829
FXUS66 KHNX 011744
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
1044 AM PDT TUE SEP 1 2026
KEY MESSAGES
1. BELOW SEASONAL AVERAGE TEMPERATURES WILL EXIST ACROSS THE
REGION THROUGH THE WEEKEND. A SLOW RISE IN TEMPERATURES BEGINS
NEAR THE MIDDLE OF NEXT WEEK.
2. PRECIPITATION CHANCES INCREASE BY THIS WEEKEND WITH THE BEST
CHANCES OF PRECIPITATION EARLY NEXT WEEK.
DISCUSSION
STRONG TROUGHING HAS SET UP OVER THE WEST COAST OF THE CONUS,
LEADING TO A SIGNIFICANT DECREASE IN TEMPERATURES FOR THE
REGION, WITH HIGHS 10 DEGREES BELOW NORMAL AND LOWS IN THE MID
TO UPPER 50'S IN MUCH OF THE LOWER ELEVATIONS OF OUR CWA. THIS
PATTERN IT EXPECTED TO CONTINUE THROUGH FRIDAY AND INTO THE
WEEKEND. ALONG WITH THE STRONGER WAVE MOVING THROUGH THE REGION,
MINRHS ARE EXPECTED TO INCREASE COMPARED TO YESTERDAY.
LOOKING TO THIS LABOR DAY WEEKEND, A STORM SYSTEM MOVING DOWN
FROM THE NORTHWEST IS EXPECTED TO CROSS CENTRAL AND SOUTHERN
CALIFORNIA AND CAUSE SOME LIGHT PRECIPITATION, WITH AROUND A 33%
CHANCE FOR A HALF AN INCH OR MORE THIS SUNDAY AROUND THE
SOUTHERN SIERRA NEVADA, TEHACHAPI MOUNTAINS AND INTO EACH OF
THEIR RESPECTIVE FOOTHILLS. THERE IS ALSO A 10% CHANCE FOR AN
INCH OF RAINFALL ON THAT DAY AT THE HIGHER ELEVATIONS IN THOSE
AREAS. AS OF CURRENT MODEL RUNS, THE TROPICAL SYSTEM THAT FORMED
THIS MORNING IS NOT LIKELY TO HAVE A DIRECT IMPACT ON CENTRAL
AND SOUTHERN CALIFORNIA, THOUGH IT MAY CONTRIBUTE A SMALL AMOUNT
OF MOISTURE TO THE UPCOMING STORM SYSTEM COMING OUT OF THE
NORTH THIS WEEKEND.
THE LONG TERM FORECAST IS STILL HOLDING A TROUGH OVER MUCH OF
THE WEST COAST, WHICH WOULD KEEP TEMPERATURES BELOW NORMAL. THE
CLIMATE PREDICTION CENTER CURRENTLY HAS OUR CWA IN NEAR NORMAL
TEMPERATURES FOR THE 6 TO 10 DAY OUTLOOK AND LEANING ABOVE
NORMAL FOR THE 8 TO 14 DAY OUTLOOK, SUGGESTING THE TROUGH MAY
WEAKEN OR PULL NORTHWARDS BY THAT TIME, AS BELOW NORMAL TEMPS
ARE SUSTAINED IN THE PACIFIC NORTHWEST. PRECIPITATION CONTINUES
TO LEAN ABOVE NORMAL DUE TO THE INCREASED TROUGH ACTIVITY
EXPECTED DURING THAT TIME.
AVIATION
VFR CONDITIONS PREVAILING FOR THE NEXT 24 HOURS.
AIR QUALITY ISSUES
NONE.
CERTAINTY
THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS HIGH.
THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS MEDIUM.
CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT
WWW.WEATHER.GOV/HNX/CERTAINTY.HTML FOR ADDITIONAL INFORMATION
AND/OR TO PROVIDE FEEDBACK.
HNX WATCHES/WARNINGS/ADVISORIES
NONE.
EW
WEATHER.GOV/HANFORD
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