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

Date:  24-Nov-14 Local Time:  07:25 AM Meteorologist:  Mims
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Fair)    
A.M. Stability (F) = 16 Wind Speed (mph)  = 7
500 millibar height (decameters) = 575 Average Rainfall (in) = 0.00
Meteorological (MET) Factor   = 0.25
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 16.4
Allocation Equation: = 3646
   
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 8 8 1 35 21 8 COL
Butte 13 10 1 78 22 17 CIC-GRD
Glenn 5 5 1 19 6 4 WLW
Placer 14 16 1 30 20 11 ROS
Sacramento 14 5 0 58 21 47 SAC
Sutter 10 8 1 36 20 20 YUB
Yolo/Solano 9 13 1 38 0 6 DAV-WOO
Yuba 10 8 1 36 20 20 YUB
Tehama 5 5 1 19 6 4 WLW
Shasta 24 25 0.8 48 19 28 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***
Still wet as high pressure continues strengthening over California. The cool overnight temperatures, strong inversions and light winds have lead to elevated fine particulates levels in some areas. This is indicative of the amount of dispersion available today, not much. Waiting towards noon and keeping burns small would be prudent. Expect less clouds as the ridge periphery pushes north with afternoon temperatures staying close to normal.

24 Hour + Outlook
*** Wet Day ***
High pressure will dominate through Thanksgiving with mild, stagnant weather expected. Would not be surprised to see some restrictions as inversions strengthen and PM levels rise. The previously mentioned storm system is still on track for this weekend. So, we should start to see some improvement in dispersal conditions later in the week.

Mixing Height Discussion:
Valley: Mixing heights will be limited to around 800 feet.
Winds:
Valley: Light and variable to 7mph early, then Northwesterly 4-8mph.
Delta: Light and variable to 5mph early, Northwesterly 2-6mph.
Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
21-Nov-14 0 0 0 0 0 0 0 0 0 0 0
22-Nov-14 0 0 0 0 0 0 0 0 0 0 0
23-Nov-14 0 0 0 0 0 0 0 0 0 0 0







Data Table
24-Nov-14 Date
07:25 AM Local Time
Mims Meteorologist
Permissive Burn Day (Fair) Ag Burn Decision Above 3000 ft
16 A.M. Stability (F)
7 Wind Speed (mph)
575 500 millibar height (decameters)
0.00 Average Rainfall (in)
0.25 Meteorological (MET) Factor
16.4 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
3646 Allocation Equation:
2000 ARB/CCO REVISED Basinwide Allocation