The Mississippi River hit major flood stages at several locations along the Illinois border. Damage was limited to agricultural lowlands and a few closed roads.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LSX wrote it up.
The Mississippi River hit major flood stages at several locations along the Illinois border. Damage was limited to agricultural lowlands and a few closed roads. The river remained above flood stage into May.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS St. Louis, MO wrote its last area forecast discussion before the first event at Apr 12, 5:39 AM CST, 1 hour 36 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED AVIATION NATIONAL WEATHER SERVICE ST LOUIS MO 639 AM CDT FRI APR 12 2013 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 320 AM CDT FRI APR 12 2013 THE VERTICALLY STACKED LOW CURRENTLY CENTERED IN THE VICINITY OF NRN IOWA WILL MOVE NORTHEASTWARD INTO THE UPPER GREAT LAKES TODAY. AN EXPANSIVE AND BROAD CYCLONIC CIRCULATION ASSOCIATED WITH THE VORTEX WILL PERSIST ACROSS THE REGION TODAY WITH A CONTINUED FLUX OF STRATUS AND ADDITIONAL STRATOCU DEVELOPING. THESE CONDITIONS WILL RESULT IN ANOTHER COOL DAY WITH WELL BELOW AVERAGE HIGH TEMPERATURES. THE SYSTEM WILL ONLY MEANDER A BIT NEWD TONIGHT KEEPING A BROAD CYCLONIC FLOW ACROSS THE REGION. RH PROGS SUGGEST THAT THE STRATUS SHOULD FINALLY CLEAR DURING THE EVENING HOURS. WEAK HIGH PRESSURE ACROSS THE PLAINS WILL THEN SLIDE SEWD ACROSS SW MO OVERNIGHT HOWEVER WSW SURFACE WINDS OF 4-8 KTS WILL PERSIST ACROSS MUCH OF THE CWA. THIS WIND FLOW ALONG THE THE POTENTIAL FOR AN INCREASE IN MID CLOUDS OVERNIGHT LEADS TO SOME UNCERTAINTY IN THE POTENTIAL FOR SIGNIFICANT FROST AND MUCH LONGEVITY OF SUB- FREEZING TEMPERATURES. AT THIS TIME I HAVE ONLY A SMALL PORTION OF NE MO DROPPING BELOW FREEZING WITH PATCHY FROST FOR THE ENTIRE AREA WITH LOWS IN THE 32-34 DEGREE RANGE. WILL LET THE DAY SHIFT GET A BETTER LOOK TO ASSESS THE NEED FOR ANY FROST OR FREEZE HEADLINES. GLASS .LONG TERM...(SATURDAY THROUGH THURSDAY) ISSUED AT 320 AM CDT FRI APR 12 2013 BIG CHANGES UNDERWAY DURING THIS PERIOD. THE WEAK HIGH PRESSURE SYSTEM WILL SLOWLY RETREAT TO THE EAST ON SATURDAY AND HEIGHTS ALOFT WILL BE ON THE RISE...RESULTING IN THE INITIAL STAGES OF MODERATING TEMPERATURES. THE LOW LEVEL WAA REGIME WILL BEGIN TO GET WELL UNDERWAY ON SATURDAY NIGHT AS A NEW SYSTEM MOVES INTO THE PLAINS AND THE LOWER TROP FLOW STRENGTHENS CONSIDERABLY. A FEW SPOTTY SHOWERS COULD RESULT ACROSS NE MO INTO WEST CENTRAL IL IN RESPONSE. THERE SHOULD BE A BIG JUMP IN TEMPERATURES ON SUNDAY AS STRONG SOUTHERLY FLOW TRANSPORTS WARM AIR AND MOISTURE INTO THE MS VALLEY AHEAD OF THE ENCROACHING COLD FRONT. THESE ADVECTIONS AND AN INCREASE IN MID LEVEL LAPSE RATES PRODUCE AN AXIS WEAK INSTABILITY AND SUPPORT A CHANCE OF THUNDERSTORMS IN THE AFTERNOON ACROSS NE MO ON THE LEADING EDGE OF DEEPER ASCENT. THE FRONT THEN SETTLES SOUTHWARD SUNDAY NIGHT THROUGH MONDAY WITH AN INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS BOTH ALONG AND AHEAD OF THE FRONT. INDICATIONS AT THIS TIME