Alert archive / Missouri / Flash Flood Warnings in 2012

Flash Flood Warning 14, NWS St. Louis, MO

April 14, 2012Cole County, Osage County, Missouri

NWS St. Louis, MO issued this flash flood warning at Apr 14, 2012, 7:13 AM CDT for Cole County, Osage County, Missouri. It was in force for 6 hr. 3 reports 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: Apr 14, 2012, 7:13 AM CDT (12:13 UTC)
Expired: Apr 14, 2012, 1:00 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Cole County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 127 km from the middle of the area, began a volume at 12:13 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
Apr 14, 7:16 AM CDT	FLASH FLOOD	1 E St. Martins, MO	A SMALL STREAM IS OUT OF ITS BANKS AND FLOWING SWIFTLY OVER A BRIDGE.
Apr 14, 8:49 AM CDT	HEAVY RAIN 3.25	5 Ese Linn, MO	24 HOUR RAINFALL
Apr 14, 9:30 AM CDT	FLASH FLOOD	5 Se Linn, MO	ROUTE RA HAS BEEN CLOSED DUE TO FLASH FLOODING FROM POINTERS CREEK ACCESS TO ROUTE CC.

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 12:00Z, 0.2 hours before the alert went out and 235 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: 527 J/kg
Mixed-layer CIN: -91 J/kg
Mixed-layer LCL: 847 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 371 m²/s²
0-3 km storm-relative helicity: 460 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

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

695 
WGUS53 KLSX 141213
FFWLSX
MOC051-151-141800-
/O.NEW.KLSX.FF.W.0014.120414T1213Z-120414T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
713 AM CDT SAT APR 14 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  COLE COUNTY IN CENTRAL MISSOURI...
  OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 100 PM CDT

* AT 712 AM CDT...TRAINED WEATHER SPOTTERS REPORTED SLOW MOVING  
  THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. A 
  STORM SPOTTER REPORTED FLASH FLOODING 5 MILES WEST OF JEFFERSON 
  CITY. SMALL STREAMS WERE OUT OF THEIR BANKS AND WERE FLOWING 
  SWIFTLY OVER ROADS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  JEFFERSON CITY...LINN...BRAZITO...CENTERTOWN...CHAMOIS...
  FREEBURG...HICKORY HILL...RICH FOUNTAIN...RUSSELLVILLE...ST.
  MARTINS...ST. THOMAS...TAOS...WARDSVILLE AND WESTPHALIA.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE. TURN
AROUND... DONT DROWN.

&&

LAT...LON 3874 9239 3872 9234 3868 9235 3864 9222
      3858 9217 3856 9210 3859 9195 3868 9182
      3868 9177 3871 9173 3870 9164 3829 9164
      3829 9220 3833 9220 3832 9226 3834 9241
      3842 9240 3844 9249

$$

CARNEY

1 follow-up statement

174 
WGUS73 KLSX 141800
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
100 PM CDT SAT APR 14 2012

MOC051-151-141810-
/O.EXP.KLSX.FF.W.0014.000000T0000Z-120414T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COLE MO-OSAGE MO-
100 PM CDT SAT APR 14 2012

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR OSAGE AND COLE
COUNTIES HAS BEEN ALLOWED TO EXPIRE...

THE RAIN HAS ENDED ACROSS THIS AREA EARLY THIS AFTERNOON. EXCESS 
RUNOFF FROM HEAVY RAIN HAS ALSO ENDED OVER THE WARNED AREA. STREAMS 
AND CREEKS IN THE WARNED AREA WHICH WERE RUNNING HIGH HAVE RECEDED 
OR WERE BEGINNING TO RECEDE...ENDING THE FLOOD THREAT. MOTORISTS 
WILL STILL NEED TO DRIVE WITH EXTRA CAUTION AS LOW WATER CROSSINGS 
MAY STILL HAVE SOME WATER AND DEBRIS LEFT ON THEM OR HAVE BEEN 
DAMAGED DUE TO RECENT FLOODING. IF FLOODING HAS BEEN 
OBSERVED...PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3874 9239 3872 9234 3868 9235 3864 9222
      3858 9217 3856 9210 3859 9195 3868 9182
      3868 9177 3871 9173 3870 9164 3829 9164
      3829 9220 3833 9220 3832 9226 3834 9241
      3842 9240 3844 9249

$$

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 9:19 PM CDT	Flash Flood Watch	LSX	Boone, Callaway, Cole, Crawford, Franklin, Gasconade and 10 more	13 hr
Apr 14, 1:26 AM CDT	River Flood Warning	LSX	Cole	3 days
Apr 14, 1:53 AM CDT	Areal Flood Advisory	LSX	Saint Louis, City of Saint Louis	4 hr
Apr 14, 6:27 AM CDT	Areal Flood Advisory	LSX	Cole, Osage	4 hr
Apr 14, 7:06 AM CDT	River Flood Warning	LSX	Osage	24 hr
Apr 14, 7:38 AM CDT	Areal Flood Advisory	LSX	Gasconade	4 hr
Apr 14, 11:14 AM CDT	River Flood Warning	LSX	Saint Charles	20 hr
Apr 14, 3:30 PM CDT	River Flood Warning	LSX	Lincoln	16 hr

Nearby

Flash Flood Warnings in Missouri, 2012 Every flash flood warning in 2012

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.