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Small Craft Advisory


URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN FRANCISCO CA
222 AM PST TUE DEC 12 2017


PZZ570-121830-
/O.CON.KMTR.SC.Y.0264.171213T0500Z-171213T1100Z/
POINT ARENA TO POINT REYES 10 TO 60 NM OFFSHORE-
222 AM PST TUE DEC 12 2017

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING
TO 3 AM PST WEDNESDAY...

* WINDS...NORTH 15 TO 25 KT.

* SEAS...AROUND 8 FEET.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 21 TO 33 KNOTS
AND/OR STEEP WAVES ARE EXPECTED TO PRODUCE HAZARDOUS WAVE
CONDITIONS TO SMALL CRAFT. INEXPERIENCED MARINERS...ESPECIALLY
THOSE OPERATING SMALLER VESSELS SHOULD AVOID NAVIGATING IN THESE
CONDITIONS.

&&

$$


Special Weather Statement


Special Weather Statement
National Weather Service RENO NV
1139 AM PST Mon Dec 11 2017

CAZ070>073-NVZ001>005-121400-
Surprise Valley California-Lassen-Eastern Plumas-
Eastern Sierra Counties-Greater Lake Tahoe Area-Mono County-
Mineral and Southern Lyon Counties-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, Bridgeport,
Coleville, Lee Vining, Mammoth Lakes, Hawthorne, Yerington,
Smith Valley, Mina, Schurz, Stateline, Glenbrook,
Incline Village, Sparks, Verdi, Gardnerville, Virginia City,
Fernley, Fallon, Lovelock, Silver Springs, Nixon, Imlay, Empire,
and Gerlach
1139 AM PST Mon Dec 11 2017

...Strong Inversions Continue This Week...

Persistent high pressure and lack of wind will keep valley
inversions in place through at least Thursday this week.

* The main impacts will be continued hazy conditions for lower
  elevation valleys in Western Nevada and eastern California.
  Local air quality districts will issue alerts as needed if
  pollution values become high enough.

* Morning temperatures will continue to be quite cold for lower
  elevation valleys including urban areas such as Reno. Tuesday
  and Wednesday mornings could see the coldest lows of the winter
  season so far with widespread teens, or even single digits
  possible in rural valleys. Mountain areas will remain
  considerably warmer.

* A weak storm passing to our north Friday should be just enough
  to erode the inversions, resulting in warmer temperatures and
  less haze buildup Friday into the weekend.

* Inversions are where cold air is trapped in valleys allowing
  smoke and pollutants to build up. They are fairly normal for
  our region in winter, and can remain in place for many days or
  even weeks especially with snowcover on the ground. Normally it
  takes a winter storm with increased winds to rid the region of
  these inversions.

$$
-Chris

http://weather.gov/reno

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Page last modified: June 2, 2009
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