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wwus75 kboi 181953

urgent - weather message
national weather service boise id
1253 pm mst tue jan 18 2022

western magic valley-harney county-
1253 pm mst tue jan 18 2022 /1153 am pst tue jan 18 2022/

...air stagnation advisory remains in effect until 11 am mst
/10 am pst/ friday...
...dense fog advisory will expire at 1 pm mst /noon pst/ this

* what...an extended period of stagnant air, with light winds 
  and little vertical mixing. fog has become less dense but
  will likely increase again tonight.

* where...western magic valley.

* when...for the air stagnation advisory, until 11 am mst friday.
  for the dense fog advisory, until 1 pm mst this afternoon. only
  marginal improvement is expected with the fog through the
  daylight hours. another dense fog advisory may be issued for 
  tonight and wednesday.

* impacts...periods of air stagnation can lead to the buildup of 
  pollutants near the surface.

precautionary/preparedness actions...

an air stagnation advisory concerns itself with meteorological
conditions only. for more information on air pollution in idaho, 
visit website www.deq.idaho.gov. for oregon, visit website 

if possible, reduce or eliminate activities that contribute to
air pollution, such as outdoor burning, and the use of
residential wood burning devices.  reduce vehicle trips and
vehicle idling as much as possible.


wwus75 kboi 201116

urgent - weather message
national weather service boise id
416 am mst thu jan 20 2022

west central mountains-lower treasure valley id-boise mountains-
upper treasure valley-western magic valley-camas prairie-
upper weiser river-harney county-baker county-malheur county-
oregon lower treasure valley-
416 am mst thu jan 20 2022 /316 am pst thu jan 20 2022/

...air stagnation advisory is cancelled...

an incoming system from the northwest this morning will increase 
mixing heights, and breezy winds from the northwest should scour 
out most of the stratus and haze this morning.


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