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

Date:  30-May-16 Local Time:  07:23 AM Meteorologist:  Branz
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Fair)    
A.M. Stability (F) = 11 Wind Speed (mph)  = 8
500 millibar height (decameters) = 582 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 0.45
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 13.8
Allocation Equation: = 4804
   
ARB REVISED Basinwide Allocation _________________________________________ = 2000
Revised Allocation _________________________________________ = 2000
District Yesterday's
24-Hr Avg
PM2.5
Yesterday's
PM2.5
(0-6 PST)
Reduction
Factor
Proration Final
Allocation
(Acres)
Avg PM2.5
(0-6 PST)
Conc Stn
Colusa 10 11 1 0.17 200 15 COL
Sutter 11 11 1 0.17 200 15 YUB
Butte 9 10 1 0.17 200 10 CIC-GRD
Yolo/Solano 15 17 1 0.15 200 13 DAV-WOO
Glenn 13 14 1 0.13 200 15 WLW
Sacramento 18 14 1 0.09 200 24 SAC
Yuba 11 11 1 0.07 200 15 YUB
Placer 11 11 1 0.05 200 15 ROS
Tehama 13 14 1 200 acres
unless reduced
by PM
200 15 WLW
Shasta 10 7 1 200 7 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 ***
High pressure will continue to dominate the weather pattern today. The main difference from Sunday will be an increase in northerly winds this afternoon. These winds will lead to afternoon temps hitting the mid-upper 90s, perhaps flirting with the century mark in some spots. AM stability is a bit stronger this morning, and PM levels have come up a bit as well. Dispersion will be less favorable today.

24hr Outlook
*** Permissive Burn Day***
High pressure will dominate the West Coast for most, if not all, of the work week. Even warmer temps are expected for Tuesday as the ridge peaks in strength over the region. The ridge will strengthen further for the latter half of the week, bringing another round of 100-degree temps to the North State. Overall...expect a week of poor dispersion and deteriorating air quality as a strong ridge dominates the weather pattern.
Mixing Height Discussion:
Valley: Mixing heights will reach 2500-3000 feet by afternoon.
Winds:
North Valley:North to northwesterly 8-14 mph.
Delta: West to northwesterly 8-12 mph.