Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 20, NWS St. Louis, MO

April 3, 2008Iron County, Madison County, Reynolds County, Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 3, 2008, 10:25 PM CDT for Iron County, Madison County, Reynolds County, Missouri. It was in force for 4 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
Apr 3, 2008, 10:25 PM CDT (03:25 UTC)
Expired
Apr 4, 2008, 2:30 AM CDT
In force
4 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Iron County, MO, Madison County, MO, Reynolds County, MO

The radar

The St Louis radar (KLSX), 149 km from the middle of the area, began a volume at 03:26 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

Springfield, MO (KSGF), launched 00:00Z, 3.4 hours before the alert went out and 262 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, Springfield, MO at 00:00Z on 2008-04-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 525 joules per kilogram.LCLLFCEL10008507005003002001001 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, Springfield, MO at 00:00Z on 2008-04-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 135 square meters per square second.1939587897117Sfc1 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
525 J/kg
Mixed-layer CIN
-16 J/kg
Mixed-layer LCL
633 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
135 m²/s²
0-3 km storm-relative helicity
224 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 040328
FFWLSX
MOC093-123-179-040730-
/O.NEW.KLSX.FF.W.0020.080404T0325Z-080404T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1025 PM CDT THU APR 3 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  IRON COUNTY IN SOUTHEAST MISSOURI
  MADISON COUNTY IN SOUTHEAST MISSOURI
  REYNOLDS COUNTY IN SOUTHEAST MISSOURI

* UNTIL 230 AM CDT

* AT 1021 PM CDT...ANOTHER AREA OF THUNDERSTORMS PRODUCING VERY
  HEAVY RAIN HAS MOVED BACK INTO THE WARNED AREA. THE
  THUNDERSTORMS WILL PRODUCE BRIEF...YET INTENSE RAINFALL RATES
  AROUND AN INCH AN HOUR OVER GROUND THAT IS SATURATED...CAUSING
  IMMEDIATE RUN OFF THAT WILL LIKELY PRODUCE FLASH FLOODING.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING VIBURNUM...SACO...ROSELLE...REYNOLDS...PILOT KNOB...
  OATES...MARQUAND...JUNCTION CITY...IRONTON...GLOVER...
  FREDERICKTOWN...BUNKER...BIXBY...BELLEVIEW...ARCADIA AND ANNAPOLIS.

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

LAT...LON 3705 9097 3710 9103 3716 9105 3716 9110
      3728 9118 3749 9123 3750 9131 3755 9134
      3758 9133 3758 9117 3773 9115 3774 9067
      3763 9067 3764 9014 3731 9015 3731 9054
      3727 9055 3727 9073 3704 9079
TIME...MOT...LOC 0325Z 180DEG 0KT 3735 9099

$$

BYRD
1 follow-up statement
000 
WGUS73 KLSX 040732
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
225 AM CDT FRI APR 4 2008

MOC093-123-179-040735-
/O.EXP.KLSX.FF.W.0020.000000T0000Z-080404T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
REYNOLDS MO-MADISON MO-IRON MO-
225 AM CDT FRI APR 4 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 230 AM CDT FOR IRON...
MADISON AND REYNOLDS COUNTIES...

THE SHOWERS AND THUNDERSTORMS WHICH PRODUCED THE HEAVY RAINS EARLIER 
HAVE MOVED OUT OF THE WARNED AREA. A CHECK WITH AREA LAW ENFORCEMENT 
INDICATES THAT FLOODING IS NO LONGER A PROBLEM IN THE AREA.

MOTORISTS SHOULD USE CAUTION WHEN APPROACHING AREAS THAT EXPERIENCED
HIGH WATER LEVELS...AS THE FAST FLOWING WATER MAY HAVE DAMAGED 
ROADWAYS AND BRIDGES.  ALTHOUGH THE HIGH WATER IS RECEEDING 
MOTORISTS SHOULD STILL TAKE IT SLOW AND BE EXTRA CAUTIOUS 
APPROACHING ANY LOW WATER CROSSINGS OR LOW LYING AREAS NEAR STREAMS 
AND CREEKS. 

LAT...LON 3705 9097 3710 9103 3716 9105 3716 9110
      3728 9118 3749 9123 3750 9131 3755 9134
      3758 9133 3758 9117 3773 9115 3774 9067
      3763 9067 3764 9014 3731 9015 3731 9054
      3727 9055 3727 9073 3704 9079
TIME...MOT...LOC 0725Z 180DEG 0KT 3735 9099

$$

GKS

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.