During the late afternoon and evening hours of June 3rd, a cluster of thunderstorms produced heavy rain across portions of Allamakee County, leading to a few localized mud slides.
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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.
During the late afternoon and evening hours of June 3rd, a cluster of thunderstorms produced heavy rain across portions of Allamakee County, leading to a few localized mud slides.
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 3, 1:53 PM CST, 2 hours 37 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service La Crosse WI 253 PM CDT Mon Jun 3 2024 .KEY MESSAGES... - Showers and storms continue through the evening across portions of northeast Iowa and southwestern Wisconsin. Small hail and locally heavy rainfall are the primary threats with these storms. - Additional showers and storms will progress through the region Tuesday evening bringing rainfall amounts of 0.5 to 1" with locally higher amounts possible. An isolated severe storm or two are possible across portions of southeast Minnesota and northeast Iowa. - Below normal temperatures with shower chances are expected into the latter half of the week with highs holding in the 70s for much of the region. Gusty winds to 30-40 mph are possible during the afternoon Wednesday and Thursday. && .DISCUSSION... Issued at 253 PM CDT Mon Jun 3 2024 * REST OF THIS AFTERNOON/EVENING: Showers and Storms across Northeast Iowa, Southwest Wisconsin Currently, showers and storms have developed across portions of northeast Iowa along a residual boundary resulting from clearing skies further west allowing for differential heating to take place. MLCAPE values in this region are around 1500-2000 J/kg certainly plenty of fuel to keep storms going into southwestern Wisconsin. However, with shear profiles being fairly unfavorable (20-30 kts of bulk shear), resulting in fairly messy convective development with storms struggling to maintain any organized updraft. As a result, primary threats with storms moving through will be locally heavy rain and hail (up to quarter sized) with initial updraft development. Storms will progress eastbound and should push east of the local area by 7-8pm at the latest. With prior rainfall across portions of northeast Iowa and southwest Wisconsin, may have to watch for some localized flooding concerns with already saturated soils. * TUESDAY/TUESDAY NIGHT: Showers and Storms, Additional Robust Rainfall Amounts With Some Severe Potential Tuesday will feature an amplified upper-level trough progressing through the region with an accompanying surface cold front. Earlier in the day, moisture advection will work its way into the region with southerly surface flow allowing dewpoints to reach well into the 60s for the afternoon with precipitable waters reaching to around 1.5" to 1.75" shown in the 03.00z HREF by late afternoon. With the increased moisture expecting fairly respectable instability with values of MLCAPE of around 1500 J/kg into the evening in the 03.15z. While the morning and much of the afternoon should remain mostly dry, cannot rule out a shower or two ahead of a subtle warm front that will push its way north into the region ahead of the aforementioned cold front. Getting into the evening hours, the recent CAMS push convection into our region from west to east along the incoming cold front. Currently, the 03.09z RAP really diminishes instability as the cold front pushes eastbound with only around 750-1000 J/kg of MLCAPE for the linear convection to work with as it pushes east of the Mississippi River. This combined with fairly marginal shear to work with as much of it is behind the boundary. This is reflected fairly well in the 03.00z joint CAPE/shear probs in the HREF which has very low probabilities (5-15% chance) for both 500 J/kg and 30 kts of bulk shear or greater. As a result, expecting minimal severe potential with low-mid level in model soundings only reaching to around 35-40 kts. So would be the kind of setup where a few gusts approach 50-55 mph or a quarter sized hail stone are possible and would be isolated in nature. This would be more likely to occur at onset of convection moving into the local area across portions southeast Minnesota and northeast Iowa where SPC has a slight risk (Threat level 2 of 5). Otherwise, with the aforementioned ample moisture and warm cloud depths of around 3500m shown in the 03.12z NAM/GFS. Expecting there could be some fairly efficient rainfall with the line of showers and storms that pushes through. Currently, 03.12z GEFS/EC ensemble show very good agreement (70-90% chance) on rainfall amounts of 0.5" or greater, with amounts of 1" or greater certainly possible (20-40% chance). The 03.12z HREF is in fairly similar agreement with roughly similar probabilities for 1" or greater. Consequently, river locations may want to be alert to potential rises in light of some of the prior rainfall that has fallen this week. * WEDNESDAY INTO THE WEEKEND: Mild Temperatures and Breezy Late Week With Shower Chances As we get through Tuesday, a broad scale upper-level trough will entrench itself over the eastern half of the CONUS with a broad ridge situated over the west subjecting our region to northwest cyclonic flow on the western periphery of the trough. As a result, expecting temperatures to trend below normal through the end of the week which essentially means highs persisting in the upper 60s to upper 70s this time of year. Current deterministic soundings show weak instability in the low levels each afternoon suggesting some cyclonic cumulus and spotty showers, particularly the further northeast you get. Additionally, with increasing low/mid-level wind fields increasing on the western flank of the synoptic trough and diurnal mixing to aid momentum transfer to the surface, would expect to see some increase in wind gusts late week. This would primarily be during the afternoon with the 03.06z EC ensemble showing respectable probabilities (40-70% chance) for wind gusts approaching 40 mph, particularly in more open areas across southeast Minnesota and northeast Iowa. Some