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

Date:  7-Mar-21 Local Time:  07:18 AM Meteorologist:  Gerber
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Good)    
A.M. Stability (F) = 11 Wind Speed (mph)  = 8
500 millibar height (decameters) = 563 Average Rainfall (in) = 0.0
Meteorological (MET) Factor   = 0.45
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 7.0
Allocation Equation: = 9874
   
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 6 -1 1 0.17 200 5 COL
Sutter 6 1 1 0.17 200 10 YUB
Butte 3 3 1 0.17 200 6 CIC-GRD
Yolo/Solano 0 0 1 0.15 200 0 DAV-WOO
Glenn 3 3 1 0.13 200 4 WLW
Sacramento 3 2 1 0.09 200 5 SAC
Yuba 6 1 1 0.07 200 10 YUB
Placer 6 3 1 0.05 200 9 ROS
Tehama - - 1 200 acres
unless reduced
by PM
200 - RBL
Shasta 4 0 1 200 11 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:
*** WET Permissive Burn Day ***

Technically still a WET day from Friday night's system. However today will remain Sunny and mild with light N/NW flow. Dispersion will remain good.


24hr Outlook
*** WET Permissive Burn Day ***
Active weather expected for the beginning half of this week, as a deep closed low spins over the Pacific and works it's way inland during Mon, Tue and Wed. Periods of light rain and scattered thunderstorms to begin Monday afternoon with the more persistent valley rains expected Tuesday. The second half of the week dries out as a high pressure ridge follows. Dispersion remains favorable throughout the period. Stay Tuned!
Mixing Height Discussion:
Valley: Mixing heights near 2,500-3,000 feet+.
Winds:
Valley:N/NW 5-10 mph
Delta: W/NW 5-10 mph