Area Forecast Discussion
Issued by NWS Las Vegas, NV

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS65 KVEF 242039
AFDVEF

Area Forecast Discussion
National Weather Service Las Vegas NV
139 PM PDT Sat Jun 24 2017

.SYNOPSIS...The prolonged heat wave over the region will finally
break early this coming week as a weak weather system moves across
the western states. This system will result in enhanced winds early
this week will increase the fire danger. Isolated thunderstorms
will remain possible over the Sierra through Sunday.
&&

.SHORT TERM...Today through Monday.

As expected, isolated to scattered clouds have developed today
along with a few showers/thunderstorms over the southern Sierra.
Little impact is expected from these showers outside of perhaps
some gusty winds. Elsewhere, temperatures as of this writing were
running 0-2 degrees higher than 24 hours ago, right on track with
the current forecast.

The forecast for Sunday also remains on track with most areas
seeing 2-3 degrees of cooling. The chances for showers/isolated
thunderstorms will remain over the southern Sierra through Sunday
as well. Finally, I did add a mention of smoke to the far east-
central portions of the forecast area (Mesquite/Colorado City) for
tonight to account for any smoke drift from the Brian Head fire in
Utah.

For Monday, the latest guidance has come in slightly cooler than
the previous forecast. As a result I lowered high temperatures
around a degree, taking Las Vegas down to 109. It`s going to be a
race to the finish for the record number of consecutive 110F+ days
in Las Vegas. The current record stands at 10 day and Monday
would be the consecutive 10th day of this heat wave. I made no
changes to the excessive heat product as 109 vs 110 will provide
little relief after such a stretch of hot conditions. Monday will
also see an uptick in wind speeds across the region, with
widespread gusts of 20-30 mph, and isolated gusts around 35 mph.

.LONG TERM...Tuesday through Friday.

By Tuesday, the ridge over the southwest will be suppressed a bit as
a shortwave moves across the northern Great Basin. Suppression of
the ridge will continue through much of the work week as a trough
over Alberta, Canada will deepen and drape over much of the western
CONUS. Temperatures will see a 3-5 degrees drop by Tue with highs
only a few degrees above normals by mid week. Breezy southwest winds
are expected each afternoon with wind speeds 10 to 20 mph with gusts
up to 25 mph. Wednesday afternoon, both the GFS and ECMWF are
showing a tight gradient over much of central Mohave County. This
will cause some gusty southwest winds up to 30 mph Wed afternoon.
Otherwise, dry and mostly clear conditions through the work week.
&&

.FIRE WEATHER...The prolonged heat wave over the region will finally
break early this coming week as a weak weather system moves across
the western states. This system will result in enhanced winds early
this week which, when combined with dry and warm conditions, will
increase the threat of critical fire conditions. Winds look to peak
in most areas on Monday, with fairly widespread gusts of 20-30 mph,
and isolated gusts around 35 mph. Isolated thunderstorms will remain
possible over the Sierra through Sunday.
&&

.HYDROLOGY...Creeks, streams and rivers along the eastern Sierra
slopes of Inyo County as well as the Owens Valley will be flowing
high and fast into at least early next week. Specifically, Rock
Creek, Big Pine Creek and Independence Creek have seen a
significant rise in flows. Minor flooding could occur near creeks
as well as a few low water crossings on some roadways. Remember,
never drive through flooded roadways or around barricades. Also,
pastureland or farmland adjacent to creeks, streams or rivers
could experience areas of standing water.
&&

.CLIMATE...Near record to record high temperatures will be
possible today and Sunday. The current record of consecutive
days above 110 degrees in Las Vegas is 10 days (1961), and for 115
degrees, 4 days (2005).

Las Vegas, NV Climate

           Forecast High Temps (F)       Daily Record Max Temps (F)
SAT (6/24):  114   113 (1961)
SUN (6/25):  112                          115 (1970)

          Forecast low Temps (F)       Daily Record High Min Temps (F)
SUN (6/25):           88                           86 (1974)
&&

.AVIATION...For McCarran...Light southwest to west is expected
this evening with less than 8kts expected. Hot temperatures will
continue through Monday with afternoon highs at or above 110
degrees. Scattered high clouds will be observed today however VFR
conditions will prevail. Typical overnight trends are expected, with
winds coming back up again late Sunday morning out of the northeast,
but remaining below 10kts.

For the rest of southern Nevada, northwest Arizona and southeast
California...Isolated thunderstorms will be possible over the
southern Sierra this afternoon with brief gusty winds likely near
any storms. Gusty west winds 25-30 knots will develop across the
western Mojave Desert late this afternoon and evening. Hot
temperatures will continue across the Mojave Desert areas through
the weekend with afternoon highs at or above 110 degrees. Scattered
high clouds and VFR conditions expected.
&&

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

$$

SHORT TERM...Wolcott
LONG TERM....Kryston
AVIATION.....Allen

For more forecast information...see us on our webpage:

http://weather.gov/lasvegas or follow us on Facebook and Twitter


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.