Slow moving showers and thunderstorms moved across northeast Missouri during the mid to late morning of June 18. Rainfall totals of 1 to 3 inches resulted in flash flooding in parts of Clark 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 DVN wrote it up.
Slow moving showers and thunderstorms moved across northeast Missouri during the mid to late morning of June 18. Rainfall totals of 1 to 3 inches resulted in flash flooding in parts of Clark 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 Quad Cities, IA wrote its last area forecast discussion before the first event at Jun 18, 7:00 AM CST, 2 hours earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 800 AM CDT SAT JUN 18 2011 .UPDATE... BASED ON RADAR TRENDS THE PAST HOUR...THE NORTHERN EDGE OF THE MCS MOVING INTO ILLINOIS SHOULD MOVE EAST PER FORWARD PROPAGATING CORFIDI VECTORS. THE FCST HAS BEEN UPDATED TO REFLECT THIS INCREASED PRECIP ACTIVITY THROUGH 15Z. ATTENTION NOW TURNS TO THE MCS THAT HAS CROSSED THE MISSOURI RIVER INTO WESTERN IOWA. THERE IS A VERY RESPECTABLE MCV ASSOCIATED WITH IT AND PER THE RUC TRENDS WILL MOVE EAST NORTHEAST INTO SOUTHERN IOWA OVER THE NEXT SEVERAL HOURS. SFC OBS SHOW THE OUTFLOW BOUNDARY FROM THE MO/IL MCS RUNS JUST SOUTH OF HIGHWAY 34 FROM NEAR KLWD TO NEAR KFSW. THE QUESTION IS WILL THE WESTERN IA MCV BE ABLE TO TAKE ADVANTAGE OF THE LOW LEVEL CONVERGENCE PROVIDED BY THE BOUNDARY AND INITIATE CONVECTION. THE MCV ASSOCIATED WITH THE MO/IL MCS WILL CUT ACROSS THE SOUTHERN CWFA MID TO LATE MORNING WITH STRONG SUBSIDENCE BEHIND IT. THE 12Z UA SOUNDING HAS A VERY PRONOUNCED INVERSION WITH A CONVECTIVE TEMPERATURE OF 73. THE TRENDS FROM THE RUC SHOW PWATS WITH SPORADIC PEAK VALUES SHOWING UP AROUND MID DAY WHICH SUGGESTS CONVECTION IS DEVELOPING ACROSS THE AREA. LIFT TOOL SHOWS CONVERGENCE INCREASING BY MID DAY ACROSS SOUTHERN IOWA WITH IT GENERALLY HOLDING ACROSS THE SOUTH THIRD OF THE CWFA THROUGH MID AFTERNOON. THE CURRENT SCHC POPS FOR ISOLATED CONVECTION THIS AFTERNOON MAY BE A BIT UNDERDONE. INCOMING SHIFT WILL NEED TO DO A CAREFUL MET WATCH AND OBSERVE TRENDS REGARDING SUBSEQUENT UPDATES. ..08.. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 415 AM CDT SAT JUN 18 2011 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-190900- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO-CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL-HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA-JO DAVIESS IL-JOHNSON IA- JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA-MCDONOUGH IL-MERCER IL- MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL-SCOTLAND MO-SCOTT IA- STEPHENSON IL-VAN BUREN IA-WARREN IL-WASHINGTON IA-WHITESIDE IL- 415 AM CDT SAT JUN 18 2011 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 THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON WITH A BETTER CHANCE TONIGHT. ANY STORMS THAT DO DEVELOP WILL BE CAPABLE OF PRODUCING LOCALLY HEAVY RAINFALL. THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE STORMS FOR AREAS SOUTH OF INTERSTATE 80. THE PRIMARY THREATS APPEAR TO BE HAIL AND DAMAGING WINDS. SOME AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY SUNDAY THROUGH TUESDAY...EPISODES OF SHOWERS AND THUNDERSTORMS ARE POSSIBLE ACROSS THE OUTLOOK AREA. CURRENT INDICATIONS SUGGEST SOME STORMS MAY APPROACH OR BECOME SEVERE...MAINLY IN THE AFTERNOON AND EVENING HOURS WITH THE HIGHEST RISK TUESDAY AS A COOL FRONT PASSES. THE GREATEST RISK MAY BE LOCALIZED HEAVY RAINFALL. WET SOIL CONDITIONS...MAINLY ALONG AND SOUTH OF HIGHWAY 34...COULD RESULT IN ADDITIONAL RIVER FLOODING AND POSSIBLY FLASH FLOODING WITH ANY HEAVY RAINFALL OVER AN INCH IN LESS THAN AN HOUR. