Repeated heavy rains caused brief major flooding in the Alton area in eastern Sioux County in northwest Iowa. Mainly farmland and some 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 brief major flooding in the Alton area in eastern Sioux County in northwest Iowa. Mainly farmland and some 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 17, 5:27 AM CST, 33 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 627 AM CDT TUE JUN 17 2014 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 427 AM CDT TUE JUN 17 2014 LOW CONFIDENCE FORECAST FOR THE NEXT COUPLE OF DAYS...AS PRECIP CHANCES AND TEMPERATURES ARE LARGELY DEPENDENT ON EVENTUAL LOCATION OF BOUNDARIES...BOTH SYNOPTIC AND CONVECTIVE-DRIVEN. FOR TODAY... OUTFLOW FROM OVERNIGHT MCS HAS PUSHED WELL SOUTH THROUGH EASTERN NEBRASKA AND WESTERN IOWA AS OF 08Z...AND 00Z RUNS OF HIGH-RES ARW AND NMM BOTH SHOWED THIS BOUNDARY PUSHING INTO NORTHEAST KANSAS BY 12Z BEFORE DISSIPATING AND BEGINNING TO RETREAT NORTHWARD AGAIN THROUGH THE MORNING. COLD POOL IN THE WAKE OF THE MCS ALSO DRIVING GUSTY SOUTHERLY FLOW ACROSS NORTHWEST IOWA AS OF 08Z. SPEEDS IN THIS AREA ARE EXPECTED TO DIMINISH THROUGH THE EARLY MORNING...BUT THE SOUTHERLY DIRECTION SHOULD REMAIN DOMINANT...BECOMING REINFORCED BY LATE MORNING/MIDDAY AS THE OUTFLOW/WARM FRONT LIFTS BACK TO THE NORTH. PRIMARY QUESTIONS OF THE DAY ARE WHERE THIS BOUNDARY WILL WIND UP BY LATE AFTERNOON...AND WHETHER CAPPING INVERSION WILL BE BROKEN...EITHER THROUGH HEATING OR AS MID LEVEL WAVE LIFTS NORTHEAST OUT OF EASTERN COLORADO. BROAD MODEL CONSENSUS...ESPECIALLY FROM THE ABOVE MENTIONED HIGH-RES MODELS...POINTS TO THE BOUNDARY FROM FAR NORTHEAST NEBRASKA INTO KSPW/KMJQ VICINITY BY LATE EVENING. WOULD ANTICIPATE DEVELOPMENT IN WARM ADVECTION REGIME ALONG/NORTH OF THIS BOUNDARY...WHICH UNFORTUNATELY WOULD PLACE PRECIP CHANCES IN AREAS WHICH HAVE RECEIVED EXTENSIVE RAINFALL THE PAST FEW DAYS...FROM FAR SOUTHEAST SOUTH DAKOTA INTO NORTHWEST IOWA AND SOUTHWEST MINNESOTA. GIVEN UNCERTAINTY IN DEVELOPMENT...WILL KEEP POPS IN CHANCE RANGE FOR THE LATE AFTERNOON/EVENING...WITH ACTIVITY EXPECTED TO LIFT NORTHEAST OF THE AREA AFTER MIDNIGHT AS THE WAVE PASSES BY. SHEAR OVERALL APPEARS TO BE LOWER THAN THIS PREVIOUS AFTERNOON/EVENING... THOUGH WOULD BE LOCALLY ENHANCED NEAR BOUNDARIES...SO WOULD NOT EXPECT SIGNIFICANT TORNADO/WIND THREAT AWAY FROM THESE AREAS. GIVEN STEEP MID LEVEL LAPSE RATES. THOSE STORMS ABLE TO BREAK THE CAP...OR THAT FIRE ON THE ELEVATED BOUNDARY...WOULD HAVE A LARGE HAIL THREAT THOUGH. AGAIN...THIS SHOULD ALL WANE AFTER MIDNIGHT AS STORMS EXIT THE AREA TO THE NORTHEAST...WITH DRY CONDITIONS THEN EXPECTED THROUGH WEDNESDAY MORNING. ALTHOUGH LOCALLY HEAVY RAINS WOULD STILL BE POSSIBLE IF STORMS DEVELOP...OPTED TO FORGO ANOTHER FLASH FLOOD WATCH AT THIS TIME....SINCE AREA OF GREATEST CONCERN REMAINS UNDER AN AREAL FLOOD WARNING INTO THIS EVENING...AND THE THREAT IS ALSO CONDITIONAL ON DEVELOPMENT AND LOCATION...BOTH OF WHICH ARE QUITE UNCERTAIN. .LONG TERM...