ZCZC MIATCPEP5 ALL TTAA00 KNHC DDHHMM BULLETIN TROPICAL STORM ISIS INTERMEDIATE ADVISORY NUMBER 7A COR NATIONAL WEATHER SERVICE MIAMI FL 5 AM PDT THU SEP 03 1998 ...COR...NORTH OF LOS MOCHIS MEXICO ...COR...DIRECTION OF MOTION NORTH NEAR 10 MPH ...TROPICAL STORM ISIS SLOWLY WEAKENING...POSING HEAVY RAINFALL THREAT TO MAINLAND MEXICO... TROPICAL STORM WARNINGS REMAIN IN EFFECT FROM LOS MOCHIS TO GUAYMAS. TROPICAL STORM WARNINGS MAY BE LOWERED LATER TODAY. AT 5 AM PDT...1200Z...THE POORLY DEFINED CENTER OF TROPICAL STORM ISIS WAS LOCATED NEAR LATITUDE 26.9 NORTH...LONGITUDE 109.3 WEST OR ABOUT 80 MILES...130 KM...NORTH OF LOS MOCHIS MEXICO. THE STORM IS MOVING TOWARD THE NORTH NEAR 10 MPH ...16 KM/HR... AND THIS MOTION IS EXPECTED TO CONTINUE THROUGH WEDNESDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 55 MPH...90 KM/HR...WITH HIGHER GUSTS. GRADUAL WEAKENING IS FORECAST DURING THE NEXT 24 HOURS. WINDS OF 40 MPH EXTEND OUTWARD UP TO 60 MILES... 95 KM FROM THE CENTER. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 996 MB...29.41 INCHES. RAINFALL TOTALS OF 5 TO 10 INCHES...WITH LOCALLY HIGHER AMOUNTS ...ARE POSSIBLE ALONG THE PATH OF ISIS...AND COULD CAUSE LIFE- THREATENING FLASH FLOODS AND MUDSLIDES. REPEATING THE 5 AM PDT POSITION...26.9 N...109.3 W. MOVEMENT TOWARD...NORTH NEAR 10 MPH. MAXIMUM SUSTAINED WINDS... 55 MPH. MINIMUM CENTRAL PRESSURE... 996 MB. THE NEXT ADVISORY WILL BE ISSUED BY THE NATIONAL HURRICANE CENTER AT 8 AM PDT. JARVINEN NNNN