River Flood Warning 27, NWS Reno, NV

554 
WGUS45 KREV 191825
FLWREV


Flood Warning
National Weather Service Reno NV
1125 AM PDT Mon Jun 19 2017

...Forecast flooding changed from Moderate to Major severity for the 
following rivers in Nevada...
  Walker River Near Mason affecting Lyon County

For the Mainstem Walker River...including Mason...
Minor flooding is occurring...with Moderate to Major flooding
forecast.


Prolonged very warm temperatures this week will continue to
accelerate snowmelt in the Sierra with rapid runoff persisting into
the west and east forks of the Walker River. As a result, flows into
and below the Mason-Yerrington area on the mainstem Walker River
will rise above previous peaks starting Monday. How much higher
depends on upstream reservoir management and when the reservoirs
fill. Based on the latest river data...moderate to major flooding by
later this week is currently forecast. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-220625-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.3.SM.170618T2141Z.170623T2100Z.000000T0000Z.UU/
1125 AM PDT Mon Jun 19 2017

...Forecast flooding increased from Moderate to Major severity...
The Flood Warning continues for 
 The Walker River Near Mason.
* until further notice.
* At 10:15 AM Monday the stage was 10.1 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Moderate to Major flooding is
  forecast.
* Forecast...The river will continue rising to near 11.8 feet by 
  early Friday afternoon. Additional rises may be possible 
  thereafter.
* Impact...At 11.8 feet...Moderate to Major flooding in the Mason
  Valley-Yerington area. Some portions of Yerington may flood if
  breaches develop and the river spreads east. Flooding of many
  secondary and some primary roads occurs. Structures adjacent to 
  the river in the flood plain may be damaged if not protected.
  Extensive flooding of farmland and pasture near the river flood. 
* This flood wave will continue downstream to the Weber Reservoir.
* Flood history...This crest compares to a previous crest of 11.6
  feet on July 11 1995.


&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

038 
WGUS85 KREV 202239
FLSREV
Flood Statement
National Weather Service Reno NV
339 PM PDT Tue Jun 20 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Prolonged very warm temperatures this week will continue to
accelerate snowmelt in the Sierra with rapid runoff persisting into
the west and east forks of the Walker River. As a result, flows into
and below the Mason-Yerrington area on the mainstem Walker River
will rise above previous peaks starting Monday. How much higher
depends on upstream reservoir management and when the reservoirs
fill. Based on the latest river data...moderate to major flooding by
later this week is currently forecast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-231039-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.3.SM.170618T2141Z.170625T0600Z.000000T0000Z.UU/
339 PM PDT Tue Jun 20 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At  3:15 PM Tuesday the stage was 10.5 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Moderate to Major flooding is
  forecast.
* Forecast...The river will continue rising to near 11.9 feet by late
  Saturday evening. Additional rises may be possible thereafter.
* Impact...At 11.9 feet...Moderate to Major flooding in the Mason
  Valley-Yerington area. Some portions of Yerington may flood if
  breaches develop and the river spreads east. Flooding of many
  secondary and some primary roads occurs. Structures adjacent to 
  the river in the flood plain may be damaged if not protected.
  Extensive flooding of farmland and pasture near the river flood. 
* This flood wave will continue downstream to the Weber Reservoir.
* Flood history...This crest compares to a previous crest of 11.6
  feet on July 11 1995.


&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

235 
WGUS85 KREV 241713
FLSREV
Flood Statement
National Weather Service Reno NV
1013 AM PDT Sat Jun 24 2017

...The Flood Warning continues for the following rivers in 
California...
 
  West Walker River Near Coleville affecting Mono County
  
...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Very warm temperatures into early next week will maintain increased
snowmelt in the Sierra with rapid runoff persisting in the upper
portions of the Walker River basin. 

Snowmelt will result in continued high flows on the West Walker
River. Peak flows will occur overnight into the early morning hours.

Increased releases from Bridgeport Reservoir will maintain high flows
on the East Walker River.

