And this situation (Equal/close Temp and Dp) should start to ring loud bells with flashing red lights in the minds of N European pilots seeing them in the Met brief.
This is the fine edge of forecasting, and beyond what is realistically achieveable. (To be fair, predicting the minutrest change in Temp, Pressure or Dew point must be almost impossible, for a tiny change in only one of these can make a T6K Ovc 0700 TAF turn into 0050 /// at minutes notice).
Thus under such a forecast, disbelieve any wx prediction as "fact" and plan your fuel and diversion accordingly.
Or you'll get caught one day...