WWA Summary for All Issued by STO

Flash Flood Warning

Flash Flood Warning
NVC031-130200-
/O.NEW.KREV.FF.W.0006.260812T2303Z-260813T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Reno NV
403 PM PDT Wed Aug 12 2026

The National Weather Service in Reno has issued a

* Flash Flood Warning for...
  South Central Washoe County in western Nevada...

* Until 700 PM PDT.

* At 403 PM PDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is ongoing or
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  IMPACT...Flash flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Spanish Springs, Highway 445.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3979 11977 3979 11961 3975 11939 3962 11942
      3963 11981 3966 11981

FLASH FLOOD...RADAR INDICATED

$$

Gale Warning

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
206 PM PDT Wed Aug 12 2026

PZZ470-475-130515-
/O.CON.KEKA.GL.W.0027.000000T0000Z-260813T1600Z/
Waters from Pt. St. George to Cape Mendocino CA from 10 to 60 nm-
Waters from Cape Mendocino to Pt. Arena CA from 10 to 60 nm-
206 PM PDT Wed Aug 12 2026

...GALE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THURSDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas
  8 to 12 feet.

* WHERE...Waters from Pt. St. George to Cape Mendocino CA from
  10 to 60 nm and Waters from Cape Mendocino to Pt. Arena CA
  from 10 to 60 nm.

* WHEN...Until 9 AM PDT Thursday.

* IMPACTS...Strong winds will cause hazardous seas which could
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.

&&

$$

Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Sacramento CA
1104 AM PDT Wed Aug 12 2026

CAZ136-139-140000-
/O.UPG.KSTO.FW.A.0003.260813T1200Z-260814T0400Z/
/O.NEW.KSTO.FW.W.0004.260813T1200Z-260814T0400Z/
Sierra (El Dorado-Amador) Above 5000 ft-Sierra (Cal-
Tuo) Above 5000 ft-
1104 AM PDT Wed Aug 12 2026

...RED FLAG WARNING IN EFFECT FROM 5 AM TO 9 PM PDT THURSDAY FOR
THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR FIRE ZONES 136 AND
139...

The National Weather Service in Sacramento has issued a Red Flag
Warning for thunderstorms and strong outflow winds, which is in
effect from 5 AM to 9 PM PDT Thursday. The Fire Weather Watch is
no longer in effect.

* Affected Area...Fire Zone 136 Sierra (El Dorado-Amador) Above
  5000 ft and Fire Zone 139 Sierra (Cal-Tuo) Above 5000 ft.

* Thunderstorms...Isolated to scattered coverage of a mix of wet
  and dry thunderstorms expected. Lightning strikes may also
  occur outside of main precipitation cores.

* Outflow Winds...Gusty and erratic outflow winds could occur
  near any thunderstorm development.

* Impacts...Lightning can create new fire starts and may combine
  with strong outflow winds to cause a fire to rapidly grow in
  size and intensity.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

http://weather.gov/sacramento

Flood Advisory

Flood Advisory
National Weather Service Reno NV
405 PM PDT Wed Aug 12 2026

CAC003-NVC005-130200-
/O.NEW.KREV.FA.Y.0019.260812T2305Z-260813T0200Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alpine CA-Douglas NV-
405 PM PDT Wed Aug 12 2026

...FLOOD ADVISORY IN EFFECT UNTIL 7 PM PDT THIS EVENING...

* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Alpine County in northern California...
  Douglas County in western Nevada...

* WHEN...Until 700 PM PDT.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.

* ADDITIONAL DETAILS...
  - At 405 PM PDT, Doppler radar indicated heavy rain due to
    thunderstorms. Minor flooding is ongoing or expected to begin
    shortly in the advisory area. Between 0.8 and 1.1 inches of rain
    have fallen.
  - Some locations that will experience flooding include...
    Holbrook Junction and Monitor Pass.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

&&

LAT...LON 3871 11958 3869 11959 3868 11959 3868 11960
      3867 11960 3867 11961 3871 11971 3882 11958
      3880 11955 3877 11955 3874 11953 3870 11957


$$

Coastal Flood Advisory

Coastal Hazard Message
National Weather Service Eureka CA
131 PM PDT Wed Aug 12 2026

CAZ103-130800-
/O.NEW.KEKA.CF.Y.0019.260813T0600Z-260813T0800Z/
Northern Coastal Humboldt-
131 PM PDT Wed Aug 12 2026

...COASTAL FLOOD ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO
1 AM PDT THURSDAY...

