Alert archive / Illinois / Flash Flood Watches in 2011
Flash Flood Watch 3, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood watch at May 1, 2011, 4:30 AM CDT for 8 counties in Illinois; 8 counties in Missouri. It took effect at May 1, 2011, 7:00 PM CDT. It was in force for 28 hr.
The area
The counties it named.
The facts
- Issued
- May 1, 2011, 4:30 AM CDT (09:30 UTC)
- In effect from
- May 1, 2011, 7:00 PM CDT
- Expired
- May 2, 2011, 10:55 PM CDT
- In force
- 28 hr
- Issued by
- NWS St. Louis, MO
- Flood severity
- None
Counties Bond County, IL, Clinton County, IL, Fayette County, IL, Marion County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Crawford County, MO, Iron County, MO, Jefferson County, MO, Madison County, MO, Reynolds County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 79 km from the middle of the area, began a volume at 09:28 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 00:00Z, 9.5 hours before the alert went out and 256 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
- 1530 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 218 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
612 WGUS63 KLSX 010930 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 430 AM CDT SUN MAY 1 2011 ...ANOTHER ROUND OF HEAVY RAINFALL POSSIBLE TONIGHT... .A COLD FRONT WILL STALL ACROSS THE LOWER MISSISSIPPI AND OHIO RIVER VALLEYS TODAY. RAIN AND THUNDERSTORMS WILL DEVELOP ALONG AND NORTH OF THE FRONT THIS AFTERNOON AND TONIGHT. SOME OF THE HEAVIER RAIN WILL IMPACT SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS TONIGHT. THESE ARE THE SAME AREAS WHICH RECEIVED BETWEEN 7 AND 12 INCHES OF RAIN LAST WEEK...AND ANY ADDITIONAL RAINFALL WILL ONLY WORSEN ONGOING FLOODING AND COULD CAUSE ADDITIONAL FLASH FLOODING. ILZ064-065-069-070-074-079-101-102-MOZ065-072>075-084-085-099- 012215- /O.NEW.KLSX.FF.A.0003.110502T0000Z-110502T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BOND IL-FAYETTE IL-CLINTON IL-MARION IL-WASHINGTON IL-RANDOLPH IL- ST. CLAIR IL-MONROE IL-JEFFERSON MO-CRAWFORD MO-WASHINGTON MO- ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-MADISON MO-REYNOLDS MO- INCLUDING THE CITIES OF...VANDALIA...SALEM...CHESTER... BELLEVILLE...FARMINGTON 430 AM CDT SUN MAY 1 2011 ...FLASH FLOOD WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY MORNING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF ILLINOIS AND MISSOURI... INCLUDING THE FOLLOWING COUNTIES...IN ILLINOIS...BOND IL... CLINTON IL...FAYETTE IL...MARION IL...MONROE IL...RANDOLPH IL...ST. CLAIR IL AND WASHINGTON IL. IN MISSOURI...CRAWFORD MO...IRON MO...JEFFERSON MO...MADISON MO...REYNOLDS MO...ST. FRANCOIS MO...STE. GENEVIEVE MO AND WASHINGTON MO. * FROM THIS EVENING THROUGH MONDAY MORNING * RAINFALL BETWEEN 0.5 AND 1.5 INCHES IS LIKELY THROUGH TONIGHT. LOCALLY HIGHER AMOUNTS ARE POSSIBLE. * RAINFALL ON ALREADY SATURATED GROUND WILL RUN OFF AND QUICKLY CAUSE FLASH FLOODING. ADDITIONALLY...ANY RAINFALL THAT OCCURS WILL EXTEND AND OR WORSEN ONGOING FLOODING ACROSS THE AREA. 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. && $$ CARNEY
4 follow-up statements
