{"id":6076,"date":"2025-07-16T05:15:02","date_gmt":"2025-07-16T09:15:02","guid":{"rendered":"https:\/\/us.weatheramerica.com\/?p=6076"},"modified":"2025-07-16T05:15:02","modified_gmt":"2025-07-16T09:15:02","slug":"weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday","status":"publish","type":"post","link":"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/","title":{"rendered":"Weather Wisconsin: Heat and humidity spark storm risk Wednesday"},"content":{"rendered":"<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6077\" src=\"http:\/\/us.weatheramerica.com\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607.jpg\" alt=\"\" width=\"2121\" height=\"1414\" srcset=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607.jpg 2121w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-768x512.jpg 768w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-1536x1024.jpg 1536w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-2048x1365.jpg 2048w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-330x220.jpg 330w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-420x280.jpg 420w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-615x410.jpg 615w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-860x573.jpg 860w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607-219x146.jpg 219w\" sizes=\"auto, (max-width: 2121px) 100vw, 2121px\" \/><\/p>\n<p>**Heat and humidity continue to build across much of southern and central Wisconsin this <strong>Wednesday, July 16<\/strong>, with a <strong>First Alert Day<\/strong> in effect due to the <strong>high likelihood of strong to severe thunderstorms<\/strong> later in the day. The <strong>heat index<\/strong> will climb into the <strong>lower 90s\u00b0F (32\u201334\u00b0C)<\/strong>, driven by a thick, moisture-laden air mass that&#8217;s setting the stage for <strong>volatile afternoon and evening conditions<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Warm, unstable air mass ignites storm development Wednesday<\/strong><\/h3>\n<p>Throughout the day, the <strong>combination of soaring temperatures<\/strong> and <strong>oppressive humidity<\/strong> will <strong>energize the atmosphere<\/strong>, especially between <strong>2:00 PM and 8:00 PM local time<\/strong>, when the <strong>greatest risk of severe weather<\/strong> is expected. Forecast models indicate that <strong>damaging wind gusts<\/strong>, <strong>hail<\/strong>, and <strong>torrential downpours<\/strong> may accompany the <strong>stronger storm cells<\/strong>, particularly across areas including <strong>Madison<\/strong>, <strong>La Crosse<\/strong>, and parts of <strong>central Wisconsin<\/strong>. The <strong>Storm Prediction Center<\/strong> has issued a <strong>Level 2 out of 5 \u201cSlight Risk\u201d<\/strong> across the region, underscoring the <strong>potential for organized, fast-moving storms<\/strong> capable of producing <strong>localized flooding<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Cooler, drier air arrives Thursday into Friday<\/strong><\/h3>\n<p>A <strong>cold front<\/strong> will advance across <strong>Wisconsin<\/strong> late Wednesday night into <strong>Thursday<\/strong>, bringing a <strong>decisive end to the heat and humidity<\/strong>. In its wake, <strong>temperatures<\/strong> will drop into the <strong>mid to upper 70s\u00b0F (24\u201326\u00b0C)<\/strong> by day, with <strong>overnight lows<\/strong> cooling into the <strong>upper 50s to near 60\u00b0F (14\u201316\u00b0C)<\/strong>. The transition will usher in a <strong>pleasant and refreshing air mass<\/strong>, supported by <strong>high pressure<\/strong> dominating the area through <strong>Friday<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Weekend outlook: unsettled with increasing rain chances<\/strong><\/h3>\n<p>By <strong>Saturday<\/strong>, the weather pattern becomes <strong>more variable<\/strong> again. A <strong>weak surface trough<\/strong> sliding through the <strong>Upper Midwest<\/strong> will increase the <strong>probability of showers and thunderstorms<\/strong>, with current forecasts showing a <strong>30% to 50% chance<\/strong> of rain throughout <strong>Saturday<\/strong>, possibly extending into <strong>Sunday night<\/strong>. <strong>Temperatures will rebound gradually<\/strong>, and <strong>humidity will begin to rise<\/strong>, hinting at a <strong>return to more active conditions<\/strong> by <strong>early next week<\/strong> across <strong>Wisconsin<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>**Heat and humidity continue to build across much of southern and central Wisconsin this Wednesday, July 16, with a First Alert Day in effect due to the high likelihood of strong to severe thunderstorms later in the day. The heat index will climb into the lower 90s\u00b0F (32\u201334\u00b0C), driven by a thick, moisture-laden air mass [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6077,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6076","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Weather Wisconsin: Heat and humidity spark storm risk Wednesday - United States - Weather America<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Weather Wisconsin: Heat and humidity spark storm risk Wednesday - United States - Weather America\" \/>\n<meta property=\"og:description\" content=\"**Heat and humidity continue to build across much of southern and central Wisconsin this Wednesday, July 16, with a First Alert Day in effect due to the high likelihood of strong to severe thunderstorms later in the day. The heat index will climb into the lower 90s\u00b0F (32\u201334\u00b0C), driven by a thick, moisture-laden air mass [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\" \/>\n<meta property=\"og:site_name\" content=\"United States - Weather America\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-16T09:15:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2121\" \/>\n\t<meta property=\"og:image:height\" content=\"1414\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daniel Swain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Swain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\"},\"author\":{\"name\":\"Daniel Swain\",\"@id\":\"https:\/\/weatheramerica.com\/us\/#\/schema\/person\/cd71e646398f7e54b04cfbb293b310c7\"},\"headline\":\"Weather Wisconsin: Heat and humidity spark storm risk Wednesday\",\"datePublished\":\"2025-07-16T09:15:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\"},\"wordCount\":319,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/wisconsin-storm-1607.jpg\",\"articleSection\":[\"News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\",\"url\":\"https:\/\/weatheramerica.com\/us\/2025\/07\/16\/weather-wisconsin-heat-and-humidity-spark-storm-risk-wednesday\/\",\"name\":\"Weather Wisconsin: Heat and humidity spark storm risk Wednesday - 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