The phrase "almost unpredictable" is correct and usable in written English.
It can be used to describe a situation or outcome that is very difficult to foresee or anticipate, but not entirely impossible to predict.
Example: "The weather in this region is almost unpredictable, making it challenging to plan outdoor events."
Alternatives: "nearly impossible to predict" or "hardly foreseeable".
"Today's sad occurrence was almost unpredictable in nature," he said.
"It's unprecedented so it's almost unpredictable," said Susan J. Carroll, a professor of political science at the Center for American Women and Politics at the Eagleton Institute of Politics at Rutgers University.
Nonlinear effects make the behavior of the fluid complicated and render it almost unpredictable.
In using the methods outlined in this study, we found that ΔS° appears almost unpredictable.
We found that TΔS° appears almost unpredictable, with an analysis of our results in the context of further data from the literature suggesting that its poor predictability – and, to a lesser extent, that of ΔH° – is explained by a stronger dependence of those quantities on the complex's structural details, and to a lesser extent on the wider experimental error.
Furthermore the interactions of these complex ecological factors are strongly influenced by environmental conditions, such as temperature and rainfall, making the WN outbreak occurrence almost unpredictable.
His ex-wife, Nicole, exhibited an almost mythic devotion and was in some ways even braver, for she was more vulnerable in the world's most unpredictable regions.
My work is almost always unpredictable.
The brief, and almost wholly unpredictable, moments of decongestion almost make things worse.
Her figurative language can get almost as unpredictable as her on-again, off-again euphonies and near rhymes: today-they, mania-pain, on-run-sun; "hurricane and/ether".
Anniversaries can say a lot about a country particularly one like Russia where the past is almost as unpredictable as the future.
