Isolated wind damage from a thunderstorm occurred near Leon (Monroe County) during the late evening of June 9th. The winds snapped off at least a half dozen large trees and a trailer was moved and sustained damage when one of the trees fell on it.
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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 ARX wrote it up.
Isolated wind damage from a thunderstorm occurred near Leon (Monroe County) during the late evening of June 9th. The winds snapped off at least a half dozen large trees and a trailer was moved and sustained damage when one of the trees fell on it.
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 La Crosse, WI wrote its last area forecast discussion before the first event at Jun 9, 5:57 PM CST, 4 hours 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 657 PM CDT TUE JUN 9 2015 .SHORT TERM...(THIS EVENING THROUGH WEDNESDAY) ISSUED AT 256 PM CDT TUE JUN 9 2015 CURRENTLY AS OF 20Z...WATER VAPOR LOOP AND RAP 500MB HEIGHT ANALYSIS SHOWED RIDGING OVER MUCH OF THE WESTERN U.S. WITH NORTHWEST FLOW FROM SOUTHERN BRITISH COLUMBIA INTO TROUGHING OVER THE EASTERN GREAT LAKES. SHORTWAVES OF NOTE INCLUDE TWO OVER NORTHWEST WI AND NORTHWEST ONTARIO...SUPPORTING SHOWERS AND THUNDERSTORMS THERE. THERE IS ALSO A SURFACE COLD FRONT ACCOMPANYING THE NORTHWEST ONTARIO WAVE...EXTENDING INTERNATIONAL FALLS MN TO PIERRE SD. SO FAR THERE IS LIMITED CONVECTION ON THE FRONT. HOWEVER...PLENTY OF SUN AHEAD OF THE FRONT AND 925MB TEMPS WARMING TO NOW IN THE 23C NEAR I- 39 TO AROUND 27C NEAR I-35 PER ACARS SOUNDINGS HAS SUPPORTED TEMPERATURES IN THE 80S TO LOW 90S...WARMEST ALONG AND WEST OF THE MISSISSIPPI RIVER. DEEP DRY AIRMASS IN THE 12Z MPX SOUNDING HAS ALLOWED DEWPOINTS TO MIX DOWN INTO THE LOW TO MID 50S. THESE LOW DEWPOINTS ARE GREATLY REDUCING CAPE ALONG THE FRONT...AND COMBINED WITH THE SHORTWAVES OFF TO THE NORTH AND EAST REDUCING DYNAMIC FORCING...IS WHY CONVECTION HAS BEEN LIMITED ON THE FRONT. LASTLY...WELL TO OUR SOUTHWEST...A MULTITUDE OF SHORTWAVES WERE PRESENT OVER SOUTHERN CALIFORNIA...UTAH AND ARIZONA...WHICH INCLUDES THE REMNANTS OF HURRICANE BLANCA. THESE ARE PROGGED TO TAKE AIM AT THE AREA LATE THURSDAY. PRECIPITABLE WATER ON THE 12Z TUSCON SOUNDING WAS 1.6 INCHES. MODELS ARE IN GOOD AGREEMENT DIVING THE COLD FRONT THROUGH THE FORECAST AREA TONIGHT AS THE NORTHWEST ONTARIO HEADS SOUTHEAST. IT APPEARS ANY CONVECTION THAT MAY IGNITE ALONG THE FRONT THIS AFTERNOON IN CENTRAL MN WILL FALL APART AS IT ENTERS THE FORECAST AREA THIS EVENING. THIS IS DUE TO THE LOSS OF