textproduct: Reno

KEY MESSAGES

* Mostly dry and cool conditions will prevail through Wednesday, with temperatures warming to near seasonal averages this afternoon.

* Strong southwest winds are expected Monday, with light rain and mountain snow chances for northeast California.

* Increasing chances for unsettled weather and cooler temperatures return late week.

DISCUSSION

As of this morning, a dry and cool airmass remains entrenched across the Sierra and western Nevada. Today, we'll see temperatures peak as a ridge of high pressure builds eastward across the region. High temps today will reach the upper 50s to mid-60s in the Sierra and mid-60s to low 70s in western Nevada valleys. Southwest winds will remain light through this evening.

The main weather impact for Monday will be increasing winds associated with the approaching low pressure system. Sierra ridgetop winds are forecast to increase this evening into Monday, with peak gusts of 70-80+ mph. Surface gusts across the Sierra and western Nevada valleys will generally reach 30-45 mph. These winds could create outdoor recreation impacts and hazardous boating conditions on larger lakes. Precipitation chances on Monday are around 30-40% for far northeast California, the Surprise Valley and far north Washoe near the Oregon border. Otherwise, we'll be dry for the vast majority of the region on Monday.

By Tuesday, the low pressure system will have moved eastward, leading to clearing skies and a return to dry conditions. Temperatures will be slightly cooler than Monday but still near seasonal averages, with highs in the mid-50s to mid-60s across the region. Winds will also begin to diminish significantly.

Forecast confidence decreases slightly towards the end of the week as another upper-level trough is expected to deepen across the western U.S. by Friday and Saturday. There are some model variations on the exact handling of shortwaves and the depth/position of this trough, but the overall pattern suggests increasing chances for unsettled weather. Temperatures are expected to cool to the 40s and 50s for highs, with lows in the 20s and 30s.

-Justin

AVIATION

VFR conditions, light winds, and seasonable temperatures continue though Sunday. Then, an incoming low pressure system will likely bring mountain wave turbulence and LLWS Sunday night into Monday with terminal gusts of 25-35 kt Monday afternoon.

-Justin

REV Watches/Warnings/Advisories

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