).
Every event with a place to put it. Tap one for its entry below.
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 GRB wrote it up.
Scattered thunderstorms that formed ahead of an approaching cold front brought high winds that downed trees and heavily damaged a farm building in Oconto County, and produced torrential rainfall that flooded intersections in Green Bay (Brown Co.).
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 Green Bay, WI wrote its last area forecast discussion before the first event at Jul 22, 1:59 PM CST, 4 hours 16 minutes earlier.
Area Forecast Discussion National Weather Service Green Bay WI 259 PM CDT Sat Jul 22 2017 Forecast discussion for routine afternoon forecast issuance .SHORT TERM...Tonight and Sunday Issued at 259 PM CDT Sat Jul 22 2017 Chance for, and strength of, thunderstorms late this afternoon and tonight are the main concerns in the short term. Fog from early this morning dissipated and low clouds were gradually breaking up throughout the day. This allowed instability to increase across the area during the late morning and afternoon. Mesoanalysis as of 19Z had MUCAPE values generally in excess of 1000 J/kg range across the western part of the forecast area and CIN values across north central Wisconsin were 25 J/kg or less. Nothing had developed in the area or nearby as of 19Z, but there was no shortage of boundaries, with a stationary front along the Wisconsin/Illinois border, another across Lake Superior and Upper Michigan, and a trough in eastern Minnesota. Wind directions varied considerably across the area but speeds were light, resulting in weak convergence at several locations. Dew points were generally in the mid 60s to around 70. Models were showing the surface low near the Minnesota/Manitoba border passing north of the area and dragging a trough/cold front through the state as a 500mb trough moves across Wisconsin with a 500mb low passing to the north of the state. These features should be sufficient to get thunderstorms into the area later today/tonight. Latest versions of the HRRR and RAP showed development in northern Wisconsin around 23Z, just to the west of the forecast area. Convection then moves into north central Wisconsin with a line developing to the southwest as it makes its way across the rest of the area during the late evening/nighttime hours. SPC day 1 convective outlook had most of the area in a slight risk of severe with a marginal risk for Door County and the rest of the lakeshore due to "robust speed shear." Convection is forecast to exit the area overnight but there are still some slight chance/low end chance PoPs in the far east and north in cyclonic flow around the departing system. .LONG TERM...Sunday Night Through Saturday Issued at 259 PM CDT Sat Jul 22 2017 High pressure regimes will dominate much of the weather next week with the exception of a frontal system with upper support from Tuesday evening into Wednesday evening. Temperatures expected to mostly be near seasonable levels. Moist cyclonic flow with the departing deep upper trough or nearly closed low may keep a few showers around Sunday evening until daytime heating wanes. Clearing skies later Sunday night with cooler overnight low temperatures in the 40s north to lower and mid 50s central, may lead to fog formation by early Monday morning. Otherwise a cool comfortable and drier air mass will filter into the area for the start of new work week as a high pressure system drifts into the western Great Lakes region. Next chance for precipitation and possible strong to severe storms during the Tuesday evening into wednesday evening time frame. A strong short wave trough, near the Canadian Pacific coast line this Saturday afternoon as per water vapor loop, is progged to drop over the Great Lakes region late Tuesday into Wednesday. The 850 warm air return and possibly the start of the convection begins to reach north central Wisconsin Tuesday afternoon and evening. The short wave trough then drags a cold front across the state on Wednesday, dropping the front south of the forecast area later Wednesday evening. Another high pressure system will then build into the area for the remainder of the work week and perhaps remain settled over the region into the start of next weekend. && .AVIATION...for 18Z TAF Issuance Issued at 1238 PM CDT Sat Jul 22 2017 Areas of fog dissipated this morning and low clouds were slowly breaking up too. Think that the low clouds will become scattered this afternoon. Loss of the MVFR and lower end VFR ceilings will allow the atmosphere to more easily destabilize during the afternoon into early evening. Convective development is a concern for later in the afternoon with increasing instability, an abundance of boundaries, an approaching surface system, and a mid level trough passing through Wisconsin. The best chances for storms look to be in the late afternoon/early evening across north central and central Wisconsin, and late evening/overnight farther to the east. Expect MVFR or IFR conditions with thunderstorms and some MVFR fog is likely later in the night. Should be VFR after fog dissipates in the morning. && .GRB WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM.....MG LONG TERM......TDH AVIATION.......MG
Hazardous Weather Outlook National Weather Service Green Bay WI 300 PM CDT Sat Jul 22 2017 WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-232000- Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln- Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano- Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago- Calumet-Manitowoc-Southern Marinette County- Southern Oconto County- 300 PM CDT Sat Jul 22 2017 This Hazardous Weather Outlook is for north-central and northeast Wisconsin. .DAY ONE...Tonight There is a slight risk of severe thunderstorms across almost all of northeast Wisconsin tonight. The main threats would be large hail and damaging winds. Expect the severe potential to reach north-central Wisconsin late afternoon, central and far northeast Wisconsin late afternoon into early evening and east-central Wisconsin early to mid-evening. .DAYS TWO THROUGH SEVEN...Sunday through Saturday There is a marginal risk of severe weather on Sunday, primarily east of a line from Stevens Point to Iron Mountain. Large hail and gusty winds are the main threats. There is a chance of thunderstorms Tuesday afternoon through Wednesday. It is too early to determine whether any of these storms may become severe. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and tonight. LMZ521-522-541>543-232000- The Bay of Green Bay south of a line from Cedar River MI to Rock Island Passage-Lake Michigan from Washington Island to Sheboygan- 300 PM CDT Sat Jul 22 2017 This Hazardous Weather Outlook is for portions of northwest Lake Michigan and the waters of Green Bay. .DAY ONE...Tonight There is a chance for thunderstorms tonight. A few storms may contain gusty winds. Humid air developing over the region could also result in dense fog on the lake tonight which would pose a navigation hazard to boaters. .DAYS TWO THROUGH SEVEN...Sunday through Saturday There is a marginal risk of severe thunderstorms on Sunday. Large hail and damaging winds are the main threats. There is also a chance of thunderstorms Tuesday night through Wednesday. MG/TDH
Special Weather Statement
National Weather Service Green Bay WI
441 PM CDT SAT JUL 22 2017
WIZ010-011-019-222230-
Langlade WI-Oneida WI-Forest WI-
441 PM CDT SAT JUL 22 2017
...SPECIAL WEATHER STATEMENT...
