898
FXUS65 KREV 212058
AFDREV

Area Forecast Discussion
National Weather Service Reno NV
158 PM PDT Fri Jun 21 2024

.SYNOPSIS...

* Trending warmer into the weekend with enhanced afternoon
  breezes and widespread dry conditions.

* Temperatures will be nearing 100 degrees in hotter valleys this
  weekend. Plan on widespread Moderate HeatRisk over the weekend.

* Slightly cooler temperatures along with typical west-southwest
  breezes will arrive for the latter half of next week.

&&

.DISCUSSION...

* The weak upper low that had continued our comfortable
  temperatures has exited the region. High pressure will once
  again build across the southwestern US with a broad upper low
  over the PacNW. This pattern will allow for dry weather,
  increasing temperatures, and enhanced afternoon breezes through
  the weekend. Breezy conditions coupled with RH values in the
  single digits to low teens will lead to enhanced fire weather
  concerns for portions of western NV and eastern Lassen County
  this weekend, especially Sunday.

* It will be a hot one this weekend! Temperatures under the
  building ridge will near the century mark for much of western
  NV, eastern Lassen County, and the lower elevations of Mono
  County. The Sierra communities will be pushing into the mid to
  upper 80s, and even a few isolated low-90s. For Saturday, Reno
  Airport has a 75% chance of tying the record high (which is
  100F), and a 55% chance of breaking that record. The last time
  we reached 100F or greater at the Reno Airport was July 23rd of
  last year. However, this would be early for the first 100F day
  of the year, which is normally July 14th.

* As a result of the incoming heat, we anticipate a Moderate
  HeatRisk may cause concerns for vulnerable populations. Look out
  for heat illnesses, stay hydrated, wear sunscreen and take care
  of those who may need assistance with cooling down. The good
  news of these temperatures is the cool overnight lows, which
  will help lessen the impacts of the afternoon heat.

* For Monday into Tuesday, we`ll continue to be sandwiched between
  the high pressure centered to the southeast and the broad upper
  low centered to our northwest. This setup will slightly cool
  temperatures around 2-4 degrees. But, we`ll remain above average
  for late June. By Wednesday and Thursday, ensembles show the
  high pressure over the western US breaking down while the
  aforementioned upper low moves through the PacNW. This will
  decrease temperatures back to average (which is 90F by the
  28th), enhance afternoon winds, and continue our very dry
  conditions. With those ingredients in place, enhanced fire
  danger is an issue by the middle of next week. -McKellar

&&

.AVIATION...

* Heat building in over the region may cause some density altitude
  flying issues. Lower valley terminals will hover near 100 for
  Saturday and Sunday. Sierra terminals will see upper 80s this
  weekend for daytime highs.

* Otherwise, we`ll have VFR conditions, light winds, and typical
  afternoon breezes. -McKellar/HRICH

&&

.REV Watches/Warnings/Advisories...
NV...None.
CA...None.
&&

$$