Dust Storm Warning 1, NWS Reno, NV

222 
WWUS55 KREV 292028
DSWREV

Dust Storm Warning
National Weather Service Reno NV
125 PM PDT Mon Mar 29 2021

NVC001-019-021-292035-
/O.EXP.KREV.DS.W.0001.000000T0000Z-210329T2030Z/
Churchill NV-Mineral NV-Lyon NV-
125 PM PDT Mon Mar 29 2021

...THE DUST STORM WARNING FOR CENTRAL CHURCHILL...NORTHWESTERN
MINERAL AND SOUTHERN LYON COUNTIES WILL EXPIRE AT 130 PM PDT...

The dust storm which prompted the warning has weakened with 
visibilities beginning to rise for the area; therefore, the dust 
storm warning will be allowed to expire. However, blowing dust will 
continue this afternoon with areas of significantly reduced 
visibility still possible, especially in Mineral County. 

LAT...LON 3923 11828 3840 11844 3841 11890 3911 11897
      3976 11874 3994 11844 3993 11786
TIME...MOT...LOC 2025Z 233DEG 49KT 4142 11587 

$$

SS

Area Forecast Discussion
National Weather Service Reno NV
205 AM PDT Mon Mar 29 2021

.SYNOPSIS...

Breezy southwest winds will turn more northerly today as a dry
cold front passes. Cooler temperatures today and Tuesday will warm
back to well above normal Wednesday through Friday, as high
pressure builds over the region. Pacific low pressure will then
approach this weekend bringing increased winds, with cooler
weather and spring showers a good bet next week.

&&

.SHORT TERM (through Wednesday)...

* Dry cold front moving through the region early this morning.
  Numerous gusts 30-45 mph within the well mixed pre-frontal
  airmass. Notable overnight observations: Surprise Valley up to
  73 mph in what is likely a downslope event off the Warners, and
  a desiccating 47 mph gust at Lundy RAWS near Lee Vining with an
  RH of only 8%. What month is it again!?

* Based on latest high-res HRRR and NAM3 breezy conditions will
  continue through daybreak (mid-morning for the E Sierra), then
  with frontal passage northerly gusts will be more on the order
  of 20-35 mph into the afternoon then subside by sundown.
  Direction favors strong winds, rough water on Pyramid Lake
  today. Breezy N/NW winds will continue in the E Sierra well into
  the evening with post-frontal gradient favoring northerly wind
  channeling down the Chalfant Valley into Bishop vicinity. NAM3
  showing gusts 30-45 mph in these areas tonight which seems
  reasonable based on the pattern.

* Elsewhere tonight into Tuesday a fairly modest northeast wind
  setup is expected. This will mainly impact Sierra crest ski
  areas as 700mb flow increases to about 40 kts, peaking Tuesday
  morning. Some signs in the high-res guidance of stronger winds
  getting into the Tahoe basin this evening into Tuesday morning
  that would result in rough water.

* Aside from the Eastern Sierra, temperatures today and Tuesday
  will fall back to below normal in the dry post-frontal airmass.
  Lows the next couple nights will likely fall on the lower end of
  NBM guidance ranges with effective cooling in dry air. Even in
  urban areas temps into hard freeze territory are likely, affecting
  early irrigators. Wednesday guidance has us warming nicely to well
  above normal. Light easterly gradient may temper this some, until
  Thursday when we get more of a W/SW flow.

-Chris

.LONG TERM (Thursday onward)...

Few changes to the long term with the most significant change
warming temperatures a few degrees this weekend. Ensembles are in
good agreement with the moderate amplitude ridge late in the week
giving way to a deep trough along the coast by Sunday into early
next week. Ensembles are all in good agreement with this scenario.
The only differences are in the trough, as in timing, moisture
and depth.

With the ridge axis moving east Thursday and Friday it will be
quite warm with some afternoon southwest breezes. Highs will be a
good 10+ degrees above average with overnight lows closer to
average with a very dry airmass in place.

This weekend looks to be more of a transition to the trough as
almost all ensemble members are slowing the trough down and
digging it off the coast before it moves in. It will be breezy to
windy with southwest breezes. Temperatures will start to cool but
still look to remain a few degrees above average as better mixing
somewhat offsets the cooling aloft.

The trough likely moves in Monday and Tuesday. There are some
fairly wet solutions now as a few members drop the low far enough
south to pick up some subtropical moisture before moving in.
Still, the potential amounts vary significantly so it will take
some time to nail it down in the coming days. One thing we can say
with fairly high confidence is it will be below average for temps
with some showers and brisk winds. X

&&

.AVIATION...

* Cold front will move through the region this morning shifting
  breezy W/SW winds to more of a N direction. Rough wind shift
  timing based on latest HRRR: RNO 14z, CXP/MEV/NFL 16z, HTH 17z,
  but not much of a signal for TRK and TVL. Further south in the E
  Sierra around MMH breezy W/NW winds will persist much of the
  day. Strong gusty channeled N winds will impact the Chalfant
  Valley into BIH vicinity this evening.

* Impacts will include low level wind shear, increased turbulence,
  and mountain wave activity ahead of the front this morning.
  Post-frontal winds today into the evening will also see
  turbulence but could also bring some blowing dust to areas such
  as LOL, NFL, and HTH.

* Quieter weather Tuesday with more of E/NE flow. This will
  promote breezy periods at CXP/MEV. Some mountain waves over the
  Sierra crest and points westward. Possible low level wind shear
  for TRK, TVL early Tuesday morning.

-Chris

&&

.REV Watches/Warnings/Advisories...
NV...Lake Wind Advisory until 2 PM PDT this afternoon for Pyramid
     Lake in NVZ004.

     Lake Wind Advisory from 8 PM this evening to 5 PM PDT Tuesday
     for Lake Tahoe in NVZ002.

CA...Lake Wind Advisory from 8 PM this evening to 5 PM PDT Tuesday
     for Lake Tahoe in CAZ072.

&&

For more information from the National Weather Service visit...
http://weather.gov/reno