All data that myPWS displays comes from the Weatherunderground data server and ultimately from your weather station. Therefore, we cannot analyse, comment on or understand the correctness of this data.

If you believe that data is incorrect, then you should check your weather station and how it is sending data to Weatherunderground. Furthermore, you can contact Weatherunderground directly if you are sure that your weather station is working correctly and report that the software interface is delivering incorrect or incomplete data.