ZCZC MIATCPEP2 ALL TTAA00 KNHC DDHHMM BULLETIN Tropical Storm Norma Advisory Number 4 NWS National Hurricane Center Miami FL EP172017 300 AM MDT Fri Sep 15 2017 ...NORMA FORECAST TO BECOME A HURRICANE WHILE MOVING SLOWLY TOWARD BAJA CALIFORNIA SUR... SUMMARY OF 300 AM MDT...0900 UTC...INFORMATION ---------------------------------------------- LOCATION...18.6N 109.7W ABOUT 85 MI...140 KM E OF SOCORRO ISLAND ABOUT 295 MI...480 KM S OF CABO SAN LUCAS MEXICO MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H PRESENT MOVEMENT...N OR 350 DEGREES AT 2 MPH...4 KM/H MINIMUM CENTRAL PRESSURE...1000 MB...29.53 INCHES WATCHES AND WARNINGS -------------------- There are no coastal watches or warnings in effect. Interests in Baja California Sur should monitor the progress of Norma. A Hurricane Watch could be required later today for portions of the peninsula. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ At 300 AM MDT (0900 UTC), the center of Tropical Storm Norma was located near latitude 18.6 North, longitude 109.7 West. Norma is moving toward the north near 2 mph (4 km/h), and this slow motion is expected to continue for the next couple of days. Maximum sustained winds are near 50 mph (85 km/h) with higher gusts. Some strengthening is forecast during the next 48 hours and Norma is expected to become a hurricane on Saturday. Tropical-storm-force winds extend outward up to 70 miles (110 km) from the center. The estimated minimum central pressure is 1000 mb (29.53 inches). HAZARDS AFFECTING LAND ---------------------- SURF: Swells generated by Norma will begin affecting portions of the coast of southwestern Mexico and Baja California Sur this weekend. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 900 AM MDT. $$ Forecaster Avila NNNN
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