Fig. 3. Strong TUTT case - (a) AVN analysis of 200 mb winds on 00 UTC 1 September 1993. (b) AVN 48 h forecast of the 200 mb winds which verifies on 00 UTC 3 September 1993. (c) AVN analysis of 200 mb winds on 00 UTC 3 September 1993. Windspeeds are contoured every 8 ms^-1 with shading added for those winds greater than 16 ms^-1.