A severe thunderstorm downed a tree in Delaware County Iowa during the late evening of June 17. Around midnight early on June 18, lightning struck a man in Burlington, IA.
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 DVN wrote it up.
A severe thunderstorm downed a tree in Delaware County Iowa during the late evening of June 17. Around midnight early on June 18, lightning struck a man in Burlington, IA.
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 Quad Cities, IA wrote its last area forecast discussion before the first event at Jun 17, 2:00 PM CST, 8 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 300 PM CDT THU JUN 17 2010 .SYNOPSIS... UNSEASONABLY STRONG 994 MB CYCLONE 2-3 STANDARD DEVIATIONS FROM NORMAL CENTERED IN ND WITH IMPRESSIVE COLD FRONT EXTENDING ALONG THE MN/DAKOTAS BORDER TO EXTREME NW KS. VERY UNSTABLE AIRMASS AHEAD OF THE FRONT WITH CURRENT TEMPS 90+ WITH DEWPOINTS 70+. BEHIND THE FRONT DEWPOINTS DROP OFF DRAMATICALLY INTO THE 20S WITH GRADIENT WEST WINDS GUSTING TO 50 KNOTS. CLUSTERS OF STORMS WERE LOCATED IN ND AND NORTHERN MN WITH OTHER STORMS JUST STARTING TO ERUPT ALONG THE COLD FRONT IN EXTREME WESTERN MN. HAD A FEW STORMS EARLIER TODAY IN THE WESTERN DVN CWA BUT HAVE SINCE DISSIPATED AS THEY OUTRAN THE BETTER MOIST AXIS AND FORCING FURTHER TO THE WEST. CURRENT TEMPS IN THE DVN CWA WERE IN THE 80S WITH DEWS IN THE 60S TO LOWER 70S. ..HAASE.. && .SHORT TERM...TONIGHT AND FRIDAY... FULLY EXPECT A MATURE LINEAR MCS TO FORM REMAINDER OF THIS AFTERNOON FROM WESTERN MN TO WESTERN IA...AND THEN PROGRESS EAST. OPERATIONAL MODELS FAIRLY SIMILAR IN BRINGING THIS SQUALL LINE INTO OUR WESTERN CWA THIS EVENING WITH POTENTIAL FOR DAMAGING WINDS OF 60-70 MPH AND ISOLATED LARGE HAIL. MODERATE RISK REMAINS FOR SEVERAL COUNTIES IN THE CWA AND WILL MENTION SEVERE WORDING IN THE GRIDS/ZFP ONLY IN THE MODERATE RISK AREA. MCS SHOULD DIMINISH OVERNIGHT AS IT CONTINUES TO MOVE EAST OR SOUTHEAST. HAVE NOT ISSUED A FLASH FLOOD WATCH FOR THIS EVENT YET BUT LOCALLY VERY HEAVY RAIN MAY CAUSE FLASH FLOODING IN SOME SPOTS. WILL CONTINUE TO MONITOR THE PROGRESS OF THIS SITUATION AND A FLASH FLOOD WATCH CAN ALWAYS BE ISSUED THIS EVENING. THERMODYNAMICALLY SPEAKING THE GREATEST INSTABILITY IS TO OUR WEST AND THIS IS WHERE THE MOST INTENSE ACTIVITY SHOULD REMAIN. TIME WILL TELL. WILL FORECAST MIN TEMPS IN THE LOWER TO MID 70S SO THE MUGGIES ARE BACK WITH A VENGEANCE. FRIDAY...POTENTIALLY A MORE WIDESPREAD AND MORE INTENSE SEVERE WEATHER EVENT UNFOLDING FOR FRIDAY LATE AFTERNOON INTO