Radar Palette Home Click Conventional Pre-warm Frontal 1 Ahead of WCB Classic area for virga Probability of virga increases with strength and dryness of the CCB and the strength and moisture of leading branch of the WCB Katabatic portion of warm front Click for the Conceptual Model and Explanation

Radar Palette Home Click Conventional Pre-warm Frontal 2 WCB CCB Warm Frontal Cross-section along Leading Branch of the Warm Conveyor Belt (WCB) Cold air in Cold Conveyor Belt (CCB) deep and dry Moist portion of Warm Conveyor Belt (WCB) is high and veered from frontal perpendicular – katabatic tendency Dry lower levels of WCB originate from ahead of the system and backed from frontal perpendicular Mixing Zone Surface Warm Front Frontal slope is more shallow than the typical 1:200 Precipitation extends equidistant into the unmodified CCB Precipitation extends further into the moistened, modified CCB Increasing CCB Moistening WCB oriented for maximum frontal lift WCB oriented for less frontal lift Virga Precipitation Lower Hydrometeor Density Common location for virga A B A B WCB typically veers with height (it is after all, a warm front) Link to Classic Example

Radar Palette Home Click Conventional Pre-warm Frontal 3 Vertical Deformation Zone Distribution and the CBM Summary C C C C C WCB DCB CCB DCB C

Radar Palette Home Click Conventional Pre-warm Frontal 4 Inactive or Katabatic Warm Front

Radar Palette Home Click Conventional Pre-warm Frontal 5 Ahead of WCB Ex 3 C

Radar Palette Home Click Conventional Pre-warm Frontal 6

Radar Palette Home Click Conventional Pre-warm Frontal 7

Radar Palette Home Click Conventional Pre-warm Frontal 8

Radar Palette Home Click Conventional Pre-warm Frontal 9

Radar Palette Home Click Conventional Pre-warm Frontal 10

Radar Palette Home Click Conventional Pre-warm Frontal 11 Under WCB Virga only likely on the leading edge of the WCB The CCB is becoming increasingly moist Frontal overrunning and isentropic lift is increasing thus increasing the intensity of the precipitation process. Warm front becoming more likely Anabatic Click for the Conceptual Model and Explanation

Radar Palette Home Click Conventional Pre-warm Frontal 12 WCB CCB Warm Frontal Cross-section along Central Branch of the Warm Conveyor Belt (WCB) Cold air in Cold Conveyor Belt (CCB) more shallow and moist Moist portion of Warm Conveyor Belt (WCB) is thicker, higher and perpendicular to front Lower levels of WCB have the same origin as the upper level of the WCB - frontal perpendicular Mixing Zone Surface Warm Front Frontal slope is near the typical 1:200 Precipitation extends further into the moistened, modified CCB. Horizontal rain area begins to expand as CCB moistens. Increasing CCB Moistening WCB oriented for maximum frontal lift Virga Precipitation Lower Hydrometeor Density Common location for virga A B A B WCB shows little directional shift with height. A greater WCB depth is frontal perpendicular Precipitation At Surface

Radar Palette Home Click Conventional Pre-warm Frontal 13 Vertical Deformation Zone Distribution and the CBM Summary C C C C C WCB DCB CCB DCB C

Radar Palette Home Click Conventional Pre-warm Frontal 14 Active or Anabatic Warm Front

Radar Palette Home Click Conventional Pre-warm Frontal 15

Radar Palette Home Click Conventional Pre-warm Frontal 16

Radar Palette Home Click Conventional Pre-warm Frontal 17

Radar Palette Home Click Conventional Pre-warm Frontal 18

Radar Palette Home Click Conventional Pre-warm Frontal 19

Radar Palette Home Click Conventional Pre-warm Frontal 20

Radar Palette Home Click Conventional Pre-warm Frontal 21 Behind WCB Virga much less likely The CCB has become moist Frontal overrunning and isentropic lift is maximized thus maximizing the intensity of the precipitation process. Warm front is likely Anabatic Click for the Conceptual Model and Explanation

Radar Palette Home Click Conventional Pre-warm Frontal 22 WCB CCB Warm Frontal Cross-section along Trailing Branch of the Warm Conveyor Belt (WCB) Cold air in Cold Conveyor Belt (CCB) even more shallow and more moist Moist portion of Warm Conveyor Belt (WCB) is thicker, higher and backed from frontal perpendicular – anabatic tendency Lower levels of WCB have the same origin as the upper level of the WCB Mixing Zone Surface Warm Front Frontal slope likely steeper than the typical 1:200 Precipitation extends further into the moistened, modified CCB. Horizontal rain area expands rapidly as CCB moistened. Increasing CCB Moistening WCB oriented for maximum frontal lift Virga Precipitation Lower Hydrometeor Density Common location for virga A B A B WCB probably backs slightly with height in spite of the warm air advection. A greater WCB depth is frontal perpendicular Precipitation At Surface

Radar Palette Home Click Conventional Pre-warm Frontal 23 Vertical Deformation Zone Distribution and the CBM Summary C C C C C WCB DCB CCB DCB C

Radar Palette Home Click Conventional Pre-warm Frontal 24 Active or Anabatic Warm Front

Radar Palette Home Click Conventional Pre-warm Frontal 25 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 26 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 27 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 28 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 29 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 30 Behind WCB

Radar Palette Home Click Conventional Pre-warm Frontal 31 This must be and remain as Slide 31. The links to the three sections of the airflows that comprise each of the conveyor belts are located at Slide 1,11 and 21. Slide 11 is always the central, col limited circulation. This leaves 10 PowerPoint slides for the development of the training material which should be more than adequate.