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

Date:  20-Nov-18 Local Time:  07:22 AM Meteorologist:  Branz
Ag Burn Decision Above 3000 ft:  Marginal    
A.M. Stability (F) = 24 Wind Speed (mph)  = 4
500 millibar height (decameters) = 570 Average Rainfall (in) = 0.0
Meteorological (MET) Factor   = 0
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 40.4
Allocation Equation: = 0
   
ARB/SMPC REVISED Basinwide Allocation _________________________________________ = 0
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 36 55 0.8 65 5 27 COL
Butte 68 99 0 116 0 69 CIC-GRD
Glenn 26 40 1 48 2 17 WLW
Placer 39 41 1 54 13 13 ROS
Sacramento 94 114 0 138 0 59 SAC
Sutter 77 0 0 99 14 82 YUB
Yolo/Solano 61 48 0 123 17 41 DAV-WOO
Yuba 77 0 0 99 14 82 YUB
Tehama - - 1 - - - RBL
Shasta 32 41 1 47 1 26 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:
*** NO Burn Day ***
Little change is expected today as high pressure slowly pushes east today in response to a weak trough over Southern California. Strong stability is present once again in the Valley, trapping smoke from the Camp Fire below the inversion. Winds will continue to be light and variable until late afternoon when they should become light southerly, but just like yesterday, not enough to provide much mixing.

24hr Outlook
*** NO Burn Day ***
A rather abrupt pattern change is still on course for Wednesday and Thursday, as a Pacific trough pushes the persistent high pressure ridge out of the area. Expect southerly winds to pick up overnight and increase during the day on Wednesday, with rain moving in early in the north and spreading south and east by the afternoon. After a brief break on Thursday morning, another trough following for Thursday night and Friday will bring wind and rain to the North State before weak high pressure returns for the weekend.
Mixing Height Discussion:
Valley: Mixing heights will reach 1,000 ft by afternoon.
Winds:
Valley: Light and variable 3-6 mph, trending southerly late.
Delta: Light and variable 3-6 mph, trending south to southwesterly late.

Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
17-Nov-18 0 0 0 0 0 0 0 0 0 0 0
18-Nov-18 0 0 0 0 0 0 0 0 0 0 0
19-Nov-18 0 0 0 0 0 0 0 0 0 0 0







Data Table
20-Nov-18 Date
07:22 AM Local Time
Branz Meteorologist
Marginal Ag Burn Decision Above 3000 ft
24 A.M. Stability (F)
4 Wind Speed (mph)
570 500 millibar height (decameters)
0.0 Average Rainfall (in)
0 Meteorological (MET) Factor
40.4 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
0 Allocation Equation:
0 ARB/CCO REVISED Basinwide Allocation