Search found 70 matches

by norulz
Sun Nov 19, 2017 11:22 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

I didn't follow the storm in Greece closely last week. I have, however, been able in the past to forecast a Mesoscale Convective Vortex (MCV) that occurred on 25 Oct 2015 hitting Alexandria, Egypt and 6 hours later Beirut, Lebanon. It also spawning supercells that caused extensive damage in Israel. ...
by norulz
Sun Nov 19, 2017 2:14 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

Hi alfe, You are correct. There is no possible selection of trigger options for MSKF which is a pity at it appears to not trigger when it should. Rainy season is starting here in the East Med and I'm closely monitoring forecast performance with the regular KF module using trigger option 3. Interesti...
by norulz
Thu Nov 02, 2017 11:21 am
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

I spent some more time on this issue after poor rain forecasts and managed to obtain some improvement with the following configuration of a 12km/4km domain set. I set cu_physics = 1,1 to force the cumulus module on the high resolution sub domain in spite of the uems warning. The 4km sub domain is no...
by norulz
Fri Oct 27, 2017 7:59 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

Hi, I have spent some time trying some options to see the effect on the triggering of convection in the model and to the extent of convection shown. I run a 12km outer domain with one 4 km nest and did the comparisons on a specific date (25 October 2015) when there was a very active Red Sea Trough w...
by norulz
Fri Sep 15, 2017 12:24 pm
Forum: UEMS v15.x support
Topic: MAP SAVE ERROR
Replies: 7
Views: 220

Re: MAP SAVE ERROR

It sounds like a linux privileges issue. You might try a clean installation (after deleted the previous one). Ensure that you are logged in as administrator while installing and when asked for the user to give ownership to enter cliffe.
by norulz
Mon Jul 31, 2017 7:34 am
Forum: UEMS v15.x support
Topic: nomad tiles larger than ptiles from ems system ?
Replies: 2
Views: 172

Re: nomad tiles larger than ptiles from ems system ?

I concur that the nomads tiles are double the size of the uems ptiles. I am using smaller domains so I don't really mind the slightly longer download time. I noticed your request for the Nomads data and the var LANDN is missing. You will need this to get correct masking after the GFS upgrade. Otherw...
by norulz
Tue Jul 25, 2017 3:06 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

I'm not as intimate as you are with the internals of the schemes and the interactions between them but I will be playing around with them and will let you know if I think anything might be interesting.
by norulz
Tue Jul 25, 2017 1:01 pm
Forum: General NWP, Postprocessing, Meteorology
Topic: How to improve convection triggering?
Replies: 12
Views: 325

Re: How to improve convection triggering?

Unfortunately no ideas... I share your feeling for the problem. Last night I, once more, read many of the existing studies into use of the various convection schemes for WRF but found no clear guidance on how to improve convection triggering. In the East Med the problem with convection triggering is...
by norulz
Mon Jul 24, 2017 7:33 am
Forum: UEMS v15.x support
Topic: Changes needed for GFS Update 2017?
Replies: 75
Views: 2971

Re: Changes needed for GFS Update 2017?

I am experiencing the same, but I am currently still on 15.99.2. My runs fail, and I do not get any diagnostic messages. Is this problem solved in 15.99.5? All my domain runs failed on the first try but started up OK on the second and subsequent runs without changing anything. I suggest to try again.
by norulz
Sat Jul 22, 2017 8:28 am
Forum: UEMS v15.x support
Topic: Changes needed for GFS Update 2017?
Replies: 75
Views: 2971

Re: Changes needed for GFS Update 2017?

There is a new update on uems server: 15.99.5 http://ems3.comet.ucar.edu/uems/releases/ Has anyone tested it? I have tried it and it finally appears to be working OK. I performed both updates (15.99.2 & 15.99.5) at the same time using the install utility dated 18 July 2017. There were problems with...