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Ahead of WCB within the Warm Sector. These conceptual models will be virtually identical to those associated with the three locations north of the warm front with the exceptions that: There will be and cannot be any evidence of the cold conveyor belt - PowerPoint PPT Presentation
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Warm Sector 1Radar Palette Home Click Doppler
Ahead of WCB within the Warm Sector
These conceptual models will be virtually identical to those associated with the three locations north of the warm front with the exceptions that:
• There will be and cannot be any evidence of the cold conveyor belt
• The veering and backing with height signatures will be less pronounced
• The reduced extent of warm sector precipitation will be an issue
• Gulls are found in the warm sector, more so than eagles… Click for the Conceptual Model and Explanation
Warm Sector 2Radar Palette Home Click Doppler
WCB
CCB
Cross-section along Central Branch of the Warm Conveyor Belt (WCB) totally
within the WCB
Content under development
Mixing Zone
SurfaceWarm Front
Increasing CCB Moistening
WCB oriented for
maximum frontal lift
Virga Precipitation
Lower
Hydrometeor
Density
A
B
A B
PrecipitationAt Surface
Warm Sector 3Radar Palette Home Click Doppler
Right of the WCB in the Warm Sector
o
C
Within the WCB:•East of radar veering, warm advection•West of radar nil VWS
Within the PBL:•Probable Ekman spiral near surface resulting in slight veering with range
The Headless Right Wing Stoop CM
The headless gull’s right wing is folded in as if it is about to swoop down.The left wing is still fully extended to catch the lift of the WCB.
Right W
ing
Left
Wing
Signature ofEkman Spiral
Warm Sector 4Radar Palette Home Click Doppler
The Headless Right Wing Stoop CMThis slide is reserved for an actual radar example.
o Right W
ing
Left
Wing
Warm Sector 11Radar Palette Home Click Doppler
Under WCB
• This is totally within the warm sector• Only the WCB is sensed• Cloud and precipitation streets will be sensed
Click for the Conceptual Model and Explanation
Warm Sector 12Radar Palette Home Click Doppler
WCB
CCB
Cross-section along Central Branch of the Warm Conveyor Belt (WCB) totally
within the WCB
Content under development
Mixing Zone
SurfaceWarm Front
Increasing CCB Moistening
WCB oriented for
maximum frontal lift
Virga Precipitation
Lower
Hydrometeor
Density
A
B
A B
PrecipitationAt Surface
Warm Sector 13Radar Palette Home Click Doppler
Within the WCB:•East of radar veering, weak warm advection – veering winds possible•West of radar backing, cold advection – backing winds possible
Under the WCB in the Warm Sector
o
Within the PBL:•Probable Ekman spiral near surface resulting in slight veering with range
The Headless Gull CM
Both wings are fully extended to catch the lift of the WCB. This is a straight line uniform wind field but could be a slightly divergent signature.
Right WingLeft Wing
Note that headless gulls can’t scream…The advections in the warm sector do not warrant this being called an eagle pattern.
Warm Sector 14Radar Palette Home Click Doppler
The Headless Gull CMThe southwesterly WCB is essentially a straight flow but there are hints of the upper level divergence depicted in the conceptual model. o Right WingLeft W
ing
Warm Sector 15Radar Palette Home Click Doppler
A
B
C
D
E
F
G
The Headless Gull CMThe southwesterly WCB is essentially a straight flow but there are hints of the upper level divergence depicted in the conceptual model.
o Right WingLeft Wing
•A and B and the black lines joining the inflexion points represent the top of the veering partly due to the Eckman spiral and perhaps some residual warm air advection. Note the A line is “sharper “ looking than B.•C to D represents a low level jet max. •Notice that outward from A and B and the inflexions the lines of constant radial velocity are nearly parallel( except for some slight backing from B to G) to the radials indicating constant wind direction. •We see a higher level jet max from E to F.
Warm Sector 21Radar Palette Home Click Doppler
Behind WCB in the Warm Sector
Click for the Conceptual Model and Explanation
Warm Sector 22Radar Palette Home Click Doppler
WCB
Cross-section along Central Branch of the Warm Conveyor Belt (WCB) totally
within the WCB
Content under development
SurfaceWarm Front
A
B
A B
CCB
Mixing ZoneIncreasing CCB
Moistening
Virga Precipitation
Lower
Hydrometeor
Density
B
PrecipitationAt Surface
Warm Sector 23Radar Palette Home Click Doppler
Left of the WCB in the Warm Sector
Within the WCB:•West of radar backing, cold advection•East of radar nil VWS
Within the PBL:•Probable Ekman spiral near surface resulting in slight veering with range o
The Headless Left Wing Stoop CM
The headless gull’s left wing is folded in as if it is about to swoop down.The right wing is still fully extended to catch the lift of the WCB.
Right Wing
Left
Win
g
C
Warm Sector 24Radar Palette Home Click Doppler
The Headless Left Wing Stoop CMThis slide is reserved for an actual radar example. o
Right Wing
Left
Win
g
Warm Sector 31Radar Palette Home Click Doppler
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.