Alert archive / Illinois / Flash Flood Warnings in 2011
Flash Flood Warning 5, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Apr 22, 2011, 7:28 AM CDT for 4 counties in Illinois; 4 counties in 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 22, 2011, 7:28 AM CDT (12:28 UTC)
- Expired
- Apr 22, 2011, 1:30 PM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Jefferson 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 12:28 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 12:00Z, 0.5 hours before the alert went out and 290 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
- 845 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 585 m²/s²
- 0-3 km storm-relative helicity
- 683 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
230 WGUS53 KLSX 221228 FFWLSX ILC133-157-163-189-MOC099-186-187-221-221830- /O.NEW.KLSX.FF.W.0005.110422T1228Z-110422T1830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 728 AM CDT FRI APR 22 2011 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS... NORTHERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI... SOUTHEASTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS... SOUTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI... SOUTHERN MONROE COUNTY IN SOUTHWEST ILLINOIS... SOUTHWESTERN WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS... ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI... WASHINGTON COUNTY IN EAST CENTRAL MISSOURI... * UNTIL 130 PM CDT FRIDAY * AT 727 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR ESTIMATES THAT 2 TO 4 INCHES OF RAIN HAS ALREADY FALLEN OVER THE WARNED AREA. ADDITIONAL THUNDERSTORMS WITH HEAVY RAINFALL WILL LEAD TO FLASH FLOODING. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...BONNE TERRE...DE SOTO...POTOSI...RED BUD...SPARTA...BALDWIN... BLOOMSDALE...COULTERVILLE...COURTOIS...EVANSVILLE...LIVELY GROVE... MARISSA...MINERAL POINT...NEW ATHENS...NEW DESIGN...OLD MINES... OLYMPIAN VILLAGE AND TILDEN. 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. && LAT...LON 3775 9111 3801 9110 3843 8960 3808 8960 $$ CVKING
1 follow-up statement
307 WGUS73 KLSX 221750 FFSLSX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 1250 PM CDT FRI APR 22 2011 MOC099-186-187-221-221757- /O.CAN.KLSX.FF.W.0005.000000T0000Z-110422T1830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ ST. FRANCOIS MO-STE. GENEVIEVE MO-WASHINGTON MO-JEFFERSON MO- 1250 PM CDT FRI APR 22 2011 ...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN JEFFERSON...WASHINGTON...NORTHERN STE. GENEVIEVE AND ST. FRANCOIS COUNTIES IS CANCELLED... EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO RECEDE...AND LAW ENFORCEMENT THROUGHOUT SOUTHEAST MISSOURI HAVE NOT RECEIVED ANY REPORTS OF FLOODING OR CLOSED ROADS. HOWEVER...A FLASH FLOOD WATCH REMAINS IN EFFECT AS ANOTHER ROUND OF INTENSE THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND EARLY THIS EVENING. THESE STORMS COULD POSE ANOTHER DANGER OF FLASH FLOODING...SO PEOPLE THROUGHOUT THE AREA ARE URGED TO MONITOR WEATHER DEVELOPMENTS INTO THE EARLY EVENING HOURS. LAT...LON 3799 9003 3821 9036 3843 8960 3808 8960 $$ ILC133-157-163-189-221830- /O.CON.KLSX.FF.W.0005.000000T0000Z-110422T1830Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ RANDOLPH IL-WASHINGTON IL-MONROE IL-ST. CLAIR IL- 1250 PM CDT FRI APR 22 2011 ...