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

Date:  3-Oct-20 Local Time:  09:15 AM Meteorologist:  MIms
Ag Burn Decision Above 3000 ft:  No Burn Day    
A.M. Stability (F) = 23 Wind Speed (mph)  = 4
500 millibar height (decameters) = 591 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 70.0
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 79 71 0 102 9 53 COL
Butte 69 62 0 133 9 65 CIC-GRD
Glenn 76 101 0 125 9 46 WLW
Placer 65 32 0 125 20 66 ROS
Sacramento 70 71 0 96 21 82 SAC
Sutter 88 59 0 133 11 96 YUB
Yolo/Solano 98 93 0 109 15 98 DAV-WOO
Yuba 88 59 0 133 11 96 YUB
Tehama 52 96 0 98 0 61 RBL
Shasta 54 74 0 99 23 77 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 ***

Not much change again as strong high pressure remains over the west coast with widespread smoke impacts. Maybe a few degrees of cooling, but the smoky and hazy skies will be the main weather consideration again.

24hr Outlook
*** No Burn Day ***
Should start to see more delta winds and a slow cool down as we move forward. This will translate to less smoke impacts in those areas closes to the delta, but smoke will be around well into the week. The real change still on track for late this week. Until then, expect more of the same since the smoke has no place to go.
Mixing Height Discussion:
Valley: Mixing heights near 3,000 feet.
Winds:
Valley:Variable and Light to 5 mph.
Delta: Light and Variable early to 5 mph, then W 3-8 mph
Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
30-Sep-20 0 0 0 0 0 0 0 0 0 0 0
01-Oct-20 0 0 0 0 0 0 0 0 0 0 0
2-Oct-20 0 0 0 0 0 0 0 0 0 0 0







Data Table
3-Oct-20 Date
09:15 AM Local Time
MIms Meteorologist
No Burn Day Ag Burn Decision Above 3000 ft
23 A.M. Stability (F)
4 Wind Speed (mph)
591 500 millibar height (decameters)
0 Average Rainfall (in)
0 Meteorological (MET) Factor
70.0 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
0 Allocation Equation:
0 ARB/CCO REVISED Basinwide Allocation