The phrase "a notable observation" is correct and usable in written English.
It can be used when you want to highlight an important or significant point that has been noticed or remarked upon.
Example: "During the meeting, she made a notable observation about the project's timeline that caught everyone's attention."
Alternatives: "a significant remark" or "an important note".
It was a notable observation, she said, from a "law and order" man.
A notable observation drawn from a long-time operation indicates the CH3I treatment strongly restrained the formation of HCOOH that had gradually increased with time-on-stream (TOS).
A notable observation is that the power factor and the thermal conductivity of electrodeposited tellurium films have the same order of magnitude of bismuth telluride films grown by electrodeposition.
A notable observation in management's commentary was the company's focus on custom applications.
A notable observation is that the evolved geometry for the nonlinear case has a dominant wavelength present that is approximately half the size of the analytical result.
A notable observation is the qualitative resemblance between the thermomechanical response of PNCs and that of polymer thin films confined between planar surfaces [11 13].
However, an notable observation is the variation in the performance of a particular cache replacement policy as the scope distribution varies from one extreme to the other (i.e. 1.0SV/0.0LV to 0.0SV/1.0LV).
A more notable observation in these findings is that the often reported inverse association between adult body mass index (BMI) and risk is attenuated, and no longer statistically significant, after adjustment for childhood fatness.
A second notable observation is that the tomato fruit PG (TFPG) is more closely associated with the abscission and dry fruit dehiscence PGs than with the tomato PGs involved in organ abscission.
Turning to the CBOE Market Volatility Index (VIX), I have a few notable observations.
Another notable observation was the relatively small change in A that resulted from a two-fold increase in r.
