387 WTPZ35 KNHC 302033 TCPEP5 BULLETIN Hurricane Rosa Advisory Number 23 NWS National Hurricane Center Miami FL EP202018 200 PM PDT Sun Sep 30 2018 ...ROSA EXPECTED TO CAUSE FLOODING RAINS OVER PORTIONS OF NORTHWESTERN MEXICO AND THE SOUTHWESTERN UNITED STATES... SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...25.2N 118.1W ABOUT 260 MI...415 KM SW OF PUNTA EUGENIA MEXICO ABOUT 450 MI...720 KM SSW OF SAN FELIPE MEXICO MAXIMUM SUSTAINED WINDS...75 MPH...120 KM/H PRESENT MOVEMENT...NNE OR 25 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...982 MB...29.00 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * West coast of the Baja California peninsula from Punta Abreojos to Cabo San Quintin A Tropical Storm Watch is in effect for... * East coast of the Baja California peninsula from Bahia de los Angeles to San Felipe Interests elsewhere in the northern and central Baja California peninsula and northwestern Sonora should monitor the progress of Rosa. For storm information specific to your area, please monitor products issued by your national meteorological service. DISCUSSION AND OUTLOOK ---------------------- At 200 PM PDT (2100 UTC), the center of Hurricane Rosa was located near latitude 25.2 North, longitude 118.1 West. Rosa is moving toward the north-northeast near 12 mph (19 km/h). This general motion is expected to continue through Tuesday. On the forecast track, the center of Rosa will approach the central and northern Baja California peninsula on Monday. Rosa's remnants will then move across the Desert Southwest on Tuesday. Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Weakening is forecast during the next couple of days, and Rosa is expected to become a tropical storm by this evening. Hurricane-force winds extend outward up to 30 miles (45 km) from the center, and tropical-storm-force winds extend outward up to 160 miles (260 km). The minimum central pressure reported by an Air Force Hurricane Hunter aircraft is 982 mb (29.00 inches). HAZARDS AFFECTING LAND ---------------------- RAINFALL: From late Sunday through Wednesday Rosa is expected to produce the following total rainfall accumulations: Baja California and northwestern Sonora: 3 to 6 inches, isolated 10 inches. Central and Southern Arizona: 2 to 4 inches. Isolated 6 inch totals are possible in the mountains of Central Arizona. Rest of the Desert Southwest, Central Rockies, and Great Basin: 1 to 2 inches, isolated 4 inches. These rainfall amounts may produce life-threatening flash flooding. Dangerous debris flows and landslides are also possible in mountainous terrain. WIND: Tropical storm conditions are expected to first reach the coast within the warning area by Monday morning. Tropical storm conditions are possible within the watch area by late Monday. SURF: Swells generated by Rosa will affect portions of the coasts of southwestern Mexico, most of the west coast of the Baja California peninsula, and southern California through Tuesday. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 500 PM PDT. Next complete advisory at 800 PM PDT. $$ Forecaster Pasch