A couple of funnel cloud reports were associated with a few weak storms that formed across central Iowa during the late afternoon. Zero to 3 km CAPE was very strong at around 150 to 200 J/kg with some surface vorticity in place.
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The episode as NWS DMX wrote it up.
A couple of funnel cloud reports were associated with a few weak storms that formed across central Iowa during the late afternoon. Zero to 3 km CAPE was very strong at around 150 to 200 J/kg with some surface vorticity in place. LCLs were low around 750 m and the Non-Supercell Tornado parameter had a 2 around south central Iowa.
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 14, 2:45 PM CST, 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 345 PM CDT SUN JUN 14 2015 .SHORT TERM /TONIGHT/... ISSUED AT 312 PM CDT SUN JUN 14 2015 SEVERAL THINGS WILL AFFECT THE FORECAST TONIGHT. FIRST A TROUGH OVER THE SOUTHERN PLAINS WILL CONTINUE TO EJECT WEAK SHORTWAVES ACROSS MAINLY THE SOUTHERN PORTION OF THE FORECAST AREA. COINCIDENT WITH THIS...AN OUTFLOW BOUNDARY FROM THE MORNING CONVECTION OVER THE NORTHERN PLAINS IS SLOWLY DROPPING SOUTHEAST AND WEAKENING. I BELIEVE IT WILL STILL IMPACT NEBRASKA AND A PART OF WEST CENTRAL INTO SOUTHWEST IOWA GIVEN THE MODEST INSTABILITY IN PLACE AND THE PASSING OF THESE SHORTWAVES ACROSS THE AREA. UNCAPPED CAPES OF AROUND 1000-1500 J/KG ARE FORECAST TO REMAIN ACROSS THE SOUTHERN HALF OF IOWA THROUGH MID EVENING AND GIVEN THE SCATTERED TO WIDELY SCATTERED NATURE OF THE STORMS ON RADAR CURRENTLY OVER MUCH OF THE REGION WE WILL HAVE NO TROUBLE CONVECTING SO THE PROBLEM WILL BE ONE OF TIMING. I EXPECT WE WILL SEE PERIODS OF SHOWERS/STORMS THROUGH PEAK HEATING INTO EARLY EVENING BEFORE A LULL. THANKFULLY SHEAR IS PATHETIC SO WE WILL NOT BE LOOKING AT A SEVERE POTENTIAL FROM THE EVENING CONVECTION BUT WARM CLOUD DEPTHS ARE WELL IN EXCESS OF 12K FT AND PWATS ARE IN EXCESS OF 1.75 INCHES. THESE SHOWERS/STORMS WILL BE EFFICIENT RAIN PRODUCERS. THIS WAS SHOWN BY THE BRIEF SHOWERS THAT PASSES OVER THE OFFICE AND PRODUCED .40 INCHES OF PRECIP IN 15 MINUTES. THE SCATTERED NATURE OF THE STORMS IS NOT PARTICULARLY CONCERNING FOR A FLOODING POTENTIAL BUT THIS WILL STILL NEED TO BE MONITORED...ESPECIALLY LATE TONIGHT WHEN A STRONGER WAVE APPEARS TO BE AFFECTING SOUTHEAST IOWA. LATE TONIGHT AND THROUGH THE OVERNIGHT ATTENTION TURNS TO THE NORTH AND WEST AS A COLD FRONT SAGS SOUTHEAST ACROSS THE AREA. THE FRONT SHOULD BE INTO THE NORTHWEST AROUND 06Z AND ABOUT HALF WAY THROUGH THE STATE BY 12Z. INSTABILITY ACROSS NORTHWEST IOWA AT 06Z IS PRETTY IMPRESSIVE WITH 1800 J/KG FORECAST BUT BY THE TIME THE FRONT GETS MUCH INTO THE FORECAST AREA IT OUTRUNS THE BEST INSTABILITY. THE BEST SHEAR REMAINS POST FRONTAL THROUGH TONIGHT SO WHILE THERE