DAYTIME HEATING...THE LACK OF LOW LEVEL MOISTURE ALONG THE FRONT AND THE MAIN DYNAMICS WELL TO THE NORTH. CANNOT RULE OUT A STRONGER STORM TRACKING ACROSS TAYLOR COUNTY BEING CLOSER TO THE DYNAMICS...WITH SOME GUSTY WINDS AND HAIL GIVEN THE INVERTED-V SOUNDING ENVIRONMENT. KEPT SOME 15-30 PERCENT CHANCES IN FOR THE EVENING...HIGHEST NORTHWEST. AFTER MIDNIGHT INTO WEDNESDAY CONDITIONS LOOK DRY AS SUBSIDENCE AND HIGH PRESSURE BUILD IN BEHIND THE FRONT. MOSTLY CLEAR SKIES TONIGHT...ESPECIALLY AFTER MIDNIGHT IN THE WAKE OF THE FRONT...PLUS A RELATIVELY LIGHT WIND SHOULD ALLOW TEMPERATURES TO DROP CLOSE TO THE 50S TO NEAR 60 DEWPOINTS. PLENTY OF SUN LOOKS TO BE ON TAP FOR WEDNESDAY. 925MB TEMPS DEFINITELY COOLER TOMORROW...18-20C AT 18Z...BUT THESE SHOULD STILL SUPPORT HIGHS FROM THE MID 70S TO MID 80S GIVEN A DRY AIRMASS...WARMEST SOUTH. THAT DRY AIRMASS REFLECTED BY PRECIPITABLE WATER DROPPING TO 0.75 INCHES SHOULD ALLOW DEWPOINTS TO MIX PRETTY WELL AGAIN. .LONG TERM...(WEDNESDAY NIGHT THROUGH TUESDAY) ISSUED AT 256 PM CDT TUE JUN 9 2015 A NUMBER OF FEATURES ARE COMING TOGETHER TO PRODUCE A HEAVY RAINFALL EVENT THU AFTERNOON INTO FRIDAY MORNING...WITH A SMALLER 100 MILE BAND OF SIGNIFICANT RAINFALL IN OUR GENERAL REGION BETWEEN WISCONSIN HIGHWAY 29 AND U.S. HIGHWAY 20. 1. DPVA FROM SHORTWAVE DYNAMICS. VERY GOOD MODEL AGREEMENT EXISTS ON BRINGING THE COLLECTIVE OF SHORTWAVES IN THE DESERT SOUTHWEST THROUGH NEBRASKA AND KS WEDNESDAY NIGHT...THEN INTO AND EASTWARD ACROSS THE REGION LATE THURSDAY INTO MIDDAY FRIDAY. 2. PLENTIFUL MOISTURE. NOT ONLY DO THE SHORTWAVES BRING THE DEEPER PACIFIC MOISTURE ASSOCIATED WITH THE REMNANTS OF BLANCA...FAIRLY STRONG LOW LEVEL MOISTURE TRANSPORT DEVELOPS ACROSS THE PLAINS TO PROPEL GULF OF MEXICO MOISTURE NORTHWARD. AS SUCH...OUR PRECIPITABLE WATER CLIMBS DRAMATICALLY...REACHING 1.5 - 2 INCHES BY 00Z FRIDAY...HIGHEST ACROSS THE ENTIRE STATE OF IA. THIS HIGH LEVEL OF PRECIPITABLE WATER...OVER 200 PERCENT OF NORMAL...DOES NOT LEAVE THE FORECAST AREA UNTIL AFTER 18Z FRI. 3. RIGHT ENTRANCE REGION FROM AN 80-100 KT JET STREAK AT 200MB HOVERING ACROSS THE UPPER GREAT LAKES 4. IMPRESSIVE FRONTOGENESIS BETWEEN THE SURFACE AND 700MB ACCOMPANYING THE SHORTWAVES...ON THE NORTH SIDE OF THE ASSOCIATED SURFACE LOW TRACK. 