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NGUS86 KRSA 181310
HCMRSA
HYDROMETEOROLOGICAL COORDINATION MESSAGE
NATIONAL WEATHER SERVICE / CALIFORNIA-NEVADA RFC / SACRAMENTO CA
610 AM PDT THU JUN 18 2026
..PRECIP CHANCES INCREASE FOR NORTHERN AREAS FRI-SAT
..WARMING AND DRIER BY NEXT WEEK
METEOROLOGICAL CONDITIONS (THU AM - WED AM)
HIGH PRESSURE OVER THE EASTERN PACIFIC AND WEST COAST WILL BEGIN TO
SHIFT INLAND TODAY...EXPECTED TO REACH THE ROCKY MOUNTAINS BY FRIDAY
AND FARTHER DOWNSTREAM OVER THE PLAINS STATES BY THE WEEKEND. THIS
WILL BE REPLACED BY GENERAL TROFFING ALONG THE WEST COAST FOR FRIDAY
THROUGH THE WEEKEND...BEFORE STRONG HIGH PRESSURE BUILDS NEAR THE 4-
CORNERS REGION DURING THE FIRST HALF OF NEXT WEEK.
IN TERMS OF PRECIP...VERY SCATTERED SHOWERS AND T-STORMS ARE ONCE
AGAIN POSSIBLE OVER THE CREST OF THE SIERRA TODAY DURING THE
AFTERNOON AND EARLY EVENING HOURS. THEN INTO TOMORROW AND SATURDAY
AS A WEAK DISTURBANCE MOVES THROUGH THE GENERAL TROFFING ALONG THE
WEST COAST...PRECIP CHANCES WILL INCREASE OVER THE KLAMATH RIVER
BASIN DOWN ACROSS NORTHEAST CA AND MUCH OF THE SIERRA...AS WELL AS
FARTHER INLAND OVER NORTHERN NV. OVERALL...PRECIP AMOUNTS WILL
REMAIN NEAR OR LESS THAN 0.25-INCH...EXCEPT WHERE UNDER STRONGER
CONVECTIVE CELLS WHERE TOTALS MAY BE HIGHER. BY NEXT WEEK...AS THE
HIGH PRESSURE BUILDS OVER THE 4-CORNERS REGION...DRY CONDITIONS ARE
ANTICIPATED.
FREEZING LEVELS ARE CURRENTLY RUNNING FROM 15000- TO 17000-FEET
ACROSS THE REGION...DIP A BIT ACROSS NORTHERN AREAS FRIDAY THROUGH
THE WEEKEND (ABOUT 13000-FEET OR SO)...AND THEN BOUNCE BACK TO A
SIMILAR RANGE AS TODAY BY THE FIRST HALF OF NEXT WEEK.
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
DRK
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