MAY BE AN ISOLATED STRONG WIND GUST ACROSS THE NORTHWEST...MOST OF THE STORMS SHOULD REMAIN BELOW SEVERE LIMITS. WARM CLOUD DEPTHS REMAIN ABOVE 12-13KFT WITH PWATS AOA 1.75 AT FORT DODGE, DES MOINES AND OTTUMWA SO THE HEAVIEST RAINFALL SHOULD BE IN THIS AREA...STILL FOCUSING ON SOUTHEAST IOWA AS THE MOST FAVORED. .LONG TERM /MONDAY THROUGH SUNDAY/... ISSUED AT 312 PM CDT SUN JUN 14 2015 A SHORTWAVE THROUGH WILL MOVE THROUGH IOWA MONDAY INTERACTING WITH A WEAK FRONTAL BOUNDARY. OCCASIONAL SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGHOUT THE DAY AIDED BY DAY TIME HEATING. THUNDERSTORMS WILL BE EFFECIENT RAIN PRODUCERS WITH PRECIPITABLE WATER VALUES NEAR 1.5 INCHES. LOCALIZED FLOODING WILL BE POSSIBLE NEAR STRONGER UPDRAFTS/DOWNDRAFTS AND WHERE THUNDERSTORMS MOVE OVER THE SAME AREAS. PRECIPITATION WILL TAPER FROM NORTHWEST TO SOUTHEAST ACROSS IOWA BY EARLY MONDAY EVENING. SURFACE HIGH PRESSURE BUILDS ACROSS MINNESOTA ON TUESDAY. MUCH OF CENTRAL IOWA WILL REMAIN DRY ON TUESDAY BUT THERE WILL STILL BE SLIGHT CHANCES FOR PRECIPITAITON ACROSS SOUTHERN IOWA WITH A WEAK FRONT AND DAY TIME HEATING AIDING DEVELOPMENT OF A FEW SHOWERS AND THUNDERSTORMS. A SHORTWAVE MOVING THROUGH THE STRONGER WESTERLIES ALOFT ON WEDNESDAY WILL NUDGE ANOTHER FRONT SOUTH INTO IOWA BRINGING YET ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS MID WEEK. THE UPPER RIDGE BUILDS ACROSS THE PLAINS AND THE MIDWEST LATE IN THE WEEK WITH THE PERSISTENT SUBTROPICAL HIGH PRESSURE PREVIOUSLY ANCHORED IN THE SOUTHEAST U.S. MOVING OFFSHORE. THE HEAT WILL BUILD IN THE PLAINS AND THE MIDWEST WITH A SURFACE LOW DEPENING IN THE DAKOTAS AND SOUTH AND SOUTHWEST FLOW RETURNING. SCATTERED THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTH CENTRAL IOWA LATE IN THE WEEK WITH SHORTWAVES MOVING THROUGH THE WESTERLY FLOW AROUND THE RIDGE. && .AVIATION...14/18Z ISSUED AT 100 PM CDT SUN JUN 14 2015 SCT SHRA SHOULD OCCUR OVER THE SOUTHERN TAF LOCATIONS THROUGH MUCH OF THE AFTERNOON WITH A POSSIBLE BREAK IN THE EARLY EVENING THEN CHANCES INCREASE TOWARDS 06Z. WE WILL HAVE AN UPPER LEVEL FEATURE PASS OVERNIGHT BRINGING A POTENTIAL FOR TSRA WITH HEAVY RAINFALL THEN LATE IN THE PERIOD A COLD FRONT WILL SAG SOUTH ACROSS TAF SITES. OCNL MVFR CONDITIONS WITH PERIODS OF RAIN AND THUNDERSTORMS ACROSS MAINLY SRN TAF LOCATIONS IS ABOUT THE EASIEST WAY TO SUM UP CONDITIONS THROUGH THIS TAF FORECAST PD. SFC WND WILL GENERALLY BE SOUTHERLY AT 5-15KTS SWITCHING TO THE W AND NW WITH THE FROPA FROM NW TO SE ACROSS THE STATE BEGINNING AFT 14Z. && .DMX WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...FAB LONG TERM...ANGLE AVIATION...FAB
