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: Wednesday, June 16, 2010       2:35 PM      Jim Little

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

    THURSDAY

The upper low that has been plaguing the Pacific Northwest the past few days weakens and moves east but upper troughiness remains over the region on Thursday.  There will be a slight chance of mainly afternoon showers.  Temperatures continue below average for the time of year.  Afternoon mixing heights should push high enough for good smoke dispersal conditions.

    OUTLOOK (FRIDAY-SUNDAY)

A broad trough remains over the region throughout the outlook period.  There will be a slight chance of mainly afternoon showers each day throughout the outlook period - lowest chance on Friday, highest chance on Saturday.  Temperatures continue below average for the time of year.  None the less, there should be enough sunshine to warm surface temperatures enough that, combined with the cool air aloft, mixing heights will be pushed high enough during the afternoon for good smoke dispersal conditions.

2.  DISPERSION

THURSDAY

Zone 630 and 632:
Mixing height 3200 - 4200 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 1300 - 2300 ft during the evening.

Transport wind SW to W at 5 - 9 mph during the morning.  Transport wind shifts to N to NE at 8 - 12 mph during the afternoon and evening.

Surface wind SSW to W at 5 - 9 mph during the morning.  Surface wind shifts to NNW to NE at 6 - 12 mph during the afternoon and shifts to N to NE at 5 - 9 mph during the evening.

Zone 633 - 638:
Mixing height 4300 - 5000 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.

Transport wind SW to WNW at 6 - 12 mph during the morning.  Transport wind shifts to WNW to NNW at 6 - 10 mph during the afternoon and shifts to NNW to NNE at 4 - 8 mph during the evening.

Surface wind SW to WNW at 6 - 12 mph during the morning.  Surface wind shifts to WNW to NNW at 6 - 10 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

OUTLOOK:

FRIDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind ENE to ESE at 6 - 10 mph during the morning becoming NNE to ENE at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming NNE to ENE at 6 - 12 mph during the afternoon.

SATURDAY
Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SUNDAY
Mixing height 2200 to 3200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind light and variable.  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 Thursday, June 17, 2010.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of SSRAs.  Watch for shifting transport winds.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4:00pm.

Zone 633 - 638:
Avoid ignitions within 12 miles to the SW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Watch for shifting transport winds.  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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