Southern Wisconsin Weather Watch: Your Guide to the Upcoming Storms and Heatwave
This week’s forecast for southern Wisconsin paints a dynamic picture of volatile weather, featuring a significant return of storm activity beginning late Thursday, extending through the weekend, and potentially into early next week.
Beyond the immediate threat of thunderstorms, anticipate a substantial shift in temperatures and humidity levels, culminating in a significant heatwave by mid-next week.
The Storm Front Arrives
Prepare for a dramatic shift in our local weather as storm chances make a comeback late Thursday.
The evening hours are expected to bring scattered showers and thunderstorms, which will likely continue their presence overnight and well into Friday morning.
While these initial storms may not be severe, their presence will significantly influence the weather pattern for the remainder of Friday.
Friday’s Alert Day and Potential for Severe Weather
Friday has been officially declared an Alert Day for southern Wisconsin, underscoring the potential for impactful weather.
The overarching cloud cover and lingering showers from the overnight and morning storms could help to cap the severe threat later in the day, limiting the extent of widespread severe outbreaks.
When storms do develop on Friday afternoon, evening, and into the overnight hours, the primary threats to be aware of are strong winds and hail.
While the overall atmosphere might be somewhat stabilized by earlier cloud cover, localized areas can still experience the conditions necessary for severe storm development.
Our organization emphasizes staying informed and having a plan for severe weather alerts.
Weekend Outlook and Early Next Week Transition
The storm systems are expected to begin tapering off Friday night, with the majority of activity moving out of southern Wisconsin by early Saturday morning.
While a significant improvement in conditions is anticipated for Saturday, it’s important to note that an isolated non-severe shower remains a possibility during the afternoon.
Looking ahead to the weekend, another round of unsettled weather is on the horizon.
Showers and thunderstorms may develop on Sunday and are predicted to persist into Tuesday of next week.
The Onset of a Significant Heatwave
Beyond the persistent storm threats, a more substantial meteorological shift is poised to occur next week: a significant warming trend and a rise in humidity.
Temperatures are expected to climb considerably, transforming the local climate from the comfortable low 80s seen early in the week to an oppressive low 90s by late week.
The Growing Threat of Dangerous Heat Index Values
This combination of soaring temperatures and high humidity is particularly concerning.
By midweek next week, specifically on Wednesday, Thursday, and Friday, the atmospheric conditions are predicted to create a dangerous situation.
The calculated heat index values could push near 100°F.
This means that while the actual air temperature might be in the upper 80s and low 90s, the “feels like” temperature, influenced by humidity, will be significantly higher.
The National Weather Service emphasizes that heat index values at this level pose a serious risk of heat-related illnesses for individuals exposed to prolonged periods outdoors, especially those with pre-existing conditions or those who are not accustomed to such heat.
It is imperative to take proactive measures to stay cool and hydrated.
Key Takeaways and Preparations
Southern Wisconsin residents should brace for a multifaceted weather scenario.
- Storms: Expect showers and thunderstorms late Thursday continuing into Friday morning.
- Friday afternoon and evening carry the risk of strong winds and hail, warranting an Alert Day designation.
- Weekend & Early Week: More unsettled weather with showers and storms is forecast for Sunday and into Tuesday.
- Heatwave: A substantial increase in temperature and humidity will lead to potentially dangerous heat index values approaching 100°F from Wednesday to Friday of next week.
Daily forecasts indicate Thursday reaching around 85°F with a 60% rain chance.
Friday will be near 81°F with a high 90% chance of rain.
Saturday is expected to be drier but warm around 85°F.
By midweek next week, expect highs in the upper 80s to low 90s.
Very high UV indices and only modest rain chances are expected.
Prepare for muggy conditions and remain vigilant for the potential of isolated severe storms on Friday.
Plan for the escalating heat and humidity that will dominate the latter half of next week.
Here is the source article for this story: Storms begin later Thursday, ALERT DAY Friday