At 438 PM CDT, Doppler radar was tracking a strong thunderstorm near
Rhinelander, moving southeast at 20 mph.
Winds in excess of 30 mph will be possible with this storm along
with frequent lightning and pea sized hail. This storm may continue
to intensify.
Locations impacted include...
Rhinelander, Crandon, Pearson, Elcho, Laona, Nashville, Freeman,
Enterprise, Monico and Gagen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4556 8862 4517 8885 4545 8943 4555 8943
4556 8946 4574 8933
TIME...MOT...LOC 2138Z 297DEG 19KT 4560 8932
EBSpecial Weather Statement
National Weather Service Green Bay WI
529 PM CDT SAT JUL 22 2017
WIZ011-019-021-222315-
Langlade WI-Northern Oconto County WI-Forest WI-
529 PM CDT SAT JUL 22 2017
...SPECIAL WEATHER STATEMENT...
At 529 PM CDT, Doppler radar was tracking a strong thunderstorm over
Pickerel, or 15 miles south of Crandon, moving southeast at 30 mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Mountain, Pearson, Townsend, Lakewood, Freeman, Boot Lake Campground,
Pickerel, Hollister and Lily.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4528 8835 4509 8848 4510 8848 4512 8849
4512 8854 4532 8906 4549 8890
TIME...MOT...LOC 2229Z 298DEG 25KT 4533 8889
RDMSpecial Weather Statement
National Weather Service Green Bay WI
545 PM CDT SAT JUL 22 2017
WIZ010-011-222330-
Oneida WI-Forest WI-
545 PM CDT SAT JUL 22 2017
...SPECIAL WEATHER STATEMENT...
At 545 PM CDT, Doppler radar was tracking a strong thunderstorm over
Mc Naughton, or 7 miles northwest of Rhinelander, moving southeast at
30 mph.
Pea size hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Rhinelander, Nashville, Enterprise, Monico, Mc Naughton, Gagen,
Lennox, Goodnow, Harshaw and Starks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4563 8890 4546 8903 4547 8923 4566 8966
4582 8954
TIME...MOT...LOC 2245Z 297DEG 25KT 4571 8951
RDMSpecial Weather Statement
National Weather Service Green Bay WI
611 PM CDT SAT JUL 22 2017
WIZ019>021-074-222345-
Southern Oconto County WI-Langlade WI-Northern Oconto County WI-
Menominee WI-
611 PM CDT SAT JUL 22 2017
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN MENOMINEE...NORTHERN
OCONTO AND EAST CENTRAL LANGLADE COUNTIES UNTIL 645 PM CDT...
At 611 PM CDT, Doppler radar was tracking a strong thunderstorm near
Boulder Lake Campground, or 25 miles east of Antigo, moving southeast
at 30 mph.
Dime size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Gillett, Mountain, White Lake, Langlade, Underhill, Spruce, Breed,
Suring, Boot Lake Campground and Boulder Lake Campground.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4485 8827 4485 8836 4518 8879 4532 8862
4505 8812 4502 8812 4502 8806
TIME...MOT...LOC 2311Z 311DEG 26KT 4520 8863
RDMThe Green Bay radar (KGRB), 46 km away, was scanning. The volume nearest the first event began at 00:15 UTC.
2 thunderstorm wind, 1 flood. Local standard time, as filed.
Thunderstorm winds estimated near 60 mph downed a couple of trees down in Gillett.
A farm building was heavily damaged and several trees were snapped or uprooted on property about two miles south of Chase. The damage was caused by thunderstorm winds estimated at least 70 mph in a wet microburst.
Torrential rainfall from thunderstorms caused flooding at the intersection of Mason Street and Main Street in Green Bay, stranding 2 vehicles.
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: 714231, 714232, 716436.