199
FXHW01 KWNH 120900
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EST FRI DEC 12 2025
VALID 00Z SAT 13 DEC 2025 - 00Z SAT 20 DEC 2025
...HEAVY RAINS FOR THE WESTERN HAWAIIAN ISLANDS SATURDAY NIGHT
THROUGH WEDNESDAY...
A WEAK FRONT IS FORECAST TO STALL OVER MAUI LATE THIS WEEK AND
DISSIPATE. THIS COULD PROVIDE CONVERGENCE FOR SOME SHOWERS ACROSS
THE CENTRAL ISLANDS, WHILE TRADES STAY WEAK ENOUGH TO ALLOW FOR
LAND/SEA BREEZES.
A LOW PRESSURE SYSTEM LOCATED NORTHWEST OF THE STATE TRACKS EAST
ALONG 30N STARTING FRIDAY WITH THE ATTENDANT COLD FRONT REACHING
THE WESTERN ISLANDS SATURDAY NIGHT THEN STALLING INTO MONDAY.
BROAD SOUTHERLY FLOW WITH AMPLE MOISTURE IS LIKELY AHEAD OF THIS
FRONTAL ZONE, AND HEAVY RAIN IS LIKELY FOR KAUAI AND VICINITY. THE
FRONT IS FORECAST TO LIFT NORTH INTO NEXT WEEK IN RESPONSE TO
ANOTHER WAVE OF LOW PRESSURE, AND THEN BECOME STATIONARY THROUGH
WEDNESDAY IF NOT LONGER. THERE IS MORE UNCERTAINTY IF THE FRONT,
AND THUS THE ENHANCED MOISTURE CONVERGENCE, WILL STALL OVER OR
JUST WEST OF THE STATE BY MID TO LATE NEXT WEEK. REGARDLESS,
BEFORE THEN THERE IS CONTINUED CONFIDENCE IN A PROLONGED HEAVY
RAIN EVENT. AT LEAST DROUGHT RELIEF CAN BE EXPECTED OVER THE NEXT
WEEK FOR ALL BUT THE BIG ISLAND WHICH LOOKS TO STAY EAST OF THE
FRONTAL ZONES.
TATE
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