000 WTPZ31 KNHC 040531 TCPEP1 BULLETIN HURRICANE VANCE INTERMEDIATE ADVISORY NUMBER 20A NWS NATIONAL HURRICANE CENTER MIAMI FL EP212014 1000 PM PST MON NOV 03 2014 ...VANCE PASSING JUST TO THE SOUTHEAST OF SOCORRO ISLAND... SUMMARY OF 1000 PM PST...0600 UTC...INFORMATION ----------------------------------------------- LOCATION...18.0N 110.4W ABOUT 65 MI...110 KM SE OF SOCORRO ISLAND ABOUT 440 MI...710 KM SW OF MAZATLAN MEXICO MAXIMUM SUSTAINED WINDS...110 MPH...175 KM/H PRESENT MOVEMENT...NNE OR 20 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...965 MB...28.50 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WATCH IS IN EFFECT FOR... * MAZATLAN NORTHWARD TO TOPOLOBAMPO MEXICO A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. INTERESTS ELSEWHERE ALONG THE SOUTHWESTERN COAST OF MEXICO SHOULD MONITOR THE PROGRESS OF VANCE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 1000 PM PST...0600 UTC...THE CENTER OF HURRICANE VANCE WAS LOCATED NEAR LATITUDE 18.0 NORTH...LONGITUDE 110.4 WEST. VANCE IS MOVING TOWARD THE NORTH-NORTHEAST NEAR 13 MPH...20 KM/H...AND THIS GENERAL MOTION IS EXPECTED TO CONTINUE FOR THE NEXT COUPLE OF DAYS. ON THE FORECAST TRACK...VANCE IS EXPECTED TO PASS JUST EAST OF SOCORRO ISLAND IN THE NEXT FEW HOURS...AND BE NEAR THE SOUTHWESTERN COAST OF MEXICO IN THE TROPICAL STORM WATCH AREA BY LATE WEDNESDAY. MAXIMUM SUSTAINED WINDS REMAIN NEAR 110 MPH...175 KM/H...WITH HIGHER GUSTS. WEAKENING IS FORECAST TO BEGIN BY TUESDAY MORNING...AND STEADY TO RAPID WEAKENING IS EXPECTED THEREAFTER. HURRICANE-FORCE WINDS EXTEND OUTWARD UP TO 15 MILES...30 KM...FROM THE CENTER...AND TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 125 MILES...205 KM. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 965 MB...28.50 INCHES. HAZARDS AFFECTING LAND ---------------------- RAINFALL...VANCE AND MOISTURE SPREADING NORTHWARD AHEAD OF THE SYSTEM IS EXPECTED TO PRODUCE RAINFALL TOTALS OF 4 TO 8 INCHES WITH ISOLATED AMOUNTS NEAR 12 INCHES THROUGH WEDNESDAY OVER THE STATES OF SINALOA...NAYARIT....AND DURANGO IN WESTERN MEXICO. THESE RAINS ARE LIKELY TO PRODUCE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES... ESPECIALLY IN AREAS OF MOUNTAINOUS TERRAIN. SURF...SWELLS GENERATED BY VANCE ARE EXPECTED TO BEGIN AFFECTING PORTIONS OF THE COAST OF SOUTHWESTERN MEXICO AND BAJA CALIFORNIA SUR TONIGHT AND 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 COMPLETE ADVISORY...100 AM PST. $$ FORECASTER PASCH