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: Thursday, November 5, 2009       2:35 PM      Nick Yonker

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

Cold front and upper level trough are approaching the region this afternoon and will bring increasing clouds to the area later this afternoon and evening.  Moisture will spread in from the west to the east overnight.  Cold front will move through tomorrow morning with rain turning to showers as the upper level trough follows.  Snow level will lower to around 5000 - 6000 ft.  Front will bring improving mixing and dispersion under brisk SW'erly flow.

    OUTLOOK (SATURDAY - MONDAY):

Upper level trough will remain over the region until Sunday keeping the air mass cool, moist, and unstable.  Brief upper ridge follows Sunday with the air mass stabilizing Sunday night.  Ridge then gets shoved eastward by the next front and trough on Monday.  Expect an increasing chance of moisture later Monday.  With the exception of the brief ridge, the air mass should remain mostly unstable, and smoke dispersion good through the period.

2.  DISPERSION

FRIDAY
Mixing height below 3000 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft and remains above 5000 ft through the evening.

Transport wind SW to W at 20 - 35 mph during the morning and afternoon.  Transport wind decreases to WSW to W at 15 - 28 mph during the evening.

Surface wind SW to W at 15 - 25 mph.

OUTLOOK:

SATURDAY
Mixing height 4000 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SW to WSW at 14 - 28 mph.  Surface wind SSW to WSW at 10 - 20 mph.

SUNDAY
Mixing height 4500 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph.  Surface wind SW to W at 6 - 10 mph.

MONDAY
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 SSE to S at 10 - 22 mph during the morning becoming SSE to SSW at 15 - 30 mph during the afternoon.  Surface wind SE to S at 6 - 10 mph during the morning becoming SE to SSW at 10 - 18 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 Friday, November 6, 2009.
    ==================================================================

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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20091105/b350ca86/attachment.html>