Several thunderstorms trained over the same areas of east central, and southeast Minnesota, and the adjacent counties in west central Wisconsin, along the Mississippi River. Several inches of rain led to a rock slide along a bluff near Stockholm.
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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 MPX wrote it up.
Several thunderstorms trained over the same areas of east central, and southeast Minnesota, and the adjacent counties in west central Wisconsin, along the Mississippi River. Several inches of rain led to a rock slide along a bluff near Stockholm. Water and debris was also reported on a road near intersection of Hwy 35 and Co Rd A in Pierce County.
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 Twin Cities, MN wrote its last area forecast discussion before the first event at Jul 19, 4:59 PM CST, 5 hours 1 minute earlier.
Area Forecast Discussion National Weather Service Twin Cities/Chanhassen MN 559 PM CDT Wed Jul 19 2017 .UPDATE...For 00z Aviation discussion below && .SHORT TERM...(This evening through Thursday) Issued at 424 PM CDT Wed Jul 19 2017 Ongoing severe MCS will exit to the southeast quickly late this afternoon. The forecast then becomes quite uncertain for this evening and overnight with convective redevelopment possible across central Minnesota. The atmosphere seems to be recovering somewhat across South Dakota and there have been a few cells over west central MN this afternoon. The HRRR would imply an east-west line of storms developing between 02-03Z across central MN and progress southeast for the rest of the evening into the early overnight hours. This activity would contain a large hail threat, although some damaging wind gusts are also possible. The biggest threat will be heavy rainfall with training cells, but CAMs seem to keep the line progressing southward which would limit flash flooding potential. .LONG TERM...(Thursday night through Wednesday) Issued at 445 PM CDT Wed Jul 19 2017 For the extend, we'll see our zonal flow transition over to northwest flow this weekend, before going back more zonal by the middle of next week. Most concerning period looks to Thursday night into Friday, when another round of severe weather and heavy rainfall looks possible. Our dry weather Thursday will be short lived as moisture quickly returns Thursday night from Nebraska toward southwest MN. Most of the guidance is in agreement with an elevated band of thunderstorms working into southwest MN. This will push the warm front back into southern MN Friday afternoon, and guidance is in good agreement on storms firing off along this front and heading southeast toward Chicago Friday night. Some discrepancies with how far north this, but we followed the more southern solutions for QPF Friday, like the GFS for Friday as what are seeing today has tracked south of even what the southern models had. Moisture, instability, and shear parameters all look similar to what we are seeing today, so all modes of severe weather will be possible, but upscale growth to an MCS looks likely, probably tracking from south central MN over toward southern lower Michigan. For the weekend, it is looking up weather wise, as a secondary shortwave in the increasingly northwest low drops across northeast MN toward the U.P. of Michigan, with the majority of activity Saturday night into Sunday staying off to our northeast. We'll have dry weather to start next week, but by Tuesday, moisture will be surging back north across the Plains, with thunderstorm chances returning Tuesday night into Wednesday as a front works into the area. && .AVIATION...(For the 00Z TAFS through 00Z Thursday evening) Issued at 600 PM CDT Wed Jul 19 2017 In the wake of the showers and storms there will be a period of benign weather, but another round of storms may develop across central MN/WI after 03z into the overnight hours. MVFR cigs/vsbys would be possible attendant with the storms, including patchy fog and MVFR cigs in the wake of the precip with the warm front stretched across the area. After daybreak Thursday clear skies will prevail with northwest winds of 7-10 knots. KMSP... The next round of storms looks to develop around 03z, and persist through around 07z. MVFR cigs/vsbys will be possible during that time, and cigs around 1500 feet may linger through the morning push. After 14z clear skies and northwest winds around 8 knots prevail. /OUTLOOK FOR KMSP/ Fri...Mainly VFR. -SHRA/TSRA likely. Winds SE 5-10 kts. Sat...Mainly VFR. Chc MVFR in -SHRA/TSRA. Winds lgt and vrbl. Sun...VFR. Wind NW 10 kts. && .MPX WATCHES/WARNINGS/ADVISORIES... WI...None. MN...None. && SHORT TERM...BORGHOFF LONG TERM...MPG AVIATION...LS
Hazardous Weather Outlook...UPDATED National Weather Service Twin Cities/Chanhassen MN 1259 PM CDT Wed Jul 19 2017 MNZ041>045-047>070-073>078-082>085-091>093-WIZ014>016-023>028- 201800- Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns- Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa- Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Sibley-Carver-Scott-Dakota- Redwood-Brown-Nicollet-Le Sueur-Rice-Goodhue-Watonwan-Blue Earth- Waseca-Steele-Martin-Faribault-Freeborn-Polk-Barron-Rusk- St. Croix-Pierce-Dunn-Pepin-Eau Claire- 1259 PM CDT Wed Jul 19 2017 This Hazardous Weather Outlook is for portions of central and southern Minnesota...and west central Wisconsin. .DAY ONE...This Afternoon and Tonight There is an enhanced risk of severe weather. A complex of thunderstorms is expected to impact southern Minnesota this afternoon, with the potential for widespread damaging wind gusts. Another round of storms could develop this evening across central Minnesota and track southeast into the overnight, with mainly a large hail threat. A couple tornadoes are possible with either round. Very heavy rainfall is also possible, which could lead to localized flooding. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday Thunderstorm chances return late Thursday night into Friday. There is a slight risk of severe weather, mainly south of I-94. Large hail, damaging winds, and heavy rainfall appear to be the primary threats. Thunderstorms will be possible late Saturday and Sunday, and again from Tuesday into Wednesday. Widespread severe weather during those time frames is not anticipated at this time. .SPOTTER INFORMATION STATEMENT... SKYWARN spotter activation will likely be needed this afternoon and tonight. Borghoff
