Strong thunderstorms moved across parts of northern Illinois during the afternoon and evening hours of April 22nd, producing small hail and heavy rain.
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 LOT wrote it up.
Strong thunderstorms moved across parts of northern Illinois during the afternoon and evening hours of April 22nd, producing small hail and heavy rain.
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 Chicago, IL wrote its last area forecast discussion before the first event at Apr 22, 10:18 AM CST, 1 hour 57 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1118 AM CDT FRI APR 22 2011 .DISCUSSION... 348 AM CDT WEAK SHOWERS CURRENTLY LIGHT UP THE RADAR THIS MORNING...AND OVERNIGHT THEY HAVE GENERALLY STAYED SOUTH OF INTERSTATE 88. IT TOOK A WHILE FOR THE DRY LOWER LEVELS TO SATURATE...AND FOR A CONSIDERABLE TIME OVERNIGHT...NOTHING BUT DRIZZLE WAS BEING REPORTED AT THE SURFACE. EXPECT A LULL IN ACTIVITY THIS MORNING AS WEAK WAA SLIDES EAST. THE WEATHER THIS EVENING IS LOOKING TO BECOME INTERESTING...ESPECIALLY SOUTH ACROSS CENTRAL ILLINOIS. THE WAVE RESPONSIBLE FOR OUR EVENING WEATHER IS NICELY DEPICTED ON WATER VAPOR IMAGERY THIS MORNING AND IS SLIDING ACROSS THE WYOMING/COLORADO BORDER...CO LOCATED WITH AN UPPER LEVEL TROUGH THAT WILL BE WORKING EAST. THIS WILL HELP LOW PRESSURE TO DEVELOP ACROSS THE PLAINS AND LIFT NORTH AND INTO ILLINOIS LATER THIS EVENING. AHEAD AND EAST OF THE LOW WILL BE A WARM FRONT THAT SHOULD APPROACH OUR SOUTHERN CWA INTO THE EVENING HOURS. WITH THE APPROACHING FRONT...WINDS TO GENERALLY REMAIN OUT OF THE EAST TODAY. HIGH TEMPS TO LIKELY BE LATE IN THE CALENDAR DAY AND COINCIDE WITH THE AFOREMENTIONED WARM FRONTAL PASSAGE. FOR THE MAJORITY OF THE CWA...IT WILL BE THE TYPICAL CHILLY DAY...ESPECIALLY FOR METRO CHICAGO WITH EASTERLY WINDS COMING RIGHT OFF THE LAKE. SOME SPECIFICS WITH THE FORECAST LOW TRACK...NAM HAS TRENDED NORTH FROM THE 18 TO 00 AND NOW 06Z RUNS...WITH THE SURFACE LOW MOVING FROM ROUGHLY QUINCY THROUGH GARY...WHICH IS ALSO IN AGREEMENT WITH THE EARLIER RUNS OF THE ECMWF. THE GFS IS ALSO ON BOARD WITH THE NORTHERLY TREND...BUT THE MAIN SURFACE FEATURE STAYS FURTHER WEST...WITH THE MAIN LOW TRACKING ACROSS ROCKFORD. OBVIOUSLY...THERE ARE A FAIR NUMBER OF UNCERTAINTIES THAT WILL MAKE THIS A CHALLENGE TO FORECAST TONIGHT. DID SIDE ON MORE OF AN ECMWF/NAM(ISH) SOLN FOR THE TRACK OF THE SURFACE FEATURES TODAY. GFS AND GEM SOLNS ARE ALL PULLING A LITTLE FURTHER NORTH AND WEST. THIS CHOICE IS ALSO SUPPORTED WITH THE CONSOLIDATED CLUSTERING OF THE GFS ENSEMBLE MEMBERS...WHERE ONLY ONE PERTURBATION WAS OUTSIDE OF THE OTHERS...AND THAT