Forecast Discussion: Heat Continues as We Track Increasing Storm Chances for the July 4th Weekend
Summer weather remains firmly in place across Southwest Arkansas as hot and humid conditions continue through the remainder of the week. Afternoon temperatures will climb well into the 90s each day, while heat index values will frequently reach the lower 100s. Although the heat will remain the primary concern through midweek, rain chances will gradually increase beginning Wednesday as the upper-level ridge shifts eastward. Scattered afternoon and evening showers and thunderstorms will become more common heading into the Independence Day weekend. At this time, the Fourth of July is not expected to be a washout, but outdoor plans may have to contend with isolated thunderstorms during the afternoon and evening hours.
Heat Continues Through Midweek:
An upper-level ridge centered over the Tennessee and Kentucky region continues to dominate much of the eastern United States. Southwest Arkansas remains along the western edge of this ridge, allowing temperatures to remain well above average.
Daily highs will reach the lower to middle 90s, with humidity pushing afternoon heat index values into the 100° to 105° range. A few isolated locations could briefly exceed those values during the hottest part of the afternoon.
While widespread Heat Advisories may not be necessary for every location, the heat will still pose a risk for anyone spending extended periods outdoors.
Stay hydrated throughout the day, and take frequent breaks in the shade or air conditioning. Avoid strenuous outdoor activities during the afternoon if possible. Never leave children or pets inside parked vehicles.
Some lingering Saharan Dust may also remain over the region through midweek, which could slightly reduce storm development while contributing to hazy skies.
Rain Chances Increase: The weather pattern will begin to shift as the upper ridge slowly weakens and moves farther east. This will allow Gulf moisture to return northward into Arkansas while disturbances move around the edge of the ridge.
Beginning Wednesday, isolated afternoon thunderstorms will begin developing across portions of the region. By Thursday through the holiday weekend, scattered showers and thunderstorms will become more common, especially during the afternoon and evening hours as daytime heating reaches its peak.
This is a typical summertime pattern, meaning many locations will remain dry while others receive brief heavy downpours.
At this time, widespread severe weather is not expected. Rainfall should be localized rather than widespread. Most storms will produce brief heavy rain, lightning, and gusty winds before dissipating.
Forecast confidence decreases toward Sunday and early next week, although guidance suggests a somewhat more active pattern could develop with more widespread shower and thunderstorm coverage.
Independence Day Forecast: The current forecast for the Fourth of July calls for hot and humid conditions. High temperatures in the lower to middle 90s, with heat index values near or above 100°. Scattered afternoon and evening showers and thunderstorms.
The day certainly won't be a washout, and many communities may stay completely dry. However, anyone with outdoor celebrations, cookouts, or fireworks plans should be prepared for a few pop-up thunderstorms and continue checking the forecast as we get closer to the holiday.
Looking Ahead: Early indications suggest the upper ridge will continue weakening into early next week, allowing rain chances to remain elevated across portions of the region.
While additional cloud cover and scattered storms may provide temporary relief from the heat, temperatures are expected to remain above normal well into next week.
Southwest Arkansas Weather Bottom Line: Hot and humid conditions continue through the week with highs in the 90s. Heat index values will frequently reach the lower 100s. Isolated afternoon storms return Wednesday. Scattered summertime thunderstorms become more common Thursday through the holiday weekend. The Fourth of July looks hot and muggy with a chance for afternoon and evening pop-up storms, but it is not expected to be a washout. Continue practicing heat safety and check back for forecast updates as holiday plans approach.
