A band of thunderstorms with heavy rain moved northwest to southeast from northwest Iowa County to southwest Green County during the early morning hours of June 22nd. This initial band weakened, but was followed by a second line that moved through Grant County, but dropped more rain on portions of northwest Iowa, County and then through portions of Lafayette and Green counties through mid-morning.
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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 MKX wrote it up.
A band of thunderstorms with heavy rain moved northwest to southeast from northwest Iowa County to southwest Green County during the early morning hours of June 22nd. This initial band weakened, but was followed by a second line that moved through Grant County, but dropped more rain on portions of northwest Iowa, County and then through portions of Lafayette and Green counties through mid-morning. The heavy rains closed many roads due to flooding, washing out a few, as well as causing mudslides. A severe wind gust was reported in Lafayette County near the end of the event due to a combination of the gradient winds of a wake low that developed behind the line interacting with the comma head vorticity maximum that developed at the north end of the line.
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 Milwaukee, WI wrote its last area forecast discussion before the first event at Jun 21, 8:21 PM CST, 2 hours 39 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 921 PM CDT FRI JUN 21 2013 .UPDATE...CURRENTLY SEEING AN AREA OF LIGHT SHOWERS ACROSS THE FORECAST AREA. LATEST RAP 850 AND 925 MB TEMPERATURES SHOW A GRADIENT ACROSS SOUTHERN WISCONSIN...WITH WARM ADVECTION LIKELY THE MAIN TRIGGER OF THE SHOWERS. THE LATEST NAM SHOWS THAT THE 700 MB WARM ADVECTION MAXIMUM LINES UP NICELY WITH WHERE THE SHOWERS ARE. THE LATEST HRRR IS HANDLING THE CURRENT SITUATION THE BEST OF THE SHORT TERM MODELS AND KEEPS ISOLATED TO SCATTERED SHOWERS GOING THROUGH THE REMAINDER OF THE EVENING AND INTO EARLY TONIGHT. WITH PLENTY OF MOISTURE AND DECENT ELEVATED INSTABILITY...COULD SEE SEEM BRIEF HEAVY DOWNPOURS WITH SOME THUNDER POSSIBLE ALSO. THINK THE BIGGEST CONCERN RIGHT NOW IS WHETHER CONVECTION UPSTREAM WILL GET ORGANIZED AND MOVE ALONG THE INSTABILITY GRADIENT...WHICH WOULD LIKELY EVENTUALLY BRING THE ACTIVITY INTO SOUTHERN WISCONSIN. THE OVERALL CONSENSUS OF MODELS DOES SHOW AN AREA OF STORMS KNOCKING ON THE DOOR BY DAYBREAK. MAIN THREAT WOULD LIKELY BE STRONG WINDS AND HEAVY RAIN...SIMILAR TO THE STORMS THAT MOVED THROUGH THIS MORNING. SPC IS MAINTAINING A SLIGHT RISK FOR SEVERE STORMS ACROSS THE FORECAST AREA...EXCEPT FOR IN THE EAST. WILL CONTINUE TO MONITOR THE UPSTREAM ACTIVITY...HOPEFULLY GETTING A BETTER HANDLE ON THINGS OVER THE NEXT COUPLE HOURS AS THE CONVECTION DRAWS CLOSER. && .AVIATION/06Z TAFS/...HAVE RECENTLY SEEN SHOWERS POP ACROSS MUCH OF THE FORECAST AREA. THINK WARM ADVECTION ALOFT WILL KEEP THE CHANCE FOR SHOWERS GOING THROUGH THE REMAINDER OF THE EVENING AND INTO THE NIGHT. WITH PLENTY OF MOISTURE AND DECENT ELEVATED INSTABILITY...COULD SEE SEEM BRIEF HEAVY DOWNPOURS WITH SOME THUNDER POSSIBLE ALSO. BIGGER CONCERN IS WHETHER UPSTREAM STORMS WILL