Repeated heavy rains caused minor to moderate flooding on the West Fork Ditch in Woodbury County in northwest Iowa from June 15th through June 23rd. Agricultural land and a few roads were flooded.
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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 FSD wrote it up.
Repeated heavy rains caused minor to moderate flooding on the West Fork Ditch in Woodbury County in northwest Iowa from June 15th through June 23rd. Agricultural land and a few roads were flooded.
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 Sioux Falls, SD wrote its last area forecast discussion before the first event at Jun 15, 5:15 PM CST, 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 615 PM CDT SUN JUN 15 2014 .SHORT TERM...(THIS EVENING THROUGH MONDAY) ISSUED AT 318 PM CDT SUN JUN 15 2014 SHOULD SEE QUIET WEATHER THIS EVENING INTO MOST OF TONIGHT WITH A WESTERLY BREEZE AND SCATTERED CUMULUS DISSIPATING THIS EVENING. SURFACE WINDS TURN SOUTHERLY HEADING TOWARDS MIDNIGHT AND THE EARLY MORNING HOURS...INCREASING ONCE AGAIN ACROSS SOUTH CENTRAL SOUTH DAKOTA WHERE THE LOW LEVEL JET IS EXPECTED TO PICK UP LATE TONIGHT. THE SOUTHERLY WINDS BEGIN TO TAP INTO INCREASED MOISTURE...AND AT THE VERY LEAST SOME MID AND HIGH CLOUDS ACROSS OUR WEST. MODELS BRING A SHORTWAVE TROUGH NORTHEAST INTO THE SANDHILLS REGION OF NEBRASKA TOWARDS DAYBREAK...POSSIBLY TRIGGERING SOME SCATTERED ELEVATED CONVECTION ENHANCED BY THE LOW LEVEL JET. IF IT DEVELOPS...THIS ACTIVITY MAY LIFT INTO SOUTH CENTRAL SOUTH DAKOTA...MAINLY WEST OF THE JAMES RIVER THROUGH MID MORNING. IF STORMS DO MANAGE TO PUSH OUR WESTERN THIRD...THE QUESTION IS HOW FAR EAST THESE STORMS HOLD TOGETHER INTO THE LATE MORNING AND EARLY AFTERNOON. INCREASED LOW AND MID LEVEL MOISTURE CONTINUES WORKING ACROSS THE AREA THROUGH THE DAY...WITH DEW POINTS REACHING THE LOW 70S NEAR THE MISSOURI VALLEY AND NORTHWEST IOWA. MODEL SOUNDINGS SUGGEST STRONG INSTABILITY...STEEP LAPSE RATES APPROACHING 10...AND 40 KT + OF SHEAR WITH A VEERING PROFILE SPREAD EAST THROUGH THE FORECAST AREA DURING THE DAY. THE BIG QUESTION IS HOW THE EARLIER CONVECTION MAY OR MAY NOT EFFECT CONDITIONS LATER IN THE DAY. IF STORMS IN THE WEST HOLD TOGETHER THROUGH MUCH OF THE MORNING...CLOUDS COULD LIMIT HEATING AND THEREFORE INSTABILITY WOULD BE REDUCED. WITH THE SHORTWAVE TRACKING THROUGH THE AREA AND WARM FRONT NEAR THE MISSOURI...SHOWERS AND THUNDERSTORMS BECOME MORE LIKELY IN THE LATER HALF OF THE DAY IN THE I29 CORRIDOR AND EASTWARD. MODEST CAPPING WILL BE IN PLACE...BUT FULLY HEATING OUT COULD OVERCOME THE CAPPING IN THE LATE AFTERNOON...ESPECIALLY NEAR OUR SOUTHERN BORDER. DISCRETE SUPERCELLS ARE POSSIBLE ESPECIALLY IN THE AFTERNOON AND EVENING WITH STRONG SHEAR SUPPORTIVE OF VERY LARGE HAIL. A FEW TORNADOES ARE ALSO POSSIBLE NEAR THE BOUNDARY. HEAVY RAIN AGAIN IS A CONCERN IN AREAS WHERE RECENT HEAVY RAINFALL HAS FALLEN AS PRECIPITABLE WATER VALUES APPROACH 2 INCHES. MAY NEED TO ISSUE A FLASH FLOOD WATCH IN THE FUTURE. .LONG TERM...