EUMeTrain: Nowcasting CAL Module - RGB Nowcasting

Convection

"Let me first recapitulate the topics and questions we tried to answer in our first basic Nowcasting with the IR image only. The questions were:

Will the cell pass over Dijon and during which time period?
During the next time period the cell increases and merges with another cell. At which point of time can you be sure about this process for the first time?
If you follow the movement of the cell across the city Dijon till 09.30 can you see some substructure in the cell?
Is there a change goinig on especially a merging of the cells and if yes, when does it happen?
Does the convective cell move over the city Zürich and if yes, how long does it last?
At 12.00 Bregenz is located in relation to the cloud cell ...
Does the city Salzburg get under the influence of the northwestern cell (centered in Bavaria) or the southeastern cell (centered in North Italy and Southern Tyrol)?
Is Salzburg crossed by the part with the coldes cloud tops during this time period?

There are three groups of questions:
1.) Will convective cells pass over a city, when and how long will it last?
2.) Will a merging of cells appear?
3.) Are there substructures within the cell and do they move over a special place/city?

Can you answer all or at least some questions now better with the air mass RGB? "

"Well, the convection RGB gives more information about the structure and the quality of the cloudiness. Consequently all the questions "will a certain town be crossed by a convective cell" can be answered better cannot be answered any better cannot be answered any better ."

"Very well! But does this mean that RGBs are not useful for convection?"

"No. For all questions concerning substructures there must be more information or at least more certainty from the RGB images."

 Basic Info  Dijon  Bern  Zürich  Bregenz  Salzburg
 
 

"So what is the gain of knowledge with using this special RGB over using only false coloured images?"

"In the false coloured images I can identify cold cloud tops but they could also be connected to high cirrus alone. In the RGB the colours give me hints about the vertical distribution of the cell, about the existence of deep convective cells embedded and henc the weathert acivity of a convective system.
So what I can say is that the best combination of methods would be the RGB methods an some quantitative estamation of displacement into the future. "

"Yes, the quantitative displacement will be a topic for the next exercise. But before this, try to again complete the table."

  Answer Possible No answer possible, but some hints No answer possible
Formation of Convective Cells
Life Cycle of Convective Cells
Arrival Time of Convective Cells
Low/High/Multilevel cloud
Arrival Time of Rain Area
Existence of Thunderstorms
Arrival Time of Thunderstorms