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 350 PM CDT SUN JUN 14 2015 IAZ004>007-015>017-023>028-033>039-044>050-057>062-070>075- 081>086-092>097-152100- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-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- 350 PM CDT SUN JUN 14 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...THIS AFTERNOON AND TONIGHT SHOWERS AND NON SEVERE THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT. A FEW OF THE STORMS MAY PRODUCE BRIEF HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THERE WILL BE INTERMITTENT THUNDERSTORMS CHANCES THROUGH WEDNESDAY. AT THIS TIME THE THREAT OF SEVERE WEATHER IS LOW BUT LOCALLY HEAVY RAIN MAY ACCOMPANY SOME OF THE STORMS MONDAY AND WEDNESDAY. LOCALIZED FLOODING WILL BE POSSIBLE NEAR THE STRONGER THUNDERSTORMS AND WHERE STORMS TRACK OVER THE SAME AREAS. CHANCES FOR THUNDERSTORMS RETURN FRIDAY THROUGH SATURDAY. THERE WILL BE AN INCREASED RISK OF SEVERE THUNDERSTORMS LATE IN THE WEEK AND WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 307 PM CDT SUN JUN 14 2015 IAZ044>047-057>060-070>073-081>083-092>094-150015- CRAWFORD-CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE-DALLAS-POLK-CASS- ADAIR-MADISON-WARREN-ADAMS-UNION-CLARKE-TAYLOR-RINGGOLD-DECATUR- INCLUDING THE CITIES OF...DENISON...CARROLL...JEFFERSON...BOONE... AUDUBON...EXIRA...GUTHRIE CENTER...PANORA...BAYARD...CASEY... PERRY...WAUKEE...ADEL...DES MOINES...ATLANTIC...GREENFIELD... STUART...ADAIR...FONTANELLE...WINTERSET...EARLHAM...INDIANOLA... NORWALK...CARLISLE...CORNING...CRESTON...OSCEOLA...BEDFORD... LENOX...NEW MARKET...MOUNT AYR...LAMONI...LEON 307 PM CDT SUN JUN 14 2015 ...PONDING WATER POSSIBLE... SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS WITH MODERATE TO OCCASIONALLY HEAVY RAINFALL ARE EXPECTED TO CONTINUE OVER THE AREA THROUGH THE EARLY EVENING HOURS. RAINFALL RATES FROM THESE SHOWERS AND STORMS ARE ON THE ORDER OF NEARLY A HALF INCH IN TWENTY MINUTES. GIVEN THE RECENT RAINFALL AND ALREADY WET GROUND IN MANY LOCATIONS...SHOULD REPEATED OCCURRENCES OF SHOWERS AND STORMS FALL OVER THE SAME AREAS...PONDING OF WATER ON ROADWAYS AND IN DITCHES IS LIKELY. USE CAUTION IF YOU ENCOUNTER PONDING OR STANDING WATER. FAB
The Des Moines radar (KDMX), 94 km away, was scanning. The volume nearest the first event began at 21:20 UTC.
3 funnel cloud. Local standard time, as filed.
State official reported receiving multiple reports from the public of a funnel cloud dropping from and receding into the cloud base northwest of Oskaloosa over the previous 5 minutes. Rotation was also noted in clouds southwest of New Sharon.
A funnel cloud was reported to the west of Knoxville.
Trained spotter and public reports of a funnel cloud. Relayed via Marshall County Dispatch.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2015Every state in 2015This day in weather historyWarnings in Iowa, June 2015
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: 576246, 588447, 576247.