FRIDAY NIGHT. AS IMPULSE PASSES BY TO THE NORTH TO SUPPLY SOME DYNAMICS AND MID LEVEL WINDS INCREASE TO OVER 50 KNOTS MODERATE TO STRONG DEEP LAYER SHEAR EXPECTED. COLD FRONT WILL BE APPROACHING FROM THE WEST WITH THE AIRMASS AHEAD OF THE FRONT HAVING MLCAPES OF 2000-3000 J/KG. SURFACE DEWS SHOULD BE AT LEAST IN THE LOWER TO MID 70S WITH TEMPS AROUND 90. THIS RAISES THE POTENTIAL FOR A WIDESPREAD WIND DAMAGE OR DERECHO EVENT WITH AT LEAST 70-80 MPH WINDS. THESE SPEEDS ALONG WITH SATURATED SOILS COULD EASILY BLOW OVER MANY MORE TREES THAN USUAL IN THIS TYPE OF EXTREME EVENTS. EXPECTING A HIGH END EVENT WITH CURRENTLY SPC HAVING THE ENTIRE CWA IN SLIGHT RISK WITH UPGRADE TO MODERATE RISK POSSIBLE. WILL MENTION SEVERE WORDING FOR FRIDAY AFTERNOON IN OUR WESTERN CWA AS COLD FRONT APPROACHES FROM THE WEST. STAY TUNED TO LATER FORECASTS AND HAZARDOUS WEATHER OUTLOOKS CONCERNING THIS SCENARIO. PRECIPITABLE WATERS WILL BE APPROACHING 2.00 INCHES SO CERTAINLY THE THREAT OF TORRENTIAL RAINS WITH RATES OF 2 INCHES PER HOUR RAISING THE RISK FOR FLASH FLOODING ON ALREADY SATURATED SOILS. ANY WIDESPREAD HEAVY RAINS WOULD ALSO GREATLY AGGRAVATE OR CAUSE NEW RIVER FLOODING. ..HAASE.. .LONG TERM...FRIDAY NIGHT THROUGH NEXT THURSDAY... ...SIGNIFICANT SEVERE WEATHER EVENT FRIDAY NIGHT...THEN A HIGHER END HEAVY RAIN EVENT SUNDAY INTO MONDAY...POTENTIALLY DANGEROUS FLASH FLOODING POTENTIAL MAIN CONCERN INTO MIDDLE OF NEXT WEEK... OVERVIEW...AS DISCUSSED YESTERDAY...GUIDANCE TRENDING TOWARD MAJOR CONVECTION INTO FRIDAY NIGHT TO SET UP OUTFLOW BOUNDARY WITH A 18-30 HOUR DRY PERIOD AHEAD OF NEXT MCS EVENT. THEN SUBSEQUENT CONVECTIVE EVENTS WILL FOLLOW 18 TO 30 HOURS LATER INTO WEDNESDAY OR EVEN THURSDAY WITH AREA REMAINING NEAR BATTLE-ZONE WITH HIGH RISK OF VERY HEAVY RAINFALL AND INCREASING HIGH END BOW ECHO TO LOW-MID STRENGTH DERECHO POTENTIAL INTO MIDDLE OF NEXT WEEK. BIGGEST CONCERN ARE HEAVY RAINS THAT COULD RESULT IN A MAJOR FLASH FLOODING AND FLOODING RISK. ALSO A HIGHER END SEVERE RISK FROM STRAIGHT LINE WINDS OF 60 TO OVER 80+ MPH INCREASINGLY POSSIBLE BY EARLY NEXT WEEK. GUIDANCE USED A 70/30 BLEND OF HI-RES ECMWF/GEM-NH MIX WITH THE GFS. CONFIRMATION OF MAGNITUDE OF MCS EVENT/S/ SUNDAY...MONDAY SHOULD BE ASCERTAINED NEXT 24 HOURS. FRIDAY NIGHT...UPPED POPS TO LIKELY WEST TO HIGH CHANCE EAST WITH A MODERATE SEVERE WEATHER EVENT WITH NW 1/2 FORECAST AREA MOST SUSCEPTIBLE FOR SEVERE WEATHER. LOCAL TOOLS SUGGEST STRONG COOL POOL TO DEVELOP WITH WIDESPREAD 40 TO 60+ MPH WINDS WITH ISOLATED 60 TO 70+ MPH