TROPICAL DEPRESSIONTD

Tropical Depression Isaias

Last tracked
Map: Tropical Depression Isaias

Tropical Depression Isaias was last tracked about 42 km (26 mi) north of London, Kentucky on October 11, 2026 at 15:00 UTC, with maximum sustained winds of 20 knots (23 mph, 37 km/h). NASA’s tracking ended after 4 days.

It traveled about 2,190 km (1,361 mi) over its life, and its strongest winds were 105 knots (121 mph, 194 km/h) on October 9.

StrengthTropical Depression
Max winds23 mph · 37 km/h
Position37.5°N 84.0°W
Peak121 mph · Oct 9
Tracked for4 days
Distance2,190 km · 1,361 mi
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Intensity over its life

Tropical stormCategory 1Category 3 (major)Category 503877115153Oct 7Oct 9Oct 11Maximum sustained winds (knots)

Seen from space

Satellite picture, Satellite view · October 13, 2026
Satellite view · October 13, 2026

True color from the VIIRS instrument on the NOAA-20 satellite. The ring marks where the event was reported. Pictures: NASA Worldview (GIBS) from the daily satellite passes; clouds can hide the ground on some days.

The Saffir-Simpson scale

Hurricanes are rated 1 to 5 by their strongest sustained winds.

CategoryWindsDamage
174–95 mph119–153 km/hVery dangerous winds will produce some damage
296–110 mph154–177 km/hExtremely dangerous winds will cause extensive damage
3111–129 mph178–208 km/hDevastating damage will occur (a major hurricane)
4130–156 mph209–251 km/hCatastrophic damage will occur
5157 mph or higher252 km/h or higherCatastrophic damage; most of the area uninhabitable for weeks or months

Hurricane, typhoon or cyclone?

They are the same kind of storm: a spinning, warm-core system that feeds on warm ocean water. Over the North Atlantic and the eastern and central North Pacific it’s a hurricane; over the western North Pacific a typhoon; over the Indian Ocean and the South Pacific a cyclone. Below 39 mph (63 km/h) it’s a tropical depression.

For official forecasts and warnings, follow your national weather service (in the U.S., the National Hurricane Center).

Did you know?

Why they weaken over land. Hurricanes usually weaken quickly after landfall because they lose their supply of warm ocean water.

More: every tropical storm · all events

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