Alert archive / Missouri / Flash Flood Warnings in 2009

Flash Flood Warning 34, NWS St. Louis, MO

June 8, 2009Reynolds County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 8, 2009, 7:10 PM CDT for Reynolds County, Missouri. It was in force for 5 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 8, 2009, 7:10 PM CDT (00:10 UTC)
Expired: Jun 9, 2009, 12:00 AM CDT
In force: 5 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Reynolds County, MO

The radar

The St Louis radar (KLSX), 135 km from the middle of the area, began a volume at 00:10 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 8, 7:42 PM CDT	FLASH FLOOD	Lesterville, MO	ALL THE DITCHES IN TOWN ARE OVERFLOWING...ABOUT AN INCH OF WATER RUNNING OVER ROADS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 0.2 hours before the alert went out and 255 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: 3121 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 771 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 152 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 090010
FFWLSX
MOC179-090500-
/O.NEW.KLSX.FF.W.0034.090609T0010Z-090609T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
710 PM CDT MON JUN 8 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN REYNOLDS COUNTY IN SOUTHEAST MISSOURI

* UNTIL MIDNIGHT CDT

* AT 708 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE  
  WARNED AREA. THESE THUNDERSTORMS HAVE PRODUCED UP TO 2 INCHES OF 
  RAINFALL. AN ADDITIONAL 1 TO 2 INCHES WILL BE POSSIBLE OVER THE 
  WARNED AREA AS THESE THUNDERSTORMS MOVE SLOWLY TO THE SOUTHEAST. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...  
  OATES...LESTERVILLE AND CENTERVILLE.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.

&&

LAT...LON 3741 9118 3759 9117 3759 9110 3760 9103
      3760 9078 3740 9078

$$

TILLY

1 follow-up statement

000 
WGUS73 KLSX 090217
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
917 PM CDT MON JUN 8 2009

MOC179-090500-
/O.CON.KLSX.FF.W.0034.000000T0000Z-090609T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
REYNOLDS MO-
917 PM CDT MON JUN 8 2009

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN REYNOLDS COUNTY
UNTIL MIDNIGHT CDT...

AT 914 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 
DOPPLER RADAR ESTIMATED AMOUNTS OF 2 INCHES WHERE POSSIBLE ACROSS 
THE WARNED AREA. THUNDERSTORMS WILL REMAIN POSSIBLE THIS EVENING AND 
OVERNIGHT. HOWEVER...NO SIGNIFICANT RAINFALL IS EXPECTED AT THE 
MOMENT. 

SLOW MOVING THUNDERSTORMS ARE PRODUCING VERY HEAVY RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING 
INCLUDE...OATES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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.

IN HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH
ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL
ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW
INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS.

&&

LAT...LON 3741 9118 3759 9117 3759 9110 3760 9103
      3760 9078 3740 9078

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 7:07 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	38 min
Jun 8, 7:17 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	13 min
Jun 8, 7:27 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds	48 min
Jun 8, 7:42 PM CDT	Tornado Warning	LSX	Iron, Reynolds	33 min
Jun 8, 8:19 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	26 min
Jun 8, 8:47 PM CDT	Flash Flood Warning	LSX	Iron, Reynolds	6 hr
Jun 9, 12:01 AM CDT	Areal Flood Warning	LSX	Reynolds	6 hr
Jun 9, 3:05 AM CDT	Areal Flood Warning	LSX	Reynolds	3 hr
Jun 9, 3:23 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	52 min
Jun 9, 3:34 PM CDT	Tornado Warning	LSX	Reynolds	56 min
Jun 9, 4:00 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 16 more	12 hr
Jun 9, 4:21 PM CDT	Tornado Warning	LSX	Iron, Reynolds	54 min
Jun 9, 5:02 PM CDT	Flash Flood Warning	LSX	Reynolds	7 hr
Jun 9, 6:46 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison	29 min

Nearby

Flash Flood Warnings in Missouri, 2009 Every flash flood warning in 2009

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.