SMI Northeast (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, December 6, 2010       7:45 AM      Jim Little



1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638



Upper air charts show a strong low pressure area about 900 miles west of Oregon.  This is producing a generally southwesterly flow aloft over the region.  This morning, however, a strong upper level disturbance is moving southwest to northeast in the broad scale flow producing shifting winds aloft and producing some precipitation.  The precip will mostly be snow although lower elevations should see rain or freezing rain before the air mass warms.  Mixing heights will be generally in the 3-4000 foot range in central Oregon, but lower (2-3000 feet) in the NE mountains.  Transport winds will be generally from the south to southwest.



2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height 3100 - 4100 ft during the morning and afternoon.  Mixing height lowers below 1000 ft during the evening.



Transport wind SSW to SW at 15 - 25 mph during the morning.  Transport wind decreases to SW to WSW at 10 - 22 mph during the afternoon and decreases to S to SW at 5 - 9 mph during the evening.



Surface wind SSW to SW at 8 - 12 mph throughout the day.

Zone 633 - 638:

Mixing height 1300 - 2300 ft during the morning.  Afternoon mixing height rises to 2000 - 3000 ft then lowers to 1500 - 2500 ft during the evening.



Transport wind S to SW at 8 - 12 mph throughout the day.



Surface wind S to SW at 5 - 9 mph during the morning.  Surface wind becomes light and variable and controlled by local terrain during the afternoon and evening.



3.  BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638

    The following considerations should be adhered to in addition to

    the requirements of the Oregon Smoke Management Plan. These

    Instructions are valid for burning conducted on Monday, December 6, 2010.

    ==================================================================



Zone 630 and 632:

Avoid ignitions within 15 miles to the S through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSE through WSW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2>30pm.



Zone 633 - 638:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the S through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the ESE through WSW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2:30pm.



    =========================================================

4.  SPECIAL NOTE:



    The smoke management forecaster is available at (503)-

    945-7401. Please call this number and not individual's

    numbers to discuss daily burning.  For large burns (over

    2000 tons) or burns extending over a considerable period,

    please request a special forecast.  Avoid calling before

    8 a.m. and between 2 to 3 p.m.



    This forecast is available on the Internet at:

      http://oregon.gov/ODF/FIRE/fire.shtml/#Smoke_Management



    Please ensure your units have been planned and accomplished by checking:

      http://oregon.gov/ODF/FIRE/SMP/dailysmoke.shtml

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