EVENTUALLY MOVE INTO SOUTHERN WISCONSIN...LAST NIGHT AND THIS MORNING. STILL QUITE A BIT OF UNCERTAINTY WITH THIS...PARTICULARLY WITH TIMING...SO MAY KEEP IT MAINLY DRY IN TAFS...OTHER THAN THE CURRENT ACTIVITY. WILL BE KEEPING A CLOSE EYE ON THE UPSTREAM CONVECTION AND UPDATE TAFS AS THINGS HOPEFULLY BECOME MORE CLEAR OVER THE NEXT FEW HOURS. OVERALL...VFR CONDITIONS ARE EXPECTED TO CONTINUE THROUGH SATURDAY EXCEPT FOR LOWER VSBYS POSSIBLE WITHIN HEAVIER SHOWERS/STORMS. && .PREV DISCUSSION... /ISSUED 348 PM CDT FRI JUN 21 2013/ VERY SHORT TERM...TONIGHT AND SATURDAY. FORECAST CONFIDENCE IS LOW TO MEDIUM. GUSTY SOUTH TO SOUTHEAST WINDS WITH WAKE LOW WILL CONTINUE TO WEAKEN OVER THE NEXT HOUR OR TWO IN PORTIONS OF SOUTHEAST WISCONSIN. GUSTS TO AROUND 20 KNOTS ARE THEN EXPECTED UNTIL SUNSET. TRICKY FORECAST FOR THIS PERIOD ACROSS THE AREA. SHORT TERM MODELS INDICATE THE SURFACE WARM FRONT WILL SHIFT NORTHWARD ACROSS THE AREA TONIGHT...AND REMAIN JUST NORTH OF THE AREA ON SATURDAY. 18Z NAM IS NOW KEEPING WARM FRONT OVER THE AREA ON SATURDAY...SOUTH OF THE OTHER SYNOPTIC MODELS. 850MB WARM AIR ADVECTION REMAINS OVER THE REGION TONIGHT AND SATURDAY. THE 850MB LOW LEVEL JET NOSE REMAINS FOCUSED WEST OF THE REGION TONIGHT...OVER SOUTHERN MINNESOTA INTO NORTHERN IOWA. THIS WOULD SUPPORT FURTHER DEVELOPMENT OF CONVECTION OVER THE DAKOTAS INTO AN MCS...WHICH MAY TRAVERSE ALONG THE WARM FRONT AND EDGE OF CAP TOWARD AND INTO THE AREA LATER TONIGHT INTO EARLY SATURDAY MORNING. MESOSCALE MODELS DO SHOW THIS TREND TO SOME EXTENT. THEY ALSO SHOW SOME CONVECTION DEVELOPING NEAR THE WARM FRONT ACROSS THE NORTHERN PORTIONS OF THE AREA LATER TONIGHT. ALL IN ALL...THERE COULD BE AN MCS THAT AFFECTS THE AREA LATER TONIGHT...WITH OTHER SCATTERED CONVECTION NEAR THE WARM FRONT...OR THERE COULD BE A DRY PERIOD. FOR NOW...WILL GO WITH CHANCE POPS AT BEST FOR TONIGHT INTO SATURDAY...GIVEN THE LOWER END CONFIDENCE. SPC HAS SLIGHT RISK FOR TONIGHT AND AGAIN SATURDAY...AS LARGE ELEVATED CAPE EXISTS ABOVE CAP...THOUGH DEEP LAYER SHEAR IS MODEST. PRECIPITABLE WATER VALUES ARE HIGH...SO HEAVY RAINFALL WOULD BE POSSIBLE IF CONVECTION DOES DEVELOP. TEMPERATURES ARE GOING TO BE TOUGH AS WELL...DEPENDING ON CONVECTION TRENDS AND CLOUDS. FOR NOW...WILL GO NEAR MOS GUIDANCE AND KEEP THINGS WARM AND HUMID TONIGHT AND SATURDAY. MAY CRACK 90 IN THE FAR SOUTH IF ENOUGH SUNSHINE OCCURS SATURDAY AFTERNOON...GIVEN 925MB TEMPERATURES AND 2 METER TEMPERATURE TRENDS. SHORT TERM...SATURDAY NIGHT THROUGH MONDAY. SATURDAY NIGHT...FORECAST CONFIDENCE MEDIUM. MID-UPPER RIDGING KEEPS BEST FORCING FOR ASCENT WITH UPPER JET STREAK AND LOW-LEVEL JET TO THE WEST SATURDAY NIGHT INTO SUNDAY. THE 12Z NAM IS HINTING AT A RESIDUAL BOUNDARY FROM EARLIER SATURDAY CONVECTION WILL BE THE FOCUS FOR RE-DEVELOPMENT SATURDAY EVENING. WHILE THIS IS PLAUSIBLE...THE NAM LAYER Q-VECTOR CONVERGENCE AND FRONTOGENESIS IS BEST FARTHER NORTHWEST CLOSER TO WHERE OTHER MODELS ARE FOCUSING INITIATION OF STRONGEST CONVECTION. ALSO NAM SOUNDINGS IN LINE WITH OTHERS SHOWING A DECENT CAP WHERE 1000 J/KG OF ELEVATED CAPE IS LIMITED BY 100 J/KG OF CIN. FORECAST CORFIDI VECTORS INDICATE AN MCS THAT CRESTS THE THERMAL RIDGE/THICKNESS RIDGE AXIS COULD CLIP