INTO LATE EVENING HOURS. ISOLATED HAIL UP TO 1.25 INCHES AND EVEN A BRIEF TORNADO CAN/T BE RULED OUT OVER NW 1/4 TO 1/3 AREA UNTIL CIRCA 9 TO 10 PM. MOST LOCATIONS SHOULD RECEIVE MAINLY MODERATE RAINFALL AMOUNTS WITH LOCALIZED 1 TO 1.5+ INCH AMOUNTS. HIGH PW/S UP TO NEAR 2 INCHES TO PRODUCE RAINFALL RATES OF 1 TO 2 INCHES THAT COULD RESULT IN LOW END FLASH FLOODING IN URBAN AND LOW LYING LOCATIONS. KEPT LOWS IN THE UPPER 60S NW TO LOWER 70S SW AS FRONT PASSES BEHIND MCS BOWING COMPLEX. SATURDAY...POTENTIAL ENERGY RELEASED TO ALLOW FOR STRONGER SFC HIGH TO MOVE IN BEHIND LATENT HEAT ENHANCED SFC WAVE AND UPPER AIR VORT MAX TO ALLOW FOR DRY PERIOD AND SLIGHTLY COOLER AND LESS HUMID. LOWERED HIGHS 2 TO 4 DEGREES WITH SOME LOCATIONS POSSIBLY STILL A COUPLE OF DEGREES TOO WARM FOR LATER SHIFTS TO REASSESS. SATURDAY NIGHT...CLOUDS TO INCREASE LATE WITH SOME SHRA/TSRA TO POSSIBLY ARRIVE TOWARD DAYBREAK. LOCAL FORCING TOOLS SUGGEST PRECIPITATION ARRIVAL MAY BE A FEW HOURS STILL TOO QUICK. LOWS IN NE SECTIONS ALSO MAY NEED LOWERING BY 2 TO 3 DEGREES. SUNDAY/MONDAY...RISK OF A HIGH END FLASH FLOODING EVENT. HIGH END MCS/S/ WITH LOTS OF HEAVY RAIN AND RISK OF SEVERE WEATHER IN FORM OF STRAIGHT LINE WINDS UP TO 70 MPH OVER SOUTH 1/3 TO 1/2. LOCAL TOOLS SUGGEST HEAVIEST RAIN TO FALL ROUGHLY 40 MILES EITHER SIDE OF A WILLIAMSBURG TO MONMOUTH LINE WHERE 1 TO LOCALLY 4 PLUS INCH AMOUNTS SUGGESTED. VERY MOIST SOILS WOULD RESULT IN MODERATE TO HIGHER END FLASH FLOODING RISK WITH HIGHER END RIVER FLOODING. SINCE STILL SEVERAL DAYS OUT...WILL EMPHASIZE THIS ONLY IN THIS DISCUSSION AND REVIEW MAGNITUDE OF THIS RISK FRIDAY. LOCAL MEDIA PARTNERS AND INTERESTED INDIVIDUALS SHOULD CLOSELY MONITOR THIS SITUATION. TEMPS HAVE LOWERED HIGHS SIGNIFICANTLY AND EVIDENCE STILL TOO HIGH OVER NORTH 1/3 TO 1/2 BY AT LEAST 2 TO 5 DEGREES FOR LATER SHIFTS TO RECONSIDER. LOWS MADE ONLY MINOR CHANGES TO. TUESDAY AND WEDNESDAY...MINOR CHANGES...EVIDENCE NEXT MCS EVENT WITH HIGHER TEMPS AND INSTABILITY TO BE A STRONG BOW ECHO TO DERECHO WITH SIGNIFICANT AREAS OF 80+ MPH POSSIBLE. AS DISCUSSED YESTERDAY...THIS ALSO SHOULD BE BETTER DETERMINED FRIDAY. HIGHS WILL BE A CHALLENGE AS CONVECTIVE OUTFLOW MAY RESULT IN HIGHS 5+ DEGREES WARMER OR COLDER DEPENDING ON LOCATION. THURSDAY...HAVE SLIGHT CHANCE POPS WITH EVIDENCE OF MODEL CONVECTIVE INSTABILITY ISSUES. NWP INITIALIZATION TOOLS SUGGEST MAJOR CHANGES POSSIBLE IF NOT PROBABLE TO SUBSEQUENT RUNS FOR DAY 7 INTO NEXT WEEKEND. KEPT TEMPS ABOVE NORMAL AND HUMID FOR NOW. ..NICHOLS.. && .AVIATION... VFR CONDS REMAINDER OF THIS AFTERNOON BUT SQUALL LINE SHOULD BE MOVING INTO EASTERN IA THIS EVENING FROM THE WEST. MVFR TO OCNL IFR IN THUNDERSTORMS. STORMS SHOULD WEAKEN AND DIMINISH OVERNIGHT. ANOTHER ROUND OF WIDESPREAD STORM SHOULD ARRIVE LATE FRIDAY AFTERNOON OR EVENING. VFR CONDS OUTSIDE OF THUNDERSTORMS. SOUTH WINDS 10 TO 15 KNOTS THROUGH FRIDAY. ..HAASE.