Hydrometeorological Discussion
Issued by NWS California-Nevada RFC
Issued by NWS California-Nevada RFC
255 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 $$