Tropical depression may form in the Gulf as Invest 91L moves northward
Even *** tropical storm by the midweek into the next week. There are no direct impacts for us here in South Florida, but we should see some increased rainfall across the northern Gulf Coast states from Louisiana all the way into Mississippi to Alabama and northern Florida. So again, something we’re gonna be watching. The next name on the list is Bertha. 91L latest computer models do take this *** little further west and then eventually some uncertainty there. So once we get that defined circulation, then we’ll get *** better idea. And grasp of it where exactly this could be impacting land directly, but for now, if the National Hurricane Center thinks that the hurricane hunters should head out, the timing of that will take place sometime tomorrow. That’s when they start those missions. For now we have high pressure off towards the west in the Gulf. We have high pressure to our east, of Bermuda high, so that area of low pressure is going to be sandwiched between two areas of high pressure. So that’s why the steering will take it away from us here in southern Florida. So again, just. That we’re going to be monitoring for the next couple of days, but for now, heavy rain just moving up to the north there from Alligator Alley. We have some storms offshore into the Gulf right there. Locally though, not as much rain as what we had *** little earlier today. We saw some downpours, and thunderstorms, down to *** couple of showers from Fort Drum just to the north of Bluefield and then right between portions of Indian River County, Saint Lucie, and Okeechobee County. I do think most of this evening will stay mainly dry for some of our coastal areas. Any rain coming in will be moving in from the south. And that’ll be the trend as we head into your Sunday. So Sunday morning we can’t roll out *** couple of coastal showers. By the afternoon though, the trend takes it further inland with just *** few storms there along the Treasure Coast. So *** little bit drier for your Sunday, *** little bit drier for your Monday, Tuesday. In fact, even drier by Wednesday, Thursday, we’ll see *** little bit of the Saharan dust work its way back in, limited rainfall for the area, and then garden variety of any shower and storm activity will stay mainly inland, closer to Lake Okeechobee and the western half of the state, so. And not real big significant rainfall chances for us here, although you’ll notice *** little breeze kicking in. Winds gusting anywhere into the 20s, so we’ll have *** strong easterly wind by Monday to Tuesday. 88 right now with it feels like temperature in the triple digits for the Treasure Coast. Same story as you head down to the Palm Beaches. *** chunk of us feeling still like the mid 90s, even with the extra cloud coverage. It’ll feel like the triple digits for some spots through at least 6 to 7 o’clock tonight. Temperatures in the low 80s through the overnight hours, but it will feel as muggy as the 90s in the morning. No heat advisories issued just yet, but Nikki Sheiks will let you know tomorrow morning if we do have any heat advisories issued or impact weather for your Sunday. Beach and boating for tomorrow. Look for that southeasterly wind around 5 to 15 knots. Take *** look at your first morning weather 7 day forecast on Sunday, as mentioned, just *** couple of showers could see some coastal rain in the morning. By the afternoon, mainly inland, meaning it’s going to be. Hot and steamy temperatures will feel like the triple digits, feeling over 100 plus degrees. If we do have temperatures feeling over 105 to up to 108 for extended periods of time, that’s when *** heat advisory may be issued. But for now, none for the area. No impact weather for the next several days. Monday, breezy at times. Winds will continue to gust by the midday afternoon into the 20s, so just be on the lookout for that breezy conditions for your Tuesday. Otherwise temperatures hot and steamy in the 90s for the.
Updated: 7:56 PM EDT Jul 18, 2026
Editorial Standards ⓘ
Tropical depression may form in the Gulf as Invest 91L moves northward
Updated: 7:56 PM EDT Jul 18, 2026
Editorial Standards ⓘ
A tropical disturbance off Florida’s west coast is designated as Invest 91L with a greater chance of development, including a depression in a few days, the National Hurricane Center said Saturday afternoon. Tropical AtlanticNorthern Gulf of America and near Florida The system stretches from the northeastern Gulf to just off the coast of northern Florida. The disturbance is now designated as Invest 91L by NHC, which is when forecasters want to take a closer look at the possibility of future development. The L is for activity in the Atlantic Basin. In the 8 p.m. update, the NHC raised chances of development to 40% from 30% over the next two days and 50% from 40% over the next seven days from the 2 p.m. posting. In the 8 a.m. update, it was listed as 20% over two days and 30% over seven days before it was designated as Invest 91L.”Gradual development of this system is possible, and it could become a tropical depression while it moves slowly northward or north-northwestward during the next few days,” NHC said. “Interests along the Florida Gulf coast, southern Alabama, and southwestern Georgia should monitor the progress of this system as it is expected to bring heavy rain to portions of that region during the next several days.” If Invest 91L becomes a named storm, it would be Bertha. Tropical Storm Arthur was the first named storm of the 2026 Atlantic hurricane season. Arthur formed in the northwestern Gulf of Mexico on June 17.“Satellite images and surface observations indicate that a broad surface low is located over the eastern Gulf of America,” NHC said. “The associated winds are currently light, and the shower and thunderstorm activity remains disorganized.”An Air Force Reserve reconnaissance aircraft is scheduled to investigate the system on Sunday, if needed, NHC said.Tracking the tropicsStay with WPBF 25 on air and online for updates.Interactive radarSevere Weather Alerts Download the WPBF 25 News app for the most up-to-date weather alerts.
A tropical disturbance off Florida’s west coast is designated as Invest 91L with a greater chance of development, including a depression in a few days, the National Hurricane Center said Saturday afternoon.
Hearst Owned
Tropical Atlantic
Northern Gulf of America and near Florida
The system stretches from the northeastern Gulf to just off the coast of northern Florida.
The disturbance is now designated as Invest 91L by NHC, which is when forecasters want to take a closer look at the possibility of future development. The L is for activity in the Atlantic Basin.
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In the 8 p.m. update, the NHC raised chances of development to 40% from 30% over the next two days and 50% from 40% over the next seven days from the 2 p.m. posting. In the 8 a.m. update, it was listed as 20% over two days and 30% over seven days before it was designated as Invest 91L.
Hearst Owned
“Gradual development of this system is possible, and it could become a tropical depression while it moves slowly northward or north-northwestward during the next few days,” NHC said. “Interests along the Florida Gulf coast, southern Alabama, and southwestern Georgia should monitor the progress of this system as it is expected to bring heavy rain to portions of that region during the next several days.”
If Invest 91L becomes a named storm, it would be Bertha.
Tropical Storm Arthur was the first named storm of the 2026 Atlantic hurricane season. Arthur formed in the northwestern Gulf of Mexico on June 17.
“Satellite images and surface observations indicate that a broad surface low is located over the eastern Gulf of America,” NHC said. “The associated winds are currently light, and the shower and thunderstorm activity remains disorganized.”
An Air Force Reserve reconnaissance aircraft is scheduled to investigate the system on Sunday, if needed, NHC said.
National Oceanic and Atmospheric Administration
Stay with WPBF 25 on air and online for updates.
Download the WPBF 25 News app for the most up-to-date weather alerts.
Weather Information
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