797
NGUS86 KRSA 151329
HCMRSA
HYDROMETEOROLOGICAL COORDINATION MESSAGE
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
630 AM PDT FRI MAY 15 2026
..PRECIP CHANCES INCREASE OVER NORTHERN/EASTERN NV ON SUN
..COOLER TEMPS THIS WEEKEND WARM TO ABOVE NORMAL BY NEXT WED-THU
METEOROLOGICAL CONDITIONS (FRI AM - THU AM)
ZONAL ONSHORE FLOW IS GENERALLY FOCUSED BETWEEN 40N AND 50N THIS
MORNING WITH A S/WV TROF ALONG 135W MAKING ITS WAY TOWARD THE
PACIFIC NORTHWEST AND SOUTHWEST BC. A FLATTENED UPR RIDGE RESIDES
OFF THE CA COAST PRETTY MUCH ALONG 140W. THROUGH TODAY...THE PATTERN
WILL BEGIN TO START TO BUCKLE AS THE S/WV TROF SHIFTS INLAND WITH
THE OPPORTUNITY FOR SOME LIGHT PRECIP MAKING ITS WAY DOWN TO THE
CREST OF THE SOUTHERN OR CASCADES. FOR THIS WEEKEND...LOOK FOR THIS
OVERALL SYSTEM TO DIG OVER THE INTERIOR ON ITS WAY TOWARD THE GREAT
BASIN...BRINGING AN AREA OF MAINLY LIGHT PRECIP TO NORTHERN AND
EASTERN NV ON SUNDAY. AMOUNTS WILL GENERALLY REMAIN NEAR OR LESS
THAN 0.25-INCH.
GIVEN THIS FLOW REGIME ON SUNDAY...DRY NORTHERLY FLOW WILL DEVELOP
ACROSS CA AS THE AREA IS SANDWICHED BETWEEN THE DIGGING S/WV TROF
OVER THE GREAT BASIN AND A BUILDING UPR RIDGE OFFSHORE BETWEEN 130W
AND 140W. INTO NEXT WORK WEEK...THE GENERAL TROFFING OVER THE
INTERIOR WILL SHIFT FARTHER TO THE EAST...WHILE THE OFFSHORE UPR
RIDGE BECOMES QUITE BROAD AND STRETCHES OVER MUCH OF THE EASTERN
PACIFIC AND THE WESTERN US. THIS WILL ALLOW TEMPERATURES TO REBOUND
FROM BEING MAINLY BELOW NORMAL THIS WEEKEND TO ANYWHERE FROM PLUS 5-
TO PLUS 15-DEGF OVER SEASONAL NORMALS BY WEDNESDAY INTO THURSDAY.
FREEZING LEVELS CURRENTLY RANGE FROM 8000- TO 11000-FEET OVER THE
NORTHERN PORTION OF THE REGION TO 12000- TO 14000-FEET ACROSS THE
SOUTHERN HALF. AS THE SYSTEM DIGS FROM THE PACIFIC NORTHWEST TO THE
GREAT BASIN...THE FREEZING LEVEL GRADIENT BECOMES MORE NORTHEAST TO
SOUTHWEST ORIENTED WITH A RANGE OF 6000- TO 7000-FEET OVER THE
HUMBOLDT RIVER BASIN TO 13000- TO 14000-FEET ALONG THE SOUTHERN CA
COAST. THESE WILL BECOME A BIT MORE UNIFORM BY THE MIDDLE OF NEXT
WEEK UNDER HIGH PRESSURE WITH 12500- TO 13500-FEET THROUGHOUT THE
AREA.
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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