Hydrometeorological Discussion
Issued by NWS California-Nevada RFC

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AGUS76 KRSA 051527
HMDRSA

ZCZC RNOWRKHMD 051459
TTAA00 KRNO DDHHMM

HYDROMETEOROLOGICAL DISCUSSION
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
930 AM PST THU MAR 5 2015

...DRY THROUGH MUCH OF THE PERIOD...

.24 HOUR PRECIPITATION TOTALS (ENDING MAR 5 AT 400 AM PST)...

S/WV THAT PRODUCED MUCH OF THE ACTION OVER SRN CA AND NV OVER THE
EARLY HALF OF THE WEEK MOVED OUT OF THE REGION EARLY YESTERDAY...
LEAVING RIDGING AS THE DOMINATING FEATURE. THIS PRODUCED DRY
CONDITIONS FOR THE REGION OVER THE LAST 24-HRS.


.METEOROLOGICAL CONDITIONS (SHORT TERM: THU AM - SUN AM)...

WV/IR IMAGERY SHOWS AN UPR RIDGE SLIGHTLY CLOSER TO THE COAST THIS
MORNING AS COMPARED TO YESTERDAY...NOW ALIGNED ALONG 130W. A RATHER
WEAK AND MOISTURE STARVED UPR LOW IS SPINNING JUST WEST OF NORTHERN
BAJA (NEAR 30N/120W). THROUGH THE PERIOD...EXPECT THE WEAK UPR LOW
TO EJECT TOWARD THE ENE WITH THE UPR RIDGE MOVING OVER THE WEST
COAST. TEMPERATURES WILL WARM AND PRECIP WILL BE NON-EXISTENT OVER
THE SHORT-TERM.


.METEOROLOGICAL CONDITIONS (LONG TERM: SUN AM - WED AM)...

WHILE RIDGING WILL DOMINATE FOR THE EARLY PORTION OF NEXT WEEK...A
PATTERN SHIFT WILL SOON BE UPON US. BY TUESDAY...MODELS SHOW THE
RIDGE FLATTENING OUR AHEAD OF A DEVELOPING UPPER LOW OVER THE
EASTERN PACIFIC. THE 06Z GFS PLACES THIS UPPER LOW CENTERED NEAR
36N/143W BY EARLY WEDNESDAY...WITH AN INITIAL S/WV MOVING THROUGH
OREGON LATE TUES THROUGH EARLY WED. THIS FIRST WAVE IS EXPECTED TO
BRING LIGHT SHOWERS TO FAR NORTHERN PORTIONS OF CA AND SRN OREGON.
TIMING AND EXTENT IS STILL A LITTLE HAZY AT THIS POINT...WITH THE
00Z GFS BRINGING THE FEATURE THROUGH AS EARLY AS 00Z WED...THE 00Z
EC AROUND 06Z WED AND FURTHER SOUTH...AND THE 06Z GFS THE SLOWEST
AND FURTHEST NORTH. TOOK A COMPROMISE POSITION BETWEEN THE 00Z EC
AND THE 06Z GFS FOR THE CURRENT FORECAST...ONLY BRINGING IN LIGHT
PRECIP TO THE REGION FOR THE 06-12Z PERIOD WED AM.


.HYDROLOGICAL CONDITIONS...

WITH VERY LITTLE RAIN IN THE FORECAST, ALL RIVER LOCATIONS ARE
EXPECTED TO STAY WELL BELOW MONITOR LEVELS.  SOME VERY SMALL RISES
CAN BE EXPECTED IN THE SIERRA DUE TO SNOWMELT OVER THE NEXT FEW DAYS.


MORE INFORMATION ON THE CNRFC WEBSITE AT HTTP://WWW.CNRFC.NOAA.GOV

JM/DRK/JM/BW

$$



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