679
NGUS86 KRSA 141315
HCMRSA
HYDROMETEOROLOGICAL COORDINATION MESSAGE
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
615 AM PDT THU MAY 14 2026
..DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES TODAY/TOMORROW
...COOLING OVER THE WEEKEND WITH SLIGHT CHANCE OF SHOWERS OVER NV ON
SUNDAY...
METEOROLOGICAL CONDITIONS (THU AM - WED AM)
HIGH PRESSURE SITS OFFSHORE OF CA STRETCHED ACROSS MUCH OF THE
EASTERN PACIFIC WITH A QUASI-ZONAL FLOW REGIME JUST NORTH. THIS WILL
ALLOW A SERIES OF TROUGHS TO MOVE INTO THE PAC THE REST OF THE WEEK.
TROUGHING WILL THEN EXPAND FURTHER SOUTH INTO CA OVER THE WEEKEND.
500MB HEIGHTS WILL REMAIN HIGH ENOUGH TODAY AND TOMORROW TO KEEP
TEMPERATURES ABOUT 5 TO 10 DEG F ABOVE SEASONAL AVERAGES FOR MUCH OF
THE REGION BEFORE COOLING DOWN TO BELOW NORMAL OVER THE WEEKEND AS
THAT TROUGHING DIGS IN. THE CORE OF THE TROUGH OVER THE PACNW
SATURDAY WILL BEGIN TO DESCEND INTO NRN NV ON SUNDAY SWEEPING
THROUGH FROM NW TO SE EXITING ON MONDAY. THERE IS SOME DISAGREEMENT
ON THE TIMING AND DEPTH OF THE SYSTEM BETWEEN THE GFS AND ECMWF. THE
GFS IS QUICKER TO MOVE IT THROUGH AND DOES SO MOSTLY DRY. THE DET
ECMWF AS WELL AS A NUMBER OF ITS ENSEMBLE MEMBERS DO DROP SOME LIGHT
PRECIP OVER NV AS IT PASSES THROUGH. OFFICIAL FORECAST DID BLEND IN
SOME OF THE DET ECMWF TO SHOW LIGHT PRECIP OVER NV FOR SUNDAY.
AMOUNTS FOR NOW COME OUT TO LESS THAN 0.10" EXCEPT LOCALLY A LITTLE
HIGHER OVER THE NE MOUNTAINS.
LINGERING INFLUENCE OF THE TROUGH ON MONDAY WILL KEEP TEMPERATURES
NEAR NORMAL BEFORE WARMING BACK UP GRADUALLY THROUGHOUT THE WEEK AS
HIGH PRESSURE TRIES TO RE-ASSERT ITSELF. CONTINUED TROUGHING INTO
THE PACNW WILL SUPPRESS THIS SOME, BUT EXPECTING TEMPERATURE
ANOMALIES OF +5 TO +10 DEG F ACROSS MOST OF CA BY MID-WEEK. DRY
CONDITIONS AS WELL WITH SUNDAY BEING THE ONLY DAY FOR POTENTIAL
SHOWERS.
FREEZING LEVELS 10-14.5 KFT THE REST OF THE WORK WEEK LOWERING OVER
THE WEEKEND TO ABOUT 8-13.5 KFT ACROSS CA. LEVELS WILL RISE BACK UP
NEXT WEEK TO 11-13 KFT.
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
AS
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