subtle ridging Friday into Saturday may help moderate temperatures closer to normal ahead of a potential secondary trough ejection where guidance still tends to deviate in its position and timing. && .AVIATION /18Z TAFS THROUGH 18Z TUESDAY/... Issued at 1145 AM CDT Mon Jun 3 2024 CIGS: low saturation has led to some MVFR cigs creeping across/near the TAF sites for late morning/early this afternoon. RAP/HRRR soundings suggest this will mix out/lift moving into the afternoon. The propensity of short term guidance then suggest mostly BKN/SCT mid-high level (VFR) clouds into 12z Tue, with increasing chances for MVFR for Tue morning. Will steer the forecast this way. WX/vsby: further shra/ts expected this afternoon, but CAMS and main forcing mechanisms shift the bulk of the threat east/southeast of the TAF sites. Will keep dry for now - update if radar/meso model trends suggest different. WINDS: generally southerly through the period and around 10 kts or less into Tue morning. A few gusts this afternoon. Uptick in winds moving into late morning/afternoon of Tue withe more gusts into the lower 20 kts. && .ARX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. IA...None. && DISCUSSION...Naylor AVIATION...Rieck
Hazardous Weather Outlook National Weather Service La Crosse WI 1206 PM CDT Mon Jun 3 2024 IAZ011-030-WIZ041>044-053>055-061-041000- Allamakee-Clayton-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford- Richland-Grant- 1206 PM CDT Mon Jun 3 2024 This Hazardous Weather Outlook is for portions of northeast Iowa and southwest into central Wisconsin. .DAY ONE...This Afternoon and Tonight Additional scattered storms this afternoon into early evening. A few could be strong, potentially severe with a hail threat. Most storms will produce heavy rain which could result in localized, urban and street flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There are periodic thunderstorm chances through Sunday. A few stronger storms are possible Tuesday afternoon and evening. .SPOTTER INFORMATION STATEMENT... Rainfall and any severe storm reports are appreciated. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. IAZ008>010-018-019-029-MNZ079-086>088-094>096-WIZ017-029-032>034- 041000- Mitchell-Howard-Winneshiek-Floyd-Chickasaw-Fayette-Wabasha-Dodge- Olmsted-Winona-Mower-Fillmore-Houston-Taylor-Clark-Buffalo- Trempealeau-Jackson- 1206 PM CDT Mon Jun 3 2024 This Hazardous Weather Outlook is for portions of northeast Iowa...southeast Minnesota...and western into north-central Wisconsin. .DAY ONE...This Afternoon and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday There are periodic thunderstorm chances through Sunday. A few stronger storms are possible Tuesday afternoon and evening. .SPOTTER INFORMATION STATEMENT... No action needed. .EMERGENCY MANAGEMENT COORDINATION... No webinar is scheduled. nofwd
Preliminary Local Storm Report
National Weather Service La Crosse WI
412 PM CDT Mon Jun 3 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0330 PM Flash Flood Potosi 42.69N 90.72W
06/03/2024 Grant WI Public
Mud slide reported on Dog Tail Rd north of
Highway 133.
&&
JSBPreliminary Local Storm Report
National Weather Service La Crosse WI
417 PM CDT Mon Jun 3 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0350 PM Flash Flood 1 NW Platteville 42.74N 90.49W
06/03/2024 Grant WI Public
Culverts overflowing across Highway 81.
&&
JSBPreliminary Local Storm Report
National Weather Service La Crosse WI
420 PM CDT Mon Jun 3 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM Rain Platteville 42.74N 90.48W
06/03/2024 M2.50 Inch Grant WI Public
&&
JSBSpecial Weather Statement
National Weather Service La Crosse WI
447 PM CDT Mon Jun 3 2024
IAZ011-WIZ054-032215-
Allamakee IA-Crawford WI-
447 PM CDT Mon Jun 3 2024
...STRONG THUNDERSTORMS WILL IMPACT CENTRAL ALLAMAKEE AND
NORTHWESTERN CRAWFORD COUNTIES THROUGH 515 PM CDT...
At 446 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles east of Lansing to near Waukon.
Movement was east at 10 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Lansing, Mount Sterling, Ferryville, Fairview, State Road 9 And
County X 20, Joy Hollow, Rush Creek, Red Barn Campground, Churchtown,
Village Creek, Oak Ridge, and Rising Sun.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4329 9149 4340 9148 4342 9100 4342 9088
4327 9091
TIME...MOT...LOC 2146Z 254DEG 10KT 4335 9107 4334 9147
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
SkowSpecial Weather Statement
National Weather Service La Crosse WI
517 PM CDT Mon Jun 3 2024
WIZ053-054-032245-
Vernon WI-Crawford WI-
517 PM CDT Mon Jun 3 2024
...STRONG THUNDERSTORMS WILL IMPACT SOUTH CENTRAL VERNON AND NORTHERN
CRAWFORD COUNTIES THROUGH 545 PM CDT...
At 517 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Viroqua to 11 miles northeast of Harpers
Ferry. Movement was east at 15 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Viroqua, Soldiers Grove, Liberty, Gays Mills, Readstown, Mount
Sterling, Ferryville, Ross, Bell Center, Liberty Pole.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with these storms and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4329 9109 4332 9112 4340 9099 4355 9088
4354 9068 4327 9081
TIME...MOT...LOC 2217Z 263DEG 13KT 4354 9082 4332 9098
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
SkowPreliminary Local Storm Report
National Weather Service La Crosse WI
526 PM CDT Mon Jun 3 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0525 PM Rain 1 S De Soto 43.41N 91.19W
06/03/2024 M0.85 Inch Crawford WI Public
&&
JSBThe La Crosse radar (KARX), 52 km away, was scanning. The volume nearest the first event began at 22:29 UTC.
2 flash flood. Local standard time, as filed.
The public reported a mud slide caused a block wall to come down on X52 and the rail track next to it. Mud debris was reported to be on the train track.
A couple of small mudslides were reported near Lansing. Clear Creek was also reported to be out of its banks.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2024Every state in 2024This day in weather historyWarnings in Iowa, June 2024
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: 1190574, 1190575.