9 thunderstorm wind, as filed by the National Weather Service.
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 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 Lincoln, IL wrote its last area forecast discussion before the first event at Aug 18, 8:15 PM CST, 1 hour 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 915 PM CDT THU AUG 18 2005 .DISCUSSION... SFC MAP INDICATES SFC LOW IN SOUTHERN WISCONSIN... WITH ASSOCIATED COLD FRONT DRAPED THROUGH EASTERN IA AND BACK ACROSS NORTHERN MISSOURI. A WEAKENING WARM FRONT IS STRETCHED IN A N-S FASHION ACROSS CENTRAL ILLINOIS. APPEARS AS THOUGH WEAK CAPPING INVERSION... ALONG WITH SUBSIDENCE ALOFT... SQUASHED ANY CONVECTION CHANCES EARLIER THIS AFTERNOON AND EVENING. HOWEVER... STORMS HAVE BEGUN DEVELOPING ALONG THE COLD FRONT IN NORTHERN MISSOURI... WITH MORE SCATTERED ACTIVITY POPPING UP AFTER SUNSET ACROSS THE SOUTHERN HALF OF THE CWA. SCATTERED CONVECTION... NOT ALONG THE MAIN COLD FRONT... IS LIKELY SPARKING UP IN ASSOCIATION WITH MODEST WARM AIR/THETA-E ADVECTION ASSOCIATED WITH STRENGTHENING LLJ... WHICH STILL REMAINS FOCUSED FARTHER WEST. 18Z ETA SEEMS TO HAVE A FAIRLY GOOD HANDLE ON THINGS... AND INDICATES STRENGTHENING H85 LLJ OVERNIGHT WILL AID IN MCS DEVELOPMENT ACROSS NORTHERN MISSOURI... WHICH SHOULD TRACK EAST OR ESE-WARD ACROSS AT LEAST THE SOUTHERN HALF OF THE CWA. MORE SCATTERED CONVECTION MAY FIRE FARTHER NORTH ALONG AND AHEAD OF THE COLD FRONT... BUT PRIMARY AREA APPEARS TO BE FOCUSED FARTHER SOUTH... CLOSER TO LLJ AXIS. UPPER AIR MAPS INDICATE STRONG 50-60 KT H5 JET AXIS NOSING INTO SOUTHERN WISCONSIN. SO WHILE OVERALL SHEAR HAS BEEN INCREASING... STILL LOOKS LIKE THE STRONGEST SHEAR WILL REMAIN NORTH OF THE AREA IN WISCONSIN... WHERE IT HAS BEEN A BUSY AFTERNOON AND EVENING. ALTHOUGH THE STRONGEST SHEAR REMAINS NORTH... THE 00Z ILX SOUNDING INDICATED STRENGTHENING WIND FIELDS SINCE 18Z... WITH 0-3 KM SHEAR INCREASING TO ABOUT 40 KTS. SOUNDING WIND PARAMETERS INDICATES A PRIMARY THREAT OF STRONG WINDS... WITH STRONGEST SHEAR BELOW 3KM... SUPPORTING LINE SEGMENTS WITH POSSIBLE BOW ECHOES. SOME OF THE LESS ORGANIZED... PULSEY CELLS MAY ALSO BE CAPABLE OF PRODUCING STRONG GUSTY WINDS AS WELL. WILL BE ISSUING A ZONE UPDATE SHORTLY... WHICH BASICALLY INCREASES POPS ACROSS THE SOUTHERN HALF OF THE CWA... IN LINE WITH THE OVERNIGHT MCS THINKING. && .PREV DISCUSSION... CONCERN TODAY IS POSSIBLE REFIRING CONVECTION THIS EVENING AND OVERNIGHT...PLUS THE CONVECTION WITH THE STRONG COLD FRONT ON FRIDAY NIGHT...AND FINALLY THE HIGH PRESSURE THEN BUILDING IN FOR THE EXTENDED PERIODS. .SHORT TERM...TONIGHT THROUGH SATURDAY NIGHT CONVECTION FROM PREVIOUS STORMS OVER NORTHERN AND SOUTHERN ILLINOIS HAVE LEFT BEHIND SIGNIFICANT BOUNDARIES OVER ILLINOIS, SOUTHERN ILLINOIS AND MISSOURI. 