Numerous strong to severe thunderstorms developed over southern WI with the passage of weak low pressure and a cold front. Mostly tree damage was observed.
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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.
Numerous strong to severe thunderstorms developed over southern WI with the passage of weak low pressure and a cold front. Mostly tree damage was observed. Street flooding occurred in Milwaukee after a couple slow moving thunderstorms affected the area.
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 Jul 5, 9:05 AM CST, 2 hours 11 minutes earlier.
Area Forecast Discussion National Weather Service Milwaukee/Sullivan WI 1005 AM CDT Wed Jul 5 2023 .UPDATE... (Issued 1005 AM CDT Wed Jul 5 2023) Minor timing differences with the frontal passage and associated minor changes to the high temperatures today are the main adjustments to the forecast this morning. Continuing the thought that gusty winds are the main concern with the associated line of storms. Dry pocket aloft should assist with downburst potential, with ML CAPE remaining favorable for storm development along and ahead of the front. Main line of storms still looks to exit the region early this evening, with some lingering showers and perhaps an isolated thunderstorm expected into the early overnight hours before ending. Dry weather still expected on Thursday as high pressure builds back into the area. MH && .SHORT TERM... (Issued 337 AM CDT Wed Jul 5 2023) Today through Thursday: A cold front will move through southern Wisconsin today, bringing a chance for showers and thunderstorms. There could be a few showers well ahead of the front this morning, but the bulk of precip is expected with the frontal passage this afternoon. Looks like enough of a window of time ahead of the front for some heating and increasing instability, with ML CAPE around 1000-1500 J/kg by early afternoon. There won't be much shear to go along with the instability...and mid-level lapse rates are on the lower end as well. Could be a few stronger storms given the instability and marginal shear, with gusty winds more of a concern than hail. Precipitable water values are expected to push 2 inches given dewpoints rising to near 70 ahead of the front. This could result in some brief heavy rainfall as the storms move through. The main line of storms should clear the southeast forecast area by early evening, with some lingering post frontal showers possible along with a few rumbles of thunder. This activity should wind down by overnight, with dry weather then expected on Thursday as high pressure begins to build back into the area. Temps today will approach 90 in the east ahead of the front, with low to mid 80s west given the earlier arrival of the front and precip. Lingering clouds and cooler conditions behind the front will likely keep high temps from getting out of the 70s on Thursday. DDV && .LONG TERM... (Issued 337 AM CDT Wed Jul 5 2023) Friday through Tuesday: Kept some low shower/storm chances going at times late this weekend into early next week. Not a very strong signal for precip any given day, but this pattern will leave the door open for shortwaves to move through once in a while, which could kick off a few showers/storms. Temps are expected to gradually warm back up Friday through Monday, with a halt to this possible by Tuesday as a stronger system may move into the area. DDV && .AVIATION... (Issued 1005 AM CDT Wed Jul 5 2023) VFR conditions expected through this morning across southern Wisconsin, with MVFR conditions developing at times beneath showers and thunderstorms as a cold front progresses northwest to southeast today and tonight. Wind shift from southwesterly to northwesterly expected this afternoon, with some gustier winds possible along the immediate frontal passage. Stronger thunderstorms may be capable of producing briefly gusty winds as well, especially in far southern Wisconsin. MH && .MARINE... (Issued 337 AM CDT Wed Jul 5 2023) Low pressure will move through the area today, dragging a cold front through along with a chance for showers and storms. South to southwest winds ahead of the front into this afternoon will become northerly and breezy behind the front late today into tonight. The breezy northerly winds will linger into Thursday before lighter winds return late week into the weekend under high pressure. DDV && .MKX WATCHES/WARNINGS/ADVISORIES... WI...None. LM...None. && Visit us at weather.gov/milwaukee Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/NWSMilwaukee www.twitter.com/NWSMilwaukee www.youtube.com/NWSMilwaukee
Hazardous Weather Outlook National Weather Service Milwaukee/Sullivan WI 408 AM CDT Wed Jul 5 2023 WIZ046-047-051-052-056>060-062>072-060915- Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge- Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee- Lafayette-Green-Rock-Walworth-Racine-Kenosha- 408 AM CDT Wed Jul 5 2023 This Hazardous Weather Outlook is for portions of east central Wisconsin, south central Wisconsin and southeast Wisconsin. .DAY ONE...Today and Tonight A round of thunderstorms is anticipated this afternoon and evening, along and ahead of a cold front. Some stronger thunderstorms capable of marginally severe hail and gusty winds are possible during this period, particularly in southeast Wisconsin. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There will be small chances for thunderstorms at times Friday night through Tuesday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. LMZ643>646-060915- 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- 408 AM CDT Wed Jul 5 2023 This Hazardous Weather Outlook is for the nearshore waters from Sheboygan Wisconsin to Winthrop Harbor Illinois. .DAY ONE...Today and Tonight A round of thunderstorms is anticipated later Wednesday afternoon and evening, along a cold front. Some stronger storms with gusty winds and hail are possible during this period. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There will be small chances for thunderstorms at times Friday night through Tuesday. LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-060915- Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to mid-line of lake.- Lake Michigan from Seul Choix Point to Rock Island Passage 5NM offshore to Mid Lake- Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and North of a line from Charlevoix MI to South Fox Island 5NM offshore- Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake- Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake- Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake- Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake- Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake- Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake- Lake Michigan from North Point Light to Wind Point WI 5NM offshore to Mid Lake- Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM offshore to Mid Lake- Lake Michigan from Wilmette Harbor to Michigan City in 5NM offshore to Mid Lake- Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake- Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake- Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake- Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake- Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake- Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake- 408 AM CDT Wed Jul 5 2023 This Hazardous Weather Outlook is for the open waters of Lake Michigan. .DAY ONE...Today and Tonight A round of thunderstorms is anticipated over most of the lake this afternoon into tonight, as a cold front moves eastward. Some stronger storms with gusty winds and hail are possible, mainly over southern portions of the lake. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday There will be small chances for thunderstorms at times Friday night through Tuesday. www.weather.gov/mkx
The Milwaukee radar (KMKX), 39 km away, was scanning. The volume nearest the first event began at 17:16 UTC.
7 thunderstorm wind, 1 hail, 1 flood. Local standard time, as filed.
A large tree down and power lines down in the Rockdale area.
Trees and branches down in Fitchburg.
A large tree of a diameter of 15-20 inches down on a road.
One large tree snapped and another uprooted. Other trees and branches down in the area.
Damage to small sheds, a porch which was under construction, and trees all near Willow Valley Road.
A large tree snapped off and landing on power lines.
Many streets flooded mostly in the east central portions of the county, including on Humboldt Blvd. from North Ave. to Capitol Dr., and on Prospect Ave. Street flooding was also reported at Cleveland and 45th streets.
Several large tree limbs down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wisconsin in 2023Every state in 2023This day in weather historyWarnings in Wisconsin, July 2023
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: 1105297, 1105296, 1105298, 1105299, 1105301, 1105300, 1105302, 1106151, 1105303.