HAPPENS TO BE THE OPERATIONAL GFS. THE EVENING SYSTEMS IS LOOKING SIMILAR TO THE SYSTEM FROM EARLIER IN THE WEEK. GENERALLY EXPECT THUNDERSTORMS TO DEVELOP ALONG AND SOUTH OF THE FRONT AS IT LIFTS NORTH. THERE IS STILL SOME UNCERTAINTY AS TO HOW FAR NORTH THE FRONT WILL LIFT. THE PRIMARY HAZARDS INTO TONIGHT WILL BE DAMAGING WINDS AND HAIL...BUT DEPENDING ON HOW FAR NORTH THE WARM SECTOR MAKES IT...COULDNT RULE OUT TORNADIC ACTIVITY GIVEN THE THE SHEAR PROFILES. OUTSIDE OF TYPICAL SEVERE HAZARDS WILL BE THE THREAT FOR LOCALIZED HEAVY RAINFALL WITH THE PRECIPITABLE WATER AMOUNTS THAT WILL BE STEADILY INCREASING INTO THE EVENING HOURS. HAVING SAID ALL OF THAT...IF THE LOW DOES START TO SHOW SIGNS OF TRACKING MORE TO THE NORTH...WITH THE WARM FRONT RIDING FURTHER NORTH AS WELL...MORE OF THE CWA WILL BE UNDER THE INFLUENCE OF THE WARM SECTOR AND THE SEVERE THREAT COULD BE HIGHER...ESPECIALLY FOR AREAS IN THE SOUTH. SYSTEM SHOULD PULL OUT OVERNIGHT AND LIKELY AT OR AROUND THE MIDNIGHT HOUR...AS A WEAK COLD FRONT SLIDES PAST. WINDS WILL BECOME WESTERLY TO SOUTHWESTERLY ON SATURDAY FOR A SHORT TIME AND EXPECT TEMPERATURES TO APPROACH NORMAL. SUNDAY LOOKS TO BE A PRIME CANDIDATE FOR A GOOD LAKE BREEZE AS HIGH PRESSURE MOVES ACROSS AND FLOW ABOVE THE LOWER LAYERS REALLY DROPS OFF. THE FRONT THAT WILL MOVE OUT OF THE AREA TOMORROW NIGHT WILL GENERALLY STALL OUT TO OUR SOUTH AND EAST...AND REMAIN ACROSS THE OHIO VALLEY. THIS FRONT WILL EVENTUALLY LIFT NORTH AGAIN BEYOND THE WEEKEND AS THE NEXT POTENTIALLY SIGNIFICANT STORM SYSTEM LIFTS NORTH AND MAY PUT THE ENTIRE AREA IN THE WARM SECTOR. THE ACTIVE PATTERN WILL LIKELY CONTINUE THROUGH THE WEEK WITH TEMPERATURES SLOWLY INCHING HIGHER AND HIGHER THROUGH THE DAYS. SHEA && .HYDROLOGY... 219 PM CDT A NEARLY STATIONARY BOUNDARY ACROSS OKLAHOMA/ARKANSAS/TENNESSEE... IS EXPECTED TO GRADUALLY LIFT NORTH ACROSS ILLINOIS/INDIANA FRIDAY INTO SATURDAY. COUPLED WITH THIS BOUNDARY WILL BE ABUNDANT LOW LEVEL MOISTURE...ALLOWING THE ATMOSPHERE TO BECOME SATURATED. THIS MAY RESULT IN PERIODS OF RAIN...WHICH WILL BE HEAVY AT TIMES...AS SHOWERS AND THUNDERSTORMS DEVELOP FRIDAY AND CONTINUE INTO FRIDAY NIGHT. WITH ALREADY SATURATED SOILS FROM RECENT RAINFALL... ADDITIONAL FORECAST RAINFALL OF BETWEEN 0.5 AND 1.5 INCHES MAY RESULT IN INCREASED HYDROLOGY CONCERNS LATE THIS WEEK INTO THE EARLY WEEKEND. AN ACTIVE WEATHER PATTERN IS EXPECTED TO CONTINUE NEXT WEEK...WITH CONTINUED CHANCES FOR MULTIPLE ROUNDS OF AT LEAST MODERATE RAINFALL IN THE MON/TUE/WED PERIOD. AREA STREAMS HAVE BECOME ELEVATED FROM RECENT RAINFALL...AND WITH LITTLE TIME BETWEEN SYSTEMS ANY ADDITIONAL PRECIPITATION