An unsettled weather pattern will take hold of the Baton Rouge Area through this weekend, bringing relief from summer heat, but ongoing humidity and increased rain. Though widespread problems are not expected, downpours from thunderstorms could cause localized street and poor drainage flooding.

Rounds of Showers & T-Storms: persist through the weekend, not a constant rain

Weekend Plans: can work around the stormy weather, take ponchos and rain boots

Flooding: not major, nuisance issues in low-lying areas

Tonight and Tomorrow: Much like a summer day, showers and thunderstorms will wrap up with a loss of daytime warming into the evening hours. Some clouds will hold on as low temperatures stop in the low 70s. It will feel muggy. On Friday, tropical moisture moving in from the Gulf will set the stage for another warm, humid day with highs in the low 90s. After some sunshine helps warming, scattered showers and thunderstorms will flare up with 60 percent of the 13 Parish, 2 County Forecast Area picking up rain—especially during the afternoon. Any stronger storm could produce quick bursts of heavy rain and gusty winds.

High School &  College Football

• Friday Night: Fans heading out to high school games should take some rain gear as a precaution. Though trending down, some leftover showers and thunderstorms will linger into the evening, which could cause a few delays before all games eventually finish.

• Saturday (LSU & Southern): If you are spending several hours on either campus this weekend, rain gear, a poncho, and shoes you don’t mind getting wet or muddy are a must! It will not rain all day but the threat of off-and-on showers and thunderstorms will persist. It is too early to tell if thunderstorm activity will cause delays to games, though right now, the afternoon looks like the busiest time. On the other hand, the day won’t be as hot as previous games due to clouds and showers, but it will be very humid.

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Up Next: Into the weekend, a tropical wave moving northwest out of the Caribbean will team up with a slow-moving cold front pushing in from the west. As these features converge, a metric called precipitable water, which tells how much moisture is in the atmosphere, will be near record values for early October. In total, this all means some locations could experience heavy rain at times through Sunday. Here are the key takeaways:

• Rain Coverage: Rain coverage jumps to 80% Saturday and Sunday, meaning many locations will get rain at some point each day, a few spots could miss out. Rain is expected to come in rounds, so neither day will be a total washout, and dry time will be available.

• Rain Totals: Most of the Capital Area can expect 2 to 4 inches of rain through Sunday. Relative to Baton Rouge, generally lower amounts are expected north and west and higher amounts are expected south and east.

• Flood Concerns: Beyond the baseline rain totals, isolated intense rainfall rates could top 4 inches per hour in small point locations during thunderstorms. Rain coming down that fast would easily overwhelm street storm drains and ditches, leading to water ponding on roads and localized flash flooding in low-lying spots or underpasses. Local rivers and bayous are currently very low, meaning they have plenty of room to absorb runoff.

By Monday, the main weather system will drift into the Gulf. Highs will settle in the mid-80s with morning lows dipping into the upper 60s by Tuesday. Slightly lower humidity will help bump rain coverage back into the 20–30% range. Some even cooler temperatures become possible by the end of next week with lows in the low 60s and highs in the low 80s. 

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The Tropics: The Atlantic Basin remains quiet for as far as Louisiana in concerned. The remnants of former Tropical Storm Fay sit several hundred miles southeast of Bermuda and face strong upper-level winds alongside dry air. The National Hurricane Center gives this system only a 10% chance of development over the next seven days, and it poses zero threat to the Gulf of Mexico.

– Josh 

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