An isolated microburst produced damage in Clay county.
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 ILX wrote it up.
An isolated microburst produced damage in Clay county.
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 3, 12:43 PM CST, 2 hours 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LINCOLN IL 143 PM CDT FRI AUG 3 2007 .DISCUSSION... ISSUED 143 PM CDT FRI AUG 3 2007 LATEST SURFACE ANALYSIS HAD A DIFFUSE...NEARLY STATIONARY...FRONTAL BOUNDARY LYING IN THE VICINITY OF THE I-72 CORRIDOR. ALOFT...WEAK NORTHWEST FLOW WAS IN PLACE OVER THE MIDWEST...WHICH WAS ON THE DOWNSTREAM SIDE OF A RIDGE WHOSE AXIS EXTENDED FROM THE GULF COAST INTO THE CANADIAN PRAIRIES. A SHORT WAVE WAS UNDERCUTTING A PORTION OF THE RIDGE...BEGINNING TO TRACK EAST ACROSS THE NORTHERN PLAINS. MAIN NON HEAT RELATED FORECAST CONCERN IN THE SHORT TERM REVOLVES AROUND SHOWER/STORM CHANCES SATURDAY INTO SATURDAY NIGHT AS THE NORTHERN PLAINS WAVE MOVES THROUGH THE GREAT LAKES. OTHERWISE... INCREASING HEAT AND HUMIDITY IS THE THEME OF THIS FORECAST WITH HEAT INDICES IN THE VICINITY OF...OR IN EXCESS OF...100 DEGREES LIKELY FOR MUCH OF THE UPCOMING WEEK. 12Z MODELS IN PRETTY GOOD AGREEMENT THROUGH THE PERIOD. THERE ARE SOME DIFFERENCES IN THE TRACK OF THE WAVE COMING ACROSS THE PLAINS INTO THE GREAT LAKES...AND THESE DIFFERENCES WILL HAVE RAMIFICATIONS ON OUR CHANCE OF SHOWERS/STORMS. I TEND TO FAVOR THE FURTHER SOUTH GFS SOLUTION WHICH SEEMS TO FOLLOW THE THICKNESS AND MOISTURE GRADIENT BETTER. GUIDANCE TEMPERATURES GENERALLY CLOSE/REASONABLE... BUT THE MAV MAXES STILL SEEM TO BE ON THE HIGH SIDE OF REALITY. SHORT TERM...TONIGHT THROUGH MONDAY... TONIGHT...EXPECT QUIET WEATHER TONIGHT DESPITE THE FRONTAL BOUNDARY IN THE VICINITY DUE TO THE BUILDING UPPER RIDGE OVERHEAD. CAN/T RULE OUT AN ISOLATED SHOWER/STORM ALONG THE FRONT THIS EVENING UNTIL THE SUN GOES DOWN...SO WILL LIKELY CARRY ISOLATED MENTION ALONG AND SOUTH OF THE FRONT. SATURDAY AND SATURDAY NIGHT...NORTHERN PLAINS SHORT WAVE WILL INITIALLY TRACK EAST INTO THE GREAT LAKES...EVENTUALLY FALLING TOWARD THE SOUTHEAST ON THE BACK SIDE OF THE RIDGE. THE PASSAGE OF THIS WAVE WILL TIGHTEN UP THE THERMAL/MOISTURE GRADIENT OF THE FRONT IN OUR AREA AND LIFT IT BACK NORTH AS A WARM FRONT. WILL CONTINUE WITH CURRENT FORECAST THINKING OF SCATTERED SHOWER/STORM DEVELOPMENT IN THE VICINITY OF THE FRONT...ESPECIALLY IN THE NORTHEAST HALF OF THE FORECAST AREA. SATURDAY AFTERNOON/EVENING STILL APPEARS TO BE THE FAVORED TIME FRAME FOR STORMS. SUNDAY THROUGH MONDAY...THE FRONT IS EXPECTED TO LIFT NORTH OF THE FORECAST AREA BY EARLY SUNDAY AND STALL OUT NOT TOO FAR TO THE NORTH. THE UPPER FLOW IS EXPECTED TO BE A RATHER ZONAL/FLAT RIDGE OVERHEAD. WHILE IT WILL BE CLOSE...ESPECIALLY IF A CURRENTLY UN FORECAST SHORT WAVE RIPPLES THROUGH THE FLOW...ANY PRECIPITATION THAT FORMS SHOULD STAY NORTH OF THE FORECAST AREA. FOR THIS REASON...WILL CARRY A DRY FORECAST. HOWEVER...THIS POSITIONING OF THE SURFACE/UPPER FEATURES WILL ALLOW THE HEAT/HUMIDITY TO BUILD. SURFACE TEMPERATURES IN THE 90S AND DEW POINTS NEARING 70 WILL ALLOW AFTERNOON HEAT INDICES TO PUSH 100 DEGREES...A POINT THEY WILL EQUAL OR EXCEED FOR THE REMAINDER OF THE WEEK. LONG TERM...TUESDAY THROUGH FRIDAY...MODELS/ENSEMBLES IN CONTINUE TO BE REASONABLE AGREEMENT WITH THE OVERALL PATTERN OF A TROF OFF THE WEST COAST AND RIDGING ELSEWHERE OVER THE LOWER 48. THIS AGREEMENT MEANS ONE THING...THAT IT WILL BE HOT AND HUMID THROUGH THE PERIOD WITH AFTERNOON HEAT INDICES IN THE VICINITY OF 100 DEGREES F. A POINT OF LESSER CERTAINTY IS THE