ARE THE FRONT WILL BECOME QUASI- STATIONARY ACROSS THE SOUTHERN PORTION OF THE CWA THROUGH THE FIRST HALF OF NEXT WEEK AS IT PARALLELS THE FLOW ALOFT. THIS WOULD LEAD TO A STORMY PERIOD WITH PERSIST THUNDERSTORM CHANCES AS DISTURBANCES WITHIN THE SW FLOW ALOFT TRAVERSE THE REGION AND INTERACT WITH THE STALLED BOUNDARY. GLASS && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SATURDAY MORNING) ISSUED AT 626 AM CDT FRI APR 12 2013 ONLY MINOR CHANGES TO THE PREV TAF. EXPECT GUSTY WLY WINDS TODAY AS SFC RIDGE MOVES INTO THE REGION. WINDS WILL DIMINISH THIS EVENING. EXPECT CU FIELD TO DEVELOP THIS MORNING AND FILL IN MOST OF THE CURRENT CLEAR AREAS. CU MAY BRIEFLY BE HIGH END MVFR BEFORE QUICKLY LIFTING TO AROUND 5 KFT...EXCEPT AT UIN WHERE HIGH MVFR CIGS SHUD REMAIN FOR A FEW HOURS BEFORE LIFTING TO LOW VFR. EXPECT CU TO DISSIPATE AFTER SUNSET. SPECIFICS FOR KSTL...EXPECT WLY WINDS TODAY WITH GUSTS AROUND 20 KTS. CU FIELD SHUD DEVELOP THIS MORNING WITH BASES BEGINNING AROUND LOW VFR AND LIFTING TO AROUND 5 KFT THRU THE MORNING. WINDS WILL DIMINISH AND CU DISSIPATE THIS EVENING. TILLY && .LSX WATCHES/WARNINGS/ADVISORIES... MO...NONE. IL...NONE. && WFO LSX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ST LOUIS MO 442 AM CDT FRI APR 12 2013 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-130945- GREENE IL-MACOUPIN IL-MONTGOMERY IL-BOND IL-FAYETTE IL-CLINTON IL- MARION IL-WASHINGTON IL-RANDOLPH IL-ADAMS IL-BROWN IL-PIKE IL- CALHOUN IL-JERSEY IL-MADISON IL-ST. CLAIR IL-MONROE IL-KNOX MO- LEWIS MO-SHELBY MO-MARION MO-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-ST. CHARLES MO-FRANKLIN MO- ST. LOUIS MO-ST. LOUIS CITY MO-JEFFERSON MO-CRAWFORD MO- WASHINGTON MO-ST. FRANCOIS MO-STE. GENEVIEVE MO-IRON MO- MADISON MO-REYNOLDS MO- 442 AM CDT FRI APR 12 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EASTERN AND CENTRAL MISSOURI AS WELL AS WEST CENTRAL AND SOUTHWEST ILLINOIS. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THERE IS A CHANCE FOR THUNDERSTORMS ACROSS MUCH OF THE AREA BEGINNING SUNDAY AFTERNOON AND CONTINUING INTO THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. GLASS
The national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
The Mississippi River reached major flood levels along the border of Pike County. The river crested on April 21st and 22nd, but remained above flood stage into May. Damage was limited to a few closed roads and agricultural lowlands.
The Mississippi River reached major flood levels along the border of Calhoun County. The river crested on April 22nd and 23rd but remained above flood stage into May. Damage was limited to a few closed roads and agricultural lowlands.
The Mississippi River reached major flood levels along the border of Jersey County. The river crested on April 25th, but remained above flood stage into May. Damage was limited to a few closed roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2013Every state in 2013This day in weather historyWarnings in Illinois, April 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 455711, 455715, 455717.