(WEDNESDAY THROUGH MONDAY) ISSUED AT 425 AM CDT TUE JUN 17 2014 WEDNESDAY IN SOME REGARDS IS EVEN MORE UNCERTAIN THAN TODAY...THOUGH DO STILL SEE POTENTIAL FOR GREATER STORM COVERAGE BY EVENING AND OVERNIGHT AS STRONGER WAVE ROTATES INTO THE AREA AROUND THE BASE OF THE UPPER LOW IN THE NORTHERN ROCKIES...SO WILL HANG ONTO CHANCE OF LATE AFTERNOON DEVELOPMENT ACROSS OUR NORTHEAST WHERE CAP WOULD BE WEAKEST...BUMPING TO LIKELY RANGE EAST OF THE COLD FRONT THROUGH THE OVERNIGHT AND INTO THURSDAY MORNING. SHEAR WEAKENS FURTHER THROUGH THE DAY...THOUGH CANNOT RULE OUT ISOLATED SEVERE THREAT GIVEN THE CONTINUED STEEL MID LEVEL LAPSE RATES ABOVE THE CAP. HEAVY RAINS COULD BECOME THE GREATER THREAT AGAIN WEDNESDAY NIGHT...ESPECIALLY WITH WHAT IS SURE TO BE EXTREME LOW FLASH FLOOD GUIDANCE. AS MENTIONED ABOVE...TEMPERATURES ALSO LARGELY DEPENDENT ON BOUNDARY LOCATIONS...AND WITH BOUNDARY TODAY EXPECTED TO BE FARTHER SOUTH THAN PREVIOUSLY THOUGHT...HAVE LOWERED HIGHS OVER MUCH OF THE AREA INTO THE LOWER TO MID 80S...KEEPING 90+ DEGREE READINGS CONFINED TO FAR SOUTH. SHOULD SEE WARMER AIR OVERSPREAD MORE OF THE AREA ON WEDNESDAY...THOUGH THIS AGAIN DEPENDENT ON WHETHER/WHERE DEVELOPMENT OCCURS THIS AFTERNOON/EVENING...AND WHERE ANY RESULTANT BOUNDARIES LAND BY WEDNESDAY AFTERNOON. COLD FRONT EXPECTED TO MOVE SLOWLY EAST ACROSS THE AREA THURSDAY...WITH TEMPERATURES RETURNING CLOSER TO NORMAL HIGHS IN THE LOWER 80S. HAVE NOT MADE MANY ALTERATIONS TO GUIDANCE GIVEN ACTIVE WEATHER FOR MUCH OF THE FIRST HALF OF THE OVERNIGHT. FOCUS IN THE EXTENDED CONTINUES TO BE ON SLOW MOVING UPPER LOW. THIS SYSTEM BEGINS TO THE NORTH OF THE FORECAST AREA...AND CONTINUES TO LIFT TO THE NORTHEAST THROUGH THE WEEKEND WITH RIDGE BUILDING INTO THE WEST. MODELS HAVE COME INTO BETTER AGREEMENT ON THE SYSTEM...AND ARE IN GENERAL FAVORING A SLOWER TIMING. WITH THAT IN MIND...LEFT GUIDANCE POPS IN THE NORTH AND EAST ON FRIDAY. WITH SYSTEM LIFTING AWAY...HAVE SIDED WITH A DRY FORECAST ON SATURDAY...BUT KEPT GUIDANCE POPS ON SUNDAY WITH MOIST ADIABATIC LAPSE RATES ALOFT LEADING TO WEAK AFTERNOON INSTABILITY. POTENTIAL FOR DRIER CONDITIONS LATER IN THE WEEKEND...BUT RIDGE APPEARS TO BE SOMEWHAT DIRTY WITH WEAK SHORTWAVES MEANDERING THROUGH. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z WEDNESDAY MORNING) ISSUED AT 627 AM CDT TUE JUN 17 2014 SPOTTY IFR-LIFR CEILINGS AND MVFR VISIBILITY IN THE WAKE OF OVERNIGHT CONVECTION IS EXPECTED TO DIMINISH BY 15Z. UNCERTAINTY LINGERS REGARDING EVOLUTION THROUGH THE REMAINDER OF THE DAY WITH SOME FORECAST MODELS SHOWING POTENTIAL FOR ISOLATED THUNDER REDEVELOPING NEAR AND NORTH OF A LOW LEVEL BOUNDARY WHICH IS FORECAST ACROSS NORTHWEST IOWA IN THE LATE AFTERNOON AND EVENING. GIVEN UNCERTAINTY OVER NOT ONLY LOCATION OF THE BOUNDARY...BUT ALSO WHETHER STORMS WILL FORM AT ALL...WILL NOT INCLUDE ANY MENTION OF THUNDER IN EITHER KFSD OR KSUX TAFS AT THIS TIME...BUT WILL BE MONITORED THROUGHOUT THE DAY. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...JH LONG TERM...JH/ AVIATION...JH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 554 AM CDT TUE JUN 17 2014 IAZ001>003-012>014-020>022-031-032-MNZ080-081-089-090-097-098- NEZ013-014-SDZ055-056-061-062-066-067-069>071-181100- LYON-OSCEOLA-DICKINSON-SIOUX-OBRIEN-CLAY-PLYMOUTH-CHEROKEE- BUENA VISTA-WOODBURY-IDA-MURRAY-COTTONWOOD-NOBLES-JACKSON- PIPESTONE-ROCK-DIXON-DAKOTA-LAKE-MOODY-MCCOOK-MINNEHAHA-TURNER- LINCOLN-YANKTON-UNION- 554 AM CDT TUE JUN 17 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHWEST IOWA...SOUTHWEST MINNESOTA...NORTHEAST NEBRASKA...EAST CENTRAL SOUTH DAKOTA AND SOUTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT WIDESPREAD RIVER AND OVERLAND FLOODING WILL CONTINUE THROUGH TODAY DUE TO ADDITIONAL HEAVY RAINFALL SINCE MONDAY AFTERNOON. IN ADDITION TO AREAL FLOOD WARNINGS ACROSS THE AREA THROUGH THIS EVENING...RIVER FLOOD WARNINGS REMAIN IN EFFECT FOR MANY RIVER AND CREEKS. THERE IS A CHANCE OF ADDITIONAL THUNDERSTORMS LATE THIS AFTERNOON AND EVENING...MAINLY ALONG AND NORTH OF HIGHWAY 18. IF STORMS ARE ABLE TO DEVELOP...THEY POSE A THREAT OF LARGE HAIL UP TO GOLF BALL SIZE...AS WELL AS WIND GUSTS TO 60 MPH AND AN ISOLATED TORNADO. LOCALLY HEAVY RAIN WOULD ALSO BE POSSIBLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE CHANCE OF THUNDERSTORMS WILL INCREASE WEDNESDAY AFTERNOON INTO WEDNESDAY NIGHT. SOME OF THESE STORMS COULD BECOME SEVERE...WITH ADDITIONAL AREAS OF HEAVY RAIN ALSO A CONCERN IN ALREADY FLOODED LOCATIONS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL BE POSSIBLE BETWEEN 3 PM AND MIDNIGHT. MNZ071-072-SDZ038>040-050-052>054-057>060-063>065-068-181100- LINCOLN-LYON-BEADLE-KINGSBURY-BROOKINGS-GREGORY-JERAULD-SANBORN- MINER-BRULE-AURORA-DAVISON-HANSON-CHARLES MIX-DOUGLAS-HUTCHINSON- BON HOMME- 554 AM CDT TUE JUN 17 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 THERE IS A CHANCE OF THUNDERSTORMS VERY LATE THIS AFTERNOON AND EVENING. IF STORMS ARE ABLE TO DEVELOP...THEY POSE A THREAT OF LARGE HAIL UP TO THE SIZE OF PING PONG BALLS...AS WELL AS WIND GUSTS TO 60 MPH. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THE CHANCE OF THUNDERSTORMS WILL INCREASE WEDNESDAY AFTERNOON INTO WEDNESDAY NIGHT. SOME OF THESE STORMS COULD BECOME SEVERE...WITH ADDITIONAL AREAS OF HEAVY RAIN ALSO A CONCERN IN ALREADY FLOODED LOCATIONS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
555 AM CDT TUE JUN 17 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0530 AM HEAVY RAIN ROUND LAKE 43.54N 95.47W
06/17/2014 M4.50 INCH NOBLES MN FIRE DEPT/RESCUE
THIS FELL IN A 5 HOUR PERIOD. HAS RECEIVED A TOTAL OF 10
INCHES SINCE SATURDAY MORNING.
&&
JHThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Repeated heavy rains caused major flooding in the Alton area. Farmland and some roads were flooded.
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: 524213.