139 WGUS63 KLSX 012015 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 315 PM CDT SUN MAY 1 2011 ...ANOTHER ROUND OF HEAVY RAINFALL POSSIBLE TONIGHT THROUGH MONDAY... .A COLD FRONT WILL REMAIN STALLED ACROSS THE LOWER MISSISSIPPI AND OHIO RIVER VALLEYS THROUGH TOMORROW. RAIN AND THUNDERSTORMS HAVE DEVELOPED ALONG AND NORTH OF THE FRONT THIS AFTERNOON AND WILL CONTINUE THROUGH MONDAY. SOME OF THE HEAVIER RAIN WILL IMPACT SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS THROUGH MONDAY. THESE ARE THE SAME AREAS WHICH RECEIVED BETWEEN 7 AND 12 INCHES OF RAIN LAST WEEK...AND ANY ADDITIONAL RAINFALL WILL ONLY WORSEN ONGOING FLOODING AND COULD CAUSE ADDITIONAL FLASH FLOODING. ILZ064-065-069-070-101-102-MOZ065-012115- /O.CAN.KLSX.FF.A.0003.110502T0000Z-110502T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BOND IL-FAYETTE IL-CLINTON IL-MARION IL-ST. CLAIR IL-MONROE IL- JEFFERSON MO- INCLUDING THE CITIES OF...VANDALIA...SALEM...BELLEVILLE 315 PM CDT SUN MAY 1 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF ILLINOIS AND EAST CENTRAL MISSOURI HAS BEEN CANCELLED. THE THREAT OF HEAVY CONVECTIVE RAINFALL WILL BE FURTHER TO THE SOUTH...THEREFORE THE FLASH FLOOD WATCH IS CANCELLED. $$ ILZ074-079-MOZ072>075-084-085-099-021000- /O.EXT.KLSX.FF.A.0003.110502T0000Z-110503T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON IL-RANDOLPH IL-CRAWFORD MO-WASHINGTON MO- ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO-MADISON MO-REYNOLDS MO- INCLUDING THE CITIES OF...CHESTER...FARMINGTON 315 PM CDT SUN MAY 1 2011 ...FLASH FLOOD WATCH NOW IN EFFECT FROM 7 PM CDT THIS EVENING THROUGH MONDAY EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF ILLINOIS AND MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN ILLINOIS...RANDOLPH IL AND WASHINGTON IL. IN MISSOURI...CRAWFORD MO...IRON MO...MADISON MO...REYNOLDS MO... ST. FRANCOIS MO...STE. GENEVIEVE MO AND WASHINGTON MO. * FROM 7 PM CDT THIS EVENING THROUGH MONDAY EVENING * RAINFALL BETWEEN HALF AN INCH AND ONE AND A HALF INCHES IS LIKELY THROUGH MONDAY. LOCALLY HIGHER AMOUNTS ARE POSSIBLE. * RAINFALL ON ALREADY SATURATED GROUND WILL RUN OFF AND QUICKLY CAUSE FLASH FLOODING. ADDITIONALLY...ANY RAINFALL THAT OCCURS WILL EXTEND AND OR WORSEN ONGOING FLOODING ACROSS THE AREA. 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. && $$ BYRD
174 WGUS63 KLSX 020910 FFALSX FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 410 AM CDT MON MAY 2 2011 ...THREAT FOR HEAVY RAIN AND FLASH FLOODING CONTINUES TODAY... SHOWERS AND THUNDERSTORMS ARE LIKELY AGAIN TODAY...PRIMARILY IN THE AFTERNOON...ACROSS PARTS OF SOUTHEAST MISSOURI AND SOUTHERN ILLINOIS. THE GROUND IS ALREADY SATURATED...AND ANY ADDITIONAL RAINFALL WILL RUNOFF IMMEDIATELY. MOZ072-073-021015- /O.CAN.KLSX.FF.A.0003.000000T0000Z-110503T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CRAWFORD MO-WASHINGTON MO- 410 AM CDT MON MAY 2 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR A PORTION OF EAST CENTRAL MISSOURI HAS BEEN CANCELLED. THE THREAT FOR HEAVY RAIN HAS SHIFTED TO THE SOUTHEAST AWAY FROM CRAWFORD AND WASHINGTON COUNTIES TODAY. THEREFORE THE FLASH FLOOD WATCH HAS BEEN CANCELLED. $$ ILZ074-079-MOZ074-075-084-085-099-030000- /O.CON.KLSX.FF.A.0003.000000T0000Z-110503T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON IL-RANDOLPH IL-ST. FRANCOIS MO-STE. GENEVIEVE MO- IRON MO-MADISON MO-REYNOLDS MO- INCLUDING THE