778
FXUS66 KHNX 170610
AFDHNX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
1110 PM PDT SUN AUG 16 2026
KEY MESSAGES
1. TEMPERATURES WILL GRADUALLY WARM THIS WEEK AND RISE BACK TO
AROUND 5 DEGREES ABOVE AVERAGE BY THE MIDDLE OF THE WEEK.
2. BREEZY CONDITIONS TAKE PLACE OVER TYPICAL WIND-PRONE AREAS
INCLUDING SAN LUIS RESERVOIR, LAKE ISABELLA AND THE MOJAVE
DESERT SLOPES THROUGH THIS WEEK.
DISCUSSION
SEASONABLE TEMPERATURES REMAIN EXPECTED OVER CENTRAL CALIFORNIA
INTO THE UPCOMING WEEK AS THE REGION IS LOCATED BETWEEN TWO
LARGE-SCALE AIR MASSES. A LOW PRESSURE SYSTEM TO THE WEST OVER
THE EASTERN PACIFIC IS PUSHING UPPER LEVEL MOISTURE OVER MOST OF
CLAIFORNIA, RESULTING IN HIGH CLOUD COVER BUT WITH LITTLE IS ANY
PRECIPITATION. MEANWHILE, A HIGH PRESSURE RIDGE IS CENTERED OVER
THE SOUTHERN UNITED STATES WHICH IS EXPECTED TO SLOWLY SHIFT
WESTWARD, BUILDING TO A PEAK BETWEEN WEDNESDAY AND THURSDAY.
BOTH OF THESE DAYS THERE IS A 65 TO 75 PERCENT PROBABILITY FOR
MAXIMUM TEMPERATURES TO EXCEED 100 DEGREES ACROSS THE SAN
JOAQUIN VALLEY, WITH GREATER PROBABILITIIES BETWEEN 90 AND 100
PERCENT IN THE MOJAVE DESERT. THESE WARMER TEMPERATURES WILL
CAUSE WIDESPREAD MINOR HEAT RISK WITH INCREASING AREAS OF
MODERATE HEAT RISK ACROSS THE LOWER ELEVATIONS MIDWEEK. THESE
HEAT IMPACTS ARE DUE IN PART TO THE EXPECTED OVERNIGHT
TEMPERATURES, ESPECIALLY IN THE URBAN AND FOOTHILL AREAS, WHERE
THERE IS AT LEAST A 75 PERCENT PROBABILITY FOR OVERNIGHT LOWS TO
EXCEED 70 DEGREES. HOWEVER, IN THE REMAINING VALLEY AREAS, THERE
IS LESS THAN A 10 PERCENT PROBABILITY FOR OVERNIGHT MINIMUMS TO
EXCEED 70.
DUE TO THE RISING TEMPERATURES, RELATIVE HUMIDITIES ACROSS
CENTRAL CALIFORNIA WILL BE ON THE DOWNTREND. MINIMUM VALUES WILL
APPROACH A LOW OF 15 TO 20 PERCENT IN THE SAN JOAQUIN VALLEY
MIDWEEK, WITH SIMILAR VALUES IN THE SIERRA NEVADA, BUT SINGLE-
DIGITS IN THE MOJAVE DESERT. HOWEVER, MODERATE TO GOOD OVERNIGHT
RECOVERIES ARE EXPECTED; VALUES OF 50 TO 60 PERCENT WILL BE
PRESENT ACROSS MUCH OF THE REGION. WINDS ACROSS CENTRAL
CALIFORNIA ARE PRIMARILY EXPECTED TO BE LIGHT AND DIURNAL EXCEPT
FOR THE MOST WIND-PRONE AREAS INCLUDING SAN LUIS RESERVOIR, LAKE
ISABELLA, AND THE MOJAVE DESERT SLOPES IN THE LEE OF THE
TEHACHAPI RANGE.
AVIATION
VFR CONDITIONS WILL PREVAIL 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.
PUBLIC/AVIATION...MCCOY
WEATHER.GOV/HANFORD
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