682
FXHW01 KWNH 030750
PMDHI
HAWAII EXTENDED FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
250 AM EST TUE MAR 3 2026
VALID 00Z WED 04 MAR 2026 - 00Z WED 11 MAR 2026
AN UPPER-LEVEL RIDGE WILL CONTINUE TO BUILD NORTH OF THE STATE
THROUGH MIDWEEK, WITH A STRONG UPPER HIGH AND ASSOCIATED POSITIVE
HEIGHT ANOMALIES DEVELOPING WELL TO THE NORTHEAST. THIS PATTERN
WILL SUPPORT SURFACE RIDGING THAT INITIALLY MAINTAINS A LOW-LEVEL
EASTERLY FLOW. BY THURSDAY, WINDS ARE FORECAST TO VEER MORE TO
THE EAST-SOUTHEAST AS AN UPPER TROUGH AND SURFACE FRONT APPROACH
FROM THE NORTHWEST. THIS FRONTAL BOUNDARY IS EXPECTED TO STALL
WELL NORTHWEST OF THE ISLANDS ON FRIDAY AS IT ENCOUNTERS THE
DOWNSTREAM BLOCKING HIGH. OVER THE WEEKEND, THE FRONT WILL LIFT
OUT AHEAD OF A DEEPENING LOW MOVING EAST ACROSS THE CENTRAL
PACIFIC, BUT THIS SYSTEM IS ALSO EXPECTED TO SLOW, KEEPING
ORGANIZED PRECIPITATION WEST OF THE MAIN ISLANDS THROUGH THE END
OF THE PERIOD. WINDS ARE EXPECTED TO VEER FURTHER TO THE SOUTHEAST
LATE IN THE PERIOD AHEAD OF THIS BOUNDARY.
DRIER AIR WRAPPING AROUND THE DOMINANT HIGH TO THE NORTHEAST WILL
KEEP PRECIPITABLE WATER ANOMALIES NEAR TO BELOW NORMAL ACROSS THE
ISLAND CHAIN THROUGH MUCH OF THE PERIOD. AN UPPER-LEVEL LOW IS
EXPECTED TO DEVELOP SOUTH OF THE UPPER HIGH OVER THE WEEKEND AND
LINGER EAST OF THE ISLANDS INTO EARLY NEXT WEEK. THIS MAY HELP
ORGANIZE SOME SHOWERS EAST OF THE BIG ISLAND, BUT SENSIBLE
WEATHER IMPACTS APPEAR GENERALLY LIMITED.
PEREIRA
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