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: Sunday, November 21, 2010       2:35 PM      Jim Little



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

    MONDAY
A cold weather pattern has set up for the Pacific Northwest.  In the upper atmosphere a strong ridge of high pressure has developed up in the eastern Pacific and the Gulf of Alaska with a cold trough extending from north-central Canada into southern California.  This leaves the Pacific Northwest in a cold northerly flow aloft.  There will be enough moisture for snow.  Lower elevations will see 2 to 5 inches by Monday evening, higher elevations generally 5-8.
Smoke dispersal conditions will be generally good with most areas seeing a westerly then southwesterly transport wind.
    EXTENDED OUTLOOK (TUESDAY - THURSDAY)
The upper disturbance that moves through Monday afternoon and evening will bring another round of snow to the area.  The snow will be tapering off on Tuesday as a drier flow moves over the region.  Smoke dispersal conditions will be fair to good.
For Wednesday and Thursday, the cold upper trough will move east and the ridge in the Pacific will begin to move over the area.  Upper flow will be northerly and dry for mostly sunny weather. Temperatures, however, will remain cool.  Cold nighttime temperatures will promote overnight inversions that will be slow to break and limit maximum mixing heights.  Thus smoke dispersal conditions will be marginal Wednesday and beyond.

2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height above 5000 ft throughout the day.



Transport wind WSW to W at 19 - 33 mph during the morning and afternoon.  Transport wind decreases to SW to W at 16 - 30 mph during the evening.



Surface wind WSW to W at 12 - 22 mph throughout the day.

Zone 633 - 638:

Mixing height above 5000 ft throughout the day.



Transport wind WSW to WNW at 15 - 29 mph during the morning and afternoon.  Transport wind decreases to SW to WSW at 14 - 28 mph during the evening.



Surface wind WSW to W at 12 - 22 mph.



OUTLOOK:



TUESDAY

In the west mixing height 2600 to 3600 ft during the morning rising to 3700 to 4700 ft during the afternoon.  In the east mixing height 3200 to 4200 ft throughout the day.  Transport wind WNW to NW at 11 - 21 mph.  Surface wind W to NW at 10 - 16 mph.



WEDNESDAY

Mixing height below 1000 ft during the morning rising to 2000 to 3000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



THURSDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2000 to 3000 ft during the afternoon.  Transport wind S to SW at 4 - 8 mph.  Surface wind S to SW at 4 - 8 mph.



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, November 22, 2010.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the SW through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the SW through NW in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



Zone 633 - 638:

Avoid ignitions within 10 miles to the SW through WNW of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



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

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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