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

ODF Smoke Management Instructions smi_northeast at listsmart.osl.state.or.us
Tue Dec 8 14:44:10 PST 2009


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

ISSUED: Tuesday, December 8, 2009       2:35 PM      Jim Little

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

Wednesday will see continued cold, dry, northerly flow aloft.  A surface high pressure area over northern Idaho will give light winds to the region.  Weather will remain dry. Low mixing heights will mean poor smoke dispersal conditions.

    OUTLOOK (THURSDAY-SATURDAY)

Upper flow becomes slightly more northwesterly and the surface high pressure area moves to southeast Wyoming on Thursday.  Low level flow will become southerly and low mixing heights will continue poor smoke dispersal conditions.  On Friday upper flow continues to back and becomes west to northwest over the area.  Mixing heights will remain quite low.  On Saturday an upper trough will move into northern California and spread moisture northward.  This will start out as snow then slowly change to rain except in the Columbia basin where cold air will keep precipitation as snow or freezing rain. Mixing heights will rise to near 3000 feet.

2.  DISPERSION

WEDNESDAY

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

Transport wind WSW to NW at 5 - 9 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon and evening.

Surface wind light and variable and controlled by local terrain.

Zone 633 - 638:
Mixing height below 1000 ft during the morning.  Afternoon mixing height rising to 1000 - 2000 ft then lowering below 1000 ft during the evening.

Transport wind light and variable and controlled by local terrain.

Surface wind light and variable and controlled by local terrain.

OUTLOOK:

THURSDAY
Mixing height below 1000 ft during the morning rising to 1200 to 2200 ft during the afternoon.  Transport wind SSW to WSW at 6 - 10 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

FRIDAY
Mixing height 1000 to 1800 ft throughout the day.  Transport wind light and variable.  Surface wind light and variable.

SATURDAY
Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 2500 to 3500 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 Wednesday, December 9, 2009.
    ==================================================================

Zone 630 and 632:
Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 11:00am.  Avoid ignitions within 20 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles in all directions of SSRAs.  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 11:00am.  Avoid ignitions within 20 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles in all directions of 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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listsmart.osl.state.or.us/pipermail/smi_northeast/attachments/20091208/fa4aa09f/attachment.html>


More information about the SMI_Northeast mailing list