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AGUS76 KRSA 181322
HMDRSA

Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
625 AM PDT Fri Apr 18 2025

...SHOWERS TODAY MAINLY SOUTH AND EAST...
...WEAK SYSTEMS IMPACTING FAR NORTHERN AREAS SUN AND AGAIN TUE/WED...

.METEOROLOGICAL CONDITIONS (FRI AM - THU AM)...

Pattern this morning shows an upr trof stretching from central
Canada back toward the southwest to the Great Basin with the base of
this feature dropping southward toward the Desert Southwest. At the
same time high pressure resides over the eastern Pacific. Still
looking at one more day of potential showers across the southern
Sierra from about the upper San Joaquin River basin southward and
the coastal mountains of southern CA from the eastern San Gabriel
Mountains over to the San Bernardino Mountains and then southward
over the Peninsular ranges. Also...radar imagery shows a few showers
closer to the upr troffing over eastern NV mainly right along the
border with UT. Overall...amounts will be rather limited and
scattered to a few hundredths of an inch up to about 0.10-inch.

Into Saturday...the upr trof will finally begin to swing toward the
east across the 4-Corners region and central/southern
Rockies...while a brief upr ridge slides across CA and NV and
weakens. This will put the region in a general west to northwest
flow through the middle of the week with meager disturbances moving
with the flow across the Pacific Northwest and clipping northern CA
into northern NV. This may generate some light showers on Sunday and
again Tuesday into Wednesday.

More interesting will be the end of the next week as a deeper area
of low pressure looks to move toward the west coast for the weekend.
This would bring cooler conditions with precip chances increasing
across the area.


QPF graphics are available at www.cnrfc.noaa.gov/qpf.php



Kozlowski

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