Does SN3 flood?

SN3 2AB up to High SN3 2AE up to High SN3 2AF up to High SN3 2AG up to High SN3 2AH up to High SN3 2LL up to High SN3 2LN up to High SN3 2PE up to High SN3 3SG up to High SN3 3SQ up to High SN3 4BJ up to High SN3 4BX up to High SN3 4EJ up to High SN3 4SD up to High SN3 4SE up to High SN3 4SF up to High SN3 4SQ up to High SN3 4SR up to High SN3 4TH up to High SN3 4UP up to High SN3 5AA up to High SN3 5AD up to High SN3 5AG up to High SN3 5AH up to High SN3 6AA up to High SN3 2PF up to Medium SN3 4AH up to Medium SN3 4BL up to Medium SN3 4SP up to Medium SN3 5AJ up to Medium SN3 5AQ up to Medium SN3 5BH up to Medium SN3 5BL up to Medium SN3 5BQ up to Medium SN3 2AJ up to Low SN3 4SL up to Low SN3 4SU up to Low SN3 4SW up to Low SN3 5AE up to Low SN3 5AF up to Low SN3 5AL up to Low SN3 5BJ up to Low SN3 5DA up to Low SN3 5DN up to Low SN3 5DP up to Low SN3 5DR up to Low SN3 5DS up to Low SN3 5DT up to Low SN3 5DU up to Low SN3 5DW up to Low SN3 5DX up to Low SN3 5DZ up to Low SN3 5EA up to Low SN3 5EB up to Low SN3 5EF up to Low SN3 5EG up to Low SN3 5EH up to Low SN3 5EJ up to Low SN3 5EL up to Low SN3 5EP up to Low SN3 5EQ up to Low SN3 5ET up to Low SN3 5EU up to Low SN3 5HP up to Low SN3 5HQ up to Low SN3 5HR up to Low SN3 5HT up to Low SN3 5JG up to Low SN3 5JQ up to Low SN3 5LB up to Low SN3 5LD up to Low SN3 5LJ up to Low SN3 5LL up to Low SN3 5LN up to Low SN3 5LS up to Low SN3 5LW up to Low SN3 6AX up to Low