Jacksonville woke up to cloudy skies and swamp-like humidity early on Saturday, June 20, with temperatures lingering in the low 70s. Scattered morning showers are expected to grow into more widespread afternoon thunderstorms, with the most active stretch targeting the midday and late afternoon hours. Brief heavy rain, frequent lightning and gusty winds could slow the afternoon commute and wreck a lot of outdoor plans.
Afternoon Storms And Timing
Showers and thunderstorms are expected to fire between about 11 a.m. and 5 p.m. on Saturday, June 20, with storms favored through the afternoon before gradually tapering later tonight. Highs will be near 88°F, then slip to around 83°F later in the day as clouds and rain take over. The chance of precipitation is near 80 percent, and most neighborhoods could pick up roughly a half-inch to three-quarters of an inch of rain. Factor in the humidity and it will feel hotter than the thermometer, with heat index values pushing into the low 100s, according to the National Weather Service Jacksonville.
Flood, Wind And Heat Risks
Forecasters say the main hazards will be gusty winds and frequent lightning, with isolated stronger cells capable of producing pockets of damaging gusts and locally heavy downpours. While most of Jacksonville should land in that half-inch to three-quarters of an inch rain range, areas that were soaked on Friday, especially inland Southeast Georgia, could see significantly higher totals, and a Flood Watch remains in effect through this evening. If you live in low-lying or flood-prone neighborhoods, avoid driving through standing water and give creeks and small streams time to fall, according to the NWS Jacksonville.
Commute, Beaches And Practical Tips
Expect slick roads and sudden downpours during the afternoon drive. Leaving a little earlier, slowing down through puddles and giving extra space between cars can help cut the risk of hydroplaning when the heaviest bursts hit. Out at the beaches, rip-current risk is expected to stay generally low with surf around 1 to 2 feet, but lightning can shut down lifeguarded areas in a hurry, so check conditions and radar before you head out. For background on the stretch of stormy weather leading into this weekend, see our earlier coverage on how the stormy week kicks off with flood fears.
Looking Ahead
Rain chances should ease on Sunday, but the heat is ready to take center stage next week. Highs climb into the low 90s on Sunday and into the mid 90s by Monday, with heat index values possibly topping 105 early next week. That combination could support Heat Advisory conditions Monday and Tuesday, so vulnerable residents should plan ahead to stay cool, hydrated and in touch with local guidance. Keep an eye on updates from NWS Jacksonville for any changes to watches or advisories.
