Thunderstorms produced damaging wind gusts at several locations in northwest Iowa on the morning of June 15th.
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 FSD wrote it up.
Thunderstorms produced damaging wind gusts at several locations in northwest Iowa on the morning of June 15th.
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, 5:35 AM CST, 3 hours 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SIOUX FALLS SD 635 AM CDT SAT JUN 15 2013 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 341 AM CDT SAT JUN 15 2013 MAIN CHALLENGE TODAY IS OF COURSE SHOWER/THUNDERSTORM CHANCES. AT THIS TIME...SURFACE FRONT IS DRAPED CLOSE TO THE I 29 CORRIDOR AROUND BROOKINGS TO SIOUX FALLS...EXTENDING SOUTHWEST INTO NORTH CENTRAL NEB. THIS BOUNDARY CONTINUES A TREK SOUTHWARD AND WILL LIKELY BE THROUGH THE ENTIRE FORECAST AREA BY 12Z SATURDAY. THEREFORE WITH THE SURFACE BOUNDARY SLIDING SOUTHWARD...BELIEVE THUNDERSTORM CHANCES TODAY WILL BE ELEVATED CLOSER TO THE 850MB BOUNDARY. THERE IS ALSO A SHORT WAVE CURRENTLY IN CENTRAL NEBRASKA. THE SMALL CONVECTIVE ACTIVITY WHICH WAS IN SOUTH CENTRAL NEB RECENTLY HAS DIED OFF. BUT MORE STORMS CONTINUE TO FIRE NEAR THE SHORT WAVE IN WEST CENTRAL NEBRASKA...ALSO PLACED NICELY ON THE 850MB BOUNDARY. VARIOUS HIRES MODELS HAVE THE 850MB SHEAR ZONE SETTING UP SHOP IN OUR FAR SOUTHERN ZONES ROUGHLY FROM NEAR SIOUX CITY TO STORM LAKE. BELIEVE THAT WILL BE THE FOCUS FOR CONTINUED SHOWER AND THUNDERSTORM CHANCES FOR MUCH OF THE DAY BEFORE THE ELEVATED BOUNDARY ALSO SHIFTS SOUTHWARD BY 00Z SUNDAY. INSTABILITY IS NOT REAL STRONG...MARKED BY QUITE A BIT OF CIN IN THE MIXED LAYER UNDERSCORING THE ELEVATED NATURE OF THE CONVECTION. THEREFORE NOT REAL CONCERNED ABOUT SEVERE WEATHER. LOCALLY MODERATE TO HEAVY RAIN COULD BE A POSSIBILITY THOUGH...JUST NORTH OF THE 850MB FRONT IN NORTHWEST IA...ESPECIALLY IF THE ACTIVITY CONTINUES TO REDEVELOP. BUT AT THIS TIME...NOT CONVINCED THE RAIN WILL BE HEAVY ENOUGH TO WARRANT A FLOOD WATCH. MAX TEMPERATURES TODAY ARE ALSO A BIT OF A CHALLENGE DUE TO WHAT WILL LIKELY BE EXTENSIVE CLOUD COVER FOR A GOOD PORTION OF THE DAY...AT LEAST IN THE SOUTHERN HALF OF OUR AREA. THEREFORE SOME OF THE WARMER GUIDANCES LIKE THE MAV DID NOT LOOK REAL GOOD AND TRENDED TOWARD THE COOLER CONSENSUS VALUES. ANY PRECIPITATION CHANCES DROP OFF QUICKLY BY THIS EVENING AS THE MIDLEVEL SHORTWAVE AND 850 MB BOUNDARY SLIDE OFF TO THE SOUTH AND EAST. WITH CLEARING SKIES...LIGHT WINDS...AND WEAK COLD AIR ADVECTION...LOWS WILL BE SEASONABLY PLEASANT IN THE MID AND UPPER 50S. .LONG TERM...