California Air Resources Board - Meteorology Section
Basinwide Ag-Burn Acreage Allocation - Sacramento Valley Air Basin

Date:  19-Aug-19 Local Time:  06:45 AM Meteorologist:  Mims
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Fair)    
A.M. Stability (°F) = 10 Wind Speed (mph)  = 7
500 millibar height (decameters) = 585 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0.45
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 4.9
Allocation Equation: = 6290
   
ARB REVISED Basinwide Allocation _________________________________________ = 2000
Revised Allocation _________________________________________ = 2000
District Yesterday's
24-Hr Avg
PM2.5
Yesterday's
PM2.5
(0-6 PST)
Reduction
Factor
Proration Final
Allocation
(Acres)
Avg PM2.5
(0-6 PST)
Conc Stn
Colusa 8 6 1 0.17 200 3 COL
Sutter 11 13 1 0.17 200 8 YUB
Butte 10 11 1 0.17 200 7 CIC-GRD
Yolo/Solano 7 8 1 0.15 200 5 DAV-WOO
Glenn - - 1 0.13 200 - WLW
Sacramento 6 10 1 0.09 200 5 SAC
Yuba 11 13 1 0.07 200 8 YUB
Placer 6 8 1 0.05 200 6 ROS
Tehama 10 11 1 200 acres
unless reduced
by PM
200 6 RBL
Shasta 2 1 1 200 1 AND
When any district's 0-6 am average PM2.5 is >= 27 ug/m increasing concentrations will result in a reduction
in allocation acres (e.g. 27-28 : 20%, 29-30 : 40%, 31-32 : 60%, 33-34 : 80%)
ARB Comments
Cautionary Comments:
*** Permissive Burn Day ***
No big changes as low pressure and cooler temperatures remain. A little less wind and weaker inversions keeps decent dispersion overhead as we enjoy our last couple of day of this. Air quality will stay good as well.

24hr Outlook
*** Permissive Burn Day ***
One more day in the 80s then high pressure returns for the rest of the week. We will see decreasing dispersion as the week progresses, but still relatively good considering the summer we are having.
Mixing Height Discussion:
Valley: Mixing heights near 3000 feet.
Winds:
Valley: SW 5-10 mph, gusting to 15 mph
Delta: SW 10-20 mph.