As a result...flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high through early next week. The
peak level depends on efficiency of continued upstream flood plain
attenuation...reservoir management and when the reservoirs fill.
Based on the latest river data...minor flooding is likely through
Mason/Yerington with moderate flooding below Yerington through the
Wabuska area. Major flooding is still a possibility below Yerington
to near Weber Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. 

&&

CAC051-271713-
/O.EXT.KREV.FL.W.0026.000000T0000Z-170629T0700Z/
/WWBC1.2.SM.170618T0300Z.170621T0830Z.170628T1300Z.NO/
1013 AM PDT Sat Jun 24 2017

The Flood Warning continues for
  The West Walker River Near Coleville.
* until late Wednesday night.
* At 9:30 AM Saturday the stage was 6.1 feet.
* Flood stage is 6.0 feet.
* Minor flooding is occurring and minor to moderate flooding is
  forecast to continue through mid-week.
* Forecast...The river will continue to peak each night...but
  the peaks will decrease each day through Tuesday. The river will
  fall below flood stage Wednesday morning and is not expected to
  peak above flood stage that night.
* Impact...At 6.5 feet...Moderate flooding of lowlands...pastures
  and some rural roads from the West Walker River Canyon to Topaz
  Lake...including Walker...Coleville and Topaz California. Flooding
  of structures is limited although some sandbagging necessary. In
  the West Walker River Canyon...flooding is possible along rural
  roads and in recreation areas.

&&

LAT...LON 3839 11947 3859 11953 3868 11954 3859 11941 3837 11945

$$

NVC019-271713-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170622T1745Z.000000T0000Z.UU/
1013 AM PDT Sat Jun 24 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 9:15 AM Saturday the stage was 10.8 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and forecast to continue.
* Forecast...The river will fluctuate between 10.5 feet and 10.8 feet
  through at least next week.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads flood. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs. Some minor 
  flooding of basements and yards in Mason.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

362 
WGUS85 KREV 262207
FLSREV
Flood Statement
National Weather Service Reno NV
307 PM PDT Mon Jun 26 2017

...The Flood Warning continues for the following rivers in 
California...
 
  West Walker River Near Coleville affecting Mono County

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Temperatures returning to near normal and depleting snow contribution
area will decrease headwater flows slowly through this week in the upper
portions of the Walker River basin. This will result in slowly
decreasing flows along the West Fork of the Walker River.
 
Increased releases from Bridgeport Reservoir will maintain high flows on
the East Walker River.

As a result, flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high through the week. This section
has likely reached peak levels, but additional rises are still possible
depending on efficiency of continued upstream flood plain attenuation,
reservoir management, and when the reservoirs fill. Based on the latest
river data, continued prolonged minor flooding is likely through
Mason/Yerington with moderate flooding below Yerington through the
Wabuska area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. 

&&

CAC051-282207-
/O.EXT.KREV.FL.W.0026.000000T0000Z-170701T0400Z/
/WWBC1.2.SM.170618T0300Z.170621T0830Z.170630T1000Z.NO/
307 PM PDT Mon Jun 26 2017

The Flood Warning continues for
  The West Walker River Near Coleville.
* until Friday evening.
* At  2:30 PM Monday the stage was 5.8 feet.
* Flood stage is 6.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage Monday evening and peak near 6.3
  feet early Tuesday morning. The peaks early Wednesday and Thursday
  mornings are forecast to be lower but still near or above flood
  stage. The river is forecast to stay below flood stage by early
  Friday morning.
* Impact...At 6.0 feet...Minor flooding of lowlands...pasture & rural
  roads in West Walker River Canyon and Antelope Valley...including
  Walker...Coleville and Topaz California.


