[gradsusr] How to combine more variables after with if true then else and draw it on the map?

[Jeff Duda]

What help do you need? The examples you included look correct. Please be
more specific as to what you want to do.

Jeff Duda

On Thu, Dec 24, 2020 at 9:13 PM UwBe International - Severe Weather
Research <info at uwbeinternational.org> wrote:

> Hi Everyone
>
> How do I combine several specific values in one variable and retrieve them
> afterwards, respectively check if condition = 1 or 0 ?
>
> My goal:
> I want to draw areas on the map (circle with line) or with color for the
> following situations:
> 1. if Cape255_0mb is higher or equal than 500J/Kg AND lifted index is
> lower or equal than -2, then draw me yellow in the corresponding places.
>
> 2. if Cape255_0mb is higher than or equal to 500j/kg AND low level shear
> is higher than or equal to 10m/s AND deep layer shear is higher than or
> equal to 10m/s AND srh3km is higher than or equal to 100m2/s2 then draw me
> these areas with orange.
>
> etc.
>
> Unfortunately I don't see through all the combinations. Have already read
> through and tried several tutorials, scripts, etc., but have not achieved
> the desired result. It should all be drawn on a single map.
>
> Can someone help me / us here? :)
>
> As Example, what i want:
> * Thunderstorm 50% probability *
> ********************************
> *CAPE 255-0hPa >= 500J/kg AND best 4 layer lifted index <= -2
> *Color: rgb 216,230,16
> 'define
> prob=const(const(maskout(cape255_0mb,cape255_0mb-500),1.0),0,-u)*const(const(maskout(no4LFTX180_0mb,-2-no4LFTX180_0mb),1.0),0,-u)'
> 'set gxout contour'
> 'set cstyle 1'
> 'set cthick 10'
> 'd prob'
> if (cape255_0mb>= 500&no4lftxsfc<=-2)
> *//TODO: Draw yellow Line for 50% probability of thunderstorms around the
> Area
> *//TODO: Draw 50% Thunderstorm probability
> endif
> ***************************************************************
> * 5% Chance of a severe Thunderstorm, large hail or a Tornado *
> ***************************************************************
> *Conditions
> ***********
> *CAPE 255-0hPa >= 500J/kg AND low level shear >=10m/s AND deep layer shear
> >= 10m/s AND 3km storm relative helicity (SRH) >=100m2/s2
> *OR large hail probability (NCEP/SPC Formula) >= 30%
> *OR surface based supercell composite parameter >= 3.5
> *OR surface based significant tornado parameter >= 1.2
> if((cape255_0mb>= 500&lls>= 10&dls>= 10&srh3km>= 100) | (scp>=3.5) | (stp
> >=1.2))
> *//TODO: Drawing Lines around the Level 1 Area (orange line)
> *//DRAW LEVEL 1
> endif
> ****************************************************************
> * 10% Chance of a severe Thunderstorm, large hail or a Tornado *
> ***************************************************************
> *Conditions
> ***********
> *CAPE 255-0hPa >= 1000J/kg AND low level shear >=15m/s AND deep layer
> shear >= 20m/s AND 3km storm relative helicity (SRH) >=150m2/s2
> if ((cape255_0mb>= 1000&lls>= 15&dls>= 20&srh3km>= 150) | (scp>=7.5) | (
> stp>=2.5))
> *//TODO: Drawing Lines around the Level 2 Area (red line)
> *//DRAW LEVEL 2
> endif
> ****************************************************************
> * 15% Chance of a severe Thunderstorm, large hail or a Tornado *
> ****************************************************************
> *Conditions
> ***********
> *CAPE 255-0hPa >= 2000J/kg AND low level shear >=20m/s AND deep layer
> shear >= 25m/s AND 3km storm relative helicity (SRH) >=200m2/s2
> if ((cape255_0mb>= 2000&lls>= 20&dls>= 25&srh3km>= 200) | (scp>=15) | (stp
> >=5))
> *//TODO: Drawing Lines around the Level 3 Area (purple line)
> *//DRAW LEVEL 3
> endif
>
> Thanks a lot and Merry Christmas!
> --
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> Dominic Kurz
> Präsident / CEO
>
> *UwBe International*
> *Severe Weather Observation*
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> CH-4622 Egerkingen
> Switzerland
>
> Tel.: +41 78 340 46 78
> Direct: +41 76 270 70 87
>
> <https://uwbeinternational.org>
>
> --
> Freundliche Grüsse / Best Regards
> Dominic Kurz
> Präsident / CEO
>
> *UwBe International*
> *Severe Weather Research & Taskforce*
> Einschlagstrasse 30
> CH-4622 Egerkingen
> Switzerland
>
> Tel.: +41 78 340 46 78
> Direct: +41 76 270 70 87
>
> <https://uwbeinternational.org>
>
> E-Mail: info at uwbeinternational.org
> Web: www.uwbeinternational.org <https://uwbeinternational.org>
>
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-- 
Jeff Duda, Research Scientist
University of Colorado Boulder
Cooperative Institute for Research in Environmental Sciences
NOAA/OAR/ESRL/Global Systems Laboratory
Boulder, CO
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