(SUNDAY THROUGH FRIDAY) ISSUED AT 341 AM CDT SAT JUN 15 2013 ON SUNDAY...SURFACE RIDGE AXIS OVER OUR AREA SLIDES OFF TO THE EAST...WITH A SOUTHERLY RETURN FLOW ON THE BACKSIDE OF THE HIGH. ALSO BEGIN TO SEE INSTABILITY AND WEAK TO MODERATE MOISTURE TRANSPORT BACK INTO WESTERN AND CENTRAL SOUTH DAKOTA...IN CONJUNCTION WITH A WEAK SHORTWAVE TRACKING FROM WESTERN SOUTH DAKOTA INTO EASTERN NEBRASKA DURING THE DAY. THIS COLLOCATED WITH WEAK UPPER LEVEL SUPPORT OFFERED BY A JET STREAK EXTENDING FROM WESTERN NORTH DAKOTA INTO SOUTHERN MINNESOTA...MAY BE ENOUGH TO KICK OFF SOME CONVECTION IN OUR WEST DURING THE AFTERNOON. MODELS HINTING THAT SOME OF THIS CONVECTION COULD TRACK ACROSS OUR NORTH ALONG A WEAK INSTABILITY AXIS LYING THROUGH THAT AREA...THOUGH CONFIDENCE IS LOW...AND KEPT WITH ONLY SMALL CHANCE POPS OVER THAT AREA IN THE LATER AFTERNOON. SEVERE CHANCES LOOK TO BE ONLY MARGINAL AT THIS POINT WITH RATHER UNIMPRESSIVE SHEAR AND CAPE VALUES. WILL HAVE WARMING THERMAL PROFILES ON SUNDAY...YIELDING HIGHS INTO THE LOWER 80S ACROSS THE AREA. KEEP SMALLISH POPS OVER THE AREA ON SUNDAY NIGHT AS A COLD FRONT DROPS SOUTHWARD THROUGH THE REGION. LOWS LOOK TO BE UPPER 50S TO LOWER 60S. THE FRONTAL BOUNDARY WILL PULL AWAY FROM THE AREA ON MONDAY WITH HIGH PRESSURE BUILDING INTO THE REGION THROUGH TUESDAY. THIS WILL BRING DRY CONDITIONS WITH PLEASANT TEMPERATURES BOTH DAYS...IN THE 70S TO NEAR 80 DURING THE AFTERNOON...WITH LOWS IN THE 50S ON MONDAY NIGHT. SURFACE HIGH PRESSURE PULLS AWAY LATER ON TUESDAY...WITH A SOUTHERLY FLOW RETURNING TO THE REGION FOR WEDNESDAY INTO FRIDAY AS AN UPPER LEVEL RIDGE BUILDS INTO THE PLAINS STATES. THIS WILL LEAD TO SUBTLE WARMING EACH DAY...AND SOMEWHAT MORE HUMID CONDITIONS WITH INCREASING LOW LEVEL MOISTURE. AS MOISTURE TRANSPORT AND INSTABILITY RETURN TO THE REGION...WILL SEE INCREASING CHANCES OF CONVECTION FOR WEDNESDAY NIGHT INTO FRIDAY. HIGHS WILL BE IN THE 80S WITH LOWS IN THE 60S. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SUNDAY MORNING) ISSUED AT 634 AM CDT SAT JUN 15 2013 SHOWERS AND THUNDERSTORMS WILL MOVE EASTWARD TODAY...ESPECIALLY THROUGH EARLY TO MID AFTERNOON...ALONG OUR FAR SOUTHERN ZONES NEAR THE MISSOURI RIVER VALLEY CORRIDOR. TO THE NORTH OF THAT AREA... THUNDERSTORM CHANCES WILL DECREASE DRAMATICALLY. DESPITE THE RAIN... THE CONVECTION IS ELEVATED...THEREFORE AM ANTICIPATING THAT VFR CONDITIONS WILL BE THE PRIMARY CATEGORY TODAY THROUGHOUT THE SIOUX FALLS FORECAST AREA...EVEN IN THE SOUTHERN ZONES. TONIGHT SHOULD SEE DRY CONDITIONS HOWEVER WITH LIGHT WINDS...AM A BIT CONCERNED ABOUT RADIATIONAL FOG HERE AND THERE. FOR NOW...LEFT OUT OF THE TAF SITES EXCEPT FOR A MENTION OF MVFR FOG LATE TONIGHT FOR KSUX. && .FSD WATCHES/WARNINGS/ADVISORIES... SD...NONE. MN...NONE. IA...NONE. NE...NONE. && SHORT TERM...MJF/JM LONG TERM...JM AVIATION...MJF
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SIOUX FALLS SD 445 AM CDT SAT JUN 15 2013 SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098- IAZ001>003-012>014-020>022-031-032-NEZ013-014-161200- AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA- CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE- DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON- IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN- LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN- OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN- SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON- 