Winchester, Nevada 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

329
FXUS65 KVEF 261104
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
403 AM PDT Thu Jun 26 2025

.KEY MESSAGES...

* Temperatures gradually rising near to above normal through early
  next week, resulting in Moderate HeatRisk.

* Slow return of moisture next week, with thunderstorm chances
  increasing for Mohave County as early as Tuesday and spreading
  farther northwest later in the week.
&&

.DISCUSSION...through Wednesday. Early morning satellite loop showed
clear skies areawide. Surface obs showed light winds and
temperatures about five degrees warmer than 24 hours ago. Overall,
there is very little change to forecast reasoning through early next
week. High pressure slowly building in from the southeast will lead
to temperatures gradually rising through the weekend into early next
week. Yesterday was probably the last sub-100 degree high
temperature at KLAS until a thunderstorm day occurs. (More on that
shortly.) Despite the rising highs, since we are well into the hot
season and within a few degrees of the climatological peak heat of
summer, HeatRisk only climbs into the Moderate category except for a
few splotches of Major on Monday. As noted by previous shifts, this
looks too isolated in space and time to justify any heat headlines,
but will keep an eye on it. The building ridge to the east plus weak
low pressure approaching from the Pacific will combine to bring a
weak influx of monsoon moisture into Mohave County as early as
Tuesday, with chances for thunderstorms slowly increasing and
expanding farther west Tuesday and Wednesday. For three straight
days, the GFS ensembles have been more bullish on this scenario than
the ECMWF. With each passing day, the NBM has been trending a bit
slower/more bearish with the onset of PoPs. Will continue to watch
trends in the details, but the main message is that thunderstorm
season is almost here.
&&

.AVIATION...For Harry Reid...For the 12Z Forecast Package...Winds
expected to remain light and follow typical, daily patterns through
the morning hours. By the afternoon, south-southeast breezes are
forecast to develop with speeds around 10 knots and gusts around 15
knots. Wind direction likely to range from 130-180 during this time.
By sunset, winds should return to their typical souths-southwest
direction. Clear skies with temperatures exceeding 100F between 21z
and 02z, peaking around 102F.

For the rest of southern Nevada, northwest Arizona and southeast
California...For the 12Z Forecast Package...South-southeasterly
breezes this afternoon across most of the area, with gusts up to 20
knots. The exception to this is the Barstow area where winds turn
easterly this afternoon before returning to the west. Gusts around
25 knots expected with the westerly push this evening. VFR
conditions under mostly clear skies across the region, with just a
few mid-level and high clouds over the southern Great Basin.
&&

.SPOTTER INFORMATION STATEMENT...Spotters are encouraged to report
any significant weather or impacts according to standard operating
procedures.
&&

$$

DISCUSSION...Morgan
AVIATION...Woods

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