18Z SOUNDING FROM ILX SHOWS SOMEWHAT OF A CAP IN THE REGION. THIS PLUS THE SUBSIDENCE BEHIND THE UPPER LEVEL WAVE THAT FIRED THE MORNING CONVECTION IS HELPING TO HOLD DOWN DEVELOPMENT SO FAR. HOWEVER, MSAS DATA SHOWS AIRMASS IN MO AND SOUTHERN IA CONTINUES TO DESTABLIZE IN AFTERNOON HEATING. PROFILER DATA CONTINUES TO SHOW 50-60 KNOTS AT 300MB. MOISTURE CHANNEL DATA STILL SUGGEST MINOR WAVE ROTATING AROUND WESTERN WI LOW CENTER THAT WILL AID IN POSSIBLE STORM DEVELOPMENT THIS EVENING. 5KM WRF ALSO SUGGEST DEVELOPMENT, AS STILL FEEL LEFT OVER LOW LEVEL BOUNDARIES FROM MORNING CONVECTION WILL COMBINE WITH DIFFERENTIAL HEATING TO TRIGGER DEVELOPMENT. MODIFIED POPS FOR TONIGHT TO KEEP JUST CHANCE POPS OVER CWA, WITH THE BEST CHANCE IN THE NORTHWEST SECTION. WARM AND HUMID CONDITIONS WILL BE THE RULE ON FRIDAY, AS THE WARM SECTOR TAKES HOLD OF THE REGION. THE APPROACHING COLD FRONT WILL BE SIGNIFICANT ONE, AS BOTH THE GFS AND NAM ARE IN GOOD AGREEMENT OF A SURFACE LOW IN IA IN RESPONSE TO THE MAJOR UPPER LEVEL TROF MOVING ACROSS THE NORTHERN PLAINS. FOR CWA, EXPECT CONVECTIVE DEVELOPMENT IN IA FRIDAY, MOVING INTO THE ILX CWA DURING THE EVENING FRIDAY AND CROSSING THE AREA IN THE MORNING HOURS. I INCREASED THE POPS AND MODIFIED THE QPF WITH THIS SYSTEM COMING THROUGH. SEVERE POTENTIAL LOOKS FAVORABLE DUE TO THE STRENGTH OF THE UPPER LEVEL SYSTEM AND THE AMOUNT OF UNSTABLE AIR THAT WILL BE AVAILABLE. CAP OF WARM AIR AHEAD OF THE SYSTEM WILL AID IN KEEPING INSTABILITY PRIMED. .LONG TERM...SUNDAY THROUGH THURSDAY HIGH PRESSURE TO BUILD INTO MIDWEST BEHIND SATURDAY COLD FRONT. VERY LITTLE DIFFERENCE BETWEEN LONG RANGE GFS AND EUR OR UK MODELS. SIGNFICANT HIGH PRESSURE CENTER TO REACH SOUTHERN LAKE MICHIGAN BY TUESDAY/12Z...AND THEN MOVING OFF TO THE EAST SOUTHEAST. HAD TO LOWER MORNING LOW AND AFTERNOON HIGH TEMPS PLUS DEW POINT GRIDS FOR SUNDAY THROUGH WEDNESDAY...AS AIRMASS WITH HIGH CENTER IS COOLER AND DRIER...MATCHING GFS MOS AND NMC MANUAL PROG GUIDANCE. && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. HARDIMAN/GOETSCH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 1114 AM CDT THU AUG 18 2005 ILZ027>031-036>038-040>057-061>063-066>068-071>073-191100- KNOX-STARK-PEORIA-MARSHALL-WOODFORD-FULTON-TAZEWELL-MCLEAN- SCHUYLER-MASON-LOGAN-DE WITT-PIATT-CHAMPAIGN-VERMILION-CASS- MENARD-SCOTT-MORGAN-SANGAMON-CHRISTIAN-MACON-MOULTRIE-DOUGLAS- COLES-EDGAR-SHELBY-CUMBERLAND-CLARK-EFFINGHAM-JASPER-CRAWFORD- CLAY-RICHLAND-LAWRENCE- 1114 AM CDT THU AUG 18 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST ILLINOIS...CENTRAL ILLINOIS AND