(MONDAY NIGHT THROUGH SUNDAY) ISSUED AT 318 PM CDT SUN JUN 15 2014 WHILE TUESDAY WILL HAVE A VERY HIGH CONDITIONAL PROBABILITY OF SEVERE WEATHER THE ACTUAL THREAT WILL LIKELY BE NEGATED BY A STRONG CAP. PLENTY OF INSTABILITY WITH MARGINAL SHEAR WOULD EASILY SUPPORT SEVERE THUNDERSTORMS. WILL KEEP CHANCES MAINLY NORTH OF INTERSTATE 90 BUT IF CAP STRENGTH CONTINUES TO LOOK STRONG AND UPPER LEVEL SUPPORT STILL LOOKS TO GO TO THE NORTH MAY JUST NEED TO REMOVE POPS AT SOME POINT. OTHERWISE...WITH A WEAK BOUNDARY LINGERING AROUND IN THE NORTHERN CWA OTHER THAN NORTHWEST IOWA WINDS WILL LIKELY BE LESS THAN 15 MPH THROUGH THE DAY. AND WITH ALL OF THE RAIN THE PAST FEW DAYS AND THE WEAK MOISTURE CONVERGENCE NEAR THE SURFACE WE COULD HAVE OUR FIRST FAIRLY HUMID DAY. CAPPING CONTINUES TO BE A PROBLEM ON WEDNESDAY HOWEVER A MUCH STRONGER WAVE SHOULD PROVIDE ENOUGH FORCING TO AT LEAST ALLOW THUNDERSTORMS TO DEVELOP AND PROPAGATE INTO THE AREA. ONCE AGAIN PLENTY OF INSTABILITY FOR A FEW SEVERE THUNDERSTORMS...ESPECIALLY IN THE EASTERN CWA SO WILL NEED TO KEEP AN EYE ON THIS POTENTIAL. WILL AIM FOR 85 TO 90 OVER THE EASTERN CWA AHEAD OF THE BOUNDARY WITH VERY HUMID CONDITIONS AGAIN. IN THE OUTER PERIODS (THURSDAY THROUGH SUNDAY)...THE MODELS ARE NOT OVERLY AGREEABLE AS THEY ARE HAVING TROUBLE WITH THE EJECTING TROUGH. AS DISCUSSED YESTERDAY...THE MODELS...ESPECIALLY IN THE EXTENDED PORTION OF THE FORECAST...HAVE A LOT OF TROUBLE WITH CUT OFF LOWS. THE GEM AND GFS CUT THE LOW OFF AND KEEP CONDITIONS A LITTLE LESS WARM AND BREEZY THROUGH THE PERIOD WHILE THE ECMWF ALLOWS THE LOW TO TRANSITION OVER THE WEAK RIDGE AND THEN A STRONGER RIDGE BUILDS ONTO THE PLAINS THROUGH THE WEEKEND. THIS IS A DIFFERENCE OF 5 TO 10 DEGREES AT 850MB WHICH IS SIGNIFICANT. WITH THE GFS ENSEMBLE LEANING TOWARD THE WARMER ECMWF AND THE ECMWF ENSEMBLE OUTPUT ALSO SUPPORTS THE WARMER ECMWF SO WILL LEAN A LITTLE WARMER THAN GUIDANCE FOR THE WEEKEND. NOT REAL CONFIDENT GIVEN THE COOL PATTERN THAT SEEMS TO CONTINUOUSLY REDEVELOP BUT RIGHT NOW THE SIGNALS ARE NOT THERE TO GO COOLER. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z MONDAY EVENING) ISSUED AT 614 PM CDT SUN JUN 15 2014 MAIN CONCERN FOR TAFS WILL BE THUNDERSTORMS. THROUGH 12Z...EXPECT VFR CONDITIONS. GUSTY WINDS EARLY THIS EVENING WILL RAPIDLY DECREASE TO AROUND 10 KTS AND BACK TO SOUTHEAST DURING THE NIGHT. SHORTLY AFTER DAWN MONDAY...EXPECT SCATTERED THUNDERSTORMS TO DEVELOP IN CENTRAL SD AND BEGIN TO MOVE EAST AND NORTHEAST. AM CONFIDENT ENOUGH THAT CONVECTION WILL DEVELOP NORTH OF THE MISSOURI RIVER TO INCLUDE A TEMPO GROUP FOR THUNDERSTORMS IN BOTH KHON...FROM 13Z TO 15Z...AND KFSD FROM 14Z TO 17Z. DID INCLUDE MVFR CONDITIONS WITH STORMS IN KFSD BUT NOT IN KHON. WITH EXPECTED COLD POOL DID KEEP WINDS SE MUCH OF THE DAY WITH BKN CIGS AROUND 5000 FT. FOR KSUX...LESS CONFIDENT ON THUNDERSTORMS EARLY IN THE DAY AND NOT CONFIDENT WHEN OR WHERE REDEVELOPMENT WILL BE IN LATE AFTERNOON SO DID NOT INCLUDE THUNDERSTORMS AT THIS TIME. WINDS WILL BE MORE SOUTHERLY AND STRONGER DURING THE DAY ON MONDAY. