. Louis, MO

June 20, 2008Saint Charles County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 20, 2008, 12:01 PM CDT for Saint Charles County, Missouri. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 20, 2008, 12:01 PM CDT (17:01 UTC)
Expired
Jun 20, 2008, 6:00 PM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

County Saint Charles County, MO

The radar

The St Louis radar (KLSX), 19 km from the middle of the area, began a volume at 17:03 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 5.0 hours before the alert went out and 225 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-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2008-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2008-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2301 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
39 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.

000 
WGUS53 KLSX 201709
FFWLSX
MOC183-202300-
/O.NEW.KLSX.FF.W.0066.080620T1701Z-080620T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1201 PM CDT FRI JUN 20 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 600 PM CDT

* AT 1157 AM CDT...ST. CHARLES COUNTY EMERGENCY MANAGEMENT REPORTED 
  OVERTOPPING ON THE HIGHWAY C LEVEE NEAR THE MISSISSIPPI RIVER...
  WHICH WILL IMPACT AREAS IN NORTH CENTRAL ST. CHARLES COUNTY.

* GRADUAL INUNDATION CAN BE EXPECTED TO INUNDATE THE AREA WITH 
  WATER...WITH A LEVEE FAILURE POSSIBLE WITHIN 36 HOURS. THE AREA 
  AFFECTED WILL BE BOUND BETWEEN THE MISSISSIPPI RIVER TO THE NORTH
  AND SALT RIVER ROAD TO THE SOUTH AND SOUTHWEST...AND THE AREA JUST
  EAST OF HIGHWAY 79 IN THE WEST AND DARDENNE CREEK TO THE EAST. 

AGAIN...A GRADUAL INUNDATION OF WATER IS EXPECTED AT THIS TIME...BUT 
IF A LEVEE FAILURE BECOMES A REALITY...MUCH QUICKER INUNDATION WILL 
OCCUR. INCORPORATED AREAS OF ST. PETERS ARE NOT EXPECTED TO BE 
AFFECTED AT THIS TIME...BUT SILVERS ROAD AND COUNTY HIGHWAY C WILL 
FLOOD IN THE WARNED AREA...IN UNINCORPORATED ST. CHARLES COUNTY.

LAT...LON 3889 9064 3887 9061 3887 9056 3884 9057
      3880 9062 3881 9069 3888 9068 3890 9065
TIME...MOT...LOC 1701Z 180DEG 0KT 3885 9063

$$

TES
1 follow-up statement
000 
WGUS73 KLSX 202311
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
603 PM CDT FRI JUN 20 2008

MOC183-202313-
/O.EXP.KLSX.FF.W.0066.000000T0000Z-080620T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ST. CHARLES MO-
603 PM CDT FRI JUN 20 2008

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTH CENTRAL ST. CHARLES 
COUNTY...

WHILE THE FLASH FLOOD WARNING HAS EXPIRED...THE RIVER FLOOD WARNING 
REMAINS IN EFFECT UNTIL FURTHER NOTICE IN ST. CHARLES COUNTY.  FLOOD 
WATER CONTINUES TO OVERTOP THE HIGHWAY C LEVEE NEAR THE  MISSISSIPPI 
RIVER TO THE NORTH OF ST. PETERS.  A GRADUAL INUNDATION OF WATER IS 
EXPECTED TO CONTINUE BETWEEN THE MISSISSIPPI RIVER AND SALT RIVER 
ROAD BETWEEN HIGHWAY 79 AND DARDENNE CREEK.  INCORPORATED AREAS OF 
ST. PETERS ARE NOT EXPECTED TO BE AFFECTED AT THIS TIME...BUT 
SILVERS ROAD AND COUNTY HIGHWAY C WILL FLOOD IN UNINCORPORATED ST. 
CHARLES COUNTY.

LAT...LON 3889 9064 3887 9061 3887 9056 3884 9057
      3880 9062 3881 9069 3888 9068 3890 9065
TIME...MOT...LOC 1701Z 180DEG 0KT 3884 9063

$$

BRITT

Nearby

Flash Flood Warnings in Missouri, 2008Every flash flood warning in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.