An area of thunderstorms formed over northeast Nebraska in an areas of strong theta-e advection. 3 inches.
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 DMX wrote it up.
An area of thunderstorms formed over northeast Nebraska in an areas of strong theta-e advection. Precipitable water values were only around 1.3 inches. CAPE was in the 1000 to 2000 J/kg range with a downdraft CAPE of 800 J/kg. The atmosphere was strongly sheared with about 50 kts of effective shear present. The area of storms raced east at 55 to 65 MPH. The storm produced high winds, as well as tree and power line damage, as it moved through Kossuth, Humboldt, and Wright Counties. Wright County was hardest hit with some structural damage done to homes west of Clarion.
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 Des Moines, IA wrote its last area forecast discussion before the first event at Jun 29, 2:37 AM CST, 2 hours 57 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 337 AM CDT SUN JUN 29 2014 ...SIGNIFICANT SEVERE WEATHER EVENTS POSSIBLE TODAY AND MONDAY... .SHORT TERM /TODAY/... ISSUED AT 337 AM CDT SUN JUN 29 2014 DYNAMIC SITUATION WITH THE STRONG LOW OVER SOUTHERN MANITOBA SETTING STAGE FOR A VERY FAST ZONAL FLOW OUT OF THE PACIFIC INTO IA. NEGATIVELY TILTED TROUGH IS PUSHING THROUGH THE STATE NOW AND YESTERDAY LINE OF CONVECTION AHEAD OF IT HAS EXITED THE REGION. NEW CONVECTION FORMING OVER NERN NEBRASKA INTO NWRN IA IS MORE IN RESPONSE TO APPROACHING JET. THESE ARE FORMING IN THE LEFT EXIT REGION AND ARE LIKELY TO HOLD TOGETHER FOR SOME TIME YET. TIMING ON DEVELOPMENT THIS AFTERNOON WILL DEPEND ON HOW MUCH SUN WE RECEIVE IT WON'T TAKE ALL THAT LONG TO WARM UP ENOUGH TO ERODE THE CAP. THINKING IS THAT THAT MAY OCCUR BY SHORTY AFTER 18Z. ONCE THE CONVECTION GOES...IS IS LIKELY TO MOVE TOWARD DEVELOPING INTO A COMPLEX FAIRLY QUICKLY. CONSIDERED GOING WITH AN FFA TODAY...BUT OPTED TO HOLD OFF ON THAT FOR NOW. FFG VALUES AREA ARE AROUND 1.5 INCHES IN MANY AREAS...BUT PWAT VALUES ARE SIGNIFICANTLY LOWER THAN THEY WERE YESTERDAY. IT ALSO LOOKS LIKE ONCE THE STORMS FORM THEY WILL BECOME MORE UPSCALE AND BECOME FORWARD PROPAGATING. FOR THIS REASON...IT APPEARS THE HEAVY PRECIPITATION WILL BE MORE ISOLATED IN NATURE TODAY. TEMPS A BIT TRICKY TODAY. WILL GO A LITTLE COOLER OVER THE NORTH DUE TO CLOUDS AND RAIN OFF AND ON THROUGH THE MORNING...ABOUT PERSISTENCE OVER THE CENTRAL AND SOUTH. .LONG TERM /TONIGHT THROUGH SATURDAY/... ISSUED AT 337 AM CDT SUN JUN 29 2014 FIRST AREA OF ONGOING SEVERE CONVECTION LIKELY TO BE MOVING INTO CENTRAL IOWA DURING THE EVENING HOURS AND LESSENING SOMEWHAT AFTER MIDNIGHT AS IT HEADS INTO SOUTHEAST IOWA. POTENTIAL FOR LOCALLY HEAVY RAINFALL TO LESSEN AS WELL SOUTHEAST/EAST OVERNIGHT AS SHORTWAVE IMPULSE AT H700/H850 MOVES EAST OF AREA BY 12Z BUT STILL EXPECT SOME RAINFALL TOTALS THIS EVENING/OVERNIGHT TO EXCEED AN INCH...THAT AFTER RAINFALL THIS AFTERNOON. STORMS EXPECTED TO CONTINUE POTENTIAL FOR LARGE HAIL AND DAMAGING THUNDERSTORM WINDS AS WARM CONVEYOR BELT INCREASES DURING THE OVERNIGHT HOURS. MAIN UPSTREAM SFC WAVE STILL SOUTHWEST OF AREA TONIGHT BUT FINALLY ARRIVES MONDAY WITH SFC FRONT FOCUSED ON CENTRAL IOWA DURING THE AFTERNOON HOURS. A LOT OF THINGS COMING TOGETHER TOMORROW FOR A SIGNIFICANT WIND/SEVERE AND