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && HAASE/NICHOLS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1013 AM CDT THU JUN 17 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-181515- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 1013 AM CDT THU JUN 17 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS LATE THIS AFTERNOON AND EVENING NORTHWEST OF A LINE FROM DUBUQUE IOWA TO WASHINGTON IOWA...AND A SLIGHT RISK FOR THE REST OF EASTERN IOWA AND FAR NORTHWEST ILLINOIS. ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE THIS MORNING AND EARLY AFTERNOON MAINLY WEST OF THE MISSISSIPPI RIVER. THESE STORMS ARE NOT EXPECTED TO BE SEVERE. LATE THIS AFTERNOON AND EVENING...SEVERE THUNDERSTORMS OVER THE NORTHERN PLAINS AND UPPER MIDWEST ARE EXPECTED TO DEVELOP INTO A LARGE COMPLEX AND MOVE SOUTHEAST ACROSS PORTIONS OF THE OUTLOOK AREA. THE PRIMARY THREAT WITH THESE STORMS WILL BE DAMAGING WINDS OF 60 TO 80 MPH... MAINLY OVER PORTIONS OF EASTERN IOWA...WITH LARGE HAIL AROUND THE SIZE OF QUARTERS ALSO POSSIBLE. IN ADDITION...HEAVY RAINFALL IN EXCESS OF AN INCH WILL BE POSSIBLE BRINGING A RISK OF FLASH FLOODING. AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A FRONTAL SYSTEM PUSHING INTO A VERY WARM AND HUMID AIRMASS ACROSS THE REGION WILL IGNITE STRONG TO SEVERE THUNDERSTORMS IN OR NEAR THE OUTLOOK AREA FRIDAY AFTERNOON AND EVENING. INDIVIDUAL STORM CELLS MAY BE ABLE TO PRODUCE LARGE HAIL...DAMAGING WINDS AND EVEN A FEW TORNADOES BY LATE FRIDAY AFTERNOON NORTHWEST OF A LINE FROM IOWA CITY...TO DUBUQUE. THESE INDIVIDUAL STORMS ARE THEN EXPECTED TO BECOME A LARGER COMPLEX OF STORMS PRODUCING DAMAGING STRAIGHT LINE WINDS AS THEY SPREAD ACROSS THE REST OF THE AREA THROUGH FRIDAY NIGHT. THESE STORMS WILL ALSO HAVE THE POTENTIAL TO PRODUCE LOCALLY HEAVY RAIN AND FLASH FLOODING. THE STORM PREDICTION CENTER HAS PLACED THE ENTIRE AREA UNDER A SLIGHT RISK OF SEVERE WEATHER FRIDAY AND FRIDAY NIGHT. BEFORE THE STORMS ARRIVE...TEMPERATURES AROUND 90 DEGREES WITH HIGH HUMIDITY WILL PRODUCE VERY UNCOMFORTABLE HEAT INDICES IN THE MID TO UPPER 90S. PORTIONS OF THE OUTLOOK AREA WILL CONTINUE TO BE UNDER THE GUN