&&

LAT...LON 3839 11947 3859 11953 3868 11954 3859 11941 3837 11945


$$

NVC019-282207-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170622T1745Z.000000T0000Z.UU/
307 PM PDT Mon Jun 26 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At  2:15 PM Monday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Forecast...The river is expected to begin slowly falling Tuesday
  morning but remain above flood stage into early July.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads flood. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs.  Some minor 
  flooding of basements and yards in Mason.
* Flood history...This stage compares to a previous crest of 10.8 feet
  on July 1 2011.


&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

531 
WGUS85 KREV 280051
FLSREV
Flood Statement
National Weather Service Reno NV
551 PM PDT Tue Jun 27 2017

...The Flood Warning continues for the following rivers in 
California...
 
  West Walker River Near Coleville affecting Mono County
...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Temperatures returning to near normal and depleting snow contribution
area will decrease headwater flows slowly this week in the upper
portions of the Walker River basin. This will result in slowly
decreasing flows along the West Fork of the Walker River.
 
Increased releases from Bridgeport Reservoir will maintain high flows on
the East Walker River. Increased releases from Topaz Lake will also continue the high flows on the West Walker River below Topaz Lake.

As a result, flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high through the week. Flows will remain high through Mason and Yerington with levels possible reaching the crest seen on June 22nd. Based on the latest river data, continued prolonged minor flooding is likely through Mason/Yerington with moderate flooding below Yerington through the Wabuska area. 

&&

CAC051-010051-
/O.EXT.KREV.FL.W.0026.000000T0000Z-170702T0900Z/
/WWBC1.2.SM.170618T0300Z.170621T0830Z.170701T1500Z.NO/
551 PM PDT Tue Jun 27 2017

The Flood Warning continues for
  The West Walker River Near Coleville.
* until late Saturday night.
* At  5:30 PM Tuesday the stage was 5.5 feet.
* Flood stage is 6.0 feet.
* Minor flooding is forecast.
* Forecast...Rise above flood stage by late Tuesday evening  and 
  continue to rise to near 6.2 feet by early Wednesday morning. More 
  peaks are expected overnight Wednesday...Thursday and Friday.
* Impact...At 6.0 feet...FLood stage.  Minor flooding of lowlands...
  pasture & rural roads in West Walker River Canyon and Antelope 
  Valley...including Walker...Coleville and Topaz California. 


&&

LAT...LON 3839 11947 3859 11953 3868 11954 3859 11941 3837 11945


$$

NVC019-010050-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170628T1600Z.000000T0000Z.UU/
551 PM PDT Tue Jun 27 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At  5:15 PM Tuesday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Forecast...The river will continue rising to near 10.9 feet by late
  Wednesday morning and remain steady into Friday.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads flood. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs.  Some minor 
  flooding of basements and yards in Mason. 


&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

765 
WGUS45 KREV 282147
FLWREV


Flood Warning
National Weather Service Reno NV
247 PM PDT Wed Jun 28 2017

...Forecast flooding changed from Minor to Moderate severity for the 
following rivers in Nevada...
  Walker River Near Mason affecting Lyon County

For the Mainstem Walker River...including Mason...
Minor flooding is occurring...with Moderate flooding forecast.
 
Increased releases from Bridgeport Reservoir will lead to minor to
moderate flooding along the East Walker River. Flows have decreased
somewhat with depleting snow contributing area and recent more
seasonal temperatures on the West Walker River, but still remain
just below flood stages. 

As a result, flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high through the week. Flows are
expected to remain near current levels until late this week when the
increased flows from the East Walker make their way into the Mason
Valley. At that time flows are expected to climb above earlier
crests to levels near moderate flood stage at Mason. Flows will also
increase at Wabuska and down to Weber Reservoir by the weekend and
into early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

Do not drive cars through flooded areas as rushing water 
can easily sweep a car away...

&&

NVC019-300347-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.2.SM.170618T2141Z.170702T2100Z.000000T0000Z.UU/
247 PM PDT Wed Jun 28 2017

...Forecast flooding increased from Minor to Moderate severity...
The Flood Warning continues for 
 The Walker River Near Mason.
* until further notice.
* At  2:15 PM Wednesday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads flood. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs.  Some minor 
  flooding of basements and yards in Mason. 