EAST CENTRAL ILLINOIS. .DAY ONE...THIS AFTERNOON AND TONIGHT A WARM FRONT WILL LIFT NORTHWARD THROUGH THE AREA TODAY AND COMBINE WITH INCREASING LOW LEVEL MOISTURE TO PRODUCE THUNDERSTORMS ACROSS THE AREA...ESPECIALLY LATE THIS AFTERNOON AND INTO TONIGHT. THERE IS A SLIGHT RISK THAT SOME OF THESE STORMS COULD BECOME SEVERE...WITH DAMAGING WINDS AND HAIL THE MAIN THREAT. ISOLATED TORNADOES ARE ALSO POSSIBLE NORTH OF INTERSTATE 72. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A FRONTAL SYSTEM WILL REMAIN OVER THE AREA FRIDAY AND BRING ANOTHER ROUND OF THUNDERSTORMS TO THE AREA FRIDAY NIGHT AND SATURDAY. THERE IS A SLIGHT RISK OF SEVERE WEATHER NORTHWEST OF THE ILLINOIS RIVER ON FRIDAY NIGHT. IN ADDITION...HOT AND HUMID WEATHER WILL RETURN TO THE AREA FRIDAY AFTERNOON WITH HEAT INDEX VALUES OF 100 TO 105. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED LATER THIS AFTERNOON...AND INTO TONIGHT HJS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LINCOLN IL 558 PM CDT THU AUG 18 2005 ILZ036-040-042-047>052-190500- CASS-CHRISTIAN-FULTON-LOGAN-MENARD-MORGAN-SANGAMON-SCHUYLER- SCOTT- 558 PM CDT THU AUG 18 2005 ...THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 731 IN EFFECT UNTIL 12 AM CDT FOR THE FOLLOWING AREA... IN ILLINOIS THIS WATCH INCLUDES 10 COUNTIES IN CENTRAL ILLINOIS CHRISTIAN... LOGAN... MASON... MENARD... SANGAMON... IN WEST CENTRAL ILLINOIS CASS... FULTON... MORGAN... SCHUYLER... SCOTT... THIS INCLUDES THE CITIES OF...HAVANA...JACKSONVILLE...LINCOLN... SPRINGFIELD AND TAYLORVILLE.
The Lincoln radar (KILX), 56 km away, was scanning. The volume nearest the first event began at 03:29 UTC.
9 thunderstorm wind. Local standard time, as filed.
Numerous trees, tree limbs, power lines and a corn field were blown down. The storms also blew down several tents at the state fairgrounds. No injuries were reported. Hail to one inch in diameter was also reported as the storms moved through.
A few trees blown down.
A few tree limbs blown down.
A few trees and power lines were blown down. Also, a roof was blown off a shed.
A few trees and power lines blown down.
Tree limbs blown down countywide.
A few trees and tree limbs were blown down.
Several tree limbs and power lines blown down.
Numerous trees and power lines blown down. Two trees were blown down onto parked cars and damaged them. No injuries were reported. Some crop damage was caused by nickel size hail.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2005Every state in 2005This day in weather historyWarnings in Illinois, August 2005
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: 5469231, 5469232, 5469238, 5469236, 5469237, 5469239, 5469235, 5469233, 5469234.