HEADLINES
– A mid-level low will pivot eastward and finally weaken today.
– It brought some flooding from around Bloomington to Terre Haute.
– Showers and some storms mainly east and southeast of Indy today.
– Hot and humid again by weekend. Next big storm chance is later Sunday.
TODAY’S MAP
NWS TECHNICAL DISCUSSION
A brief lull in activity is possible before renewed destabilization allows for showers and storms to regenerate during the afternoon hours. The MCV/Mid-level low both appear weaker, so coverage is probably not going to be as much as it was yesterday. Corfidi upshear vectors are still slow, so storms may slow down and back- build if they persist long enough to form a cold pool. Precipitation chances are best across the central and southern parts of our CWA. Continued low-level easterly flow across the northeastern portions will allow more stable air to filter in, reducing the precip chances somewhat. As for temperatures, today will be a bit warmer than yesterday by a few degrees. Increasing humidity is also expected, especially further north where dry air was present much of the day yesterday. Look for highs in the mid 80s. After sunset, shower/storm activity will again diminish with some patchy fog possible. Slightly warmer lows are expected due to increasing humidity. && .LONG TERM (Wednesday through Monday)... Issued at 258 AM EDT Tue Aug 5 2025 No major changes were noted within long term ensemble guidance. Our previous forecast philosophy remains and the previous discussion will be retained. -----------Previous Discussion----------- Strong ridging aloft will remain anchored over the southern Rockies and High Plains while a weakness in the flow lingers downstream across the eastern Midwest and Ohio Valley through midweek. Isolated to scattered afternoon and evening convection will persist on Wednesday across the region but as the weakness diminishes and ridging expands east late week...convective chances will decrease into the weekend along with an increase in heat and humidity. A more focused and widespread threat for convection will arrive by the end of the weekend and into early next week in response to an approaching cold front dropping out of the upper Midwest and becoming nearly stationary over the region. Tuesday Night and Wednesday A weak but persistent level of troughiness aloft on the lee side of the ridge will remain across the Ohio Valley through Wednesday gradually shifting eastward. This will maintain isolated to scattered convection across especially the southeast half of the forecast area into Wednesday with a continued risk for slow moving localized downpours that generally remain subsevere during peak heating. However any stronger cell with a collapsing downdraft will carry a localized gusty wind threat. Highs will climb into the mid 80s Wednesday with humidity levels slowly ticking up as well as progressively deeper moisture advects into the region. Wednesday Night through Monday Heights aloft will respond to an expansion of the ridging to our west late this week into the weekend resulting in a resumption of the late July hot and humid regime albeit with temperatures and humidity levels not quite as high as experienced last week. Highs will rise into the upper 80s and lower 90s Friday through Sunday with dewpoints near or above 70 degrees which could bring peak heat indices into the upper 90s over the weekend. The presence of deep low level moisture and ample instability will keep the risk for isolated afternoon and evening convection in play but overall daily coverage will decrease with the development of a mid level cap and the loss of forcing aloft. By late weekend into early next week...a cold front will shift south towards the region. While this would provide increased forcing aloft for more widespread and robust convection... there remain hints in the long range guidance at the front becoming nearly stationary to our north across the lower Great Lakes through much of next week as it runs into the ridging further south. This would keep a warm...humid and unsettled pattern across the Ohio Valley with any substantial cooldown coming from a frontal passage being delayed until late next week at the earliest.
INDY SEVEN DAY FORECAST
Today: Becoming partly sunny and warmer. Humidity increases. Spotty showers possible in the morning. Spotty showers and storms possible in the afternoon. High 84.
Tonight: Partly cloudy. Spotty showers or storms possible. Low 66.
Wednesday: Mostly sunny. High 85.
Wednesday Night: Mostly clear. Low 67.
Thursday: Mostly sunny. High 87.
Thursday Night: Mostly clear. Low 68.
Friday: Mostly sunny. High 88.
Friday Night: Mostly clear. Low 70.
Saturday: Mostly sunny, hot and humid. High 89.
Saturday Night: Mostly clear. Low 71.
Sunday: Partly cloudy. Scattered showers and storms by late afternoon. High 89.
Sunday Night: Scattered showers and storms. Low 71.
Monday: Partly to mostly cloudy, with scattered showers and storms. High 88.
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