10/08/2026
HURRICANE ISAIAS: THURSDAY AFTERNOON UPDATE
The latest information we have shows increasing confidence that the remnants of Hurricane Isaias will bring heavy rain and strong winds to Southeast Tennessee this weekend. There are some significant changes from yesterday’s forecast, particularly concerning wind speeds.
Here’s what we’re expecting:
RAIN: Widespread moderate to heavy rainfall is expected Saturday into Saturday night. Rain should begin Saturday morning across the southern Tennessee Valley and spread north during the afternoon.
Rainfall totals of 1–2 inches are expected across much of the southern Tennessee Valley and Cumberland Plateau, with locally higher amounts possible. The current forecast calls for approximately 2.1 inches in Chattanooga.
A Flood Watch is now in effect from Saturday morning through Sunday morning for portions of far Southeast Tennessee and southwest North Carolina. Isolated flash flooding will be possible, particularly in areas that receive heavier rainfall.
WIND: This is the part of the forecast that has changed most significantly.
Wind gusts of 60–80 mph are now possible across the East Tennessee mountains and foothills, where a High Wind Watch has been issued.
Elsewhere, including portions of the Cumberland Plateau, gusts of 30–40 mph or greater are possible.
The strongest winds are currently expected Saturday morning into Saturday afternoon. Winds of this magnitude in the higher elevations could bring down trees and power lines and cause power outages.
TIMING: Saturday looks to be the primary day for impacts across our region, with heavy rain continuing into Saturday night. The strongest winds are expected earlier in the day, while the flooding threat could continue into Sunday morning.
BOTTOM LINE: Confidence is increasing that Isaias will have a noticeable impact on our weather this weekend. Heavy rainfall and the potential for localized flooding are important concerns. Strong winds will be an additional concern, especially in the mountains, foothills and higher elevations.
If you have outdoor plans Saturday, now is the time to consider alternatives. It’s also a good idea to secure loose outdoor items, check flashlights and make sure you have a way to receive weather alerts.
This forecast is still subject to change as the system moves inland. I’ll continue monitoring the latest information and provide additional updates as we get closer to Saturday.