THREAT FOR AND TIMING OF ANY PRECIPITATION. WHILE WE WILL BE UNDER A HOT UPPER RIDGE...IT WILL BE RATHER FLAT. PIECES OF ENERGY IN THE NORTHERN STREAM AS WELL AS ENERGY EJECTING OUT OF THE PACIFIC COAST TROF COULD BRING A RISK OF STORMS TO THE REGION...BUT THE TIMING/TRACK OF ANY OF THESE FEATURES IS NOT CLEAR AT THIS POINT. THE MAIN SURFACE FRONTAL POSITION IS EXPECTED TO REMAIN TO OUR NORTH FOR MUCH OF THE PERIOD...ALONG WITH THE HIGHER PRECIPITATION RISK. ANOTHER NEGATIVE FOR CARRYING MUCH IN TERMS OF POPS IS THAT MODEL SOUNDINGS SUGGEST...NOT SURPRISINGLY... THAT WE MAY BE CAPPED FOR MUCH OF THE PERIOD. BAK && .AVIATION... ISSUED 1231 PM CDT FRI AUG 3 2007 CU FIELD BEGINNING TO DEVELOP ALONG STATIONARY FRONTAL BOUNDARY ROUGHLY ALIGNED ALONG THE I-72 CORRIDOR. SHOULD SEE SCT-BKN CU WITH BASES AROUND 5000FT THIS AFTERNOON AT ALL TERMINALS EXCEPT KPIA AND KBMI...WHERE LESS CLOUD COVER WILL BE NOTED. THESE CLOUDS WILL BE DIURNAL IN NATURE AND WILL QUICKLY FADE AWAY AFTER SUNSET. WILL SEE A GOOD DEAL OF CIRRUS BLOW-OFF FROM CONVECTION ACROSS THE NORTHERN PLAINS TONIGHT...BUT NO LOWER CLOUDS ARE ANTICIPATED. WINDS THROUGH THE ENTIRE TAF PERIOD WILL BE QUITE LIGHT. BARNES && .ILX WATCHES/WARNINGS/ADVISORIES... NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LINCOLN IL 312 PM CDT FRI AUG 3 2007 ILZ027>031-036>038-040>051-053-041100- CASS-CHAMPAIGN-DE WITT-FULTON-KNOX-LOGAN-MACON-MARSHALL-MASON- MCLEAN-MENARD-MORGAN-PEORIA-PIATT-SANGAMON-SCHUYLER-SCOTT-STARK- TAZEWELL-VERMILION-WOODFORD- 312 PM CDT FRI AUG 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS AND EAST CENTRAL ILLINOIS. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE SATURDAY AND SATURDAY NIGHT AS A FRONTAL BOUNDARY LIFTS NORTH ACROSS THE AREA. SEVERE WEATHER IS NOT ANTICIPATED AT THIS TIME. THE FRONTAL BOUNDARY WILL BE LOCATED JUST NORTH OF OUR AREA LATE IN THE WEEKEND AND INTO EARLY NEXT WEEK...AS A RESULT THERE WILL BE A SLIGHT CHANCE OF THUNDERSTORMS MAINLY ALONG AND NORTH OF INTERSTATE 74 DURING THE SUNDAY NIGHT THROUGH WEDNESDAY TIME PERIOD. THE ATMOSPHERE ACROSS THE MIDWEST WILL REMAIN HOT AND BECOME MORE HUMID INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX VALUES WILL STEADILY RISE DAY TO DAY...WITH READINGS ABOVE 100 POSSIBLE BY MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. ILZ052-054>057-061>063-066>068-071>073-041100- CHRISTIAN-CLARK-CLAY-COLES-CRAWFORD-CUMBERLAND-DOUGLAS-EDGAR- EFFINGHAM-JASPER-LAWRENCE-MOULTRIE-RICHLAND-SHELBY- 312 PM CDT FRI AUG 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL ILLINOIS...EAST CENTRAL ILLINOIS AND SOUTHEAST ILLINOIS. .DAY ONE...TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE ON SATURDAY AS A FRONTAL BOUNDARY SHIFTS NORTH OF OUR AREA BY EVENING. AT THIS TIME...IT APPEARS THE THREAT OF SEVERE WEATHER WILL BE LOW. THE ATMOSPHERE ACROSS THE MIDWEST WILL REMAIN HOT AND BECOME MORE HUMID INTO THE MIDDLE OF NEXT WEEK. HEAT INDEX VALUES WILL STEADILY RISE DAY TO DAY...WITH READINGS ABOVE 100 POSSIBLE BY MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED THROUGH TONIGHT. BARNES
The Evansville,IN radar (KVWX), 87 km away, was scanning. The volume nearest the first event began at 21:02 UTC.
1 thunderstorm wind. Local standard time, as filed.
A microburst produced roof damage to a shed and blew in its doors. Also a tree was blown down and an area of corn was flattened.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2007Every state in 2007This day in weather historyWarnings in Illinois, August 2007
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: 53666.