Flash Flood Warning 8, NWS Reno, NV

664 
WGUS75 KREV 060207
FFSREV

Flash Flood Statement
National Weather Service Reno NV
707 PM PDT Fri Aug 5 2022

NVC031-060217-
/O.EXP.KREV.FF.W.0008.000000T0000Z-220806T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washoe NV-
707 PM PDT Fri Aug 5 2022

...FLASH FLOOD WARNING FOR THE POODLE BURN SCAR WILL EXPIRE AT 715 
PM PDT THIS EVENING FOR CENTRAL WASHOE COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 4095 11958 4095 11949 4080 11944 4072 11941
      4064 11947 4066 11953 4070 11951 4075 11952
      4078 11957 4081 11963 4083 11968 4085 11968
      4088 11964 4091 11961 4093 11961

$$

DJ

Area Forecast Discussion
National Weather Service Reno NV
217 PM PDT Fri Aug 5 2022

.SYNOPSIS...

Showers and cloud cover early this afternoon will give way to some
brief clearing, that will be followed by a later round of showers
and storms. This weekend will be relatively drier, but a return to
monsoonal flow is in store for early next week. Looking into the
long range, the active pattern stays around as the monsoon moisture
remains a presence.

&&

.SHORT TERM...Friday Afternoon through Saturday Night...

As of 8:30 this morning, Reno Airport measured 1.52 inches of rain
(and counting) since the beginning of August 2022. With the record
of 1.65 inches in 1965, we stand a decent chance of seeing the
wettest August of record! Let's see if we can keep adding to the
totals, although we would prefer this gentle rain over the heavy
showers that caused issues for so many already this week.

Plentiful monsoonal moisture continues to stream north from the Gulf
of California, feeding into the Great Basin. GFS/ECMWF model
soundings showing PWAT values of around 1 inch and dewpoints in
current observations ranging in the upper 50s to low 60s across the
region indicate ample atmospheric water content to support the cloud
cover and shower activity ongoing this afternoon. An MCV spinning
over southern NV will migrate toward the north along the Sierra
Front, providing some lift that will help to enhance the shower
activity. Once diurnal warming assists in destabilizing the
atmosphere this afternoon we will see an increase in showers and
storms, but only for areas where clearing allows for warming. Other
areas will be stuck under stratiform clouds with light rain showers,
especially along US-395.

Convective activity looks to hold off until after 3-4 pm for W
Nevada and the Sierra Front, later than in days previous. Radar
shows storms starting to pop along and north of I-80, while
stratiform showers remain along the Sierra Crest this afternoon.
Showers will gradually exit and dwindle to the east into overnight
Friday.

-HRICH

.LONG TERM...Sunday onward...

Cumulus buildups and isolated thunderstorms are possible on Sunday,
but thunderstorm activity looks to be limited due to a capping
inversion inhibiting vertical instability. Any storms that do
develop will most likely stay confined to Mono/Mineral counties. As
a shortwave trough to our north exits the region, high pressure over
the Four Corners region will quickly build back in on Sunday. A
closed low sitting off the northern California coast will also begin
lifting along the Pacific coast on Sunday. This pattern will allow
monsoonal southerly flow to redevelop over our region by Monday. A
gradual monsoonal push will bring an uptick in PWATs early next
week, with values between 0.7-0.9". With ample moisture availability
and instability from surface heating, thunderstorm chances look to
increase in coverage across Mono/Mineral counties.

Models diverge on where monsoonal moisture will go beyond Monday, as
timing of the moisture push and positioning of storms highly depends
on the location of the closed low during this period. However,
Tuesday looks to hold the greatest chances for widespread shower and
thunderstorm coverage, notably for areas south of I-80. Coverage
shifts westward on Wednesday as the low pressure system introduces
dry southwest flow over the region.  Thursday and Friday hold the
most uncertainty, though showers and thunderstorms are not out of
the equation. Any thunderstorms that develop this week may produce
frequent lightning, locally heavy rains, and gusty outflow winds up
to 45 mph.

Keep an eye on the forecast and have a way to receive weather
updates if you have any outdoor plans next week! -Whitlam

&&

.AVIATION...

A robust cloud deck residing over much of Nevada will persist as
monsoonal moisture continues to stream in. Rain showers will persist
for the early afternoon for all terminals, with some clearing ahead
of yet another round of storms that fire late afternoon. CIGS may be
lower in the vicinity of showers and storms, and with ample moisture
could even affect slantwise VIS. Icing is possible for FL150-270
over Nevada. Showers and storms could also present LLWS and
turbulence concerns, potential for gusty outflows with blowing dust.
Storms could contain small hail, heavy rain and frequent lightning
and may produce MVFR conditions.

This weekend, our chances of precipitation are lower (10-15%) giving
some areas a chance to dry out. -HRICH

&&

.REV Watches/Warnings/Advisories...
NV...Flood Watch until 11 PM PDT this evening NVZ001.

CA...Flood Watch until 11 PM PDT this evening CAZ073.

&&

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

Special Weather Statement
National Weather Service RENO NV
136 PM PDT Fri Aug 5 2022

CAZ070>072-NVZ002>005-060600-
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Greater Lake Tahoe Area-Greater Reno-
Carson City-Minden Area-
Western Nevada Basin and Range including Pyramid Lake-
Northern Washoe County-
Including the cities of Cedarville, Eagleville, Fort Bidwell,
Portola, Susanville, Westwood, Sierraville, Loyalton,
South Lake Tahoe, Tahoe City, Truckee, Markleeville, Stateline,
Glenbrook, Incline Village, Sparks, Verdi, Gardnerville,
Virginia City, Fernley, Fallon, Lovelock, Silver Springs, Nixon,
Imlay, Empire, and Gerlach
136 PM PDT Fri Aug 5 2022

...SHOWERS AND STRONG THUNDERSTORMS THIS AFTERNOON AND EVENING...

* LOCATIONS...

 - Showers and thunderstorms are developing as anticipated this
   afternoon across northeastern California, western Nevada, and
   the Sierra Nevada. Thunderstorm coverage will increase across
   these areas as the afternoon goes on.

* HAZARDS...

 - Thunderstorms will be capable of producing frequent cloud-to-
   ground lightning, heavy rainfall, localized flooding, small
   hail, and gusty winds in excess of 40 mph. Blowing dust will
   also be possible across areas of dry ground where wetting
   rainfall has not occurred this past week.

* PREPAREDNESS ACTIONS...

-  If outdoors, keep your eyes to the sky and be prepared to seek
   shelter inside a building if you see lightning or hear
   thunder.

-  Turn around, don't drown when encountering flooded roads. Most
   flood deaths occur in vehicles. Campers and hikers should
   avoid streams or creeks.

-  Residents living in or immediately downstream of burn areas
   should maintain awareness for potential flooding and debris
   flows.

-  If caught in dust, pull off the road and turn off all lights.
   Delay travel if possible.

http://weather.gov/reno