COULD RESULT IN MORE STREAMS MEETING OR EXCEEDING BANKFULL CONDITIONS OVER THE WEEKEND. MDB/BEACHLER && .AVIATION... //ORD AND MDW CONCERNS...UPDATED 16Z... * IFR CIGS AND VSBY...WITH POTENTIAL FOR FURTHER VSBY REDUCTIONS IN HEAVIER RAIN THROUGH EARLY AFTERNOON. * THUNDERSTORM POTENTIAL THIS AFTERNOON/EVENING. * CONTINUED SUSTAINED EAST WINDS 10-15 KNOTS...GUSTING UP TO AROUND 20 KN0TS. RC //DISCUSSION...UPDATED 12Z... A STRONG UPPER LEVEL DISTURBANCE WILL MOVE ACROSS THE NORTHERN AND CENTRAL PLAINS TODAY...RESULTING IN LOW PRESSURE DEVELOPMENT OVER KANSAS. THIS LOW IS FORECAST TO MOVE NORTHEAST TO THE MID AND UPPER MS VALLEY THIS EVENING. THIS WILL DRAW A WARM FRONTAL BOUNDARY /NOW EXTENDING FROM CENTRAL MO THROUGH THE OH VALLEY/ NORTHWARD INTO CENTRAL IL AND INDIANA. AS A RESULT...EXPECT VFR/MVFR CIGS NOW OVER AREA TO LOWER TO IFR BY EARLY AFTERNOON AS LOWER LEVELS SATURATE DUE TO PRECIPITATION...AND INFLUX OF HIGHER DEW POINT AIR JUST OFF THE SURFACE AHEAD OF THE WARM FRONT. ONGOING BAND OF RAIN/RAIN SHOWERS WILL SHIFT OFF TO THE EAST. RADAR TRENDS NOW SHOW A DIFFUSE BACK EDGE TO THIS RAIN AREA AND HAVE TIMED THIS ACROSS NRN IL...AND THROUGH THE CHI AREA BY 1430Z...AND THROUGH NWRN INDIANA 15-16Z. AREA WILL THEN BE IN REGION OF INCREASING EASTERLY FLOW WHICH IS EXPECTED TO MAINTAIN ENOUGH DRY AIR BELOW 1 THSD FT TO KEEP CIGS IN LOWER MVFR RANGE. HOWEVER...BY 17-18Z...CONVECTIVE COMPLEX NOW OVER NRN MO/FAR SRN IA WILL LIFT NORTHEASTWARD ACROSS NRN IL AND NWRN INDIANA. RAIN FROM WARM LAYER ALOFT SHOULD THEN RESULT IN ADDITIONAL LOWERING TO IFR CIGS. BY LATE AFTERNOON...STRONG SSWLY WINDS ABOVE ABOUT 2 THSD FT WILL PROVIDE AN INFLUX OF MILD/MOIST AIR. THIS...IN COMBINATION WITH THE APPROACH OF THE STORM SYSTEM TO THE WEST SHOULD PROVIDE ENOUGH ELEVATED INSTABILITY TO SUPPORT STRONGER THUNDERSTORM DEVELOPMENT. COOL BOUNDARY LAYER TEMPS MAY INHIBIT STRONG SURFACE WIND SHEARS IN THE VICINITY OF THESE STORMS...BUT HAIL WITH STRONGER CELLS IS A GREATER POSSIBILITY. A COLD FRONT IS FORECAST TO SWEEP RAPIDLY EASTWARD ACROSS THE AREA DURING THE LATE EVENING HOURS...GENERALLY AFTER 02Z. THIS FRONTAL PASSAGE WILL END THE THUNDER THREAT...BUT WINDS WILL SHIFT FROM ESE TO WSW AND INCREASE...WITH FREQUENT GUSTS AROUND 25 KT LIKELY. ALSO...RAGGED IFR CIGS ARE EXPECTED TO PERSIST FOR A FEW HOURS FOLLOWING THE COLD FRONTAL PASSAGE...BEFORE DRIER AIR ALLOWS FOR RETURN TO VFR CONDITIONS AFT 06Z. MERZLOCK //ORD AND MDW CONFIDENCE...UPDATED 16Z... * HIGH CONFIDENCE IN IFR CONDITIONS CONTINUING INTO THIS EVENING. * MEDIUM LOW CONFIDENCE IN THUNDER OCCURRENCE AND TIMING AT TERMINALS. * HIGH CONFIDENCE IN WIND SPEED AND DIRECTION. RC //OUTLOOK FOR ORD/MDW FOR 00Z SUNDAY-12Z FRIDAY...UPDATED 12Z... SATURDAY NIGHT...VFR. SUNDAY...MVFR. CHANCE OF SHOWERS. MONDAY...MVFR/IFR. SHOWERS AND THUNDERSTORMS. TUESDAY...MVFR. CHANCE OF SHOWERS. WEDNESDAY...MVFR. CHANCE OF SHOWERS. THURSDAY...VFR. MERZLOCK && .MARINE... 