356
FXHW01 KWNH 140754
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
254 AM EST WED JAN 14 2026
VALID 00Z THU 15 JAN 2026 - 00Z THU 22 JAN 2026
LOW PRESSURE TO THE NORTHWEST OF HAWAII WILL UNDERGO AN OCCLUSION
WITH A COLD FRONT AT THE BASE OF THE MEAN TROUGH SWINGING THROUGH
BY WEDNESDAY AFTERNOON GENERATING A PERIOD OF SHOWERS ACROSS A
MAJORITY OF THE ISLANDS WITH THE GREATEST POTENTIAL FOR THE
WESTERN HALF OF THE ISLAND CHAIN, MAINLY WEST OF MAUI. FRONTAL
PROGRESSION WILL FADE AS IT MIGRATES TOWARDS THE LONGITUDE OF THE
BIG ISLAND LEADING TO A PERIOD OF WEAK TRADE WIND FLOW AS HIGH
PRESSURE SETTLES TO THE NORTH OF THE ISLANDS IN WAKE OF THE
FRONTAL PROGRESSION.
TRADE WIND PATTERN WILL EFFECT MORE OF THE TRADITIONAL
WINDWARD SIDE OF THE ISLANDS AS EASTERLY FLOW DOMINATES. THIS
PATTERN WILL CONTINUE INTO THE MIDDLE OF NEXT WEEK WITH ANOTHER
LOW PRESSURE UNDERGOING AN OCCLUSION TO THE NORTHWEST WITH A
SECOND FRONTAL PROGRESSION EXPECTED TO MOVE CLOSER TO THE ISLAND
BY WEDNESDAY NEXT WEEK. THERE'S A BIT OF DISCREPANCY ON THE
MAGNITUDE OF THE FRONT AS IT APPROACHES, HOWEVER THE OVERALL
PATTERN ON GUIDANCE IS RELATIVELY STABLE FOR THIS LEAD ACROSS THE
PACIFIC.
KLEEBAUER
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