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

Date:  25-Oct-14 Local Time:  08:03 AM Meteorologist:  Lancero
Ag Burn Decision Above 3000 ft:  Permissive Burn Day (Good)    
A.M. Stability (F) = -7 Wind Speed (mph)  = 20
500 millibar height (decameters) = 564 Average Rainfall (in) = 0
Meteorological (MET) Factor   = 1
Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) = 7.2
Allocation Equation: = 10223
   
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 10 8 1 39 14 7 COL
Butte 10 10 1 29 17 3 CIC-GRD
Glenn 8 4 1 36 17 2 WLW
Placer 10 10 1 23 17 8 ROS
Sacramento 8 8 1 20 22 9 SAC
Sutter 11 8 1 75 18 9 YUB
Yolo/Solano 8 7 1 15 13 4 DAV-WOO
Yuba 11 8 1 75 18 9 YUB
Tehama 8 4 1 36 17 2 WLW
Shasta 12 12 1 26 9 17 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 ***
Cold frontal band moving through norCal this morning with rain spreading across the valley, along with strong southerly winds gusting 25-35mph as much as 40mph. Sutter Butte winds already reaching gust 52mph. Today expect rain in the morning hours with lingering possible Tstroms by aftn, temps in the mid-upper 60s, strong southerly winds 25-35mph stronger in the west valley 35-40mph and less in the south and east valley 15-25mph, and mixing hgts remaining at 2500ft. .

24 Hour + Outlook
*** PERMISSIVE BURN DAY ***
Front moved thru, bringing weak ridge and lighter winds and warmer temps in the low 70s, still possible Tstroms by aftn with unstable airmass.

Mixing Height Discussion:
Valley: Mixing heights near 2,500 by aftn.
Winds:
W Valley: Strong southerly winds 25-35mph gust 35-40mph.
S+E Valley: Lighter but still strong southerly winds 15-25mph gust 30-35mph.
Delta: Southerly 15-20mph

Complaints: Col Sut But Yol Gle Sac Yub Pla Teh Sha Total
22-Oct-14 0 0 0 0 0 0 0 0 0 0 0
23-Oct-14 0 0 0 0 0 0 0 0 0 0 0
24-Oct-14 0 0 0 0 0 0 0 0 0 0 0







Data Table
25-Oct-14 Date
08:03 AM Local Time
Lancero Meteorologist
Permissive Burn Day (Good) Ag Burn Decision Above 3000 ft
-7 A.M. Stability (F)
20 Wind Speed (mph)
564 500 millibar height (decameters)
0 Average Rainfall (in)
1 Meteorological (MET) Factor
7.2 Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5)
10223 Allocation Equation:
2000 ARB/CCO REVISED Basinwide Allocation