Quiz 2 1.Radar Mode for the small image: Conventional, Doppler or Dual Polarized? Hint, the large image is Doppler. Conventional, Doppler Dual Polarized 2.What conceptual model does the image relate to? Pick from the list of possible options. Ahead Warm Front Downstream from Col Ahead Warm Front Under Col Behind Cold Front Right of Col Behind Cold Front Left of Col 3.What is the short range forecast for point? Sunny-No Rain A BAB Rain Increasing A BA B Rain Decreasing A BAB Questions Home AB

Quiz 2 Return To Questions Analysis & Diagnosis 2 Yes, it certainly is a Conventional radar image. The shades depicted transition from the minimum value to the lightest blue which are completely enveloped by the less intense shades. This is characteristic of a conventional radar precipitation intensity display. You are correct! Congratulations

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 3 Sorry… that is not the answer we were looking for… Sorry… the colour scheme does not relate well to precipitation velocity (Doppler radar) which would require a dramatic shift in colours across the display. A Doppler field totally convergent on the line would be odd if not impossible or precipitation phase/shape (dual polarized radar) might be possible but again odd with a distinctly different type of hydrometeor along a line. Hint! Think simple, basic radar data.

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 4 Yes, this image is located behind a cold front to the left of the col with a backing wind pattern as revealed by Doppler radar. The low level wind within the CCB is northwesterly so the surface cold front has just passed east of the radar. The zero line backs with height northwest of the radar indicating cold advection and above the cold frontal zone, an anabatic cold front. You are correct! Congratulations

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 5 Sorry… that is not the answer we were looking for… Sorry… Ahead Warm Front Downstream from Col doesn’t compute. The boundary is oriented northeast to southwest which is odd for a warm front. As well, the winds above the low level boundary back. In the above conceptual model they should veer. It is not the right conceptual model.

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 6 Sorry… that is not the answer we were looking for… Sorry… Ahead Warm Front Under Col… under a col, the winds must diverge. The winds do back with height to the left of the radar site but the winds don’t veer much to the right of the radar so the pattern is not divergent enough to be under a col. If anything it must lie to the left of the col. The real problem is the orientation of the boundary and that there is CAA in the lowest levels under the boundary. Try again.

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 7 Sorry… that is not the answer we were looking for… Sorry… Behind Cold Front Right of Col… To the right of the col the winds must veer with height. These do not so the conceptual model is not a fit… but it does look like a cold front for sure. The orientation of the boundary is northeast to southwest, perfect for a cold front and consistent that there is CAA in the lowest levels under the boundary. Close but not quite right. Try again.

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 8 Sorry… that is not the answer we were looking for… Sorry… “Sunny No Rain” for A doesn’t compute. There is at least overcast cloud producing the precipitation being sensed by Doppler and the noted boundary is still on the way. Good sense of humour though – one must laugh! AB

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 9 Sorry… that is not the answer we were looking for… Sorry… “Sunny No Rain” for B doesn’t compute. There is at least overcast cloud producing the precipitation being sensed by Doppler. In fact, it is likely significant rain with the anabatic cold front but the end is probably not far to the west. Good sense of humour though – one must laugh! AB

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 10 Yes. “Rain increasing” for A does compute since the significant rain hasn’t really started yet. The cold frontal precipitation is on the way. Remember that this is the anabatic part of the cold frontal model with the winds backing above the cold frontal zone.. You are correct! Congratulations AB

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 11 Sorry… that is not the answer we were looking for… Sorry… “Rain increasing” for B doesn’t compute. The rain should be at about the maximum intensity under the anabatic portion of the cold front. The precipitation could still remain significant but probably not increase much. Remember of course that this is an idealized, perfect world answer… not all simple answers can be right for these simplified questions. AB

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 12 Sorry… that is not the answer we were looking for… Sorry… “Rain decreasing” for A doesn’t compute since the significant rain along the anabatic cold front hasn’t really started yet. The precipitation sensed by the Doppler is unlikely to be virga in the warm sector of the system. How would you check to see if this is true? Conventional radar cross-section perhaps or even a look at an observation? Good sense of humour though – one must laugh! AB

Questions Home Quiz 2 Return To Questions Analysis & Diagnosis 13 Yes. “Rain decreasing” for B does compute! The rain should be decreasing from its maximum intensity under the anabatic cold front. Of course, this is a fun generalization designed to promote investigation into the real world of meteorology. You are correct! Congratulations AB