SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, November 2, 2009       2:35 PM      Jim Little

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

** Stable Pattern - Poor Smoke Dispersal Conditions Continue **

A weak pacific weather system moving through British Columbian and northwest Washington Monday and Monday evening will be well to the east of the area tomorrow.  This will allow the upper level ridge to strengthen for very stable conditions over the region.  Expect fair weather but low mixing heights, mostly southeasterly winds, and generally poor smoke dispersal conditions.

    OUTLOOK (WEDNESDAY-FRIDAY)

Wednesday is a transition day as the upper ridge axis shifts eastward.  Expect little improvement in smoke dispersal conditions, however.  Mixing heights should be near or below 2500 feet most areas.  Winds will be generally light south-southeast.  By Thursday an upper trough will be approaching as the upper ridge axis moves out of the northern Rockies and into the northern plains.  Winds aloft will be southerly and surface winds will pick up from the south.  A Pacific cold front will reach the coast late in the day and spread rain eastward into the region by Friday morning.  Mixing conditions will be much improved.  Friday expect cloudy, showery weather most areas with good smoke dispersal conditions and a generally southerly wind early, shifting to northwesterly later in the day.


2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height 1000 - 2000 ft during the morning.  Afternoon mixing height rises to 2000 - 3000 ft then lowers below 1000 ft during the evening.

Transport wind SE to SSW at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to SE to S at 8 - 12 mph during the evening.

Surface wind light and variable and controlled by local terrain.

Zone 633 - 638:
Mixing height 1100 - 2100 ft during the morning.  Afternoon mixing height rises to 2000 - 3000 ft then lowers to 1100 - 2100 ft during the evening.

Transport wind light and variable and controlled by local terrain.  Transport wind increases to ESE to SSE at 9 - 15 mph during the evening.

Surface wind light and variable and controlled by local terrain.  Surface wind increases to ESE to SSE at 5 - 9 mph during the evening.

OUTLOOK:

WEDNESDAY
In the west mixing height 1800 to 2800 ft during the morning rising to 2500 to 3500 ft during the afternoon.  In the east mixing height below 1000 ft early rising to 3400 to 4400 ft by late morning lowering to 2500 to 3500 ft during the afternoon.  In the west transport wind SSE to SSW at 16 - 26 mph.  In the east transport wind SSE to S at 10 - 22 mph.  Surface wind SE to SSW at 7 - 13 mph.

THURSDAY
Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

FRIDAY
Mixing height 3400 to 4400 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind S to SW at 5 - 9 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

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 Tuesday, November 3, 2009.
    ==================================================================

Zone 630 and 632:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the ESE through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the ESE through SW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

Zone 633 - 638:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00am.  Avoid ignitions within 20 miles to the ESE through SSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the ESE through SSW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:00pm.

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