357 AM CDT SOUTHEAST AND EAST WINDS WILL BE ON THE INCREASE TODAY AS LOW PRESSURE OVER THE HIGH PLAINS MOVES NORTHEAST. AS THE LOW APPROACHES THE UPPER MIDWEST LATE THIS AFTERNOON WINDS WILL DIMINISH...WITH WINDS VEERING TO SOUTH AND SOUTHWEST AS THE LOW MOVES INTO THE UPPER GREAT LAKES OVERNIGHT. HIGH PRESSURE BUILDS EAST FROM THE PLAINS AND OVER THE MIDWEST SATURDAY BEHIND THE DEPARTING LOW. THIS HIGH DRIFTS ACROSS THE GREAT LAKES SUNDAY. ANOTHER SIGNIFICANT LOW WILL LIFT FROM THE PLAINS MONDAY...AND REACH THE UPPER MIDWEST TUESDAY MORNING WITH EAST AND SOUTHEAST WINDS ON THE INCREASE AGAIN. PREVAILING WINDS ARE NO LONGER EXPECTED TO REACH THE CRITERIA FOR A SMALL CRAFT ADVISORY ON THE INDIANA NEARSHORE WATERS TODAY AND THE ADVISORY HAS BEEN CANCELED THERE. TRS && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...SMALL CRAFT ADVISORY...ILLINOIS NEARSHORE WATERS UNTIL 10 PM FRIDAY. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 1124 AM CDT FRI APR 22 2011 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 231630- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 1124 AM CDT FRI APR 22 2011 /1224 PM EDT FRI APR 22 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...THIS AFTERNOON AND TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...A FEW MAY PRODUCE: HAIL TO ONE INCH. DAMAGING WIND GUSTS IN EXCESS OF 60 MPH. CLOUD TO GROUND LIGHTNING. ISOLATED TORNADOES. MODERATE RAINFALL AND BRIEF HEAVY DOWNPOURS. AREAS AFFECTED AND TIMING: ONGOING THUNDERSTORM ACTIVITY WILL SHIFT EAST OF THE AREA BY EARLY AFTERNOON WITH ADDITIONAL THUNDERSTORMS EXPECTED TO DEVELOP LATE THIS AFTERNOON INTO THE EVENING. THE MOST EXTENSIVE THUNDERSTORM COVERAGE WILL MAINLY BE SOUTH OF INTERSTATE 80...WITH COVERAGE MORE ISOLATED NORTH OF INTERSTATE 80. THE GREATEST POTENTIAL FOR SEVERE THUNDERSTORMS WILL BE ALONG AND SOUTH OF A LINE FROM PONTIAC TO KANKAKEE TO CHESTERTON. DISCUSSION: AN AREA OF LOW PRESSURE IS EXPECTED TO LIFT NORTH THROUGH THE PLAINS TODAY...AND INTO NORTHERN ILLINOIS OVERNIGHT. THIS AREA OF LOW PRESSURE WILL BE THE FOCUS FOR MUCH OF THE THUNDERSTORM ACTIVITY THIS EVENING AS A WARM FRONT THAT IS ASSOCIATED WITH IT...LIFTS NORTH ACROSS THE SOUTHERN OUTLOOK AREA THIS EVENING. IN ADDITION TO THE SEVERE WEATHER THREAT...MODERATE TO LOCALLY HEAVY RAINFALL IS POSSIBLE. THE ATMOSPHERE REMAINS