000 WTNT31 KNHC 282031 TCPAT1 BULLETIN TROPICAL STORM ALEX ADVISORY NUMBER 13 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL012010 400 PM CDT MON JUN 28 2010 ...ALEX MOVING NORTH-NORTHWEST...TROPICAL STORM WATCH ISSUED FOR PORTIONS OF THE TEXAS COAST... SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION ---------------------------------------------- LOCATION...20.5N 91.8W ABOUT 410 MI...660 KM ESE OF TAMPICO MEXICO ABOUT 520 MI...835 KM SE OF BROWNSVILLE TEXAS MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/HR PRESENT MOVEMENT...NNW OR 330 DEGREES AT 5 MPH...7 KM/HR MINIMUM CENTRAL PRESSURE...990 MB...29.23 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY... A TROPICAL STORM WATCH HAS BEEN ISSUED FOR THE COAST OF TEXAS FROM BAFFIN BAY TO PORT OCONNOR. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A HURRICANE WATCH IS IN EFFECT FOR... * THE COAST OF TEXAS SOUTH OF BAFFIN BAY TO THE MOUTH OF THE RIO GRANDE * THE COAST OF MEXICO FROM THE MOUTH OF THE RIO GRANDE TO LA CRUZ A TROPICAL STORM WATCH IN IN EFFECT FOR... * THE COAST OF TEXAS FROM BAFFIN BAY TO PORT OCONNOR A HURRICANE WARNING COULD BE REQUIRED FOR A PORTION OF THE HURRICANE WATCH AREA TONIGHT. A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. FOR STORM INFORMATION SPECIFIC TO YOUR AREA IN THE UNITED STATES...INCLUDING POSSIBLE INLAND WATCHES AND WARNINGS...PLEASE MONITOR PRODUCTS ISSUED BY YOUR LOCAL NATIONAL WEATHER SERVICE FORECAST OFFICE. FOR STORM INFORMATION SPECIFIC TO YOUR AREA OUTSIDE UNITED STATES...PLEASE MONITOR PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE. DISCUSSION AND 48-HOUR OUTLOOK ------------------------------ AT 400 PM CDT...2100 UTC...THE CENTER OF TROPICAL STORM ALEX WAS LOCATED NEAR LATITUDE 20.5 NORTH...LONGITUDE 91.8 WEST. ALEX IS MOVING TOWARD THE NORTH-NORTHWEST NEAR 5 MPH...7 KM/HR. AN INCREASE IN FORWARD SPEED AND A TURN TOWARD THE NORTHWEST ARE EXPECTED ON TUESDAY...FOLLOWED BY A TURN TOWARD THE WEST-NORTHWEST ON WEDNESDAY. ON THE FORECAST TRACK...ALEX WILL MOVE ACROSS THE SOUTHERN GULF OF MEXICO AND APPROACH THE COAST WITHIN THE HURRICANE WATCH AREA LATE WEDNESDAY. MAXIMUM SUSTAINED WINDS ARE NEAR 60 MPH...95 KM/HR...WITH HIGHER GUSTS. SOME STRENGTHENING IS FORECAST DURING THE NEXT 48 HOURS... AND ALEX IS EXPECTED TO BECOME A HURRICANE ON TUESDAY. TROPICAL STORM FORCE WINDS EXTEND OUTWARD UP TO 70 MILES...110 KM FROM THE CENTER. AN AUTOMATED STATION FROM THE MEXICAN NAVY AT CAYO ARCAS RECENTLY REPORTED A SUSTAINED WIND OF 33 MPH...53 KM/HR...AND A GUST OF 40 MPH...65 KM/HR. THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 990 MB...29.23 INCHES. THE MEXICAN NAVY STATION AT CAYO ARCAS RECENTLY REPORTED A PRESSURE OF 992 MB...29.29 INCHES. HAZARDS AFFECTING LAND ---------------------- RAINFALL...ALEX IS EXPECTED TO PRODUCE ADDITIONAL RAINFALL ACCUMULATIONS OF 3 TO 6 INCHES OVER SOUTHERN MEXICO AND THE YUCATAN PENINSULA THROUGH TUESDAY. ISOLATED MAXIMUM AMOUNTS OF 10 INCHES ARE POSSIBLE OVER MOUNTAINOUS AREAS. THESE RAINS COULD CAUSE LIFE-THREATENING FLASH FLOODS AND MUD SLIDES. HEAVY RAINS COULD REACH THE COASTAL AREAS OF TAMAULIPAS AND NORTHERN VERACRUZ OF MEXICO AND SOUTH TEXAS TUESDAY NIGHT AND WEDNESDAY. WIND...TROPICAL STORM CONDITIONS ARE EXPECTED TO APPROACH THE COAST WITHIN THE HURRICANE AND TROPICAL STORM WATCH AREAS ON WEDNESDAY... MAKING OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. NEXT ADVISORY ------------- NEXT INTERMEDIATE ADVISORY...700 PM CDT. NEXT COMPLETE ADVISORY...1000 PM CDT. $$ FORECASTER BRENNAN