Basinwide Ag-Burn Acreage Allocation - Sacramento Valley Air Basin
| Date: 16-May-21 | Local Time: 07:34 AM | Meteorologist: Gerber |
| Ag Burn Decision Above 3000 ft: Permissive Burn Day (Good) | |||
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| A.M. Stability (°F) = 3 | Wind Speed (mph) | = | 10 |
| 500 millibar height (decameters) = 567 | Average Rainfall (in) | = | 0 |
| Meteorological (MET) Factor | = | 0.75 | |
| Air Quality (AQ) Factor (Basinwide 00-06 PST Average PM2.5) | = | 7.6 | |
| Allocation Equation: | = | 11709 | |
| ARB REVISED Basinwide Allocation | _________________________________________ | = | 4000 |
| Revised Allocation | _________________________________________ | = | 4000 |
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| 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) |
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| Conc | Stn | |||||||||||||||||
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| Colusa | 12 | 4 | 1 | 0.17 | 540 | 1 | COL | |||||||||||
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| Sutter | 9 | 8 | 1 | 0.17 | 540 | 10 | YUB | |||||||||||
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| Butte | 11 | 8 | 1 | 0.17 | 540 | 9 | CIC-GRD | |||||||||||
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| Yolo/Solano | 9 | 8 | 1 | 0.15 | 500 | 9 | DAV-WOO | |||||||||||
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| Glenn | 11 | 10 | 1 | 0.13 | 460 | 12 | WLW | |||||||||||
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| Sacramento | 8 | 8 | 1 | 0.09 | 380 | 7 | SAC | |||||||||||
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| Yuba | 9 | 8 | 1 | 0.07 | 340 | 10 | YUB | |||||||||||
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| Placer | 11 | 12 | 1 | 0.05 | 300 | 11 | ROS | |||||||||||
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| Tehama | 9 | 5 | 1 | 200 acres unless reduced by PM |
200 | 6 | RBL | |||||||||||
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| Shasta | 7 | 5 | 1 | 200 | 5 | AND | ||||||||||||
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| 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%) |
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| ARB Comments | ||||||||||||||||||
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| Cautionary Comments: | ||||||||||||||||||
| *** Permissive Burn Day *** Our unseasonably cold upper low will slowly push south and east this today. Still remaining some 5-10 degrees cooler than normal. Good onshore flow up the valley will help to keep dispersion good. 24hr Outlook *** Permissive Burn *** Weak ridging will move through behind the low for Monday, but a stronger trough to the north will push closer to the region by mid-week, enhancing onshore flow and keeping temperatures below normal into next weekend. Dispersion will be good through the week. |
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| Mixing Height Discussion: | ||||||||||||||||||
| Valley: Mixing heights near 3,000 feet by afternoon. |
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| Winds: | ||||||||||||||||||
| Valley: SW to SE 5-15 mph. Delta: SW to W 10-20 mph. |
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