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM... LONG TERM...08 AVIATION...SCHUMACHER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 1053 AM CDT SUN JUN 15 2014 IAZ001>003-012>014-020>022-031-032-MNZ072-080-081-089-090-097-098- NEZ013-014-SDZ062-067-070-071-161000- LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-PLYMOUTH-CHEROKEE- BUENA VISTA-WOODBURY-IDA-MURRAY-COTTONWOOD-NOBLES-JACKSON- PIPESTONE-ROCK-DIXON-DAKOTA-MINNEHAHA-LINCOLN-UNION- 1053 AM CDT SUN JUN 15 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST IOWA...SOUTHWEST MINNESOTA...NORTHEAST NEBRASKA AND SOUTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT AREA RIVERS AND STREAMS CONTINUE TO RUN VERY HIGH OR IN FLOOD STAGE AFTER RECENT HEAVY RAINFALL AND THE FAILURE OF THE LOWER DAM AT BLUE MOUND STATE PARK. FLOOD WARNINGS REMAIN IN EFFECT FOR PORTIONS OF THE BIG SIOUX...SPLIT ROCK CREEK...PIPESTONE CREEK...THE ROCK RIVER...THE LITTLE SIOUX AND WEST FORK DITCH UNTIL AT LEAST TUESDAY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS THE AREA ON MONDAY. IN ADDITION TO PRODUCING LARGE HAIL UP TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH...THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. VERY WARM AND MUGGY CONDITIONS ARE EXPECTED ON TUESDAY. HEAT INDICIES WILL GENERALLY RANGE FROM 95 TO 100 DEGREES...WITH THE HIGHEST VALUES ACROSS NORTHWEST IOWA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. MNZ071-SDZ038>040-050-052>061-063>066-068-069-161000- LINCOLN-BEADLE-KINGSBURY-BROOKINGS-GREGORY-JERAULD-SANBORN-MINER- LAKE-MOODY-BRULE-AURORA-DAVISON-HANSON-MCCOOK-CHARLES MIX-DOUGLAS- HUTCHINSON-TURNER-BON HOMME-YANKTON- 453 AM CDT SUN JUN 15 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHWEST MINNESOTA...EAST CENTRAL SOUTH DAKOTA...SOUTH CENTRAL SOUTH DAKOTA AND SOUTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORMS ARE EXPECTED TO REDEVELOP ACROSS THE AREA ON MONDAY. IN ADDITION TO PRODUCING LARGE HAIL UP TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 60 MPH...THESE STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL. VERY WARM AND MUGGY CONDITIONS ARE EXPECTED ON TUESDAY. HEAT INDICIES WILL GENERALLY RANGE FROM 90 TO 95 DEGREES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
423 PM CDT SUN JUN 15 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0422 AM FLASH FLOOD STORM LAKE 42.65N 95.20W
06/15/2014 BUENA VISTA IA NEWSPAPER
NUMEROUS STREETS FLOODED IN TOWN. BASEMENTS ALSO FLOODED.
&&
PSPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE SIOUX FALLS SD
425 PM CDT SUN JUN 15 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 AM FLASH FLOOD STORM LAKE 42.65N 95.20W
06/15/2014 BUENA VISTA IA NEWSPAPER
NUMEROUS STREETS FLOODED IN TOWN. BASEMENTS ALSO FLOODED.
&&
PSThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Repeated heavy rains caused Flooding on the West Fork Ditch, ranging from minor near Moville, to moderate near Hornick. Agricultural land and a few roads were flooded. The stream crested at 2.69 feet above flood stage near Moville and 3.59 feet above flood stage near Hornick, both on June 17th.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2014Every state in 2014This day in weather historyWarnings in Iowa, June 2014
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: 524580.