* WHAT...High astronomical tides will cause minor flooding in low
  lying areas around Humboldt Bay. Up to one half foot of
  saltwater inundation above ground level is possible near
  shorelines and tidal waterways. Between 8.6 and 8.8 feet MLLW
  at the North Spit tide gauge is predicted.

* WHERE...Northern Coastal Humboldt County.

* WHEN...From 11 PM this evening to 1 AM PDT Thursday. High tide
  is at 12:10 AM at the Humboldt Bay North Spit tide gauge.
  Saltwater inundation will be possible 1 to 2 hours before and
  after high tide.

* IMPACTS...Flooding of low lying areas around Humboldt Bay
  including parks and roads with only isolated closures
  expected. Flooding will likely impact Jackson Ranch Road in
  the Arcata Bottoms and several roads in King Salmon.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Coastal Flood Advisory indicates that onshore winds and tides
will combine to generate flooding of low areas along the shore.

Feet Above Ground is locally defined as feet above the Highest
Astronomical Tide or HAT.

&&

$$

Coastal Hazard Message
National Weather Service San Francisco CA
1114 PM PDT Tue Aug 11 2026

CAZ006-506-508-529-530-130900-
/O.CON.KMTR.CF.Y.0008.000000T0000Z-260813T0900Z/
San Francisco-North Bay Interior Valleys-
San Francisco Bay Shoreline-Northern Monterey Bay-
Southern Monterey Bay and Big Sur Coast-
1114 PM PDT Tue Aug 11 2026

...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 2 AM PDT
THURSDAY...

* WHAT...Up to 1.4 ft of inundation above ground level is
  possible in low-lying areas near shorelines and tidal
  waterways.

* WHERE...Bayshore locations along the San Francisco Bay, San
  Pablo Bay, and Monterey Bay.

* WHEN...Until 2 AM PDT Thursday.

* IMPACTS...Flooding of lots, parks, and roads with only
  isolated road closures expected.

* ADDITIONAL DETAILS...At the San Francisco tidal gauge, high tide
  is expected to be 1.4 ft above normal (7.24 ft MLLW) at 11:49
  PM Wednesday 8/12. These predictions include both astronomical
  tides and roughly 3-6 inches of additional water mainly from a
  combination of thermal expansion and accumulated sea level rise
  since the tidal datum was established (1983- 2001). High tide
  varies up to 90 minutes earlier or later along the Pacific Coast
  and through the San Francisco Bay, respectively.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.

&&

$$

Small Craft Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
241 PM PDT Wed Aug 12 2026

PZZ570-130545-
/O.EXT.KMTR.SC.Y.0091.000000T0000Z-260813T2200Z/
Waters from Point Arena to Point Reyes 10-60 NM-
241 PM PDT Wed Aug 12 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 3 PM PDT THURSDAY...

* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt and
  seas 8 to 10 ft.

* WHERE...Waters from Point Arena to Point Reyes 10-60 NM.

* WHEN...Until 3 PM PDT Thursday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

URGENT - MARINE WEATHER MESSAGE
National Weather Service San Francisco Bay Area
241 PM PDT Wed Aug 12 2026

PZZ571-130400-
/O.CON.KMTR.SC.Y.0093.000000T0000Z-260813T0400Z/
Waters from Point Reyes to Pigeon Point 10-60 NM-
241 PM PDT Wed Aug 12 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 PM PDT THIS
EVENING...

* WHAT...Northwest winds 10 to 20 kt and seas 8 to 10 ft.

* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.

* WHEN...Until 9 PM PDT this evening.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

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

URGENT - MARINE WEATHER MESSAGE
National Weather Service Eureka CA
206 PM PDT Wed Aug 12 2026

PZZ450-455-130515-
/O.CON.KEKA.SC.Y.0074.000000T0000Z-260813T1600Z/
Coastal waters from Pt. St. George to Cape Mendocino CA out 10 nm-
Coastal waters from Cape Mendocino to Pt. Arena CA out 10 nm-
206 PM PDT Wed Aug 12 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT
THURSDAY...

* WHAT...Northwest winds 10 to 20 kt with gusts up to 40 kt and
  seas 7 to 10 feet.

* WHERE...Coastal waters from Pt. St. George to Cape Mendocino
  CA out 10 nm and Coastal waters from Cape Mendocino to Pt.
  Arena CA out 10 nm.

