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Title Page
What is a TROWAL?
Why do this training?
Effect of TROWAL
Outline
Outline with item 1 highlighted
Conceptual model of airflow
Adapted figure from Carlson
Browning figure
Namias figure
Basic cyclogenesis
TROWAL model
Outline with item 2 highlighted
Vertical motion
Qn and Qs Frontogenesis
Qs initial
Qs final
Outline with item 3 highlighted
References to the TROWAL
Outline with item 4 highlighted
TROWAL characteristics
Outline with item 5 highlighted
What to look for
Cross section that will show the TROWAL
Pacific System - 700mb temperature
Pacific System - MSLP
Pacific System - Surface temperature
Satellite view considerations
Low Sun Angle Visible satellite image
Water Vapor Loop with TROWAL
Alaska storm
Find a TROWAL: steps 1 and 2
Step 1 schematic
Find a TROWAL: steps 3 and 4
Steps 2 and 3 schematic
Find the TROWAL
Find a TROWAL: steps 5 and 6
Find a TROWAL: step 7
Effect of TROWAL (redux)
Outline with item 6 highlighted
Storm totals
Storm totals over South Dakota
Port of Duluth canal
Stuck car
Eta sfc / 500 mb 18 hour forecast
Eta sfc / 500 mb 30 hour forecast
Eta 850 mb 18 hour forecast
Eta 850 mb 30 hour forecast
500 mb heights
IR loop with metars
IR Loop
Water vapor loop
Water vapor with TROWAL overlay
Thetae at 850 mb
925 mb Frontogenesis
850 mb Frontogenesis
AFD comments
General comments on the storm
Surface evolution of storm
Overhead view of 304 K theta-e surface
Rotated view from the northeast
Rotated view from the northwest
Top view
View from south
View from north
Trajectory view from the top again
Reminder about Qs convergence
Qs divergence and theta
Thetae from 30 December case
Visible loop from 30 December case
Conclusions
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