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

Date:  20-Jan-19 Local Time:  07:23 AM Meteorologist:  Liu
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Good)    
A.M. Stability (F) = -5 Wind Speed (mph)  = 10
500 millibar height (decameters) = 566 Average Rainfall (in) = 0.3
Meteorological (MET) Factor   = 0.9
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 9.0
Allocation Equation: = 8933
   
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 4 3 1 0.17 200 10 COL
Sutter 10 9 1 0.17 200 9 YUB
Butte 6 5 1 0.17 200 9 CIC-GRD
Yolo/Solano 7 6 1 0.15 200 10 DAV-WOO
Glenn 5 3 1 0.13 200 7 WLW
Sacramento 8 6 1 0.09 200 7 SAC
Yuba 10 9 1 0.07 200 9 YUB
Placer 6 4 1 0.05 200 6 ROS
Tehama - - 1 200 acres
unless reduced
by PM
200 - RBL
Shasta 17 22 1 200 17 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 Day***
Today is another wet burning day. A upper-level trough is moving through California and will bring gusty southerly transport winds as well as rain to the Valley and snow over the mountain area. The dispersion will be great.


24hr Outlook
*** Wet Day ***
Tomorrow will continue to be a wet burning condition due to the rain from the past few systems. A upper ridge will start to develop on Monday and will stay throughout the week. Expect dry weather with northerly transport winds and possible morning frog and frost in the Valley.
Mixing Height Discussion:
Valley: Mixing heights will reach 500-1500 feet by afternoon.
Winds:
Valley: S 10-20 mph with gusts 25-30 mph.
Delta: S 10-20 mph.