4 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 Jul 11, 1:01 PM CST, 4 hours 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 201 PM CDT FRI JUL 11 2003 LATEST SURFACE ANALYSIS HAD LOW PRESSURE CENTERED OVER THE NORTH CHANNEL OF LAKE HURON...WITH A COLD FRONT EXTENDING SOUTH THROUGH THE TENNESSEE VALLEY. IN ADDITION...A SURFACE TROF EXTENDED SOUTHWEST FROM THE LOW ACROSS SOUTHERN WISCONSIN INTO IOWA. MAIN CONCERNS THROUGH THE SHORT TERM REVOLVE AROUND THE RISK OF SHOWERS/STORMS THIS EVENING AND TEMPERATURES (WHICH WILL BE UNSEASONABLY COOL FOR THE MOST PART). 12Z MODELS IN GOOD AGREEMENT OVERALL...WITH NO PREFERRED MODEL NOTED. GUIDANCE TEMPERATURES CLOSE AND REASONABLE AS WELL...SO WILL NOT STRAY TOO FAR. TONIGHT...UPSTREAM SHORT WAVE...ASSOCIATED SPEED MAX AND SURFACE TROF WILL MOVE THROUGH FORECAST AREA THIS EVENING. RESIDUAL DIURNAL HEATING COMBINED WITH MID LEVEL COOLING WITH THE UPPER WAVE WILL PRODUCE CAPE VALUES AROUND 1200 J/KG AND LI VALUES AROUND -4 C. THESE FACTORS SUPPORT GOING WITH A CHANCE OF SHOWERS AND STORMS THIS EVENING AREAWIDE. WILL CARRY THE HIGHEST CHANCE IN THE NORTHEAST HALF OF THE FORECAST AREA NEAREST THE LEFT EXIT REGION FORCING WITH THE UPPER SPEED MAX. SINCE THE PRECIPITATION WILL BE LARGELY DIURNAL IN NATURE...WILL NOT CARRY IT THROUGH THE NIGHT. SATURDAY THROUGH SUNDAY...UPPER LOW OVER THE GREAT LAKES WILL GRADUALLY LIFT OUT WITH TIME...WITH THE FLOW ACROSS SLOWLY BECOMING NEUTRAL. WE WILL STILL BE UNDER THE INFLUENCE OF MOISTURE WRAPPING AROUND THE UPPER LOW THROUGH THE PERIOD...AND THIS WILL COMBINE WITH THE ASSOCIATED COLD POOL TO RESULT IN DIURNAL CU DEVELOPMENT DAILY. FEEL THE RISK OF DIURNAL SHOWER/STORMS IS TOO LOW TO MENTION AT THIS TIME EITHER SATURDAY OR SUNDAY. WHILE DAYTIME HEATING SHOULD STILL YIELD CAPE VALUES AROUND 1100 J/KG AND LI VALUES NEAR -3C...THE LACK OF FORCING FROM AN UPPER WAVE AND/OR SURFACE TROF SHOULD PRECLUDE PRECIPITATION DEVELOPMENT. MONDAY...WAA BEGINS TO BUILD IN FROM THE WEST IN ADVANCE OF NEXT MAJOR WAVE. THIS IS THE WAVE THAT WILL PUSH A COLD FRONT THROUGH REGION ON TUESDAY/WEDNESDAY. BEST WAA/ISENTROPIC ASCENT WILL BE CONFINED TO THE UPPER MIDWEST (NEAREST THE UPPER WAVE)...SO WE SHOULD NOT SEE ANY WARM FRONTAL PRECIPITATION ACROSS CENTRAL ILLINOIS. HOWEVER...THE WAA WILL RESULT IN TEMPERATURES RETURNING TO SEASONAL NORMALS. TUESDAY THROUGH FRIDAY...MODEL/ENSEMBLE AGREEMENT IS NOT THE BEST THIS RUN. THE MOST IMPORTANT DIFFERENCE IS WITH THE FRONTAL SPEED FOR TUESDAY AND WEDNESDAY. ALSO...THERE ARE DIFFERENCES REGARDING THE PLACEMENT OF THE UPPER RIDGE/TROF PATTERN OVER THE CENTRAL AND EASTERN U.S. ONCE THE FRONT PASSES. DO NOT PLAN ON MAKING TOO MANY CHANGES AT THIS TIME GIVEN THE UNCERTAINTY...THOUGH I WILL END THE SHOWER/STORM THREAT EARLIER ON WEDNESDAY WITH MOST MODEL SOLUTIONS EXPECTING THE FRONT TO BE THROUGH. WILL MAINTAIN DRY FORECAST FOR THE REMAINDER OF THE PERIOD...THOUGH THERE ARE SIGNS THAT WE MAY BE UNDER ENOUGH OF THE INFLUENCE OF THE UPPER TROF/COLD POOL TO WARRANT A RISK OF SHOWERS/STORMS (MUCH LIKE TODAY). .ILX...NONE. BAK
ILZ027>031-036>038-040>057-061>063-066>068-071>073-121100- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 1100 AM CDT FRI JUL 11 2003 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND SOUTHEAST ILLINOIS. .DAY ONE...TODAY AND TONIGHT A DISTURBANCE IS FORECAST TO TRACK ACROSS THE MIDWEST THIS AFTERNOON AND EVENING. SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP ALONG AND AHEAD OF THIS DISTURBANCE THIS AFTERNOON AND TRACK SOUTHEAST ACROSS PARTS OF CENTRAL AND SOUTHEAST ILLINOIS. ANY STORMS THAT DEVELOP THIS AFTERNOON AND EVENING WILL HAVE THE POTENTIAL OF PRODUCING LARGE HAIL AND DAMAGING WIND GUSTS. THE THREAT FOR SEVERE WEATHER WILL DIMINISH BY THE MIDDLE OF THE EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY A FRONTAL SYSTEM WILL APPROACH THE MIDWEST EARLY NEXT WEEK INCREASING OUR CHANCES FOR SHOWERS AND THUNDERSTORMS ON TUESDAY AND WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON INTO THE EARLY EVENING HOURS...MAINLY FROM 200 PM TO 900 PM. EH
The Lincoln radar (KILX), 102 km away, was scanning. The volume nearest the first event began at 23:30 UTC.
4 thunderstorm wind. Local standard time, as filed.
Several large trees were either blown down or snapped off. Also, numerous tree limbs and power lines were blown down.
Thunderstorm winds blew over a tree, knocked some shingles and siding off of a house and destroyed a section of fencing. No injuries were reported.
A CB tower was blown over onto a house causing minor damage. No injuries were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2003Every state in 2003This day in weather historyWarnings in Illinois, July 2003
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: 5330202, 5330203, 5330481, 5330482.