Wisconsin State Climatology Office
@WI_ClimateSCO
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The Wisconsin State Climatology Office provides climate services to help Wisconsinites use weather and climate information most effectively.
Univ. of Wisconsin-Madison
Joined March 2023
This is the most recent tornado of EF3 or greater strength to impact Wisconsin. Records show a decrease in these exceptionally strong twisters in recent decades. The update to the EF scale in 2007 adjusted damage indicators to account for the stronger construction of buildings.
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4 YEARS AGO TODAY: Boscobel (Grant County) was struck by an EF3 tornado, with estimated max winds of 160 mph. Remarkably, no injuries were reported, though a house southeast of the city suffered extreme damage. Photos are from @NWSLaCrosse #wiwx
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It may not come as a surprise, but last month was the second most humid July in Wisconsin since 1979!. Even worse, on July 23, Grant County was more humid than Jacksonville, Florida. Yuck!! #wiwx
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JULY HIGHLIGHTS:.🔥 Persistent wildfire smoke.🌊 Lots of flash flooding.☀ Heat waves bookended the month.🌪 8 tornadoes in the state
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RT @BenNollWeather: July was the month of the downpour in the United States, with a remarkable 2,332 flood reports. The states with the hi….
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RT @NWSGreenBay: Wildfire smoke will continue across the region this weekend. Air quality is expected to reach unhealthy levels at times, s….
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In recent years, we've been seeing (and smelling) Canada's wildfire smoke more frequently and with greater impacts. Learn more in our latest Wisconsin Climate Chronicle!
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11 AM update: Green Bay and Milwaukee are now experiencing very unhealthy air quality, ranking as the top two most polluted cities in the US.
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As of 9 AM, six Wisconsin cities are in the top 10 for worst air quality in the country, according to IQAir. Some places in northeast Wisconsin are reporting even worse conditions, with AQI levels over 200. #wiwx
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Air quality is already at unhealthy levels in the Arrowhead of Minnesota this afternoon (map 1). Unhealthy conditions are expected in central and eastern Wisconsin on Wednesday (map 2).
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Canadian wildfire smoke is sinking back into northern Wisconsin today — widespread smokiness is expected across the state tomorrow (Wednesday) #wiwx
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🗣️ Wisconsin is drought-free!! 🗣️. As of yesterday's update to the US Drought Monitor, only two splotches of abnormal dryness remain along portions of the southern state line. #wiwx
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"Corn sweat" (aka evapotranspiration) seems to be a hot topic this week! We talked about what it is and how it impacts our summers with @WXPR this morning:.
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And it definitely *feels* like the peak of the dog days of summer! 🥵.
Today is considered the peak of the "dog days of summer." The dog days get their name based on astronomy. In ancient times, many cultures believed exceptionally hot weather was directly related to the appearance of Sirius - the "dog star." (1/2)
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Assistant State Climatologist Ed Hopkins has compiled all the Wisconsin heat stats you could ever want:
climatology.nelson.wisc.edu
A full report of the hottest temperatures and heat indices recorded in the state of Wisconsin since the late 1800s.
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Check out DHS Wisconsin's Extreme Heat page for tips on how to stay cool and safe:
dhs.wisconsin.gov
Climate change is turning up the heat in WisconsinWisconsin is already experiencing more frequent and intense heat waves as our changing climate becomes warmer and wetter. And, many more severe heat...
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Extreme heat will surge back into Wisconsin on Wednesday and Thursday! Heat indices will likely surpass 100° in many locations. #wiwx
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RT @BenNollWeather: The Corn Belt is expected to be the most humid region in the country this week!. A heat dome and corn sweat will cause….
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TORNADO STRENGTH: Four EF2 tornadoes have occurred in Wisconsin this year, compared to three by this time in 2024. Nearly half of the tornadoes in the state in 2025 have been EF0s. By this point last year, more tornadoes had occurred, and over half were EF1s. #wiwx
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