URNT12 KNHC 101958 VORTEX DATA MESSAGE A. 10/1958Z B. 20 DEG 25 MIN N 59 DEG 45 MIN W C. 700 MB 2877 M D. 65 KT E. 323 DEG 39 NM F. 073 DEG 71 KT G. 331 DEG 19 NM H. EXTRAP 973 MB I. 10 C/ 3033 M J. 16 C/ 3031 M K. 11 C/ NA L. OPEN SSE M. C20 N. 12345/07 O. .1/2 NM P. AF966 0508A FLOYD OB 09 MAX FL WIND 76 KT NE QUAD 1821Z. SLP EXTRAP FROM 700MB. GOOD RADAR PRESENTATION. STADIUM EFFECT N-E QUAD.