| Date | Surface | 500mb | |||
| 1955 Apr 12 | 20Z | 15Z11 03Z12 15Z12 03Z13 | |||
| 1961 May 13 | 21Z | ||||
| 1965 Mar 16 | 21Z | ||||
| 1971 Feb 18 | 20Z | ||||
| 1973 Mar 13 | 21Z | ||||
| 1973 May 6 | 21Z | ||||
| 1987 May 3 | 21Z | ||||
| 1988 May 2 | 16Z 21Z | ||||
| 1992 Jan 7 | 21Z | ||||
| 1992 Mar 8 | |||||
| 2000 Mar 23 | 21Z | ||||
| 2000 May 17 | 12Z 16Z 17Z 18Z 20Z | ||||
| 2005 Mar 21 | 19Z | ||||
| 2006 Oct 26 | 20Z | ||||
| 2008 Nov 10 | 19Z 21Z | ||||
| 2009 Apr 18 | 18Z | ||||
| 2019 May 21 |
