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

Date:  24-Jun-16 Local Time:  08:03 AM Meteorologist:  Gerber
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (FAIR)    
A.M. Stability (F) = 11 Wind Speed (mph)  = 15
500 millibar height (decameters) = 583 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0.65
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 5.8
Allocation Equation: = 6526
   
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 9 11 1 0.17 200 6 COL
Sutter 10 13 1 0.17 200 5 YUB
Butte 11 12 1 0.17 200 8 CIC-GRD
Yolo/Solano 11 15 1 0.15 200 7 DAV-WOO
Glenn 10 11 1 0.13 200 6 WLW
Sacramento 4 6 1 0.09 200 2 SAC
Yuba 10 13 1 0.07 200 5 YUB
Placer 10 11 1 0.05 200 7 ROS
Tehama 10 11 1 200 acres
unless reduced
by PM
200 6 WLW
Shasta 9 3 1 200 0 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:
*** RESTRICTED FIELD DAY ***
Winds will be shifting this morning out of the N/NW and remain active through this evening as high pressure begins to expand overhead.

24hr Outlook
*** Permissive Burn Day ***
High pressure strengthening this weekend and into early next week will result in some AQ and dispersion concerns Sunday through Tuesday which is when the region is expected to see the hottest temps and lightest winds.
Mixing Height Discussion:
Valley: Mixing heights will reach 2500-3,000 feet by afternoon.
Winds:
North/West Valley: This morning N/NW 3-6 mph, increasing 10-20mph.
South/East Valley:S/SW 3-6 mph early, shifting N/NW 10-15 mph.
Delta: S/SW 5-10 mph, shifting W/NW 10-15 mph