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

Date:  21-Nov-14 Local Time:  08:02 AM Meteorologist:  Lancero
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Good)    
A.M. Stability (F) = -6 Wind Speed (mph)  = 5
500 millibar height (decameters) = 562 Average Rainfall (in) = 0.25
Meteorological (MET) Factor   = 0.65
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 11.8
Allocation Equation: = 8475
   
ARB/CCO REVISED Basinwide Allocation _________________________________________ = 2000
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 11 16 1 22 0 10 COL
Butte 7 8 1 17 18 6 CIC-GRD
Glenn 5 5 1 10 22 4 WLW
Placer 20 27 1 31 8 15 ROS
Sacramento 15 18 1 31 22 6 SAC
Sutter 14 17 1 26 22 11 YUB
Yolo/Solano 13 15 1 26 23 18 DAV-WOO
Yuba 14 17 1 26 22 11 YUB
Tehama 5 5 1 10 22 4 WLW
Shasta 16 15 1 31 21 20 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***
Low clouds and fog with L+V winds in the valley from all the moisture from yesterday. Today, slight break in activity before the third system moves in late tonight bringing more rain for Sat. Expect fog to break by mid to late morning, L+V winds 3-5mph throughout the valley, then increase southerly 5-10mph by late aftn, delta winds L+V 3-5mph then SW 5-15mph by late, and low mixing hgts.

24 Hour + Outlook
*** Wet Day ***
Fcst on track: The third trough will move through late Friday and early Saturday, bringing more rain to the Valley. Good dispersion is expected through the weekend. The pattern will dry out a bit next week as high pressure tries to build in from the eastern Pacific.

Mixing Height Discussion:
Valley: Mixing heights will be limited to 1000-1500 feet due to clouds.
Winds:
Valley: L+V 3-5mph throughout the day, then southerly 5-10mph by late aftn.
Delta: L+V 3-5mph, then SW 5-15mph by mid late aftn.

Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
18-Nov-14 0 0 0 0 0 0 0 0 0 0 0
19-Nov-14 0 0 0 0 0 0 0 0 0 0 0
20-Nov-14 0 0 0 0 0 0 0 0 0 0 0







Data Table
21-Nov-14 Date
08:02 AM Local Time
Lancero Meteorologist
Permissive Burn Day (Good) Ag Burn Decision Above 3000 ft
-6 A.M. Stability (F)
5 Wind Speed (mph)
562 500 millibar height (decameters)
0.25 Average Rainfall (in)
0.65 Meteorological (MET) Factor
11.8 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
8475 Allocation Equation:
2000 ARB/CCO REVISED Basinwide Allocation