Alert archive / Missouri / Flash Flood Watches in 2012
Flash Flood Watch 3, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at Apr 29, 2012, 4:00 PM CDT for 14 counties in Illinois; 20 counties in Missouri. It took effect at Apr 29, 2012, 10:00 PM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 2012, 4:00 PM CDT (21:00 UTC)
- In effect from
- Apr 29, 2012, 10:00 PM CDT
- Expired
- Apr 30, 2012, 7:08 AM CDT
- In force
- 9 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
All 34 counties
Bond County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Jefferson County, MO, Lincoln County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Saint Charles County, MO, Saint Louis County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 14 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 237 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
- 1 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 414 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 135 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
973 WGUS63 KLSX 292100 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 400 PM CDT SUN APR 29 2012 MOZ034>036-041-042-047>052-059-060-300900- /O.NEW.KLSX.FF.A.0003.120430T0300Z-120430T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MONROE MO-RALLS MO-PIKE MO-BOONE MO-AUDRAIN MO-MONITEAU MO- COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-LINCOLN MO- GASCONADE MO-WARREN MO- INCLUDING THE CITIES OF...BOWLING GREEN...COLUMBIA...MEXICO... JEFFERSON CITY 400 PM CDT SUN APR 29 2012 ...FLASH FLOOD WATCH IN EFFECT FROM 10 PM CDT THIS EVENING THROUGH MONDAY MORNING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL MISSOURI...EAST CENTRAL MISSOURI AND NORTHEAST MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN CENTRAL MISSOURI...AUDRAIN MO...BOONE MO...CALLAWAY MO...COLE MO...MONITEAU MO AND OSAGE MO. IN EAST CENTRAL MISSOURI...GASCONADE MO...LINCOLN MO... MONTGOMERY MO AND WARREN MO. IN NORTHEAST MISSOURI...MONROE MO...PIKE MO AND RALLS MO. * FROM 10 PM CDT THIS EVENING THROUGH MONDAY MORNING * THUNDERSTORMS CONTAINING HEAVY RAIN WILL DEVELOP AND EXPAND OVER MUCH OF CENTRAL AND PARTS OF NORTHEAST MISSOURI BY LATER THIS EVENING AND CONTINUE OVERNIGHT AND INTO EARLY MONDAY MORNING BEFORE DIMINISHING OR MOVING TO THE EAST OF THE AREA. RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE...AND IF RECEIVED IN A SHORT ENOUGH TIME SPAN COULD LEAD TO FLASH FLOODING ON AREA CREEKS AND STREAMS SINCE MANY OF THESE SAME AREAS RECEIVED AN INCH OR SO OF RAINFALL THE PREVIOUS MORNING LEADING TO WET TO SATURATED GROUNDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT IMMINENT IN THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE AWARE OF THE POSSIBILITY OF HEAVY RAINFALL AND FLASH FLOODING. CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU LIVE IN FLOOD PRONE AREAS. STAY INFORMED...AND BE READY FOR QUICK ACTION IF FLOODING IS OBSERVED OR IF A FLASH FLOOD WARNING IS ISSUED. && $$ TES
2 follow-up statements
985 WGUS63 KLSX 300641 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 141 AM CDT MON APR 30 2012 ILZ058>060-064-065-069-070-074-098>102-MOZ061>065-072-073-301700- /O.EXB.KLSX.FF.A.0003.000000T0000Z-120430T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-CALHOUN IL-JERSEY IL-MADISON IL- ST. CLAIR IL-MONROE IL-ST. CHARLES MO-FRANKLIN MO-ST. LOUIS MO- ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... EDWARDSVILLE...BELLEVILLE...ST CHARLES...UNION...ST LOUIS 141 AM CDT MON APR 30 2012 ...FLASH FLOOD WATCH IN EFFECT UNTIL NOON CDT TODAY... