User Tools

Site Tools


podcast:ddop:public:episode_201829

Episode 2018-29 - Misc Weather Topics

Hello and welcome to the next edition of the Mike Wills Podcast! This is the Dog Days of Podcasting edition for August 29, 2018 where I am taking you through some of the basics of weather, storms, and radar.

{Local weather update}

Notes

    • The WSR-88D is one of the most powerful and advanced Weather Surveillance Doppler Radar in the world. Since first being built and tested in 1988, it has been installed and used operationally at over 160 locations across the United States, including Alaska and Hawaii.
    • In summary, when the radar is in clear air mode, radar images on the internet will be updated approximately every ten minutes. In precipitation mode, the updates will occur around five to six minutes apart.
    • The colors are the different echo intensities (reflectivity) measured in dBZ (decibels of Z) during each elevation scan. “Reflectivity” is the amount of transmitted power returned to the radar receiver. Reflectivity (designated by the letter Z) covers a wide range of signals (from very weak to very strong). So, a more convenient number for calculations and comparison, a decibel (or logarithmic) scale (dBZ), is used.
  • What Causes the Sky to Turn Green Before a Thunderstorm?
    • The effect of the green sky is usually observed with thunderstorms that occur later in the day when the sun angle is lower. The low sun angle causes the reddish tint to the sky that can often be seen as the sun sets on the horizon. At the same time, water droplets primarily scatter the blue wavelength. This blue color with a reddish color background causes a greenish tint to the sky. Source

Link/Picture of the Show

None

Wrap Up

Thank you for listening and remember to always watch the clouds and be weather aware.

Contact Information

podcast/ddop/public/episode_201829.txt · Last modified: 2018/11/22 14:30 (external edit)