Alert archive / Missouri / Flash Flood Warnings in 2011
Flash Flood Warning 2, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 9, 2011, 1:42 AM CDT for Marion County, Shelby 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
- Apr 9, 2011, 1:42 AM CDT (06:42 UTC)
- Expired
- Apr 9, 2011, 7:30 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Marion County, MO, Shelby County, MO
The radar
The St Louis radar (KLSX), 173 km from the middle of the area, began a volume at 06:44 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
Davenport, (KDVN), launched 00:00Z, 6.7 hours before the alert went out and 232 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 551 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 170 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
754
WGUS53 KLSX 090642
FFWLSX
MOC127-205-091230-
/O.NEW.KLSX.FF.W.0002.110409T0642Z-110409T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
142 AM CDT SAT APR 9 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SHELBY COUNTY IN NORTHEAST MISSOURI...
WESTERN MARION COUNTY IN NORTHEAST MISSOURI...
* UNTIL 730 AM CDT
* AT 141 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. OVER ONE INCH OF RAINFALL HAS ALREADY FALLEN WITHIN
THE PAST HOUR...WITH ANOTHER ONE TO TWO INCHES POSSIBLE.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CLARENCE...EMDEN...PHILADELPHIA...SHELBYVILLE AND WARREN.
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.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 3995 9172 3972 9171 3970 9230 3994 9229
3995 9229
$$
TILLY2 follow-up statements
606
WGUS73 KLSX 091029
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
529 AM CDT SAT APR 9 2011
MOC127-205-091230-
/O.CON.KLSX.FF.W.0002.000000T0000Z-110409T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MO-SHELBY MO-
529 AM CDT SAT APR 9 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SHELBY AND WESTERN
MARION COUNTIES UNTIL 730 AM CDT...
AT 523 AM CDT...RUNOFF FROM THUNDERSTORMS DURING THE OVERNIGHT HOURS
WILL CONTINUE PRODUCE FLASH FLOODING.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CLARENCE...
EMDEN...PHILADELPHIA...SHELBYVILLE AND WARREN.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS.
&&
LAT...LON 3995 9172 3972 9171 3970 9230 3994 9229
3995 9229
$$
MILLER818
WGUS73 KLSX 091239
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
739 AM CDT SAT APR 9 2011
MOC127-205-091254-
/O.EXP.KLSX.FF.W.0002.000000T0000Z-110409T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARION MO-SHELBY MO-
739 AM CDT SAT APR 9 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SHELBY AND WESTERN
MARION COUNTIES HAS BEEN ALLOWED TO EXPIRE...
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 3995 9172 3972 9171 3970 9230 3994 9229
3995 9229
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 2:46 AM CDT | Flash Flood Warning | LSX | Marion | 6 hr |
| Apr 9, 3:00 AM CDT | Severe Thunderstorm Warning | LSX | Marion, Ralls | 33 min |
| Apr 9, 3:44 AM CDT | Severe Thunderstorm Warning | LSX | Pike | 31 min |
| Apr 9, 5:04 AM CDT | Severe Thunderstorm Warning | LSX | Iron, Madison, Reynolds, Saint Francois | 41 min |
| Apr 9, 5:08 AM CDT | Severe Thunderstorm Warning | LSX | Saint Charles, Saint Louis | 22 min |
| Apr 9, 5:44 AM CDT | Areal Flood Advisory | LSX | Lincoln, Saint Charles, Saint Louis, City of Saint Louis | 3 hr |
| Apr 9, 10:42 AM CDT | River Flood Warning | LSX | Marion | 32 days |
Nearby
Flash Flood Warnings in Missouri, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.