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Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
550 AM PDT Tue May 19 2026

...WARMING TREND TO END THE WEEK...
...MAYBE A PM SCATTERED SHOWER OVER THE SIERRA CREST THU-SUN...

.METEOROLOGICAL CONDITIONS (TUE AM - MON AM)...

The week continues with troffing over the interior of the western US 
while an upr ridge across the eastern Pacific moves slightly closer 
to the west coast...nudging the overall pattern just a bit to the 
east. This slight adjustment in the flow regime will bring 
increasing temperatures to the region through the end of the week 
with afternoon highs reaching plus 5- to plus 15-degF over seasonal 
averages...except along the immediate coast where marine influence 
will keep conditions in check.

Models are hinting at the possibility of some afternoon build ups or 
even some very scattered showers over the crest of the Sierra from 
Thursday onward. Low confidence in this occurring as moisture is 
quite limited. At this time...the 19/00Z EC is the most bullish with 
this scenario.

Freezing levels starting this morning close from 7000- to 8000-feet 
over eastern NV to 10000- to 12000-feet along coastal locations. As 
the high pressure ridge over the eastern Pacific moves closer to end 
the week...look for these to reach anywhere from about 12500- to 
14000-feet. 


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.