SATURATED WITH AMPLE MOISTURE OVER THE OUTLOOK AREA. PORTIONS OF THE KANKAKEE...DES PLAINES...AND ILLINOIS RIVERS WILL REMAIN IN FLOOD TODAY AND TONIGHT WITH MANY OTHER RIVERS NEARING BANK FULL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. ADDITIONAL PRECIPITATION IS EXPECTED TO CONTINUE PERIODICALLY THIS WEEKEND THROUGH NEXT WEEK WHICH WILL PREVENT ANY SATURATED SOILS FROM DRYING. THIS WILL CAUSE CONTINUED FLOODING AND ELEVATED STREAM FLOW ON RIVERS THAT ARE ALREADY HIGH WITH ADDITIONAL FLOODING POSSIBLE ON THE REMAINING RIVERS. IN ADDITION...AREAL FLOODING AWAY FROM RIVERS WILL ALSO NEED TO BE MONITORED. PORTIONS OF THE KANKAKEE...DES PLAINES...AND ILLINOIS RIVERS WILL REMAIN IN FLOOD THROUGH THIS WEEKEND. PERIODIC THUNDERSTORM CHANCES WILL CONTINUE LATE THIS WEEKEND INTO NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTERS MAY BE NEEDED THIS AFTERNOON AND EVENING. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-231630- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 1124 AM CDT FRI APR 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT. STRONG WINDS AND HIGH WAVES WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT ALONG THE ILLINOIS NEARSHORE THROUGH THIS EVENING. THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON AND EVENING. SOME OF THE STORMS COULD BE SEVERE WITH LARGE HAIL AND STRONG WINDS GREATER THAN 35 KT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. PERIODIC THUNDERSTORM CHANCES WILL CONTINUE LATE THIS WEEKEND INTO NEXT WEEK. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-231630- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 1124 AM CDT FRI APR 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A CHANCE OF THUNDERSTORMS THIS AFTERNOON ACROSS SOUTHERN LAKE MICHIGAN AND ACROSS ALL OF LAKE MICHIGAN LATER THIS EVENING. SOME OF THE STORMS COULD BE SEVERE WITH LARGE HAIL AND STRONG WINDS GREATER THAN 35 KT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. PERIODIC THUNDERSTORM CHANCES WILL CONTINUE LATE THIS WEEKEND AND INTO NEXT WEEK. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO RODRIGUEZ
The Lincoln radar (KILX), 88 km away, was scanning. The volume nearest the first event began at 18:16 UTC.
1 flood, 1 hail. Local standard time, as filed.
Standing water up to 18 inches deep was reported in some intersections in Gibson City. Stormtotal rainfall amounts included 1.90 inches in Paxton and 1.05 inches in Piper City.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2011Every state in 2011This day in weather historyWarnings in Illinois, April 2011
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: 298988, 298987.