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California, Lassen-Eastern Plumas-Eastern Sierra Counties

Special Statement

Statement as of 11:39 AM PST on December 11, 2017

Expires 9:00 AM EST on December 12, 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

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.


Weather Severe Map
Alaska - Areal Flood Advisory , Winter Weather Advisory , Winter Storm Warning , Record Report
Arkansas - Record Report
California - Fire Weather Warning , Special Statement , Record Report
Colorado - Public Information Statement , Public Information Statement
Connecticut - Winter Weather Advisory
Florida - Coastal Hazard Statement , Freeze Watch
Georgia - Wind Advisory , Lake Wind Advisory , Freeze Watch
Idaho - Dense Fog Advisory , Air Stagnation Advisory , Air Quality Alert
Illinois -
Indiana - Lakeshore Flood Advisory , Winter Weather Advisory , Winter Storm Warning , Special Statement
Iowa - Public Information Statement
Kansas - Public Information Statement , Public Information Statement
Kentucky - Special Statement
Louisiana - Storm Surge Warning, Tropical Storm Warning
Maine - Wind Advisory , Winter Weather Advisory , Winter Storm Warning , Public Information Statement
Maryland - Wind Chill Advisory, Winter Weather Advisory
Massachusetts - Winter Weather Advisory
Michigan - Lakeshore Flood Advisory , Wind Advisory , Winter Storm Warning , Winter Weather Advisory , Winter Storm Watch , Public Information Statement
Minnesota - Special Statement , Public Information Statement
Missouri -
Montana - High Wind Warning , Wind Advisory , Dense Fog Advisory
Nebraska - Public Information Statement
Nevada - Special Statement
New Hampshire - Winter Storm Warning , Winter Weather Advisory
New Mexico -
New York - Winter Weather Advisory , Winter Storm Warning , Lake Effect Snow Warning , Special Statement
North Carolina - Wind Advisory , Wind Advisory, Freeze Warning , Wind Chill Advisory , Winter Weather Advisory, Wind Chill Advisory , Wind Chill Advisory, Winter Weather Advisory
North Dakota - Special Statement
Ohio - Lake Effect Snow Warning , Winter Weather Advisory , Special Statement
Oregon - Freezing Fog Advisory, Air Stagnation Advisory , Air Stagnation Advisory, Freezing Fog Advisory , Dense Fog Advisory, Air Stagnation Advisory , Air Stagnation Advisory , Air Quality Alert
Pennsylvania - Winter Weather Advisory , Lake Effect Snow Warning , Special Statement
Rhode Island - Winter Weather Advisory
South Carolina - Lake Wind Advisory
South Dakota - High Wind Watch
Tennessee - Winter Weather Advisory , Winter Weather Advisory, Wind Chill Advisory , Special Statement
Texas - Tropical Storm Warning , Storm Surge Watch, Tropical Storm Warning
Utah - Record Report
Vermont - Winter Storm Warning , Winter Weather Advisory
Virginia - Wind Advisory , Wind Chill Advisory , Winter Weather Advisory, Wind Chill Advisory , Special Statement
Washington - Air Stagnation Advisory , Record Report
West Virginia - Wind Chill Advisory, Winter Weather Advisory , Wind Chill Advisory , Winter Weather Advisory , Winter Weather Advisory, Wind Chill Advisory , Special Statement
Wisconsin - Wind Advisory , Special Statement , Public Information Statement
- Gale Warning

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