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE PORTIONS OF ILLINOIS AND EAST CENTRAL MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN ILLINOIS...BOND IL...CALHOUN IL...CLINTON IL...FAYETTE IL... GREENE IL...JERSEY IL...MACOUPIN IL...MADISON IL...MARION IL...MONROE IL...MONTGOMERY IL...ST. CLAIR IL AND WASHINGTON IL. IN EAST CENTRAL MISSOURI...CRAWFORD MO...FRANKLIN MO... JEFFERSON MO...ST. CHARLES MO...ST. LOUIS CITY MO...ST. LOUIS MO AND WASHINGTON MO. * UNTIL NOON CDT TODAY * THUNDERSTORMS CONTAINING HEAVY RAIN WILL CONTINUE TO EXPAND OVER MUCH OF EASTERN AND SOUTHEAST MISSOURI AS WELL AS SOUTHWEST ILLINOIS INTO EARLY MONDAY MORNING. THESE THUNDERSTORMS ARE EXPECTED TO THEN DIMINISH OR MOVE TO THE EAST OF THE AREA BY NOON. RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE...AND IF RECEIVED IN A SHORT ENOUGH TIME SPAN COULD LEAD TO FLASH FLOODING ON AREA CREEKS AND STREAMS SINCE MANY OF THESE SAME AREAS RECEIVED AN INCH OR SO OF RAINFALL THE PREVIOUS MORNING LEADING TO WET TO SATURATED GROUNDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT IMMINENT IN THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE AWARE OF THE POSSIBILITY OF HEAVY RAINFALL AND FLASH FLOODING. CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU LIVE IN FLOOD PRONE AREAS. STAY INFORMED...AND BE READY FOR QUICK ACTION IF FLOODING IS OBSERVED OR IF A FLASH FLOOD WARNING IS ISSUED. && $$ ILZ097-301500- /O.EXA.KLSX.FF.A.0003.000000T0000Z-120430T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIKE IL- 141 AM CDT MON APR 30 2012 ...FLASH FLOOD WATCH IN EFFECT UNTIL 10 AM CDT THIS MORNING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS EXPANDED THE * FLASH FLOOD WATCH TO INCLUDE A PORTION OF WEST CENTRAL ILLINOIS...INCLUDING THE FOLLOWING COUNTY...PIKE IL. * UNTIL 10 AM CDT THIS MORNING * THUNDERSTORMS CONTAINING HEAVY RAIN WILL CONTINUE TO DEVELOP AND EXPAND INTO PORTIONS OF WEST CENTRAL ILLINOIS INTO EARLY MONDAY MORNING BEFORE DIMINISHING OR MOVING TO THE EAST OF THE AREA BY MID MORNING. RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE... AND IF RECEIVED IN A SHORT ENOUGH TIME SPAN COULD LEAD TO FLASH FLOODING ON AREA CREEKS AND STREAMS SINCE MANY OF THESE SAME AREAS RECEIVED AN INCH OR SO OF RAINFALL THE PREVIOUS MORNING LEADING TO WET TO SATURATED GROUNDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT IMMINENT IN THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE AWARE OF THE POSSIBILITY OF HEAVY RAINFALL AND FLASH FLOODING. CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU LIVE IN FLOOD PRONE AREAS. STAY INFORMED...AND BE READY FOR QUICK ACTION IF FLOODING IS OBSERVED OR IF A FLASH FLOOD WARNING IS ISSUED. && $$ MOZ034>036-041-042-047>052-059-060-301500- /O.CON.KLSX.FF.A.0003.000000T0000Z-120430T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MONROE MO-RALLS MO-PIKE MO-BOONE MO-AUDRAIN MO-MONITEAU MO- COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-LINCOLN MO- GASCONADE MO-WARREN MO- INCLUDING THE CITIES OF...BOWLING GREEN...COLUMBIA...MEXICO... JEFFERSON CITY 141 AM CDT MON APR 30 2012 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF CENTRAL MISSOURI...EAST CENTRAL MISSOURI AND NORTHEAST MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN CENTRAL MISSOURI...AUDRAIN MO...BOONE MO...CALLAWAY MO...COLE MO...MONITEAU MO AND OSAGE MO. IN EAST CENTRAL MISSOURI... GASCONADE MO...LINCOLN MO...MONTGOMERY MO AND WARREN MO. IN NORTHEAST MISSOURI...MONROE MO...PIKE MO AND RALLS MO. * UNTIL 10 AM CDT THIS MORNING * THUNDERSTORMS CONTAINING HEAVY RAIN WILL CONTINUE TO DEVELOP AND EXPAND OVER MUCH OF CENTRAL AND NORTHEAST MISSOURI INTO EARLY MONDAY MORNING BEFORE DIMINISHING OR MOVING TO THE EAST OF THE AREA BY MID MORNING. RAINFALL AMOUNTS OF 1 TO 3 INCHES ARE POSSIBLE...AND IF RECEIVED IN A SHORT ENOUGH TIME SPAN COULD LEAD TO FLASH FLOODING ON AREA CREEKS AND STREAMS SINCE MANY OF THESE SAME AREAS RECEIVED AN INCH OR SO OF RAINFALL THE PREVIOUS MORNING LEADING TO WET TO SATURATED GROUNDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT IMMINENT IN THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE AWARE OF THE POSSIBILITY OF HEAVY RAINFALL AND FLASH FLOODING. CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU LIVE IN FLOOD PRONE AREAS. STAY INFORMED...AND BE READY FOR QUICK ACTION IF FLOODING IS OBSERVED OR IF A FLASH FLOOD WARNING IS ISSUED. && $$ TILLY
