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CASE S= TUDIES
04 October 2016
15:= 34
|
TYPE |
DATE |
HLN |
WIND |
40 m |
200 m |
SAT PIC |
NOTES - LES |
8-A |
High P |
20140610 |
Light SSE
|
175-195° at= 5-7 knots
|
|
|
Convergence = clouds |
1.5 knots mo= re wind in LES |
11-B |
High P |
20140617 |
Fine N
|
345-000° at= 8-11 knots |
From MODIS worldview |
1 to 3 knots= more wind in LES. Too much: measurements were 5 to 9 knots
LES run work= ed by increasing damping layer to 10 km. Structures are strange.
Use 200 m ru= n
|
||
12-C |
High P |
20150603 |
Light SSE
|
160-185° at= 6-9 knots
Very similar= to 8A
|
From MODIS worldview
Convergence = clouds |
More streaky= gusts in 200 m More gravity= waves in 40 m
2 knots more= wind in LES run |
||
1-D |
High P |
20160530 |
Fine ESE
|
115-130° at= 6-10 knots |
From MODIS worldview
Clear skies<= /p> |
2 knots more= wind in LES
More frequent gravity waves (banding of gusts) |
||
2-E |
LLL |
20160605 |
W winds easi= ng and backing
|
250-270° at= 7-10 knots |
Stationary w= ave |
|
Convergence = clouds - banding - upstream and downstream |
LES run has 'standing wave'
Use 200 m ru= n. |
3-F |
LHL |
20160617 |
Strong SW â€= “ bndry to N
|
220-230° at= 18-25 knots |
From MODIS worldview
Morgan's clo= ud?
Very smooth = wind field |
3 to 4 knots= more wind in LES run |
||
9-G |
LHL |
20160613 |
Strong SW ah= ead cold front
|
215-240° at= 20-28 knots |
= p> |
From MODIS worldview |
3 to 4 knots= more wind in LES run
200 m run wind field arrows are not scaled ri= ght? |
|
4-I |
HLL |
20160626 |
S’ly with convergent shwrs
|
170-200° at= 8-11 knots |
From MODIS worldview |
Only slightl= y more wind in LES run. Similar at edges, slightly more in central Sound
Spatial vari= ation of std dev seems to be better represented |
||
10-H |
HLL |
20160602 |
Sl’y trof = and occ front
|
160-180° at= 13-18 knots |
From MODIS worldview |
1-2 knots mo= re in LES run
More acclera= tion downwind of headlands as well
|
||
5-J |
HHH |
20160623 |
SW then acti= ve trough
|
200-220° at= 10-14 kts, to 6 kts |
From MODIS worldview
Morgan's clo= ud |
Bow waves an= d 2 knots more wind in 40 m run
But does see= m to get the travelling pulses on the western sides which look realistic.
Use 200 m ru= n for most products.
|
||
6-K |
+LH |
20160611 |
Light to cal= m NW
|
300-350° at= 3-9 knots |
From MODIS worldview |
LES runs is = very variable - generating structures to NW of Dockyard. Strange? 3-4 knots mo= re wind too.
But, there h= ave also been bad numerical oscillations in the 200 m run.
Neither model trustworthy? |
||
7-L |
+-H |
20160609 |
Light NNW â€= “ rapid ridge
|
300-330° at= 4-7 knots |
From MODIS worldview
Roll cloud c= ause wind shift |
LES run fail= ed upon retries. Far too much wind.
Use 200 m ru= n. |
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