851
NGUS86 KRSA 211320
HCMRSA
HYDROMETEOROLOGICAL COORDINATION MESSAGE
NATIONAL WEATHER SERVICE / CALIFORNIA-NEVADA RFC / SACRAMENTO CA
620 AM PDT FRI AUG 21 2026
...INCREASING CHANCES OF SHOWERS/T-STORMS OVER E NV AND SE CA
THROUGH MONDAY...
..TEMPERATURES HOVERING AROUND AVERAGE THROUGH THE PERIOD
METEOROLOGICAL CONDITIONS (FRI AM - THU AM)
AN UPPER LOW OFFSHORE CONTINUES TO MAKE ITS WAY TOWARDS THE PACNW AS
A STRONG UPPER RIDGE RESIDES OVER THE FOUR CORNERS. AREAS CLOSER TO
THE LOW SHOULD SEE NEAR TO BELOW NORMAL TEMPERATURES TODAY WHILE
THOSE CLOSER TO THE RIDGE NEAR TO ABOVE NORMAL TEMPERATURES
(ANOMALIES -10 TO +10 DEG F). ADDITIONALLY, CONTINUED CHANCES OF
SHOWERS AND THUNDERSTORMS OVER SE CA AND MUCH OF NV AS MID LEVEL
MOISTURE AND INSTABILITY ROTATE OVERHEAD. THE OFFSHORE LOW WILL
SHRINK IN SIZE AS IT HEADS INTO THE PACNW OVER THE WEEKEND.
ADDITIONAL SYSTEMS OVER THE GULF OF ALASKA AND OFFSHORE OF THE PACNW
WILL KEEP THE GENERAL PATTERN OF TROUGHING OFFSHORE AND HIGH
PRESSURE INLAND THROUGHOUT THE REST OF THE FORECAST PERIOD. THIS IS
EXPECTED TO KEEP MOST OF THE REGION NEAR SEASONAL AVERAGES AS FAR AS
TEMPERATURES GO. CHANCES OF SHOWERS AND THUNDERSTORMS EXPECTED TO
PERSIST THROUGH MONDAY OVER SE CA, PARTS OF THE SIERRA (SAT AND SUN)
AND NV. AFTER THAT, MODELS SHOW DRIER AIR MOVING OVER MUCH OF CA
DIMINISHING CHANCES OF CONVECTION. THERE MAY STILL BE SOME ACTIVITY
OVER FAR SE CA AND SRN NV.
FREEZING LEVELS EXPECTED BETWEEN 13-16.5 KFT THROUGH THE PERIOD WITH
SOME FLUCTUATIONS.
PLEASE NOTE: THIS PRODUCT MAY NOT BE ROUTINELY UPDATED.
PLEASE REFER TO THE FOLLOWING PRODUCT ISSUED BY THE CNRFC
WWW.CNRFC.NOAA.GOV/DAILY-BRIEFING FOR A GRAPHICAL SUMMARY OF
WEATHER AND HYDROLOGIC CONDITIONS.
QPF GRAPHICS ARE AVAILABLE AT WWW.CNRFC.NOAA.GOV/QPF.PHP
*********************** CONTACT INFORMATION ************************
CNRFC OFFICE HOURS PHONE: 1 (916) 979-3056 EXTENSION 338
AFTER-HOURS CALLING SERVICE: 1 (800) 218-0858
LEAVE NAME...OFFICE...AND PHONE NUMBER
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