TD2 has formed in the Atlantic (Advisory #1)

cross-posted from: https://lemmy.world/post/49637283

Tropical Depression Two has officially formed in the northeastern Gulf of Mexico, developing a clear circulation but remaining relatively weak and spread out with maximum sustained winds around 30 mph. Dry air and nearby wind patterns are currently slowing down its development, but a Hurricane Hunters flight is scheduled for later today to gather more precise data on its structure. The system is currently drifting slowly northwestward due to weak steering currents, and it is expected to gradually strengthen into a tropical storm over the next day or two as it approaches the Florida Panhandle.

Looking further ahead into the middle and latter parts of the week, the storm is projected to turn toward the west or west-northwest, tracking near or across the Gulf Coast toward Alabama, Mississippi, Louisiana, and Texas. The exact amount of intensification remains highly uncertain, as it depends heavily on how close the center stays to land versus remaining over the warm waters of the Gulf.

The primary hazards at this stage are wind and heavy rainfall. A Tropical Storm Watch has already been issued for portions of the Florida Panhandle, and residents further west along the Gulf Coast should monitor the storm closely since additional watches may be required soon. Furthermore, widespread heavy rainfall is expected to bring the potential for flash flooding through Thursday along the eastern and central Gulf Coast, stretching all the way from western Florida to southern Louisiana.

This intensity model guidance shows a strong consensus that Tropical Depression Two will steadily strengthen into a tropical storm over the next 24 to 48 hours as most lines cross into the green tropical storm zone. The majority of the computer models project the system peaking in strength between 36 and 60 hours from now, with maximum winds topping out mostly between 35 and 45 knots. After that peak period, nearly all of the tracking lines trend sharply downward, reflecting the expected weakening of the storm as it interacts with the Gulf Coast landmass later in the week.

This spaghetti model map shows the individual computer model tracks for Invest 91L, which has now officially become Tropical Depression Two. The initial clustering shows excellent agreement that the system will loop tightly near the Florida Panhandle over the first 48 hours, though a couple of outlier tracks pull it slightly inland or farther east. After that initial period, the lines begin to spread out considerably as they trend westward along the Gulf Coast, highlighting the forecast uncertainty. Most models agree on a path hugging or crossing the coastlines of Alabama, Mississippi, and Louisiana, with several key tracking aids like HCCA, TVCN, and GDMI taking the system deeply into Texas by the end of the five-day period.

The National Hurricane Center forecast track shows Tropical Depression Two moving slowly northwest toward the Florida Panhandle, where a tropical storm watch is currently highlighted in yellow. By Monday evening, the system is expected to strengthen into a tropical storm—indicated by the "S" markers—before taking a sharp turn toward the west. It is projected to crawl along or just off the coastline of Alabama, Mississippi, and Louisiana through mid-week, eventually heading toward Texas by Friday morning. The widening white cone represents the growing uncertainty in the storm's exact path over the next five days, especially as it interacts with the Gulf Coast.

This snapshot of the European (ECMWF) model forecast for Tuesday highlights a distinct low-pressure system sitting just south of the coast with a central pressure of 1004 millibars. The vibrant green and yellow shading on the eastern side of the system indicates a concentrated zone of stronger winds pushing directly into the Florida Panhandle near Panama City. Because the American (GFS) model struggles to show any development from this system at all, this visual highlights a notable disagreement between the major global models regarding the exact strength and placement of the storm's wind field.