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

Date:  21-Oct-14 Local Time:  07:25 AM Meteorologist:  Branz
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Fair)    
A.M. Stability (F) = 1 Wind Speed (mph)  = 10
500 millibar height (decameters) = 568 Average Rainfall (in) = 0.04
Meteorological (MET) Factor   = 0.8
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 5.1
Allocation Equation: = 8510
   
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 5 5 1 15 10 4 COL
Butte 7 8 1 18 14 3 CIC-GRD
Glenn 5 3 1 24 10 4 WLW
Placer 7 6 1 10 18 6 ROS
Sacramento 4 0 1 9 17 6 SAC
Sutter - - 1 - - - YUB
Yolo/Solano 5 4 1 10 9 5 DAV-WOO
Yuba - - 1 - - - YUB
Tehama 5 3 1 24 10 4 WLW
Shasta 18 20 1 41 14 11 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 ***
Winds will become northerly by afternoon as the trough that brought rain to the area yesterday moves east. Some areas received nearly a tenth of an inch of rain, but overall it was not enough to make today a wet day. North winds should remain below restricted criteria, and with low AM stability, dispersion looks good today.

24 Hour + Outlook
*** PERMISSIVE BURN DAY ***
Zonal flow will take hold through midweek, with fair skies and mild temperatures expected. A ridge will build northward by Wednesday, but a stronger trough over the eastern Pacific will prevent the ridge from building over the North State. Unsettled weather returns for late in the week as that trough moves into the region.

Mixing Height Discussion:
Valley: Mixing heights will reach 2500 feet by afternoon.
Winds:
Valley: North to northwesterly 8-12 mph.
Delta: North to northwesterly 10-15 mph.

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







Data Table
21-Oct-14 Date
07:25 AM Local Time
Branz Meteorologist
Permissive Burn Day (Fair) Ag Burn Decision Above 3000 ft
1 A.M. Stability (F)
10 Wind Speed (mph)
568 500 millibar height (decameters)
0.04 Average Rainfall (in)
0.8 Meteorological (MET) Factor
5.1 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
8510 Allocation Equation:
2000 ARB/CCO REVISED Basinwide Allocation