* WHEN...Until 9 AM PDT Thursday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

Flood Watch

Flood Watch
National Weather Service Reno NV
819 AM PDT Wed Aug 12 2026

CAZ073-NVZ001-131815-
/O.CON.KREV.FA.A.0004.260812T2100Z-260814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mono County-Mineral and Southern Lyon Counties-
Including the cities of Yerington, Smith Valley, Hawthorne, Mina,
Mammoth Lakes, Bridgeport, Coleville, Schurz, and Lee Vining
819 AM PDT Wed Aug 12 2026

...FLOOD WATCH REMAINS IN EFFECT FROM 2 PM PDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...Portions of east central California, including the
  following area, Mono County and western Nevada, including the
  following area, Mineral and Southern Lyon Counties.

* WHEN...From 2 PM PDT this afternoon through Thursday evening.

* IMPACTS...Excessive runoff may result in rock, mud, and debris
  flows in and near active fire perimeters, steep terrain, and poorly
  drained urban areas.

* ADDITIONAL DETAILS...
  - Heavy rain from thunderstorms primarily during the afteroon and
    evening hours today and Thursday.
  - http://www.weather.gov/safety/flood

$$

Flood Watch
National Weather Service Reno NV
819 AM PDT Wed Aug 12 2026

NVZ003-131815-
/O.CON.KREV.FA.A.0004.260812T2100Z-260814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Greater Reno-Carson City-Minden Area-
Including the cities of Virginia City, Verdi, Sparks, and
Gardnerville
819 AM PDT Wed Aug 12 2026

...FLOOD WATCH REMAINS IN EFFECT FROM 2 PM PDT THIS AFTERNOON THROUGH
THURSDAY EVENING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...A portion of western Nevada, including the following area,
  Greater Reno-Carson City-Minden Area. This includes the Bug and
  Stallion Fires.

* WHEN...From 2 PM PDT this afternoon through Thursday evening.

* IMPACTS...Excessive runoff may result in rock, mud, and debris
  flows in and near active fire perimeters, steep terrain, and poorly
  drained urban areas.

* ADDITIONAL DETAILS...
  - Heavy rain from thunderstorms primarily during the afteroon and
    evening hours today and Thursday.
  - http://www.weather.gov/safety/flood

$$

Flood Watch
National Weather Service Reno NV
819 AM PDT Wed Aug 12 2026

NVZ004-131815-
/O.EXB.KREV.FA.A.0004.260813T2000Z-260814T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Nevada Basin and Range including Pyramid Lake-
Including the cities of Imlay, Fernley, Nixon, Silver Springs,
Lovelock, and Fallon
819 AM PDT Wed Aug 12 2026

...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY
EVENING...

* WHAT...Flash flooding caused by excessive rainfall continues to be
  possible.

* WHERE...A portion of west central Nevada, including the following
  area, Western Nevada Basin and Range including Pyramid Lake.

* WHEN...From Thursday afternoon through Thursday evening.

* IMPACTS...Excessive runoff may result in rock, mud, and debris
  flows in and near active fire perimeters, steep terrain, and poorly
  drained urban areas.

* ADDITIONAL DETAILS...
  - Heavy rain from thunderstorms primarily during the afteroon and
    evening hours on Thursday.
  - http://www.weather.gov/safety/flood

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$

Fire Weather Watch

URGENT - FIRE WEATHER MESSAGE
National Weather Service Reno NV
1222 PM PDT Wed Aug 12 2026

CAZ272-132045-
/O.CON.KREV.FW.A.0007.260813T1200Z-260814T0400Z/
Greater Lake Tahoe and Truckee Area-
1222 PM PDT Wed Aug 12 2026

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
THURSDAY EVENING FOR THE POTENTIAL FOR NEW FIRE STARTS DUE TO
LIGHTNING...

* CHANGES...None.

* Affected Area...Fire Weather Zone 272 Greater Lake Tahoe and
  Truckee Area.

* Thunderstorms...Thunderstorm chances increase to 15 to 30
  percent for Thursday leading to lightning strikes on dry fuels
  especially early Thursday morning. Thunderstorms will produce
  hail and periods of moderate to heavy rainfall Thursday
  afternoon and evening.

* Outflow Winds...Up to 40 mph.

* Impacts...Lightning can create new fire starts and may combine
  with strong outflow winds to cause a fire to rapidly grow in
  size and intensity before first responders can contain them.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outdoor activities that can cause a spark near dry
vegetation, such as yard work, target shooting, or campfires.
Follow local fire restrictions. Check weather.gov/reno for
updates and livingwithfire.info for preparedness tips.

&&

$$

http://weather.gov/reno