445 AM CDT SAT JUN 15 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA... SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA. .DAY ONE...TODAY AND TONIGHT THUNDERSTORMS... THERE IS A GOOD CHANCE FOR THUNDERSTORMS TODAY SOUTH OF INTERSTATE 90...WITH RAPIDLY DECREASING CHANCES ALONG AND NORTH OF INTERSTATE 90. SEVERE STORMS ARE NOT EXPECTED. HOWEVER IF THUNDERSTORMS REDEVELOP OVER THE SAME AREAS IN THE LATE MORNING AND AFTERNOON...SOME LOCALIZED MODERATE TO HEAVY RAINFALL MAY OCCUR IN EXTREME SOUTHEAST SOUTH DAKOTA...EXTREME NORTHEAST NEBRASKA...AND IN NORTHWEST IOWA. FLOODING... PARTS OF THE LITTLE SIOUX RIVER AROUND THE LINN GROVE AREA WILL RECEIVE MINOR FLOODING FOR THE NEXT FEW DAYS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY THERE IS A CHANCE FOR THUNDERSTORMS ACROSS THE AREA...MOVING FROM WEST TO EAST SUNDAY AFTERNOON AND SUNDAY NIGHT. SEVERE STORMS ARE NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY NOT BE NEEDED TODAY AND TONIGHT. && FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.WEATHER.GOV/SIOUXFALLS. THIS INCLUDES THE GRAPHICAL HAZARDOUS WEATHER OUTLOOK.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
823 AM CDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0812 AM TSTM WND GST 4 SW YANKTON 42.85N 97.45W
06/15/2013 E60 MPH YANKTON SD TRAINED SPOTTER
&&
ADAMSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
849 AM CDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0820 AM TSTM WND GST 2 N YANKTON 42.92N 97.39W
06/15/2013 M56 MPH YANKTON SD ASOS
&&
ADAMSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
858 AM CDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0848 AM TSTM WND GST 5 NNW VERMILLION 42.85N 96.96W
06/15/2013 E50 MPH CLAY SD TRAINED SPOTTER
&&
ADAMSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
909 AM CDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0906 AM HAIL 10 N VERMILLION 42.93N 96.93W
06/15/2013 E0.25 INCH CLAY SD TRAINED SPOTTER
TORRENTIAL RAINFALL WITH AN INCH IN LESS THAN 30 MINUTES.
&&
ADAMSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1000 AM CDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0955 AM TSTM WND GST LE MARS 42.79N 96.17W
06/15/2013 M49 MPH PLYMOUTH IA AWOS
&&
ADAMSThe Sioux Falls radar (KFSD), 108 km away, was scanning. The volume nearest the first event began at 15:26 UTC.
4 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds caused tree damage, including a few trees blown down.
Thunderstorm winds caused tree damage, including large limbs blown down. The winds also blew down power lines.
Thunderstorm winds caused tree damage, including up to 6 inch diameter limbs blown down.
Thunderstorm winds caused tree damage, including several trees blown down. The winds also caused roof damage to homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2013Every state in 2013This day in weather historyWarnings in Iowa, June 2013
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: 455161, 455163, 455167, 455168.