514
FXHW01 KWNH 200605
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
205 AM EDT MON OCT 20 2025
VALID 00Z TUE 21 OCT 2025 - 00Z TUE 28 OCT 2025
THE MAIN SUBTROPICAL HIGH WILL BE CENTERED WELL TO THE NORTH OF
HAWAII THROUGH THE MIDDLE OF THIS WEEK. BY FRIDAY INTO NEXT
WEEKEND, THE ENSEMBLE MEANS ARE INDICATING THE SURFACE HIGH
REBUILDS CLOSER TO THE ISLANDS NEAR 30 DEGREES NORTH, AND THIS
HIGH SLOWLY WORKS ITS WAY TO A POSITION NORTHEAST OF THE STATE BY
NEXT MONDAY, WITH A COL DEVELOPING IN THE RIDGE AXIS.
A WEAK UPPER LEVEL TROUGH NEARBY WILL HELP SUSTAIN A MODEST
INVERTED TROUGH NEAR AND JUST SOUTH OF THE STATE GOING INTO MID-
WEEK, BUT IT DOES NOT APPEAR STRONG ENOUGH TO ADVECT DEEPER
MOISTURE FROM THE ITCZ NORTHWARD. THEREFORE, THE TYPICAL TRADE
WIND ENHANCED SHOWERS CAN BE EXPECTED ON MOST DAYS WITH NO MAJOR
RAIN EVENTS EXPECTED OVER THE COMING WEEK.
HAMRICK
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page