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

Date:  26-Jun-16 Local Time:  07:35 AM Meteorologist:  Mims
Ag Burn Decision Above 3000 ft:  NO BURN DAY    
A.M. Stability (F) = 18 Wind Speed (mph)  = 4
500 millibar height (decameters) = 588 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0.1
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 8.8
Allocation Equation: = 4027
   
ARB REVISED Basinwide Allocation _________________________________________ = 2000
Revised Allocation _________________________________________ = 1800
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 5 6 1 0.17 200 8 COL
Sutter 7 6 1 0.17 200 9 YUB
Butte 9 8 1 0.17 200 8 CIC-GRD
Yolo/Solano 8 7 1 0.15 200 16 DAV-WOO
Glenn 7 6 1 0.13 200 7 WLW
Sacramento 5 10 1 0.09 0 5 SAC
Yuba 7 6 1 0.07 200 9 YUB
Placer 6 6 1 0.05 200 7 ROS
Tehama 7 6 1 200 acres
unless reduced
by PM
200 7 WLW
Shasta 5 5 1 200 6 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 ***
***The ozone forecast EXCEEDS 100 AQI. It is a No-Burn day only for the SFONA affected districts counties and zones** North wind are gone and so are the relatively cooler temperatures as strengthening high pressure will dominate regional conditions. Dispersion and air quality will remain poor with this system overhead with daytime highs reaching 102. However, this should be the coolest day until Thursday. Winds will be diurnally driven and light during this time.

24hr Outlook
*** Permissive Burn Day ***
No change is expected over the next several days with high pressure building through most of the week. The highlights will be the hot temperatures and poor air quality. Some cooling towards the later half of the week, but its summer and near 100 degree weather is the norm!
Mixing Height Discussion:
Valley: Mixing heights will reach 2000 feet by afternoon.
Winds:
Valley: Variable and Light to 6mph.
Delta: Southwesterly 5-15 mph