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

569 
WGUS85 KREV 290111
FLSREV
Flood Statement
National Weather Service Reno NV
611 PM PDT Wed Jun 28 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Increased releases from Bridgeport Reservoir will lead to moderate
flooding or greater along the East Walker River. Flows have decreased
somewhat with the decrease in snow covered area contributing to the
runoff and recent temperatures in a more seasonal range in the West
Walker River basin, but they remain just below flood stages. 

As a result, flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high through the week. Flows are
expected to remain near current levels until late this week when the
increased flows from the East Walker make their way into the Mason
Valley. At that time, flows are expected to climb above earlier
crests to levels above moderate flood stage at Mason. Flows will
also increase at Wabuska and downstream to Weber Reservoir by the
weekend and into early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-020111-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.2.SM.170618T2141Z.170630T2100Z.000000T0000Z.UU/
611 PM PDT Wed Jun 28 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 5:15 PM Wednesday the stage was 10.8 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and moderate flooding is forecast.
* Forecast...The river will continue rising to near 11.2 feet by 
  early Friday afternoon. Additional rises may be possible 
  thereafter.
* Impact...At 11.3 feet...Moderate flooding of lowlands, farm, 
  and pasture lands is expected throughout the Mason Valley-Yerington
  area. Some low structures adjacent to river begin to flood.
  Several secondary and some primary roads flood. 

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

505 
WGUS85 KREV 010215
FLSREV
Flood Statement
National Weather Service Reno NV
715 PM PDT Fri Jun 30 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Increased releases from Bridgeport Reservoir will lead to moderate
flooding or greater along the East Walker River. Flows have decreased
somewhat on the West Walker River due to a decrease in snow covered
area contributing to the runoff and recent temperatures in a more
seasonal range, but temperatures will increase again over the
weekend. 

As a result, flows into and below the Mason-Yerington area on the
mainstem Walker River will remain high into at least early next week.
Flows are expected to remain near current levels through Saturday
then begin increasing as the increased flows from the East Walker
River make their way into the Mason Valley. At that time, flows are
expected to climb above earlier crests to levels at or above moderate
flood stage at Mason. Flows will also increase at Wabuska and
downstream to Weber Reservoir by the weekend and into early next
week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-050215-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.2.SM.170618T2141Z.170704T1500Z.000000T0000Z.UU/
715 PM PDT Fri Jun 30 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 6:15 PM Friday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river at Mason will continue rising to near 11.0
  feet by Tuesday morning. Additional rises may be possible
  thereafter. Moderate to major flooding is likely below Wabuska.
* Impact...At 11.0 feet...Moderate flooding of lowlands, pasture,
  and farmland is likely adjacent to river throughout the Mason
  Valley-Yerington area. Several rural and some secondary public
  roads flood. Yards and basements of lowest homes adjacent to the
  river in Mason and Yerington may begin flooding. Damage is possible
  to some to irrigation structures and levees. 

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

219 
WGUS85 KREV 030026
FLSREV
Flood Statement
National Weather Service Reno NV
526 PM PDT Sun Jul 2 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Increased releases from Bridgeport Reservoir will continue
into the coming week. This will result in continued high flows
and moderate or greater flooding on the East Walker River. Flows 
have decreased on the West Walker River due to a decrease in snow
covered area contributing to the runoff, but increasing
temperatures through July 4th may cause renewed higher flows. 

