UWFPS 2017 daily cold-air pool
forecast valid Thursday 02/02/2017 1:00 MST (1:00 pm local time)
Summary: The decay phase of the ongoing persistent cold-air pool continues in the Salt Lake Valley Thursday while pollutants continue to rise in Cache. Utah Valley appears to have mixed out. Complete mix-out is expected in all basins by Saturday afternoon. No major pollution episodes are on the horizon at this point after Sunday.
Current
weather synopsis and short-term forecast for Thursday 2 February:
A weakened and very shallow temperature inversion continues on day 7 (Thursday) of the cold-air pool. A weak weather system is also bringing light precipitation that is falling into the ongoing shallow polluted layer. Ceilometers show that the depth of the polluted layer as of noon Thursday is now only around 200 m in the Salt Lake Valley and 250 m in the Cache Valley.
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/
Friday 3 February
Mix-out in the southern Salt Lake Valley expected Friday morning. A push of polluted air back into the Salt Lake Valley from the Great Salt Lake possible Friday afternoon. Cache is expected to remain in a cold-air pool Friday at this time.
Saturday 4 February
80% chance of rain with up to .25" rainfall totals. 90% chance of complete mix-out of cold-air pool in Salt Lake Valley, 70% in Cache Valley.
A weakened and very shallow temperature inversion continues on day 7 (Thursday) of the cold-air pool. A weak weather system is also bringing light precipitation that is falling into the ongoing shallow polluted layer. Ceilometers show that the depth of the polluted layer as of noon Thursday is now only around 200 m in the Salt Lake Valley and 250 m in the Cache Valley.
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/
Friday 3 February
Mix-out in the southern Salt Lake Valley expected Friday morning. A push of polluted air back into the Salt Lake Valley from the Great Salt Lake possible Friday afternoon. Cache is expected to remain in a cold-air pool Friday at this time.
Saturday 4 February
80% chance of rain with up to .25" rainfall totals. 90% chance of complete mix-out of cold-air pool in Salt Lake Valley, 70% in Cache Valley.
Sunday 5 February:
Partly cloudy. Clean air expected all basins, although slight chance Cache remains polluted.
Monday 6 February:
Rain or rain/snow mix likely. Accumulations possible in Cache at this time, unlikely in Salt Lake/Utah.
Tuesday 7 February:
Looks like a break between storm systems at this point centered from Monday night through early afternoon Tuesday. Rain starting in late Tuesday afternoon/evening and continuing through Wed.
Wednesday 8 Feb.
Rain likely.
Thursday 9 Feb. -Fri 10 Feb
Weak inversion possible. Would only expect minor pollutant build-up given snow will have all been melted (except in Cache) and short duration.
Partly cloudy. Clean air expected all basins, although slight chance Cache remains polluted.
Monday 6 February:
Rain or rain/snow mix likely. Accumulations possible in Cache at this time, unlikely in Salt Lake/Utah.
Tuesday 7 February:
Looks like a break between storm systems at this point centered from Monday night through early afternoon Tuesday. Rain starting in late Tuesday afternoon/evening and continuing through Wed.
Wednesday 8 Feb.
Rain likely.
Thursday 9 Feb. -Fri 10 Feb
Weak inversion possible. Would only expect minor pollutant build-up given snow will have all been melted (except in Cache) and short duration.
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