UWFPS 2017 daily cold-air pool
forecast valid Friday 02/03/2017 12:00 MST (12:00 pm local time)
Summary: The decay phase of the ongoing persistent cold-air pool is nearly complete in the Salt Lake Valley with only a shallow 50-100 m deep polluted layer bleeding into the Valley from the Great Salt Lake. PM2.5 has continued to rise in Cache, reaching 100 micrograms/m3 Friday. Complete mix-out is expected in all basins by Saturday afternoon, although there is a small chance of the inversion continuing in Cache until Monday's storm. A series of storms may be followed by a ridge of high pressure Starting Saturday 12 February.
Current
weather synopsis and short-term forecast for Friday 3 February:
An extremely shallow polluted layer continues on day 8 (Thursday) of the cold-air pool over the Great Salt Lake. In the Cache Valley, a 200m deep pollution layer continues.
60% chance scattered rain showers after 4 pm. High 44 in Salt Lake Valley. High 35 in Cache.
See the following link for real-time ceilometer data https://asn.synopticdata.com/vis/time-height/
See the following link for Mesowest air quality data (including UDAQ monitoring sites)
http://meso2.chpc.utah.edu/aq/
Utah Division of air quality:
http://air.utah.gov/
Saturday 4 February
The last of the shallow polluted layer should be mixed out over the Great Salt Lake Friday night. There is a 30% chance Cache does not mix out with this system.
Most of the rain now looks to occur overnight Friday night, with scattered light snowers Saturday morning. 50% chance of rain with up to .25" rainfall totals (most Friday night). Some snow is possible in Cache is cold-pool does not mix out.
High: 45, Low: 32
Sunday 5 February:An extremely shallow polluted layer continues on day 8 (Thursday) of the cold-air pool over the Great Salt Lake. In the Cache Valley, a 200m deep pollution layer continues.
60% chance scattered rain showers after 4 pm. High 44 in Salt Lake Valley. High 35 in Cache.
See the following link for real-time ceilometer data https://asn.synopticdata.com/vis/time-height/
See the following link for Mesowest air quality data (including UDAQ monitoring sites)
http://meso2.chpc.utah.edu/aq/
Utah Division of air quality:
http://air.utah.gov/
Saturday 4 February
The last of the shallow polluted layer should be mixed out over the Great Salt Lake Friday night. There is a 30% chance Cache does not mix out with this system.
Most of the rain now looks to occur overnight Friday night, with scattered light snowers Saturday morning. 50% chance of rain with up to .25" rainfall totals (most Friday night). Some snow is possible in Cache is cold-pool does not mix out.
High: 45, Low: 32
Mostly cloudy. Clean air all basins, except slight chance Cache remains polluted if does not mix out Friday night/Saturday morning.
High: 47, Low: 35
Monday 6 February:
Rain with snow possible Valley benches. Clean air all basins.
Tuesday 7 February:
Looks like this may be a break period between storm systems at this point centered from Monday night through late afternoon Tuesday, will gain more confidence in this forecast by Saturday update.
Wednesday 8 February:
Rain likely.
Thursday 9 February:
Mostly sunny.
Friday 10 February:
Rain possible.
Saturday 11 February - Tuesday 14 February
Possible building in of ridge of high pressure.
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