As a result, flows into and below the Mason-Yerington area on the
Walker River will remain high through much of the coming week. Flows
are expected to increase slowly the next few days as the increased
flows from the East Walker River make their way into the Mason
Valley. Peak flows are expected to climb above earlier crests to
levels at or above moderate flood stage at Mason. Flows will also
increase at Wabuska and downstream to Weber Reservoir by the weekend
and into early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-060026-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.2.SM.170618T2141Z.170706T1500Z.000000T0000Z.UU/
526 PM PDT Sun Jul 2 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 4:15 PM Sunday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Moderate flooding is forecast.
* Forecast...The river will continue rising to near 11.2 feet by 
  Thursday morning. Additional rises may be possible thereafter.
* Impact...At 11.3 feet...Moderate flooding of lowlands, farm, and
  pasture lands is likely throughout the Mason Valley-Yerington area.
  Some low-lying structures adjacent to river may flood. Several
  secondary and some primary roads may be impacted by flood waters.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

010 
WGUS85 KREV 040257
FLSREV
Flood Statement
National Weather Service Reno NV
757 PM PDT Mon Jul 3 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Releases from Bridgeport Reservoir have been decreased slightly, but
are still very high and are expected to continue through at least the
rest of the week. This will result in continuing high flows and
minor flooding along the East Walker River. Flows on the West Walker
River have increased moderately with warming temperatures and are
expected to remain elevated, but below flood stage, through the rest
of the week.

As a result, flows into and below the Mason-Yerington area on the
Walker River will remain high through the week. Flows are expected to
increase slightly as increased flows from the West Walker arrive. The
highest flows are expected to be very near, or slightly in excess of,
earlier peaks and approach the moderate flood stage of 11.0 feet.
Flows will also increase slightly at Wabuska and downstream to Weber
Reservoir by the weekend and into early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-080257-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.2.SM.170618T2141Z.170707T1300Z.000000T0000Z.UU/
757 PM PDT Mon Jul 3 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 7:15 PM Monday the stage was 10.7 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Minor to Moderate flooding is
  forecast.
* Impact...At 11.0 feet...Moderate flooding of lowlands, pasture,
  and farmland adjacent to river is likely throughout the Mason
  Valley-Yerington area. Some low lying structures near the river
  may flood. Several secondary and some primary roads may be
  impacted by flood waters.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

992 
WGUS85 KREV 072038
FLSREV
Flood Statement
National Weather Service Reno NV
138 PM PDT Fri Jul 7 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Releases from Bridgeport Reservoir were decreased slightly on Monday 
the 3rd, but are still very high and are expected to continue into next
week. This will result in continuing high flows and minor flooding 
along the East Walker River. Flows on the West Walker River will remain
elevated, with high temperatures and remaining high elevation snowmelt.
The West Walker is below flood stage and expected to remain below flood
stage. On Friday, releases from Topaz Reservoir have been decreased
slightly.

Flows into and below the Mason-Yerington area on the Walker River will
remain high through at least next week with minor flooding continuing.
Flows are expected to remain near current levels into the weekend
before a very slow decrease starting next week. Flows from Wabuska and
downstream to Weber Reservoir are expected to remain fairly constant
before a very gradual decrease beginning mid to early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-090238-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.000000T0000Z.UU/
138 PM PDT Fri Jul 7 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 12:15 PM Friday the stage was 10.8 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads are flooded. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs.  Some minor 
  flooding of basements and yards in Mason. 

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

073 
WGUS85 KREV 072113
FLSREV
Flood Statement
National Weather Service Reno NV
213 PM PDT Fri Jul 7 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Releases from Bridgeport Reservoir were decreased slightly on Monday 
the 3rd, but are still very high and are expected to continue into next
week. This will result in continuing high flows and minor flooding 
along the East Walker River. Flows on the West Walker River will remain
elevated, with high temperatures and remaining high elevation snowmelt.
The West Walker is below flood stage and expected to remain below flood
stage. On Friday, releases from Topaz Reservoir have been decreased
slightly.

Flows into and below the Mason-Yerington area on the Walker River will
remain high through at least next week with minor flooding continuing.
Flows are expected to remain near current levels into the weekend
before a very slow decrease starting next week. Flows from Wabuska and
downstream to Weber Reservoir are expected to remain fairly constant
before a very gradual decrease beginning mid to early next week. 

