textproduct: Reno

KEY MESSAGES

* Temperatures warm to around 5-10 degrees above normal by mid to late week.

* Warming temperatures will support afternoon terrain buildups near the Sierra, with low-end thunder chances Thursday into the weekend.

* Afternoon west breezes continue this week, with somewhat stronger breezes possible by Memorial Day into Tuesday.

DISCUSSION

High pressure building over the West will bring a steady warming trend through the week, with highs running around 5-10 degrees above normal by mid to late week. Western Nevada valleys will warm into the lower to mid 80s, with Sierra communities mainly in the upper 60s to 70s. Most areas remain dry, with little to no measurable precipitation expected through the week.

The warming trend will also drive weak terrain-driven instability near the Sierra into the latter half of the week. Wednesday still looks more like afternoon cumulus buildups near the Mono County crest rather than actual showers or storms, with thunder chances generally less than 5%. By Thursday and Friday, low-end shower and thunder chances expand northward into the Tahoe Basin, northeast California, and far western Nevada, though probabilities remain low, generally around 5-15% at best. Any showers or storms would be isolated, brief, and capable of little rainfall.

Memorial Day weekend remains warm with low-end thunder chances each afternoon, generally 5-10% for most areas and locally near 15% along favored higher terrain. This does not look like a widespread thunderstorm or wetting rainfall setup, but those outdoors should still keep an eye on the sky, especially near the Sierra and higher terrain. Afternoon west breezes continue through the week, with gusts generally 15-25 mph most days, then increasing somewhat by Memorial Day with gusts around 25-35 mph possible for portions of western Nevada.

-Johnston

AVIATION

VFR conditions are expected through the week with no significant visibility or precipitation impacts at the main terminals. Winds remain typical for late May, with afternoon west to southwest breezes most days. Peak gusts will generally remain around 15-25 kt.

Afternoon cumulus buildups are possible near the Sierra crest west of MMH Wednesday, with low-end isolated shower or thunderstorm chances Thursday into the weekend near the Sierra, northeast California, and far western Nevada. Terminal impact probabilities remain low, but any nearby buildup could produce localized gusty outflow winds and brief terrain obscuration near the Sierra crest.

-Johnston

REV Watches/Warnings/Advisories

NV...None. CA...None.