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHEASTERN ST. CLAIR...SOUTHERN MONROE...SOUTHWESTERN WASHINGTON AND NORTHERN RANDOLPH COUNTIES UNTIL 130 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT SCATTERED THUNDERSTORMS WITH BRIEF HEAVY DOWNPOURS HAVE MOVED FROM RED BUD TO JUST EAST OF MARISSA SINCE 12 NOON....BUT ARE GETTING READY TO EXIT THE WARNING AREA...PRODUCING SPOTTY RAINS OF AROUND ONE-HALF INCH. HOWEVER...SOUTH OF A RED BUD....MARISSA LINE...NO HEAVY RAIN HAS BEEN REPORTED SINCE AROUND 8 AM. IF CURRENT TRENDS CONTINUE...THE THREAT OF FLASH FLOODING WILL TEMPORARILY SUBSIDE EARLY THIS AFTERNOON. HOWEVER...A FLASH FLOOD WATCH REMAINS IN EFFECT AS ANOTHER ROUND OF INTENSE THUNDERSTORMS ARE EXPECTED LATE THIS AFTERNOON AND EARLY THIS EVENING. THESE STORMS COULD POSE ANOTHER DANGER OF FLASH FLOODING...SO PEOPLE THROUGHOUT THE AREA ARE URGED TO MONITOR WEATHER DEVELOPMENTS INTO THE EARLY EVENING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WARNING MEANS THAT FLASH 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. && LAT...LON 3799 9003 3821 9036 3843 8960 3808 8960 $$ TRUETT
The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:12 AM CDT | Areal Flood Advisory | LSX | Randolph | 3 hr |
| Apr 22, 7:17 AM CDT | Areal Flood Advisory | LSX | Monroe | 3 hr |
| Apr 22, 8:51 AM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown, Pike | 39 min |
| Apr 22, 9:16 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Pike | 44 min |
| Apr 22, 9:36 AM CDT | Flash Flood Warning | LSX | Adams, Brown, Pike | 3 hr |
| Apr 22, 9:59 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Greene, Jersey, Macoupin, Madison, Montgomery and 1 more | 46 min |
| Apr 22, 10:17 AM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 43 min |
| Apr 22, 10:56 AM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Fayette, Macoupin, Madison, Montgomery and 1 more | 49 min |
| Apr 22, 11:00 AM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 45 min |
| Apr 22, 11:41 AM CDT | Areal Flood Advisory | LSX | Bond, Fayette, Macoupin, Madison, Montgomery | 3 hr |
| Apr 22, 11:44 AM CDT | Severe Thunderstorm Warning | LSX | Clinton, Madison, Monroe, Saint Clair, Washington | 46 min |
| Apr 22, 12:21 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette | 39 min |
| Apr 22, 1:33 PM CDT | River Flood Warning | LSX | Brown | 22 hr |
| Apr 22, 6:55 PM CDT | Tornado Warning | LSX | Calhoun | 50 min |
| Apr 22, 6:58 PM CDT | Severe Thunderstorm Warning | LSX | Jersey, Macoupin, Madison | 47 min |
| Apr 21, 9:24 PM CDT | River Flood Warning | LSX | Gasconade, Montgomery | 11 days |
| Apr 21, 10:14 PM CDT | River Flood Warning | LSX | Reynolds | 9 days |
| Apr 22, 8:47 AM CDT | Severe Thunderstorm Warning | LSX | Boone, Callaway, Cole, Moniteau, Osage | 43 min |
| Apr 22, 9:28 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Lincoln, Montgomery, Pike, Warren | 47 min |
| Apr 22, 9:32 AM CDT | Severe Thunderstorm Warning | LSX | Callaway, Cole, Franklin, Gasconade, Lincoln, Montgomery and 2 more | 43 min |
| Apr 22, 12:34 PM CDT | River Flood Warning | LSX | Saint Charles | 26 hr |
| Apr 22, 2:39 PM CDT | River Flood Warning | LSX | Marion | 37 hr |
| Apr 22, 4:32 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Moniteau | 43 min |
| Apr 22, 4:40 PM CDT | Tornado Warning | LSX | Cole, Moniteau | 50 min |
| Apr 22, 5:10 PM CDT | Severe Thunderstorm Warning | LSX | Crawford, Franklin, Gasconade | 39 min |
| Apr 22, 5:12 PM CDT | Tornado Warning | LSX | Boone, Callaway, Cole | 48 min |
| Apr 22, 5:49 PM CDT | Tornado Warning | LSX | Callaway, Gasconade, Montgomery, Osage | 41 min |
| Apr 22, 6:05 PM CDT | Severe Thunderstorm Warning | LSX | Cole, Osage | 40 min |
| Apr 22, 6:22 PM CDT | Tornado Warning | LSX | Franklin, Gasconade, Lincoln, Montgomery, Warren | 38 min |
| Apr 22, 6:36 PM CDT | Severe Thunderstorm Warning | LSX | Franklin, Gasconade, Osage | 39 min |
Nearby
Flash Flood Warnings in Illinois, 2011Flash 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.