Hydrometeorological Discussion
Issued by NWS California-Nevada RFC

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AGUS76 KRSA 021734
HMDRSA

HYDROMETEOROLOGICAL DISCUSSION
NATIONAL WEATHER SERVICE / CALIFORNIA NEVADA RFC / SACRAMENTO CA
930 AM PST MON MAR 2 2015

...SHOWERY CONDITIONS PORTIONS OF CNTRL/SRN CA AND NV INTO TUE THEN
DRY THROUGH THE REST OF THE WEEK...

.24 HOUR PRECIPITATION TOTALS (ENDING MAR 2 AT 400 AM PST)...

A LOW PRESSURE SYSTEM CURRENTLY CENTERED JUST OFF THE SOUTHERN CA
COAST BROUGHT RAIN AND SNOW TO SOUTHERN CA/NV ON SUNDAY.

THE HEAVIEST AMOUNTS WERE OBSERVED ACROSS SOUTHERN CA. LOCATIONS
ALONG THE COAST SOUTH OF POINT CONCEPTION PICKED UP BETWEEN 0.25-
0.50". PRECIP TOTALS WERE HEAVIER FURTHER SOUTH RANGING FROM 0.50"
TO OVER 1" NEAR SAN DIEGO AND THE SURROUNDING MOUNTAINS. RAINFALL
STRETCHED INTO THE CA DESERT AND FAR SOUTHERN NV... PRECIP TOTALS
HERE WERE BETWEEN 0.25-0.50".

LIGHTER PRECIP WAS OBSERVED ACROSS THE CENTRAL/SOUTHERN SIERRA AND
NEVADA. AMOUNTS HERE WERE GENERALLY LESS THAN 0.10".


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

THERE ARE A COUPLE OF FEATURES TO NOTE THIS MORNING, WITH ONE TROUGH
SWINGING INTO ERN NV SWD INTO SRN CA THIS MORNING, WHILE AN UPPER
LOW DROPS INTO NRN CA FROM THE NORTH.  STEADY PRECIP OVER SE CA/NV
HAS MAINLY MOVED INTO AZ/UT THIS MORNING, WHILE SHOWERS AFFECT
MAINLY PORTIONS OF SRN CA, THE CNTRL VALLEY, AND THE SIERRA.
EXPECTING SHOWERY CONDITIONS TO CONTINUE ACROSS MUCH OF CNTRL/SRN CA
AND ALL BUT NW NV THIS AFTERNOON UNDER A BROAD TROUGH AND WITH SOME
WEAK INSTABILITY OVER THE REGION AS WELL.  EXPECT ONLY A FEW LIGHT
SHOWERS LINGERING ACROSS THE SRN CA COAST TONIGHT, AS WELL AS
CONTINUED SHOWERS IN NE NV INTO TUE MORNING AS A SHORTWAVE MOVES
THROUGH.  BY TUE AFTERNOON, EXPECT JUST A FEW SHOWERS IN SRN
PORTIONS OF CA/NV WITH WEAK INSTABILITY AS THE TROUGH MOVES EAST.
WED LOOKS DRY WITH GENERALLY NLY FLOW ALOFT.  EXPECT FREEZING LEVELS
5500-6500 FT, EXCEPT LOWERING TO 3500-4500 FT IN NE NV LATE TONIGHT.


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

THE FORECAST PERIOD WILL BE DOMINATED BY HIGH PRESSURE OVER THE
EASTERN PACIFIC. CONDITIONS LOOK DRY ACROSS THE FORECAST AREA
THROUGH THE PERIOD.

.HYDROLOGICAL CONDITIONS...

PRECIPITATION DURING THE LAST 24 HOURS PRODUCED VERY SMALL RISES ON
MANY SOUTH COAST STREAMS AND RIVERS.  THE SAN DIEGO RIVER AT FASHION
VALLEY EXPERIENCED A MINOR RISE THAT CRESTED EARLY YESTERDAY
EVENING.  RIVER STAGES IN THE SIERRA NEVADA AND CENTRAL VALLEY HAVE
MORE OR LESS REMAINED STABLE.

SMALL RISES ARE CONTINUING ON SOME SOUTH COAST STREAMS AND RIVERS
DUE TO RUNOFF FROM YESTERDAY`S WEATHER SYSTEM.  THESE SMALL RISES
SHOULD CREST WITHIN THE NEXT 24 HOURS AND THEN STAGES WILL SLOWLY
RECEDE DURING THE NEXT FEW DAYS.

ALL STAGES ARE EXPECTED TO REMAIN BELOW MONITOR LEVELS THROUGH THE
NEXT SEVERAL DAYS.


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

MI/KL/MI/AT

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