756 WGUS63 KLSX 301208 FFALSX FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 708 AM CDT MON APR 30 2012 ILZ058>060-064-065-069-070-074-098>102-MOZ061>065-072-073-301315- /O.CAN.KLSX.FF.A.0003.000000T0000Z-120430T1700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-CALHOUN IL-JERSEY IL-MADISON IL- ST. CLAIR IL-MONROE IL-ST. CHARLES MO-FRANKLIN MO-ST. LOUIS MO- ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO- INCLUDING THE CITIES OF...LITCHFIELD...VANDALIA...SALEM... EDWARDSVILLE...BELLEVILLE...ST CHARLES...UNION...ST LOUIS 708 AM CDT MON APR 30 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF ILLINOIS AND EAST CENTRAL MISSOURI HAS BEEN CANCELLED. THUNDERSTORMS OVERNIGHT BROUGHT AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL TO THE AREA WHICH CAUSED FLASH FLOODING IN SOME AREAS. SINCE THEN...THE HEAVY RAIN THREAT HAS COME TO AN END. $$ ILZ097-MOZ034>036-041-042-047>052-059-060-301315- /O.CAN.KLSX.FF.A.0003.000000T0000Z-120430T1500Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ PIKE IL-MONROE MO-RALLS MO-PIKE MO-BOONE MO-AUDRAIN MO- MONITEAU MO-COLE MO-OSAGE MO-CALLAWAY MO-MONTGOMERY MO-LINCOLN MO- GASCONADE MO-WARREN MO- INCLUDING THE CITIES OF...BOWLING GREEN...COLUMBIA...MEXICO... JEFFERSON CITY 708 AM CDT MON APR 30 2012 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF WEST CENTRAL ILLINOIS AND MISSOURI HAS BEEN CANCELLED. THUNDERSTORMS OVERNIGHT BROUGHT AN ADDITIONAL 2 TO 3 INCHES OF RAINFALL TO THE AREA WHICH CAUSED FLASH FLOODING IN SOME AREAS. SINCE THEN...THE HEAVY RAIN THREAT HAS COME TO AN END. $$ TILLY
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 7:41 PM CDT | Areal Flood Advisory | LSX | Clinton, Saint Clair, Washington | 6 hr |
| Apr 28, 8:12 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 48 min |
| Apr 28, 8:39 PM CDT | Severe Thunderstorm Warning | LSX | Monroe | 36 min |
| Apr 28, 9:05 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 33 min |
| Apr 28, 9:31 PM CDT | Severe Thunderstorm Warning | LSX | Randolph, Saint Clair, Washington | 33 min |
| Apr 28, 10:01 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Macoupin, Madison, Montgomery | 34 min |
| Apr 28, 10:25 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 28 min |
| Apr 29, 1:44 AM CDT | Severe Thunderstorm Warning | LSX | Madison | 46 min |
| Apr 29, 4:59 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 46 min |
| Apr 29, 5:32 AM CDT | Severe Thunderstorm Warning | LSX | Greene, Jersey | 36 min |
| Apr 29, 7:54 AM CDT | Flash Flood Warning | LSX | Macoupin, Montgomery | 6 hr |
| Apr 29, 7:58 AM CDT | Severe Thunderstorm Warning | LSX | Montgomery | 20 min |
| Apr 29, 1:47 AM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole | 32 min |
| Apr 29, 2:22 AM CDT | Severe Thunderstorm Warning | LSX | Audrain, Boone | 38 min |
| Apr 29, 2:52 AM CDT | Severe Thunderstorm Warning | LSX | Monroe | 38 min |
| Apr 29, 3:05 AM CDT | Severe Thunderstorm Warning | LSX | Callaway | 44 min |
| Apr 29, 4:00 AM CDT | Severe Thunderstorm Warning | LSX | Lincoln, Montgomery, Pike | 27 min |
Nearby
Flash Flood Watches in Missouri, 2012Flash Flood Watches in Illinois, 2012Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.