RAINFALL EVENT. MODELS HINTING AT CONVECTION OVER WESTERN IOWA IN THE EARLY MORNING HOURS ONGOING AT 12-14Z ALONG OR NEAR SFC WARM FRONT OVER CENTRAL OR SOUTHERN IOWA. FRONT IS EXPECTED TO LIFT SLIGHTLY NORTH BY 18Z WITH WARM SECTOR GETTING INTO THE SOUTH QUARTER OF THE FORECAST AREA AS INSTABILITY INCREASES. THOUGH THEY MAY BE OVERDONE...GFS/NAM SHOWING 4000-5000 J/KG MUCAPE/SBCAPE IN THE WARM SECTOR OVER IOWA MONDAY AFTERNOON... EURO 2000-3000 J/KG MUCAPE. DOWNDRAFT CAPE PANS OUT TO 1150-1250 J/KG FROM DSM TO OTM. MEANWHILE A RELATIVELY STRONG MID LEVEL SHORTWAVE OVER THE DAKOTAS WILL QUICKLY MOVE EAST DURING THE DAY. AS THIS SYSTEM INTERACTS WITH THE SFC WAVE...VERY UNSTABLE AIRMASS...AND STRONGER SFC FLOW...A WIND PRODUCING MCS IS LOOKING MORE LIKELY TO DEVELOP OVER THE AREA. SOME UNCERTAINTY REMAINS AS TO THE LOCATION...BUT MOST OF THE MODELS SUGGEST OVER THE SOUTHEAST/SOUTH THIRD OF THE STATE NEAR THE WARM SECTOR AND SFC BOUNDARIES. UPPER LEVEL WIND FIELDS QUITE IMPRESSIVE MONDAY WITH THE EURO SHOWING A SW 30-40KT H850 LLJ DEVELOPING FROM 18Z- 00Z OVER CENTRAL/EASTERN IOWA. AT H700 40-50KT WIND FIELD AND AT H500/H300 50-70KT OVER IOWA WITH H300 MAX OF 80-100KT OVER THE IA/MN BORDER BY 00Z. THE GFS CONTINUES TO FOCUS HEAVY RAINFALL OVER SOUTHWEST WI WITH A MUCH STRONGER LOW DEVELOPING IN THE 24 HOUR PERIOD...THE GFS IS PROBABLY FOCUSING TOO MUCH ON THE SYNOPTIC SCALE WHILE THE EURO/NAM AND LESSER EXTENT GEM APPEAR TO BE MODELING THE MESOSCALE BETTER AND KEEPING THE HEAVY RAIN SIGNATURE FARTHER SOUTH. FOR NOW...WOULD FAVOR THE MORE SOUTHERN SOLUTION GIVEN THE TENDENCY FOR MESO SCALE CONVECTION TO WIN THE BATTLE. UNFORTUNATELY...THIS IS NOT GOOD NEWS FOR THE AREA. EURO/GFS LAYER FORWARD PROPAGATING CORFIDI VECTORS ARE ABOUT 35 TO 45 KTS WITH ANY EXPECTED MCS. THE OTHER MAIN CONCERN REMAINS... MOST OF THE AREA HAS SEEN SIGNIFICANT RAINFALL OVER THE PAST 5 DAYS. THE AIRMASS IN PLACE TODAY WILL STILL BE OVER IOWA TOMORROW. IN FACT...THE CHANNELING OF THE H850 FLOW TONIGHT/MONDAY WILL KEEP THE AREA IN A WELL DEFINED RIBBON OF 15C DEW POINTS FLOWING UP TOWARD THE MID MISSISSIPPI RIVER VALLEY/IOWA THROUGH MONDAY AFTERNOON. THIS WILL SUPPORT PRECIPITABLE WATER VALUES IN THE 2 TO 2.25 INCH RANGE MONDAY PRIOR TO THE TROUGH PASSAGE. WARM CLOUD DEPTHS ARE PUSHING 4000-4400M OR 13-14 KFT. WITH A VERY TROPICAL AIRMASS...HIGH RAINFALL RATES WILL ALSO BE POSSIBLE MONDAY AFTERNOON. A QUICK 2 TO 3+ INCH RAIN WOULD NOT BE OUT OF THE QUESTION WHERE THE MCS FORMS MONDAY AFTERNOON. WITH ADDITIONAL INFORMATION ABOUT MONDAYS MCS POTENTIAL LATER TODAY...BETTER DETAILS ABOUT THE LOCATION/TIMING WILL BE AVAILABLE THIS AFTERNOON. ONTO SOME BETTER NEWS...AS THE LARGE SYSTEM OVER CANADA PUSHES EAST AND PULLS THE FRONT OUT OF THE AREA...GENERALLY DRIER AND COOLER WEATHER IS EXPECTED FOR A GOOD SHARE OF THE WEEK. SOME RESIDUAL SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE NORTH ON TUESDAY AS A COLD POOL AND SECONDARY COOL FRONT DROPS SOUTH. BY WEDNESDAY THE COOLER AIR WILL BE IN PLACE WITH LINGERING SHOWERS POSSIBLE... BUT ONLY LIGHT RAIN IS EXPECTED BOTH DAYS. HIGH PRESSURE WILL ARRIVE FOR THURSDAY AND THE 4TH WITH DRY WEATHER EXPECTED THROUGH EARLY SATURDAY. HIGHS MONDAY WILL RANGE FROM THE MID/UPPER 80S SOUTHEAST TO THE MID 70S NORTH. BY TUESDAY TO