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-122113-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.000000T0000Z.UU/
213 PM PDT Fri Jul 7 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 12:15 PM Friday the stage was 10.8 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and Minor flooding is forecast.
* Impact...At 10.8 feet...Minor flooding of lowlands...pasture and 
  farmland adjacent to the river throughout the Mason 
  Valley-Yerington area. Some rural roads are flooded. Preventative 
  sandbagging of low structures in Mason and Yerington may be 
  necessary as river rises...but little flooding occurs.  Some minor 
  flooding of basements and yards in Mason. 

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

991 
WGUS85 KREV 101046
FLSREV
Flood Statement
National Weather Service Reno NV
346 AM PDT Mon Jul 10 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Releases from Bridgeport Reservoir were decreased slightly last
week, but are still very high and are expected to continue through
this week. This will result in continuing high flows and minor
flooding along the East Walker River. Flows on the West Walker River
are decreasing as snowmelt slows, but will remain elevated.

Flows into and below the Mason-Yerington area on the Walker River
will remain high through the week with minor flooding continuing.
Flows from Wabuska and downstream to Weber Reservoir are expected to
remain high as well through the week.  

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-141046-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.000000T0000Z.UU/
346 AM PDT Mon Jul 10 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At 3:15 AM Monday the stage was 10.6 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and forecast to continue.
* Forecast...The river will remain near 10.6 feet through this week.
* Impact...At 10.5 feet...Minor flooding of lowlands, pasture,
  farmland, and some rural roads is likely in Mason Valley.
  Preventative sandbagging of lowest homes in Mason and Yerington
  may be necessary as the river rises, but little flooding occurs.
  There may be some minor flooding of yards and basements in Mason.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

446 
WGUS85 KREV 102245
FLSREV
Flood Statement
National Weather Service Reno NV
345 PM PDT Mon Jul 10 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Releases from Bridgeport Reservoir were decreased again on Monday but
remain elevated. This will result in continuing high flows and minor
flooding along the East Walker River this week. Flows on the West Walker
River are decreasing as snowmelt slows but will remain elevated this
week.

Flows into and below the Mason-Yerington area on the Walker River
will remain high through the week with minor flooding continuing.
Flows from Wabuska and downstream to Weber Reservoir are expected to
remain elevated through the week.  

Any changes to upstream reservoir management will result in changes
to the river forecasts.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases.

&&

NVC019-142245-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.000000T0000Z.UU/
345 PM PDT Mon Jul 10 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At  3:15 PM Monday the stage was 10.6 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and forecast to continue.
* Forecast...The river will remain around 10.6 feet into Tuesday
  evening then begin slowly falling to 10.3 feet by Thursday night and
  Friday.
* Impact...At 10.5 feet...Minor flooding of lowlands, pasture, farmland
  and some rural roads in Mason Valley. There may be some minor flooding
  of yards and basements in Mason.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

415 
WGUS85 KREV 121743
FLSREV
Flood Statement
National Weather Service Reno NV
1043 AM PDT Wed Jul 12 2017

...The Flood Warning continues for the following rivers in Nevada...

  Walker River Near Mason affecting Lyon County

Minor flooding continues to be possible along the East Walker River
through the weekend, with flows on the West Walker River remaining
elevated. Reservoir management and reductions in river input as high
elevation snowpack wanes is allowing the Walker River from
Mason-Yerington to Wabuska to fall or begin falling this week and for
the weekend. However, flows into and below the Mason-Yerington area will
remain high through the weekend with minor flooding continuing.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These river forecasts are based on forecast rainfall and temperature 
conditions at time of issuance. If actual conditions vary from these
forecasts...river conditions will vary accordingly. River forecasts
include current and planned reservoir releases. Any changes to upstream
reservoir management will result in changes to the river forecasts.