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MIGHT BE NEEDED FOR PORTIONS OF AREA THIS AFTERNOON AND EVENING. 08/NICHOLS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 529 AM CDT SAT JUN 18 2011 IAZ051>053-063>068-076>078-ILZ015-024-181300- BENTON-LINN-JONES-IOWA-JOHNSON-CEDAR-CLINTON-MUSCATINE-SCOTT- KEOKUK-WASHINGTON-LOUISA-ROCK ISLAND-MERCER- INCLUDING THE CITIES OF...VINTON...CEDAR RAPIDS...ANAMOSA... MARENGO...IOWA CITY...TIPTON...CLINTON...MUSCATINE...BETTENDORF... DAVENPORT...SIGOURNEY...WASHINGTON...WAPELLO...MOLINE... ROCK ISLAND...ALEDO 529 AM CDT SAT JUN 18 2011 ...PATCHY DENSE FOG ACROSS THE AREA... LIGHT WINDS COMBINED WITH HIGH MOISTURE IN THE LOWER ATMOSPHERE HAS ALLOWED PATCHY DENSE FOG TO DEVELOP THIS MORNING. VISIBILITIES IN THE FOG WERE NEAR ZERO AT TIMES AND ALSO CHANGE SUDDENLY OVER VERY SHORT DISTANCES. THE RISING SUN SHOULD RESULT IN THE FOG BURNING OFF BY 8 AM. UNTIL THEN MOTORISTS SHOULD EXERCISE CAUTION
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
557 AM CDT SAT JUN 18 2011
ILZ034-MOZ009-010-181215-
HANCOCK IL-CLARK MO-SCOTLAND MO-
557 AM CDT SAT JUN 18 2011
...THUNDERSTORMS WITH HEAVY RAIN AND GUSTY WINDS...
AT 550 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR HAD A LINE OF
STRONG STORMS EXTENDING FROM NEAR POLLOCK MISSOURI TO HANNIBAL
MISSOURI...MOVING EAST AT 40 MPH.
THESE STORMS WILL AFFECT AREAS ALONG AND SOUTH OF HIGHWAY 136
THROUGH 7 AM. HEAVY DOWNPOURS AND GUSTY WINDS TO 35 MPH WILL BE
POSSIBLE.
EXPECT PONDING OF WATER ON ROADS AND IN LOW-LYING AREAS...AND RISES
IN AREA STREAMS AND CREEKS.
&&
LAT...LON 4019 9127 4021 9151 4024 9151 4025 9195
4029 9196 4030 9196 4030 9235 4042 9235
4035 9092 4019 9091
08SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
959 AM CDT SAT JUN 18 2011
IAZ098-099-181545-
VAN BUREN IA-LEE IA-
959 AM CDT SAT JUN 18 2011
...THUNDERSTORMS WITH LOCALLY HEAVY RAIN POSSIBLE...
AT 950 AM A CLUSTER OF THUNDERSTORMS WAS PRODUCKING VERY
HEAVY RAINS OVER NORTHERN CLARK COUNTY MISSOURI. NATIONAL WEATHER
SERVICE DOPPLER RADAR WAS INDICATING THAT THESE STORMS WERE BEGINNING
TO DEVELOP NORTHWARD AND COULD SPREAD INTO THE
FARMINGTON...DONNELLSON AND VINCENNES AREAS BY 1030 AM.
IF THIS TREND CONTINUES THEN SOUTHWESTERN VAN BUREN COUNTY AND THE
SOUTHERN HALF OF LEE COUNTY COULD EXPERIENCE LOCALLY HEAVY RAINS
RESULTING IN THE PONDING OF WATER ON ROADS AND LOW LYING AREAS AND
THE FLOODING OF DITCHES AND SMALL STREAMS.
THE STORMS ARE EXPECTED TO DIMINISH BY NOON.
&&
LAT...LON 4089 9219 4090 9172 4081 9172 4081 9141
4070 9113 4061 9135 4055 9141 4053 9139
4038 9145 4042 9153 4045 9152 4047 9158
4051 9162 4054 9162 4055 9168 4058 9168
4061 9173 4060 9218
DLFThe Quad Cities radar (KDVN), 153 km away, was scanning. The volume nearest the first event began at 14:59 UTC.
1 flash flood. Local standard time, as filed.
Heavy rains caused some flash flooding along Highway C near Revere, MO during the morning of June 18.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Missouri in 2011Every state in 2011This day in weather historyWarnings in Missouri, June 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: 318554.