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

Date:  18-Oct-21 Local Time:  06:19 AM Meteorologist:  Gerber
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Good)    
A.M. Stability (°F) = -2 Wind Speed (mph)  = 5
500 millibar height (decameters) = 552 Average Rainfall (in) = 0.07
Meteorological (MET) Factor   = 0.65
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 3.7
Allocation Equation: = 9502
   
ARB/SMPC REVISED Basinwide Allocation _________________________________________ = 3000
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 7 11 1 13 0 3 COL
Butte 4 5 1 12 9 0 CIC-GRD
Glenn 6 10 1 18 0 1 WLW
Placer 8 10 1 17 0 5 ROS
Sacramento 6 7 1 10 14 3 SAC
Sutter 10 13 1 17 0 6 YUB
Yolo/Solano 6 7 1 12 14 4 DAV-WOO
Yuba 10 13 1 17 0 6 YUB
Tehama 12 12 1 17 1 0 RBL
Shasta 4 7 1 11 14 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:
*** Permissive Burn Day ***

Damp conditions this morning after last night frontal passage. Most valley locations picking up less than a tenth of an inch of rain. A few lingering showers are possible early this morning along the Eastern valley and foothills. Increasing sunshine today but remaining cool with temps in the 60s. Dispersion will remain good under a light Southerly flow.

24hr Outlook
*** Permissive Burn Day ***
Brief ridging through Tuesday afternoon before another trough brushes Northern California Tuesday night into Wednesday. This next system looks to push a littler further North than Sundays with lightly scattered precip once again the further South you go. However gusty southerly winds are expected. An unsettled weather pattern will remain in place through the end of the week into the upcoming weekend with some more substantial rain possible. Stay Tuned!

Mixing Height Discussion:
Valley: Mixing heights near 3000 feet.
Winds:
Valley: S/SE 5-10 mph
Delta: W/SW 10-15
Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
15-Oct-21 0 0 0 0 0 0 0 0 0 0 0
16-Oct-21 0 0 0 0 0 0 0 0 0 0 0
17-Oct-21 0 0 0 0 0 0 0 0 0 0 0







Data Table
18-Oct-21 Date
06:19 AM Local Time
Gerber Meteorologist
Permissive Burn Day (Good) Ag Burn Decision Above 3000 ft
-2 A.M. Stability (°F)
5 Wind Speed (mph)
552 500 millibar height (decameters)
0.07 Average Rainfall (in)
0.65 Meteorological (MET) Factor
3.7 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
9502 Allocation Equation:
3000 ARB/CCO REVISED Basinwide Allocation