In order from lowest to highest, the possible Arcane rolls and the levels they’re equivalent to are:
Roll Min Level Max Level Taw — — Beth 0 0 Gimel 0 2 Daleth 1 6 He 4 10 Waw 7 14 Zayin 11 17 Heth 14 21 Teth 19 25 Yod 22 29 Kaph 25 35 Lamed 33 42 Mem 38 50 Nun 46 59 Samekh 55 68 Ayin 64 81 Pe 77 94 Sadhe 90 98 Qoph 95 100 Resh 98 100 Shin 100 100 Aleph — — These levels are organised in such a way that if you’re the min level for a Roll, it will be hard for you to roll that, and if you’re the max level, it will be easy. If you’re below the min level, you will have a very hard time indeed rolling that, and if you’re above the max level, that should be par for the course.
Rolling a Taw is always a critical failure, and rolling an Aleph is always a resounding success.
A more in depth explanation
Normal Roll
Critical Failure: Taw
“Good news, it should be clear skies for
the rest of the week”
Partial Success: Beth to He. “It should rain this week”
Minor Success: Waw - Teth. “Maybe you should pack an umbrella after Thursday?”
Success: Yod - Nun. “I see water and clouds covering London”
Major Success: Samekh - Sadhe. “I see people with umbrellas on friday and hazy fog along with that”
Incredible Success: Qoph-Resh. “Rain on friday in London. Drizzles and fog the rest of the weekend
Complete Success: Shin. “Rain on friday from lunch to evening in London. Gloomy and wet until Tuesday
Resounding Success: Aleph - As Shin