THURSDAY...HIGHS WILL FALL BACK TO THE 70S WITH LOWS IN THE 50S TO LOWER 60S. INTO THE WEEKEND...SOME RECOVERY IS FORESEEN WITH HIGHS BACK IN THE 80S FRIDAY AND SATURDAY WITH LOWS IN THE 60S. && .AVIATION...29/06Z ISSUED AT 1124 PM CDT SAT JUN 28 2014 SYSTEM MOVING EAST FROM SD/NE WILL BRING ADDITIONAL SHRA/VCTS TO SITES NEAR 06Z BEFORE DIMINISHING. BEHIND SYSTEM WINDS WILL BE FROM THE SW WITH CLEARING SKIES. CLEAR SKIES AND LIGHT WINDS AROUND 12Z WITH AMPLE LOW LEVEL MOISTURE MAY ALLOW FOR BR/FG AT SITES WITH MVFR OR LOWER VISIBILITY AND CEILING REDUCTIONS POSSIBLE. BR AND CEILINGS SHOULD LIFT SHORTLY AFTER 12Z WITH VFR CONDITIONS AGAIN EXPECTED WITH STRONG SOUTHWESTERLY WINDS THROUGH THE DAY. ADDITIONAL CHANCES FOR TSRA AT SITES THROUGH THE AFTERNOON...AND HAVE INCLUDE VCTS MENTION ATTM DUE TO UNCERTAINTY IN TIMING AND LOCATION OF TSRA. && .HYDROLOGY... ISSUED AT 337 AM CDT SUN JUN 29 2014 LITTLE CHANGE IS ANTICIPATED OVER THE NEXT 36 HOURS...SOME LOCALLY HEAVY RAINFALL IS POSSIBLE TODAY AND TONIGHT WITH SOME OF THE STORMS OVER THE REGION. COVERAGE IS NOT ANTICIPATED TO BE WIDESPREAD AT THIS TIME...BUT LOCALIZED PONDING OF WATER AND STREET FLOODING COULD OCCUR. BY MONDAY...MORE WIDESPREAD HEAVY RAINFALL WILL BE POSSIBLE AS A STRONGER STORM AND STRONGER UPPER LEVEL WINDS COMBINE TO REALIZE THE HIGH MOISTURE CONTENT OF THE ATMOSPHERE. THE POTENTIAL FOR FLASH FLOODING IS MORE LIKELY MONDAY INTO THE EARLY EVENING. ANY ADDITIONAL RAINFALL WILL LIKELY STRESS RIVER LEVELS AND AREA STREAM BASINS...ESPECIALLY BY MONDAY EVENING AND INTO MID WEEK IF SIGNFICANT RAINFALL OCCURS. THIS WILL BE CLOSELY MONITORED OVER THE NEXT 36 HOURS. && .DMX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...MS LONG TERM...REV AVIATION...AWB HYDROLOGY...REV
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 414 AM CDT SUN JUN 29 2014 IAZ044>050-057>062-070>075-081>086-092>097-300915- CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE- DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN-MARION- MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-RINGGOLD- DECATUR-WAYNE-APPANOOSE-DAVIS- 414 AM CDT SUN JUN 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT FLOOD WARNINGS ARE IN EFFECT FOR PORTIONS OF THE DES MOINES RIVER...WEST FORK OF THE DES MOINES RIVER AND CEDAR RIVER BASINS ...PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT. WIDESPREAD DAMAGING WINDS...LARGE HAIL AND A FEW TORNADOES ARE ALL POSSIBLE THIS AFTERNOON AND EVENING. TONIGHT THE THREAT WILL MAINLY BE DAMAGING WINDS. VERY HEAVY RAINFALL WILL OCCUR WITH SOME OF THE STORMS AND LOCALIZED FLOODING OR ISOLATED FLASH FLOODING WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PERIODS OF THUNDERSTORMS ARE EXPECTED MONDAY. THERE IS CURRENTLY A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR MONDAY AND MONDAY EVENING OVER A PORTION OF THE OUTLOOK AREA. SIGNIFICANT DAMAGING WINDS...LARGE HAIL AND A FEW TORNADOES ARE ALL POSSIBLE MONDAY. MONDAY EVENING THE THREAT WILL MAINLY BE DAMAGING WINDS. VERY HEAVY RAINFALL WILL OCCUR WITH STORMS AND FLASH FLOODING WILL BE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON...TONIGHT AND POSSIBLY AGAIN MONDAY. IAZ004>007-015>017-023>028-033>039-300915- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK- 414 AM CDT SUN JUN 29 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT FLOOD WARNINGS ARE IN EFFECT FOR PORTIONS OF THE DES MOINES RIVER...WEST FORK OF THE DES MOINES RIVER AND CEDAR RIVER BASINS ...PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT. DAMAGING WINDS...LARGE HAIL AND A FEW TORNADOES ARE ALL POSSIBLE. TONIGHT THE THREAT WILL MAINLY BE DAMAGING WIND. VERY HEAVY RAINFALL WILL OCCUR WITH STORMS AND LOCALIZED FLOODING WILL BE POSSIBLE. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PERIODS OF THUNDERSTORMS ARE EXPECTED MONDAY. SOME OF THE STORMS MAY BE SEVERE MONDAY AND MONDAY EVENING. DAMAGING WINDS...LARGE HAIL AND A FEW TORNADOES ARE ALL POSSIBLE MONDAY. MONDAY EVENING THE THREAT WILL MAINLY BE DAMAGING WINDS. VERY HEAVY RAINFALL MAY OCCUR WITH STORMS AND FLASH FLOODING WILL BE POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON...TONIGHT AND POSSIBLY AGAIN MONDAY. REV
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
317 AM CDT SUN JUN 29 2014
IAZ033-044-045-290915-
CARROLL IA-CRAWFORD IA-SAC IA-
317 AM CDT SUN JUN 29 2014
...STRONG THUNDERSTORMS MOVING INTO WESTERN IOWA...
AT 316 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9
MILES NORTH OF DENISON...MOVING EAST AT 40 MPH.
DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
CARROLL...COON RAPIDS...GLIDDEN...SCHLESWIG...ARCADIA...BREDA...
VAIL...WESTSIDE...KIRON...DEDHAM...DELOIT...HALBUR...LIDDERDALE...
LANESBORO...WILLEY...RALSTON...SWAN LAKE STATE PARK...HOBBS COUNTY
PARK AND ARTHUR N NEU AIRPORT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
&&
LAT...LON 4221 9542 4221 9533 4224 9532 4219 9463
4186 9465 4186 9466 4208 9546
TIME...MOT...LOC 0816Z 282DEG 36KT 4215 9533
MS JUN 14SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
547 AM CDT SUN JUN 29 2014
IAZ015-023-291130-
PALO ALTO IA-POCAHONTAS IA-
547 AM CDT SUN JUN 29 2014
...STRONG THUNDERSTORMS MOVING ACROSS NORTHWEST IOWA...
AT 546 AM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5
MILES SOUTHWEST OF GREENVILLE...OR 12 MILES SOUTH OF SPENCER...MOVING
EAST AT 55 MPH.
DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
LOCATIONS IMPACTED INCLUDE...
EMMETSBURG...POCAHONTAS...LAURENS...SILVER LAKE...RUSH LAKE...FIVE
ISLAND LAKE...RUTHVEN...ROLFE...GILMORE CITY...MALLARD...PALMER...
AYRSHIRE...HAVELOCK...CYLINDER...PLOVER...CURLEW...RODMAN...
EMMETSBURG MUNICIPAL AIRPORT AND POCAHONTAS MUNICIPAL AIRPORT.
LAT...LON 4261 9444 4260 9444 4269 9492 4313 9491
4314 9449
TIME...MOT...LOC 1046Z 276DEG 46KT 4297 9523
MSThe Des Moines radar (KDMX), 135 km away, was scanning. The volume nearest the first event began at 11:32 UTC.
6 thunderstorm wind. Local standard time, as filed.
Numerous three to four inch diameter tree limbs were downed on Highway 169.
At least five trees eight inches in diameter were blown down.
A large tree was blocking part of the Highway. Power lines were snapped south of town. Damage also reported in St. Joseph.
Half of a roof was blown off of a house in Holmes. Many five inch diameter tree branches down in the area with power lines down as well.
Numerous power lines down causing a 3 hour power outage.
A four foot tree was down on a house and car in the 1000 block of S. Main St.
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: 515435, 515433, 515434, 515440, 515438, 515439.