&&

NVC019-161743-
/O.CON.KREV.FL.W.0027.000000T0000Z-000000T0000Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.000000T0000Z.UU/
1043 AM PDT Wed Jul 12 2017

The Flood Warning continues for
  The Walker River Near Mason.
* until further notice.
* At  9:00 AM Wednesday the stage was 10.3 feet.
* Flood stage is 9.8 feet.
* Minor flooding is occurring and forecast to continue through
  at least Saturday.
* Forecast...The river is expected to fall to near flood stage by
  Saturday night.
* Impact...At 10.3 feet...Minor flooding of lowlands...pasture and 
  farmland in Mason Valley-Yerington area. Some isolated flooding of
  rural roads is possible.


&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

510 
WGUS85 KREV 141823
FLSREV
Flood Statement
National Weather Service Reno NV
1123 AM PDT Fri Jul 14 2017

...The Flood Warning is cancelled and replaced by a Flood Advisory
for the following rivers in Nevada...
 
  Walker River Near Mason affecting Lyon County

Flood waters have receded, and are no longer expected to pose a 
significant threat to life or property along the Walker River near
Mason. See the Flood Advisory statement for more details. 

&&

NVC019-141853-
/O.CAN.KREV.FL.W.0027.000000T0000Z-170714T1823Z/
/MASN2.1.SM.170618T2141Z.170706T0615Z.170714T0400Z.UU/
1123 AM PDT Fri Jul 14 2017

The Flood Warning is cancelled for
  The Walker River Near Mason.
* At 10:15 AM Friday the stage was 9.6 feet.
* Flood stage is 9.8 feet.
* Fell below flood stage at  9:00 PM Thursday.
* Forecast...The river will continue to fall to 9.3 feet by early 
  Saturday morning.

&&

LAT...LON 3881 11920 3917 11927 3919 11898 3912 11890 3885 11908


$$

Area Forecast Discussion
National Weather Service Reno NV
222 PM PDT Sun Jun 18 2017

.SYNOPSIS...
High pressure will bring much above average temperatures into next
week with records possible through Wednesday. The threat for
thunderstorms will increase into Monday and Tuesday. Isolated
storms are possible in the Sierra this afternoon with storms
spreading north to the Oregon border and western Nevada by
Monday. Snowmelt runoff will increase flows especially in the
Walker River basin and creeks in Mono County.

&&

.DISCUSSION...
Not much has changed in overall forecast philosophy the last 24
hours. The anomalous near record heat will continue and we still
expect a few thunderstorms this evening over Mono County with the
best threat of thunderstorms Monday. By midweek a drying trend is
expected, but the cooling for late in the week looks modest at
best. Record highs remain possible Monday through Wednesday with
cooler, but still above average temperatures into next weekend.

Plenty of moisture remains across the region with precip water of
3/4 inch or more, but the limiting factor for thunderstorms
continues to be the warm temps aloft. If storms form over Mono
County this evening, they will be isolated in nature, slow moving
and produce brief heavy rains. Still, given the stability I would
not be surprised if nothing formed other than some buildups.

Monday is looking much more likely for convection with slightly
cooler temps aloft and surface temps warming. The moisture in
place will remain as low level flow remains very light. Expect
most areas to see isolated convection with some increase in
coverage from Mono County through the Sierra Front. The idea is
that a weak zephyr will form (or outflow from earlier Sierra
convection) and set up a boundary for more organized and
widespread convection. The biggest threats will be brief heavy
rains and gusty winds. While the storms are expected to be wet,
there are still fire weather concerns, see the Fire Weather
segment below.

Tuesday the flow becomes more southwest aloft which will begin to
scour out the moisture. Isolated storms remain possible south of
I-80 and also downstream of Lassen Peak in WSW flow aloft.
Wednesday looks to be mostly dry, but there is a weakness in the
ridge which is forecast to drop just west of Mono County. Added
the threat of thunderstorms for Mono and western Mineral counties
Wednesday.