5. ADVECTION OF CAPE...ALBEIT LESS THAN 500 J/KG...INTO THE AFOREMENTIONED FRONTOGENETICAL CIRCULATION 6. WARM CLOUD DEPTHS UP AROUND 4000 METERS...WITH THE STRONG FRONTOGENESIS CENTERED IN THE WARM CLOUD. A VARIETY OF MODEL QPFS FROM THE GFS...NAM AND ECMWF SUGGESTS 1 TO 2 INCHES IS EASILY LIKELY...WITH 3 TO 5 INCHES POSSIBLE IN THAT SMALLER BAND. WHERE THE SIGNIFICANT RAINFALL FALLS...FLOODING OF RIVERS IS LIKELY...ALONG WITH URBAN AND POSSIBLY AREAL FLOODING. HOWEVER...THAT LOCATION IS VERY HARD TO PIN DOWN WITH THE 09.00Z CIPS ANALOGS AND ECMWF SUGGESTING NORTHERN IOWA...THE 09.12Z NAM ACROSS NORTHERN IOWA TO I-90...THE 09.12Z ECMWF ALONG I-90 TO GREEN BAY...AND THE 09.12Z CANADIAN/GFS JUST NORTH OF I-90. A FLOOD WATCH HAS NOT BEEN ISSUED AT THIS TIME GIVEN THE DISAGREEMENT ON EXACTLY WHERE THE FRONTOGENESIS BAND SETS UP...AND THE EVENT STILL BEING 48-72 HOURS OUT. HOWEVER...A WATCH WILL LIKELY BE NEEDED. AS THE SHORTWAVES PULL OUT OF THE AREA FRIDAY NIGHT AND SATURDAY...WE SHOULD SEE A DRIER PERIOD THANKS TO SUBSIDENCE AND HIGH PRESSURE BUILDING IN. HAVE LOWERED PRECIPITATION CHANCES ACCORDINGLY TO NOW DRY IN OUR NORTHWEST HALF. STILL MAINTAINED SOME 20 PERCENT CHANCES IN THE SOUTHEAST HALF IN THE EVENT THE SHORTWAVES PULL OUT SLOWER LIKE THE 09.12Z CANADIAN. AFTER SATURDAY AND THROUGH NEXT TUESDAY...PRECIPITATION CHANCES MOSTLY IN THE 30-50 PERCENT RANGE LITTER THE FORECAST. THERE ARE LIKELY TO BE SOME DRY PERIODS...BUT TIMING THAT LOOKS EXTREMELY PROBLEMATIC AS WE SIT IN SOUTHWEST FLOW AROUND A SUBTROPICAL RIDGE IN THE SOUTHEAST U.S.. THERE ARE SOME HINTS IN THE 09.00Z/12Z ECMWF OF ANOTHER SIGNIFICANT SHORTWAVE ROUNDING THE RIDGE AND IMPACTING THE AREA SATURDAY NIGHT/SUNDAY...WITH 1 TO 2 INCHES OF RAINFALL. THE GFS IS MUCH MORE TAME. GIVEN WHAT HAPPENS THU/FRI...WE DEFINITELY DO NOT THE ECMWF RAIN. BEING UNDER THE SUBTROPICAL FLOW WITH OFF AND ON PRECIPITATION...WE SHOULD HOVER NEAR SEASONABLE NORMS FOR HIGHS AND LOWS. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z WEDNESDAY EVENING) ISSUED AT 656 PM CDT TUE JUN 9 2015 A COLD FRONT WILL MOVE ACROSS THE TAF SITES TONIGHT AND MAY TRIGGER SCATTERED SHOWERS AND THUNDERSTORMS AS IT MOVES THROUGH. CONFIDENCE WAS NOT HIGH ENOUGH TO INCLUDE THEM IN THE TAF AT THIS TIME...BUT WILL HAVE TO KEEP A CLOSE EYE ON THIS POTENTIAL AS WE GO THROUGH THIS EVENING. OTHERWISE...LOOK FOR WINDS TO SWITCH TO THE NORTHWEST BEHIND THE FRONT. PLAN ON VFR CONDITIONS THROUGH THE TAF PERIOD. && .HYDROLOGY... ISSUED AT 256 PM CDT TUE JUN 9 2015 A 100 MILE WIDE BAND OF SIGNIFICANT RAINFALL...ON THE ORDER OF 3 TO 5 INCHES AND POSSIBLY HIGHER...IS LOOKING TO FALL SOMEWHERE BETWEEN WISCONSIN HIGHWAY 29 AND U.S. HIGHWAY 20 IN OUR REGION BETWEEN THURSDAY AFTERNOON AND FRIDAY MORNING. RIVER CONTINGENCY FORECASTS USING THESE AMOUNTS OF RAINFALL SUGGESTS GAUGES ON ANY RIVER EXCEPT THE MISSISSIPPI