773
WTPZ35 KNHC 130537
TCPEP5
BULLETIN
HURRICANE SIMON INTERMEDIATE ADVISORY NUMBER 23A
NWS NATIONAL HURRICANE CENTER MIAMI FL EP202026
1100 PM MST MON OCT 12 2026
..SIMON MOVING SLOWLY NORTHWESTWARD
...FLOODING RAINS TO CONTINUE ALONG THE COAST OF WEST-CENTRAL
MEXICO...
SUMMARY OF 1100 PM MST...0600 UTC...INFORMATION
-----------------------------------------------
LOCATION...20.5N 107.1W
ABOUT 90 MI...145 KM W OF CABO CORRIENTES MEXICO
ABOUT 190 MI...310 KM SSW OF MAZATLAN MEXICO
MAXIMUM SUSTAINED WINDS...90 MPH...150 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 3 MPH...6 KM/H
MINIMUM CENTRAL PRESSURE...977 MB...28.85 INCHES
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:
NONE.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A HURRICANE WARNING IS IN EFFECT FOR...
* LAS ISLAS MARIAS
A HURRICANE WATCH IS IN EFFECT FOR...
* NORTH OF ESCUINAPA TO BAHIA TEMPEHUAYA
A TROPICAL STORM WATCH IS IN EFFECT FOR...
* CABO CORRIENTES TO ESCUINAPA
A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED
SOMEWHERE WITHIN THE WARNING AREA. PREPARATIONS TO PROTECT LIFE
AND PROPERTY SHOULD BE RUSHED TO COMPLETION.
A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
WITHIN THE WATCH AREA WITHIN 48 HOURS.
A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA, GENERALLY WITHIN 48 HOURS.
INTERESTS ELSEWHERE IN WEST-CENTRAL MEXICO SHOULD CONTINUE TO
MONITOR AS CHANGES TO WATCHES AND WARNINGS ARE POSSIBLE ON TUESDAY.
FOR STORM INFORMATION SPECIFIC TO YOUR AREA, PLEASE MONITOR
PRODUCTS ISSUED BY YOUR NATIONAL METEOROLOGICAL SERVICE.
DISCUSSION AND OUTLOOK
----------------------
AT 1100 PM MST (0600 UTC), THE CENTER OF HURRICANE SIMON WAS LOCATED
NEAR LATITUDE 20.5 NORTH, LONGITUDE 107.1 WEST. SIMON IS MOVING
TOWARD THE NORTHWEST NEAR 3 MPH (6 KM/H). SIMON IS EXPECTED TO
CONTINUE MOVING SLOWLY NORTHWESTWARD DURING THE NEXT DAY OR SO,
FOLLOWED BY A TURN TOWARD THE NORTH ON WEDNESDAY.
MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 90 MPH (150 KM/H)
WITH HIGHER GUSTS. SOME ADDITIONAL WEAKENING IS FORECAST OVER THE
NEXT DAY OR SO, BUT SIMON IS FORECAST TO REMAIN A HURRICANE THROUGH
MIDWEEK AND COULD RE-INTENSIFY BY WEDNESDAY.
SIMON IS A SMALL TROPICAL CYCLONE. HURRICANE-FORCE WINDS EXTEND
OUTWARD UP TO 10 MILES (20 KM) FROM THE CENTER, AND
TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 45 MILES (75 KM).
THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 977 MB (28.85 INCHES).
HAZARDS AFFECTING LAND
----------------------
KEY MESSAGES FOR SIMON CAN BE FOUND IN THE TROPICAL CYCLONE
DISCUSSION UNDER AWIPS HEADER MIATCDEP5 AND WMO HEADER WTPZ45 KNHC.
WIND: HURRICANE CONDITIONS, ESPECIALLY IN GUSTS, ARE LIKELY TO OCCUR
IN LAS ISLAS MARIAS BEGINNING ON TUESDAY. HURRICANE CONDITIONS ARE
POSSIBLE WITHIN THE HURRICANE WATCH AREA ON WEDNESDAY, WITH TROPICAL
STORM CONDITIONS POSSIBLE BY TUESDAY NIGHT. TROPICAL STORM
CONDITIONS ARE POSSIBLE WITHIN THE TROPICAL STORM WATCH AREA ON
TUESDAY AND WEDNESDAY.
RAINFALL: SIMON IS EXPECTED TO PRODUCE RAINFALL TOTALS OF 5 TO 10
INCHES ACROSS COASTAL WEST-CENTRAL MEXICO WITH ISOLATED MAXIMUM
AMOUNTS OF 15 INCHES OVER THE STATE OF SINALOA BY THURSDAY.
FOR A COMPLETE DEPICTION OF FORECAST RAINFALL ASSOCIATED WITH SIMON,
PLEASE SEE THE NATIONAL WEATHER SERVICE STORM TOTAL RAINFALL GRAPHIC
AVAILABLE AT HURRICANES.GOV/GRAPHICS_EP5.SHTML?RAINQPF.
STORM SURGE: A DANGEROUS STORM SURGE IS POSSIBLE ALONG THE IMMEDIATE
COAST NEAR LAS ISLAS MARIAS. NEAR THE COAST, THE SURGE WILL BE
ACCOMPANIED BY LARGE AND DESTRUCTIVE WAVES.
SURF: SWELLS GENERATED BY SIMON WILL AFFECT PORTIONS OF THE COAST
OF SOUTHWESTERN AND WEST-CENTRAL MEXICO DURING THE NEXT FEW DAYS.
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 200 AM MST.
FORECASTER REINHART
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