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

Date:  27-Sep-16 Local Time:  08:15 AM Meteorologist:  Sue
Ag Burn Decision Above 3000 ft:  Marginal Burn Day    
A.M. Stability (F) = 21 Wind Speed (mph)  = 5
500 millibar height (decameters) = 589 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0.15
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 9.1
Allocation Equation: = 3499
   
ARB/SMPC REVISED Basinwide Allocation _________________________________________ = 1500
District Yesterday's
24-Hr Avg
PM2.5
Yesterday's
PM2.5
(0-6 PST)
Reduction
Factor
Yesterday's
PM2.5
MAX
Hour of
Yesterday's
MAX
Avg PM2.5
(0-6 PST)
Conc Stn
Colusa 10 7 1 19 10 12 COL
Butte 11 8 1 27 6 9 CIC-GRD
Glenn 14 14 1 27 18 4 WLW
Placer 5 5 1 11 19 7 ROS
Sacramento 10 8 1 22 11 11 SAC
Sutter 14 19 1 33 23 11 YUB
Yolo/Solano 9 10 1 15 5 12 DAV-WOO
Yuba 14 19 1 33 23 11 YUB
Tehama 5 2 1 17 19 6 RBL
Shasta 8 1 1 29 8 5 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 ***
*** SMAQMD has issued a SPARE THE AIR ALERT, and the ozone forecast EXCEEDS 100 AQI. It is a No-Burn day for the SFONA affected districts counties and zones. ***
High pressure continues to affect the region with high stability, hot temperatures, light and variable winds and poor dispersion. Burning is not recommended.

24hr Outlook
*** Permissive Burn Day ***
Light onshore flow is expected to gradually return tomorrow, strengthening into the end of the week as a trough drops overhead from the Pacific NW. Improving mixing and air quality are expected to return to the Sacramento Valley tomorrow and beyond.
Mixing Height Discussion:
Valley: Mixing heights near 2,500 feet by afternoon.
Winds:
N/W Valley: N/NE 5-15 mph in the morning, L+V by afternoon.
S/E Valley: L/V 2-5 mph
Delta:L/V 2-5 mph
Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
24-Sep-16 0 0 0 0 0 0 0 0 0 0 0
25-Sep-16 0 0 0 0 0 0 0 0 0 0 0
26-Sep-16 0 0 0 0 0 0 0 0 0