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Cloud Base script
http://www.weathergraphics.com/forum/viewtopic.php?f=9&t=1514
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Author:  Peter [ Wed May 20, 2009 12:51 pm ]
Post subject:  Cloud Base script

I put this in the wrong section so here it is in the Scripting section where it belongs - sorry.

Sometime ago a request was made for a script for plotting cloud base using the following formula:

Cloud Base ft = ((Temp - Dew point) / 4.4) * 1000

The script is as below:

#Cloud Base script FEET
#CB feet= ((Surface Temp F - Dewpoint F)/4.4) * 1000
ERASE
SFCPLOTMODEL,C:\Documents and Settings\.????..\.????\.??.\.???.\Standard Plot model.sps
ANALYZE, SMLC 4:1000 STOR 4 SDVC 3:4.4 STOR=3 SDIF 1:2 STOR=2 DWPT DEGF STOR=1 TEMP DEGF
ANALYZE, CONT CINT=200 COLOR=100:100:100

Fill in the appropriate ???? with your .SPS file usually in the DA directory.

The formula is only approximate and theoretical so not sure how much use it really is in the 'real' world.

To convert to metres use script below:

#Cloud Base script Metres
#CB metres= (((Surface Temp F - Dewpoint F)/4.4) * 1000)/3.28
ERASE
SFCPLOTMODEL,C:\Documents and Settings\?????\?????\????\DigitalAtmosphere\Standard Plot model.sps
ANALYZE, SDVC 5:3.28 STOR=5 SMLC 4:1000 STOR 4 SDVC 3:4.4 STOR=3 SDIF 1:2 STOR=2 DWPT DEGF STOR=1 TEMP DEGF
ANALYZE, CONT CINT=50 COLOR=100:100:100

Change CINT as required.

Regards

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