CITIES OF...CHESTER...FARMINGTON 410 AM CDT MON MAY 2 2011 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF ILLINOIS AND SOUTHEAST MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN ILLINOIS...RANDOLPH IL AND WASHINGTON IL. IN SOUTHEAST MISSOURI...IRON MO...MADISON MO...REYNOLDS MO...ST. FRANCOIS MO AND STE. GENEVIEVE MO. * UNTIL 700 PM CDT * RAINFALL BETWEEN ONE HALF AND ONE INCH WILL BE POSSIBLE ACROSS THE WATCH AREA TODAY...PRIMARILY IN THE AFTERNOON. * RAINFALL ON ALREADY SATURATED GROUND WILL RUN OFF AND QUICKLY CAUSE FLASH FLOODING. ADDITIONALLY...ANY RAINFALL THAT OCCURS WILL EXTEND AND OR WORSEN ONGOING FLOODING ACROSS THE AREA. 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. && $$ CARNEY
028 WGUS63 KLSX 022047 FFALSX URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 347 PM CDT MON MAY 2 2011 ...THREAT FOR HEAVY RAIN AND FLASH FLOODING CONTINUES TONIGHT... SHOWERS ARE LIKELY AGAIN TONIGHT ACROSS PARTS OF SOUTHEAST MISSOURI AND SOUTHWEST ILLINOIS. THE GROUND IS ALREADY SATURATED...AND ANY ADDITIONAL RAINFALL WILL RUNOFF IMMEDIATELY. ILZ074-079-MOZ074-075-084-085-099-031000- /O.EXT.KLSX.FF.A.0003.000000T0000Z-110503T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON IL-RANDOLPH IL-ST. FRANCOIS MO-STE. GENEVIEVE MO- IRON MO-MADISON MO-REYNOLDS MO- INCLUDING THE CITIES OF...CHESTER...FARMINGTON 347 PM CDT MON MAY 2 2011 ...FLASH FLOOD WATCH NOW IN EFFECT THROUGH LATE TONIGHT... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF SOUTHWEST ILLINOIS AND SOUTHEAST MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN SOUTHWEST ILLINOIS...RANDOLPH IL AND WASHINGTON IL. IN SOUTHEAST MISSOURI...IRON MO...MADISON MO...REYNOLDS MO...ST. FRANCOIS MO AND STE. GENEVIEVE MO. * THROUGH LATE TONIGHT * RAINFALL BETWEEN ONE HALF AND ONE INCH IS EXPECTED ACROSS THE WATCH AREA TONIGHT...PRIMARILY THIS EVENING. * RAINFALL ON ALREADY SATURATED GROUND WILL RUN OFF AND QUICKLY CAUSE FLASH FLOODING. ADDITIONALLY...ANY RAINFALL THAT OCCURS WILL EXTEND AND OR WORSEN ONGOING FLOODING ACROSS THE AREA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT FLASH FLOODING IS POSSIBLE BUT NOT IMMINENT IN THE WATCH AREA. PEOPLE IN THE WATCH AREA SHOULD BE AWARE OF THE POSSIBILITY OF HEAVY RAINFALL AND FLASH FLOODING. CHECK YOUR PREPAREDNESS REQUIREMENTS...ESPECIALLY IF YOU LIVE IN FLOOD PRONE AREAS. STAY INFORMED...AND BE READY FOR QUICK ACTION IF FLOODING IS OBSERVED OR IF A FLASH FLOOD WARNING IS ISSUED. && $$ GKS
589 WGUS63 KLSX 030355 FFALSX FLOOD WATCH NATIONAL WEATHER SERVICE ST LOUIS MO 1055 PM CDT MON MAY 2 2011 ILZ074-079-MOZ074-075-084-085-099-030500- /O.CAN.KLSX.FF.A.0003.000000T0000Z-110503T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON IL-RANDOLPH IL-ST. FRANCOIS MO-STE. GENEVIEVE MO- IRON MO-MADISON MO-REYNOLDS MO- INCLUDING THE CITIES OF...CHESTER...FARMINGTON 1055 PM CDT MON MAY 2 2011 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF ILLINOIS AND SOUTHEAST MISSOURI HAS BEEN CANCELLED. ONLY LIGHT RAIN IS EXPECTED FOR THE REMAINDER OF THE NIGHT WITH ANY ADDITIONAL RAINFALL REMAINING LESS THAN A TENTH OF AN INCH. $$ TES
Nearby
Flash Flood Watches in Illinois, 2011Flash Flood Watches in Missouri, 2011Every flash flood watch 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.