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, May 31, 2010       2:35 PM      Jim Little

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

    WEDNESDAY

An upper level low in the Gulf of Alaska gives west-southwesterly flow aloft over the region.  Minor impulses traveling WSW to NNE in the flow keep scattered showers going through the day.  Skies will be mostly cloudy and smoke dispersal conditions will be fair to good.

    OUTLOOK (THURSDAY-SATURDAY)

The upper low moves slightly west Wednesday and upper flow over the area becomes slightly more southwest.  A more significant impulse drives a Pacific front to the coast early on Wednesday. Rain will spread eastward during the morning and early afternoon.  Smoke dispersal conditions will be fair to good.  On Thursday the southwest flow aloft continues but the region will be between weather systems.  Never the less there will still be enough moisture around for scattered showers.  Slightly warmer surface temperatures should push afternoon mixing heights up a bit for generally good smoke dispersal conditions.  A more significant spring storm will develop Friday as a surface low off the SW Oregon coast.  This will track from SW to NE toward northwest Washington.  Look for rain and brisk winds throughout the day.

2.  DISPERSION

TUESDAY

Zone 630 and 632:
Mixing height below 1000 ft early rising to 2800 - 3800 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 1800 - 2800 ft during the evening.

Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to SSW to WSW at 6 - 10 mph during the afternoon and evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SSW to WSW at 4 - 8 mph during the afternoon then shifts to WSW to WNW at 5 - 9 mph during the evening.

Zone 633 - 638:
Mixing height below 1000 ft early rising to 2100 - 3100 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers to 1000 - 2000 ft during the evening.

Transport wind light and variable and controlled by local terrain.  Transport wind increases to SSW to WSW at 5 - 9 mph during the evening.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

WEDNESDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  In the west transport wind SSW to SW at 18 - 32 mph.  In the east transport wind S to SW at 12 - 24 mph.  Surface wind S to SW at 10 - 16 mph.

THURSDAY
Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SSW to SW at 12 - 22 mph.  Surface wind SSW to SW at 8 - 12 mph.

FRIDAY
Mixing height 2500 to 3500 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SSW to SW at 25 - 45 mph during the morning becoming WSW to WNW at 10 - 18 mph during the afternoon.  Surface wind SSW to SW at 15 - 29 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.

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, June 1, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the SSW through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the S through NNW in or near drainages leading to SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
Avoid ignitions within 15 miles in all directions of SSRAs.  Complete ignitions by 4:00pm.

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