The upper high finally retreats south late in the week as low
pressure moves into the Pacific Northwest. However, these waves
will remain well north and only flatten the ridge a bit. The GFS
is now in good agreement with the EC in keeping a stronger ridge.
Highs into the 90s are still expected in Western NV and 80s in
the Sierra into next weekend. Winds will remain somewhat light
aloft with a SW component, while at the surface prevailing winds
from the north to east are anticipated. These surface winds could
shift to a weak zephyr by late afternoon as the temps in the
Sacramento Valley cool, but it remains hot in West Central Nevada.
Wallmann

&&

.AVIATION...
Mainly VFR into Monday with light winds. The main threat is
thunderstorms which will be isolated near KMMH this evening, but
potentially affect all terminals Monday. The biggest threat from
the storms will be gusty outflow winds to 40 kts along with
lightning, brief heavy rain and small hail.

Fewer thunderstorms Tuesday, but a return to more typical
afternoon W-SW winds with gusts 20-25 kts. Wallmann

&&

.FIRE WEATHER...

We will continue to include a headline for the increased
thunderstorm threat Monday afternoon in the Fire Weather Forecast.
The very warm temperatures will continue to dry out grassy and
finer brush fuels during the next several days across western NV. By
Monday, potential for thunderstorms increases near the Sierra, and
across portions of western NV mainly from the Sierra Front
eastward to near a Fernley-Hawthorne line. A secondary area
with an increased thunderstorm threat includes far northwest NV and
the Surprise Valley. Projected surface dew points in the 40s with PW
values at least 0.80 inch and slow cell movement will favor wet
thunderstorms. A few lightning-induced fire starts are possible, but
with this amount of moisture the fuels may be less receptive to
ignition, and rain associated with these storms will have a good
chance of ending any fires that might start.

For Tuesday, the thunderstorm threat shifts a bit farther east away
from the Reno-Tahoe areas, but continues across west central NV
southward to Mono County, and also across far northeast CA and
northwest NV. Moisture isn't expected to be as substantial (PW
values drop to near 0.60 inch with surface dew points dipping to the
upper 30s-lower 40s) and cell motion is likely to increase. However,
cell coverage is expected to be more isolated compared to Monday.
MJD

&&

.HYDROLOGY...
Snowmelt flows with the hot temperatures will continue to be a
concern for the Walker River Basin. At this time, the greatest
impact is expected to be on the West Walker in the Antelope Valley
where moderate flooding is expected. Farther downstream, the
impacts depend on reservoir management and if/when the reservoirs
reach capacity. The Mason Valley including Yerington remains in
the flood advisory with minor lowland flooding expected. The river
will rise higher than anything we have seen so far this spring.
Whether it is only a quarter foot higher, or something more
significant is unknown and will continue to be monitored.

Elsewhere, high flows will continue on the Mono County streams
draining the Sierra with minor flooding likely in some areas.
High flows will also continue on the Carson and Truckee basins,
but no flooding is expected. Wallmann

&&

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

&&

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

Special Weather Statement
National Weather Service Reno NV
419 PM PDT SUN JUN 18 2017

CAZ073-190015-
Mono CA-
419 PM PDT SUN JUN 18 2017

...SHOWERS AND THUNDERSTORMS ALONG HIGHWAY 395...

At 413 PM PDT, Doppler radar was tracking isolated showers and
thunderstorms along the eastern Sierra near the Highway 395 corridor
from Mammoth Lakes to Bridgeport. Storms were moving to the
northwest around 10 mph.

Half inch hail, locally heavy rain and lightning will all be
possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If on area lakes including Bridgeport Reservoir, get out of the
water and move indoors or inside a vehicle before storms approach.
If you can hear thunder, you are close enough to be struck by
lightning. Motorists should slow down as ponding of water and hail
on roadways can be dangerous.

&&

LAT...LON 3756 11895 3755 11897 3802 11931 3804 11931
      3809 11937 3832 11954 3842 11919 3766 11870
      3754 11892
TIME...MOT...LOC 2313Z 148DEG 32KT 3786 11899

WH