ZCZC MIATCPEP5 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM MADELINE INTERMEDIATE ADVISORY NUMBER 6A NATIONAL WEATHER SERVICE MIAMI FL 11 AM PDT SAT OCT 17 1998 A HURRICANE WARNING IS IN EFFECT FOR THE MAINLAND OF MEXICO FROM MELAQUE TO MAZATLAN...AND THE ISLAS MARIAS. A HURRICANE WATCH REMAINS IN EFFECT FROM NORTH OF MAZATLAN TO LOS MOCHIS...AND ALONG THE SOUTHERN BAJA CALIFORNIA PENINSULA FROM LA PAZ SOUTHWARD. AT 11 AM PDT...1800Z...THE CENTER OF TROPICAL STORM MADELINE WAS LOCATED NEAR LATITUDE 20.0 NORTH...LONGITUDE 107.0 WEST OR ABOUT 90 MILES...150 KM...WEST-SOUTHWEST OF CABO CORRIENTES MEXICO. THIS POSITION IS ALSO ABOUT 105 MILES...165 KM...SOUTH-SOUTHWEST OF THE ISLAS MARIAS. MADELINE HAS DRIFTED TOWARD THE NORTHEAST OVER THE PAST FEW HOURS AND A SLOW NORTHEASTWARD OR NORTHWARD MOTION IS EXPECTED TO CONTINUE THROUGH TONIGHT. ON THIS TRACK...THE CENTER OF MADELINE WILL MOVE OVER OR NEAR THE ISLAS MARIAS OR ADJACENT MAINLAND DURING THE NEXT 24 HOURS. MAXIMUM SUSTAINED WINDS ARE NEAR 70 MPH...110 KM/HR...WITH HIGHER GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 24 HOURS AND MADELINE IS EXPECTED TO BECOME A HURRICANE LATER TODAY. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 85 MILES...140 KM FROM THE CENTER. ESTIMATED MINIMUM CENTRAL PRESSURE IS 990 MB...29.23 INCHES. RAINFALL TOTALS OF 5 TO 10 INCHES ARE POSSIBLE IN ASSOCIATION WITH MADELINE. STORM TIDES OF 2 TO 4 FEET ABOVE NORMAL ASTRONOMICAL TIDES... ACCOMPANIED BY LARGE AND DANGEROUS BATTERING WAVES...COULD OCCUR IN THE WARNED AREA. REPEATING THE 11 AM PDT POSITION...20.0 N...107.0 W. MOVEMENT... NORTHEASTWARD DRIFT. MAXIMUM SUSTAINED WINDS... 70 MPH. MINIMUM CENTRAL PRESSURE... 990 MB. THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 2 PM PDT. RAPPAPORT NNNN