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1020 PM CDT WED JUL 19 2017
MNZ060-062-063-069-070-200345-
Washington-Dakota-Hennepin-Ramsey-Scott-
1020 PM CDT WED JUL 19 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HENNEPIN...
NORTHWESTERN DAKOTA...NORTHEASTERN SCOTT...SOUTHERN WASHINGTON AND
SOUTHERN RAMSEY COUNTIES...
At 1020 PM CDT, a strong thunderstorm was located over South
Minneapolis, or near Minneapolis, moving east at 50 mph.
Winds in excess of 30 mph and nickel size hail are possible with this
storm.
Locations impacted include...
Minneapolis, St. Paul, Bloomington, Eagan, Woodbury, Eden Prairie,
Burnsville, Minnetonka, Edina, St. Louis Park, Maplewood and
Shakopee.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4493 9348 4503 9278 4493 9275 4491 9276
4490 9278 4482 9277 4480 9279 4476 9347
TIME...MOT...LOC 0320Z 265DEG 44KT 4491 9325
ETASpecial Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1022 PM CDT WED JUL 19 2017
MNZ058-059-200345-
Meeker-Wright-
1022 PM CDT WED JUL 19 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN WRIGHT AND
NORTHEASTERN MEEKER COUNTIES...
At 1022 PM CDT, a strong thunderstorm was located over Litchfield
Airport, or 18 miles north of Hutchinson, moving east at 45 mph.
Nickel size hail is possible with this storm.
Locations impacted include...
Litchfield, Cokato, Dassel, Forest City, Darwin, Litchfield Airport
and Smith Lake.
This includes U.S. Highway 12 between mile markers 96 and 122.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
LAT...LON 4516 9404 4498 9418 4498 9426 4512 9462
4527 9456
TIME...MOT...LOC 0322Z 287DEG 38KT 4515 9448
ETAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1042 PM CDT WED JUL 19 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1017 PM HEAVY RAIN 3 WSW ROSEMOUNT 44.74N 93.12W
07/19/2017 M4.25 INCH DAKOTA MN PUBLIC
EVENT TOTAL SO FAR. 2.75" OF IT OCCURRED
BETWEEN 8:15 AND 10:15 P.M.
&&
LSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1047 PM CDT WED JUL 19 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1045 PM HEAVY RAIN 4 NE BURNSVILLE 44.79N 93.23W
07/19/2017 M3.18 INCH DAKOTA MN TRAINED SPOTTER
STORM TOTAL FROM 3:30 P.M. TO 10:40 P.M.
TODAY.
&&
LSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1055 PM CDT WED JUL 19 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1045 PM HEAVY RAIN 4 SSE EAGAN 44.79N 93.13W
07/19/2017 M3.15 INCH DAKOTA MN MESONET
MESONET STATION.
&&
LSPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1058 PM CDT WED JUL 19 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1035 PM HEAVY RAIN 3 SE EDEN PRAIRIE 44.82N 93.40W
07/19/2017 M2.55 INCH HENNEPIN MN MESONET
MESONET STATION. 6 HOUR AMOUNT.
&&
LSThe Minneapolis radar (KMPX), 105 km away, was scanning. The volume nearest the first event began at 04:01 UTC.
2 flash flood, 2 heavy rain. Local standard time, as filed.
Water and debris was on Highway 35, and County Road A near Maiden Rock.
A mesonet station in Pepin County near Stockholm measured 3.70 inches of rainfall.
Pepin County reported a rock slide from the bluffs about 1 mile north of Stockholm, due to heavy rainfall.
A local weather observer measured 5.26 inches of rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2017Every state in 2017This day in weather historyWarnings in Wisconsin, July 2017
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: 715487, 715481, 715484, 715482.