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: Sunday, April 12, 2009       7:45 AM      Jim Little

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

Precipitation from an approaching Pacific weather system will spread rainfall eastward during the day today.  Significant rain should hold off until afternoon.  Snow levels should remain above about 5500 feet.  Tightening pressure gradients will bring breezy winds to most of the region this afternoon and tonight.  Mixing heights will be favorable for good smoke dispersal.  Transport winds will be generally southerly to southwesterly.


2.  DISPERSION

SUNDAY

Zone 630 and 632:
Mixing height above 5000 ft throughout the day.  Mixing height lowers to 2300 - 3300 ft during the evening.

Transport wind SSW to SW at 12 - 22 mph during the morning.  Transport wind increases to SW to WSW at 14 - 28 mph during the afternoon then decreases to WSW to W at 10 - 22 mph during the evening.

Surface wind SSE to SSW at 8 - 14 mph during the morning.  Surface wind shifts to WSW to WNW at 8 - 12 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Zone 633 - 638:
Mixing height above 5000 ft during the morning.  Mixing height lowers to 3700 - 4700 ft during the afternoon and below 1000 ft during the evening.

Transport wind S to SW at 10 - 20 mph during the morning and afternoon.  Transport wind decreases to SW to WSW at 8 - 12 mph during the evening.

Surface wind SE to S at 5 - 9 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

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 Sunday, April 12, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 10 miles to the SSW through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 10 miles to the SSW through NW in or near drainages leading to SSRAs.  No additional restrictions necessary.

Zone 633 - 638:
Avoid ignitions within 12 miles to the S through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 12 miles to the S through NW in or near drainages leading to SSRAs.  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/20090412/d1fc9bd7/attachment.html>