FOR MORE ROUNDS OF THUNDERSTORMS FROM SATURDAY THROUGH AT LEAST NEXT MONDAY. MUCH WILL DEPEND ON WHERE A WEST-TO-EAST ORIENTED FRONTAL BOUNDARY ALIGNS ITSELF DURING THIS PERIOD THAT WILL ALLOW CERTAIN AREAS TO EXPERIENCE MORE THUNDERSTORM ACTIVITY THAN OTHERS. WITH A VERY WARM AND HUMID AIRMASS REESTABLISHING ACROSS THE REGION THROUGH THE WEEKEND...SOME STORMS MAY BECOME SEVERE WITH DAMAGING WINDS BEING THE PRIMARY THREAT. ALSO...THESE THUNDERSTORM COMPLEXES WILL PRODUCE VERY HEAVY RAINFALL AND MAKE AREAS SUSCEPTIBLE TO FLASH FLOODING. REPEATED ROUNDS OF HEAVY RAINFALL THROUGH EARLY NEXT WEEK WILL AGGRAVATE ONGOING RIVER FLOODING SITUATIONS...OR CREATE NEW ONES. .SPOTTER INFORMATION STATEMENT... AN EMERGENCY MANAGERS CONFERENCE CALL WILL BE CONDUCTED AT 11 AM THIS MORNING. SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS EVENING...AND AGAIN FRIDAY AFTERNOON AND EVENING. HAASE
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
954 PM CDT THU JUN 17 2010
IAZ040-041-051-052-063-064-180345-
DELAWARE IA-BUCHANAN IA-BENTON IA-LINN IA-IOWA IA-JOHNSON IA-
954 PM CDT THU JUN 17 2010
...THUNDERSTORMS ARRIVING BEFORE MIDNIGHT...
A LINE OF STRONG TO SEVERE THUNDERSTORMS MOVING OUT OF NORTH
CENTRAL IOWA WILL MOVE INTO BUCHANAN...DELAWARE...BENTON AND LINN
COUNTIES BETWEEN 11 PM AND MIDNIGHT. BY MIDNIGHT THE LINE OF STORMS
IS EXPECTED TO EXTEND FROM NEAR MANCHESTER SOUTHWEST THROUGH CEDAR
RAPIDS AND MARENGO.
WIND GUSTS AS HIGH AS 60 MPH AND HAIL ONE INCH IN DIAMETER WILL BE
POSSIBLE WITH THESE STORMS. LOCALLY HEAVY RAIN WILL ALSO OCCUR AND
MAY RESULT IN STREET FLOODING AND PONDING OF WATER ON ROAD SURFACES.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 300 AM CDT FRIDAY
MORNING FOR EASTERN IOWA AND NORTHWEST ILLINOIS.
&&
LAT...LON 4230 9114 4229 9137 4161 9137 4142 9141
4145 9151 4151 9153 4152 9230 4229 9229
4230 9207 4246 9207 4248 9210 4261 9207
4263 9114
DLFThe La Crosse radar (KARX), 138 km away, was scanning. The volume nearest the first event began at 04:49 UTC.
1 thunderstorm wind, 1 lightning. Local standard time, as filed.
Wind gusts estimated to be 65 mph blew down a tree in Backbone State Park blocking a road around 1150 pm June 17. This report was relayed by the Delaware County Sheriffs Office.
Lightning struck a man in Burlington, IA around 1200 am June 18. The victim sustained minor injuries. This report was confirmed by hospital personnel.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, June 2010
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: 238948, 238951.