417
FXUS66 KSTO 162009
AFDSTO
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
109 PM PDT WED APR 16 2025
DISCUSSION
SYNOPSIS
A CUTOFF LOW CONTINUES TO LINGER NEAR SOCAL THROUGH THURSDAY,
BRINGING CHANCES FOR ISOLATED PM MOUNTAIN/UPPER FOOTHILLS
THUNDERSTORM THE NEXT SEVERAL DAYS. ELSEWHERE DRY AND SEASONABLE
WEATHER PERSISTS THROUGH THURSDAY. AFTER THURSDAY, OVERALL DRIER
WEATHER IS EXPECTED TO PREVAIL THROUGH THE WEEKEND AND INTO NEXT
WEEK AS TEMPERATURES TREND SLIGHTLY ABOVE NORMAL.
KEY MESSAGES
* TODAY-THURSDAY:
-ISOLATED MOUNTAIN THUNDERSTORM CHANCES CONTINUE.
-TODAY: 20-30%, HIGHEST ALONG THE SIERRA/SOUTHERN CASCADES.
-THURSDAY: 5-15%, HIGHEST ALONG THE SIERRA SOUTH OF I-80.
-SEASONABLE TEMPERATURES PERSIST WITH HIGH TEMPERATURES IN THE
70S ACROSS THE DELTA, VALLEY, AND FOOTHILLS AND 50S TO 60S AT
HIGHER ELEVATIONS.
* FRIDAY - TUESDAY:
-ABOVE-NORMAL TEMPERATURES AND MINOR HEATRISK LATE WEEK, THROUGH
THE WEEKEND AND INTO EARLY NEXT WEEK ACROSS THE DELTA, VALLEY
AND FOOTHILLS. PERIODICALLY BREEZY WINDS EXPECTED AT TIMES.
-PROBABILITY OF HIGH TEMPERATURES 80 DEGREES F OR HIGHER:
- FRIDAY: 20-40%
- SATURDAY - SUNDAY: 40-70%
- MONDAY - TUESDAY: 50-80%
-PROBABILITY OF NORTHERLY WIND GUSTS > 30 MPH:
-FRIDAY: 40-70%, HIGHEST ALONG AND WEST OF THE INTERSTATE
5 CORRIDOR
CHANGES FROM PREVIOUS FORECAST
* NO SIGNIFICANT UPDATES.
AVIATION
VFR CONDITIONS EXPECTED OVER THE NEXT 24 HOURS AT TAF SITE, WITH
VALLEY WINDS 12-14 KT WITH GUSTS TO 20 TO 25 KT THROUGH 06Z. THE
DELTA WILL SEE WESTERLY GUSTS 15 TO 25 KTS THROUGH 09Z THURSDAY.
THERE IS A 15-25% CHANCE OF ISOLATED MOUNTAIN THUNDERSTORMS FROM
UNTIL 03Z THIS AFT/EVE.
STO WATCHES/WARNINGS/ADVISORIES
NONE.
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