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AGUS76 KRSA 271318
HMDRSA

Hydrometeorological Discussion
National Weather Service / California Nevada RFC / Sacramento CA
620 AM PDT Mon May 27 2024

...SCATTERED SHOWERS/T-STORMS TODAY MAINLY CREST SOUTHERN SIERRA...
...SYSTEM TRAVERSING THE REGION TUE/WED INCREASES SHOWER CHANCES FOR
HIGHER TERRAIN MAINLY N AND E...

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

An upr low continues to reside over the Gulf of Alaska...extending
southward with cyclonic flow over the northeast Pacific. Also this
morning...an upr ridge is beginning to pump up over the interior
resulting in the flow aloft turning a bit more to the southwest. For
today...models are hinting at the possibility of a few afternoon and
early evening showers/t-storms developing with the best opportunity
appearing to be across the crest of the southern Sierra. Then into
tomorrow...a s/wv trof will rotate through the cyclonic flow aloft
and make its way toward the BC and Pacific Northwest
coast...stretching far enough south to bring scattered showers to
the upper Klamath River basin and northeast CA over toward northern
NV. Also...there appears to be enough moisture and lift to generate
some scattered showers/t-storms over the southern Sierra and then
northeast over central NV. This will linger into Wednesday across
portions of northeast NV close to the ID and UT border as the s/wv
trof shifts inland and finally east of the area by the late
afternoon and early evening hours. Heights will then rise for the
end of the week into the weekend with general westerly flow aloft.

Temperatures are expected to bump up a bit the next couple days as
the cooler below normal temperatures from the weekend are now in the
rearview mirror. Look for anomalies generally from a few degF above
normal to as much as plus 10-degF over seasonal norms...except along
the immediate coast where the marine influence will continue. As the
s/wv trof moves across the area...look for temperatures during the
middle of the week to level off or even drop a bit compared to
Mon/Tue. Then as this system moves out...and height rise across the
region...temperatures will once again rebound above normal from
about plus 5- to plus 10-degF...except along the immediate coast.



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



Kozlowski

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