COULD REACH MODERATE OR MAJOR STAGE. THE MISSISSIPPI COULD CLIMB AT LEAST TO MINOR. AREAL AND URBAN FLOODING WOULD ALSO BE POSSIBLE...AND LIKELY SHOULD THE BAND SET UP OVER LA CROSSE OR AUSTIN. ITS WORTH NOTING THAT HALF OF THE AFOREMENTIONED RAINFALL MAY FALL IN 3 HOURS ACCORDING TO HIGHER RESOLUTION MODEL GUIDANCE...SUGGESTING SOME FLASH FLOODING POTENTIAL. THE NEXT 2 DAYS WILL ALL BE ABOUT PINNING DOWN THE EXACT LOCATION OF THE BAND OF SIGNIFICANT RAINFALL. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...NONE. MN...NONE. IA...NONE. && SHORT TERM...AJ LONG TERM...AJ AVIATION...WETENKAMP HYDROLOGY...AJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LA CROSSE WI 955 PM CDT TUE JUN 9 2015 IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-WIZ017-029- 032>034-041>044-053>055-061-101200- MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- TAYLOR-CLARK-BUFFALO-TREMPEALEAU-JACKSON-LA CROSSE-MONROE-JUNEAU- ADAMS-VERNON-CRAWFORD-RICHLAND-GRANT- 955 PM CDT TUE JUN 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST IOWA...SOUTHEAST MINNESOTA...AND SOUTHWEST INTO CENTRAL WISCONSIN. .DAY ONE...TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE OVERNIGHT. LIGHTNING WILL BE THE MAIN HAZARD FROM ANY THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY CONFIDENCE IS INCREASING FOR A HEAVY RAIN EVENT THURSDAY INTO FRIDAY...WITH THE HEAVIEST RAINS FALLING THURSDAY NIGHT. HOWEVER IT REMAINS UNCERTAIN WHERE THE HEAVIEST OF THE RAIN MAY FALL. PLAN ON WITHIN BANK RISES ON STREAMS AND RIVERS AND POSSIBLE FLOODING. THUNDERSTORM CHANCES WILL LINGER THROUGH THE WEEKEND INTO EARLY NEXT WEEK. HOWEVER...IT IS TOO EARLY TO DISCERN EXACT TIMING AND SEVERE POTENTIAL WITH ANY OF THESE POTENTIAL STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. RAINFALL REPORTS WOULD BE APPRECIATED THURSDAY... THURSDAY NIGHT AND FRIDAY. .EMERGENCY MANAGEMENT COORDINATION... A WEBINAR CONCERNING THE HEAVY RAIN AND POTENTIAL FLOODING THREATS LATE THURSDAY INTO FRIDAY MORNING IS SCHEDULED FOR 2 PM WEDNESDAY. WETENKAMP
The La Crosse radar (KARX), 29 km away, was scanning. The volume nearest the first event began at 04:04 UTC.
1 thunderstorm wind. Local standard time, as filed.
Around a half dozen large and healthy trees were snapped off by the winds from a thunderstorm. A trailer was also moved by the winds and sustained damage when a tree fell on it.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2015Every state in 2015This day in weather historyWarnings in Wisconsin, 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: 573842.