Hi and welcome to the forum. The SRG is a great cooker (as you know) but wind and some bad weather can cause issues.
Saber4 posted skirt I did a few years back and it does work well. BUT another few things will help you out in
cold weather cooking
1. If possibe try to keep your SRG or TBE in doors like a garage or tool shed. The regulator does not like being real cold and the burner feels the same way. If at all possible try to keep them above 40 to 45 degrees. they will work much better
2. Add the skirt or block all wind if possible, this will help alot and cost very little to nothing if you have some house flashing.
3. IMHO, try to keep the tank indoors as well, cold fuel running through a cold regulator & burner = ice and that's a bad thing
If you can't keep it indoors try this... Fire up the SRG and let it run 10 mins or so then turn it off & cover it with a welding blanket (Harbor freight has them cheap) this will pre-warm the SRG prior to cooking and it does work
This issue was brought up a few years back on the CharBroil forum and was tossed around for a few months with all kind of ideas.
The ones here IMHO work best, but I do not know where you live nor conditions it's being used.
So hope this helps