NORTHWESTERN/WESTERN PORTIONS OF CWA SO WILL HAVE HIGHER POPS THERE. SUNDAY THROUGH MONDAY...FORECAST CONFIDENCE MEDIUM. IF MODELS ARE CORRECT KEEPING THE BULK OF CONVECTION OUT OF CWA SATURDAY NIGHT...THE ABSENCE OF A FOCUSING MECHANISM SUCH AS AN OUTFLOW BOUNDARY OR MCV...SHOULD BE ENOUGH TO ALLOW THE CAP TO HOLD KEEPING MOST OF THE DAY DRY ON SUNDAY. CONSENSUS POPS DO HAVE CHANCE/SLIGHT CHANCE POPS IN THE NW 1/2 OF THE CWA WITH THE 12Z GEM AND 00Z ECMWF BRINGING SFC TROUGH CLOSER TO CWA BY 00Z MONDAY THAN GFS OR NAM. BETTER CHANCE OF PRECIPITATION...ESPECIALLY IN THE WEST AS MODELS BRING SHORT WAVE...POSSIBLY CONVECTIVELY ENHANCED... THROUGH THE AREA SUNDAY NIGHT INTO MONDAY. AS WITH TODAY...ANY REMNANT CLOUD DEBRIS FROM OVERNIGHT CONVECTION COULD LIMIT DAYTIME HEATING SUNDAY...BUT WITH LOW POPS AND EXPECTED 925 MB TEMPERATURES FEEL A LEAN TOWARD WARMER GUIDANCE TEMPS IN LINE WITH LOW 90S. WITH EXPECTED CONVECTION...UPPER 60S TO LOWER 70S LOW TEMPS SUNDAY NIGHT TO BE FOLLOWED WITH HIGHS IN THE LOW TO MID 80S ON MONDAY. LONG TERM...MONDAY NIGHT THROUGH FRIDAY. FORECAST CONFIDENCE LOW TO MEDIUM. MODELS AGREE THAT A SHORT WAVE/MCV DRIVEN COMPLEX WILL WILL UNDERCUT THE RIDGE AND CROSS THE AREA MONDAY NIGHT INTO TUESDAY...WITH ANOTHER SHORT WAVE ARRIVING TUESDAY AFTERNOON/EVENING DEPENDING ON MODEL IN DEVELOPING PROGRESSIVE NEAR-ZONAL FLOW. YET ANOTHER SHORT WAVE MOVES THROUGH WEDNESDAY AFTERNOON AHEAD OF DEEPER WAVE THAT BEGINS TO DIG INTO THE NORTHERN LAKES REGION IN RESPONSE TO AMPLIFYING RIDGE OVER THE WESTERN U.S. TIMING DIFFERENCES LEAD TO POPS IN EVERY PERIOD... BUT DO EXPECT MORE EXPANSIVE DRY PERIODS THAN THE CONSENSUS SOLUTIONS ARE GIVING. WITH SURFACE TROUGH HANGING TO THE WEST...WILL STAY IN WARM HUMID AIR MASS THROUGH WEDNESDAY...THEN SEE A GRADUAL COOL DOWN THURSDAY AND FRIDAY WITH A CANADIAN AIR MASS WORKING IN BEHIND THE SURFACE LOW. AVIATION/00Z TAFS/...GUSTY SOUTH TO SOUTHEAST WINDS WITH WAKE LOW WILL CONTINUE TO WEAKEN OVER THE NEXT HOUR OR SO...WITH GUSTS TO AROUND 20 KNOTS EXPECTED INTO EARLY THIS EVENING. DRY CONDITIONS ARE EXPECTED THROUGH THE REST OF THIS AFTERNOON AND INTO THIS EVENING ACROSS TAF SITES...WITH VFR CONDITIONS. LEFT VFR CONDITIONS GOING THROUGH TONIGHT AND SATURDAY...AS THUNDERSTORM CHANCES LINGER BUT LOW CONFIDENCE IN TIMING AND PLACEMENT OF STORMS. MAY SEE MVFR VISIBILITIES WITH LIGHT FOG AT SITES BETWEEN 09Z AND 14Z SATURDAY. MODEST SOUTH WINDS SHOULD LINGER LATER TONIGHT INTO SATURDAY. MARINE... GUSTY SOUTH TO SOUTHEAST WINDS WITH WAKE LOW WILL LINGER FOR ANOTHER HOUR OR SO BEFORE DIMINISHING. REFER TO LATEST SPECIAL MARINE WARNINGS AND MARINE WEATHER STATEMENTS FOR MORE INFORMATION. BOATERS SHOULD REMAIN IN SAFE HARBOR UNTIL THESE GUSTY WINDS SUBSIDE. DEW POINTS RISING THROUGH THE 60S WILL OVERSPREAD THE COOL LAKE WATERS TONIGHT INTO SATURDAY. WINDS WILL WEAKEN ENOUGH TO ALLOW FOR FOG FORMATION LATER THIS EVENING INTO SATURDAY MORNING...BEFORE MIXING OUT A BIT DURING THE AFTERNOON SATURDAY. DENSE FOG IS POSSIBLE IF WINDS WEAKEN ENOUGH...SO WILL HAVE TO WATCH TRENDS THIS EVENING. FOG MAY LINGER ON AND OFF THROUGH THE WEEKEND INTO EARLY NEXT WEEK...AS LONG AS WINDS REMAIN LIGHT ENOUGH. && .MKX WATCHES/WARNINGS/ADVISORIES... WI...NONE. LM...NONE. && UPDATE...DDV TONIGHT/SATURDAY AND AVIATION/MARINE...WOOD SATURDAY NIGHT THROUGH FRIDAY...REM
