textproduct: Reno
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
* High pressure building overhead will bring dry conditions with light winds and valley inversions prevailing this week.
* Above average afternoon highs will persist through the upcoming week.
* The high pressure may weaken by next weekend with precipitation chances returning by the second week of February, but confidence is low.
DISCUSSION
Sierra ridge winds have decreased after peaking between 40-50 mph earlier today, as a weak departing shortwave brushes across the Pacific Northwest.
High pressure will then build in overhead with a blocking pattern keeping it in place through at least midweek. This will result in light winds with a return of valley inversions, and patchy freezing fog for fog-prone Sierra valleys including Truckee/Martis Valley and around Mono Lake. This fog isn't expected to be as persistent compared to last month, as increasing daylight hours, mostly sunny skies and less snow cover should allow better fog dispersion during the day. Mild daytime highs will continue, mainly in the 50s to lower 60s for much of this week.
This blocking pattern is projected to weaken later this week and next weekend, although incoming weather systems from the Pacific during this time frame look to be on the weak side and tracking too far north to bring precip to CA/NV. By the 2nd week of February, mainly on or after the 9th, the storm track shows a potentially better signal of pushing closer to the Sierra and bringing precip chances back to the region. However, confidence in this wetter outcome remains on the low side this many days out, as prior attempts in mid-late January to break down the persistent dry pattern were not successful. MJD
AVIATION
VFR conditions and light winds prevail through the upcoming week for most of the main terminals, with the more widespread cirrus coverage diminishing from north to south. This clearing increases the potential of patchy FZFG forming at KTRK between 09Z-15Z for the next few mornings. MJD
REV Watches/Warnings/Advisories
NV...None. CA...None.
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