819
FXUS66 KHNX 271828
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
1128 AM PDT MON APR 27 2026
KEY MESSAGES
1. WIDESPREAD PRECIPITATION ENDS TODAY FOR MOST OF SAN JOAQUIN
VALLEY. THUNDERSTORM CHANCES WITHIN THE SIERRA NEVADA TODAY.
2. TEMPERATURES BEGIN TO RISE THIS WEEK AS RIDGING TAKES HOLD.
3.WARMING TREND TO END NEXT WEEK AS ANOTHER LOW MAKES ITS WAY
INTO THE AREA.
DISCUSSION
TEMPERATURES BEGIN TO WARM UP THIS WEEK AS THE LOW PRESSURE
SYSTEM THAT BROUGHT WIDESPREAD RAIN TO THE CWA BEGINS TO MAKE
THE TREK EASTWARD. TODAY, THERE IS A FEW LINGERING SHOWERS IN
THE NORTHERN PORTION OF THE CWA, PARTICULARLY IN THE SIERRA
NEVADA MOUNTAINS. THE MOUNTAINOUS AREAS HAVE A 10 TO 15 PERCENT
CHANCE OF THUNDERSTORMS TODAY TOO. IF ANY STORMS GO UP, IT WON'T
BE UNTIL THE AFTERNOON HOURS.
BESIDES THAT, THE WEATHER IS GOING TO BE QUIETING DOWN THIS
WEEK. THERE ARE A FEW SHORT WAVE TROUGHS EXPECTED TO COME IN,
KEEPING OUR TEMPERATURES FROM GOING TOO FAR ABOVE NORMAL. BY
THURSDAY AND INTO THE WEEKEND, A RIDGE WILL BUILD AND BEGIN TO
WARM UP TEMPERATURES WITHIN THE CWA. THE VALLEY HAS A 90 PERCENT
CHANCE TO SEE TEMPERATURES EXCEEDING THE MID 80S AND A 10
PERCENT CHANCE OF MEETING OR EXCEEDING THE MID 90S BY SATURDAY.
LOOKING LONG TERM, ANOTHER TROUGH IS LOOKING TO COME THROUGH
MID-NEXT WEEK. IT LOOKS TO BE ANOTHER CLOSED LOW, WHICH ARE
NOTORIOUSLY HARD TO FORECAST THIS FAR OUT. FOR NOW, IT IS IN
LINE WITH WHAT THE CLIMATE PREDICTION CENTER HAS FORECASTED.
THEIR 6-10 DAY OUTLOOK HAS THE VALLEY WITH 40 TO 60 PERCENT
CHANCE OF ABOVE NORMAL FOR THIS TIME OF YEAR PRECIPITATION.
AVIATION
IFR TO MVFR CONDITIONS OVER THE SIERRA NEVADA FROM 18Z MONDAY
THROUGH 00Z TUESDAY IN SHOWERS AND POSSIBLE THUNDERSTORMS THIS
AFTERNOON. OTHERWISE, VFR CONDITIONS WILL PREVAIL FOR THE NEXT
24 HOURS. WINDS OF 15 TO 25 MPH IN THE MOJAVE SLOPES AND DESERT
THROUGH 12Z MONDAY WITH GUSTS UP TO 55 MPH.
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.
PUBLIC...BB
AVIATION....BB
WEATHER.GOV/HANFORD
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