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 354 PM CDT FRI JUN 21 2013 WIZ046-047-051-052-056>060-062>072-222100- MARQUETTE-GREEN LAKE-FOND DU LAC-SHEBOYGAN-SAUK-COLUMBIA-DODGE- WASHINGTON-OZAUKEE-IOWA-DANE-JEFFERSON-WAUKESHA-MILWAUKEE- LAFAYETTE-GREEN-ROCK-WALWORTH-RACINE-KENOSHA- 354 PM CDT FRI JUN 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WISCONSIN...SOUTH CENTRAL WISCONSIN AND SOUTHEAST WISCONSIN. .DAY ONE...TONIGHT ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED LATER TONIGHT AS A COMPLEX OF STORMS TO THE WEST ROLLS IN AFTER MIDNIGHT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS OVER MUCH OF THE AREA. THE MAIN THREAT WILL BE DAMAGING WIND AND LARGE HAIL. THERE COULD BE HEAVY DOWNPOURS OF RAIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY THUNDERSTORMS ARE POSSIBLE FROM TIME TO TIME DURING THIS PERIOD. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SATURDAY AND SUNDAY OVER MAINLY SOUTH CENTRAL WISCONSIN. THE MAIN THREAT WILL BE STRONG WINDS AND HAIL. HEAT INDEX VALUES UP TO 95 ARE EXPECTED SATURDAY AND SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE TONIGHT. LMZ643>646-222100- SHEBOYGAN TO PORT WASHINGTON WI- PORT WASHINGTON TO NORTH POINT LIGHT WI- NORTH POINT LIGHT TO WIND POINT WI- WIND POINT WI TO WINTHROP HARBOR IL- 354 PM CDT FRI JUN 21 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF LAKE MICHIGAN. .DAY ONE...TONIGHT ANOTHER ROUND OF THUNDERSTORMS IS EXPECTED LATER TONIGHT AS A COMPLEX OF STORMS TO THE WEST ROLLS IN AFTER MIDNIGHT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS OVER MUCH OF THE AREA. THE MAIN THREAT WILL BE LARGE HAIL AND DAMAGING WIND. THERE COULD BE HEAVY DOWNPOURS OF RAIN. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH FRIDAY THUNDERSTORMS ARE POSSIBLE FROM TIME TO TIME DURING THIS PERIOD. A WARM AND HUMID AIR MASS FLOWING OVER THE COLDER WATERS OF LAKE MICHIGAN WILL LIKELY RESULT IN AREAS OF FOG...POSSIBLY DENSE AT TIMES. REM WWW.WEATHER.GOV/MKX
The La Crosse radar (KARX), 119 km away, was scanning. The volume nearest the first event began at 04:58 UTC.
5 flash flood, 1 thunderstorm wind. Local standard time, as filed.
Law enforcement officials reported many flooded roads, with some washed outacross Iowa County. State Highways 130 and 133 were closed by flooding and mudslides.
Law enforcement officials reported many flooded roads due to the heavy rainfall of 5 to 8 inches. A sinkhole was reported near Mineral Point.
Law enforcement officials reported many flooded roads due to the heavy rainfall.
Law enforcement officials called in with many reports of flooded roads due to the heavy rainfall. Roads on the west side of New Glarus were washed out.
Law enforcement officials reported of flooded roads due to the heavy rainfall. Several roads were covered by 1 to 3 feet of water.
A trained spotter recorded a thunderstorm wind gust of 60 mph (56 knots).
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2013Every state in 2013This day in weather historyWarnings in Wisconsin, 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: 464963, 464969, 464967, 464972, 464973, 464974.