SMI West (Smoke Management Instructions) Western Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

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

ISSUED: Thursday, November 12, 2009       7:30 AM      Nick Yonker

1.  DISCUSSION AND FORECAST FOR THE WESTERN OREGON AREA FORECAST ZONES 601-623

Upper level low is moving through the region early this morning bringing continued shower activity and low snow levels.  Air mass will be mostly unstable today with minor stability over the southern and eastern parts of the region during the morning hours.  Weak ridging moves in this afternoon and evening before the next frontal system and trough move in tomorrow.  Expect generally diminishing showers activity through the day.  Despite the minor ridging, plenty of cool air aloft should make for good mixing and dispersion.

2.  DISPERSION

Zone 601, 602, 603 and 612 (North Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind SW to W at 15 - 25 mph.
Surface wind WSW to WNW at 8 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind decreases to SW to W at 8 - 14 mph.
Surface wind SW to W at 5 - 9 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind similar to afternoon.
Surface wind SSW to WSW at 4 - 8 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind SSW to WSW at 12 - 22 mph.
Surface wind SSW to WSW at 6 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind decreases to SSW to W at 6 - 12 mph.
Surface wind similar to morning.

EVENING
Mixing height 2000 - 3000 ft.
Transport wind SSW to WSW at 6 - 12 mph.
Surface wind similar to afternoon.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 3000 ft early rising to 4000 - 5000 ft by late morning.
Transport wind WSW to WNW at 8 - 14 mph.
Surface wind WSW to WNW at 6 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind WSW to WNW at 6 - 10 mph.
Surface wind becomes light and variable but favors S to W and controlled by local terrain.

EVENING
Mixing height lowers below 1000 ft.
Transport wind becomes light and variable but favors SW to W.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 3000 ft early rising to 3000 - 4000 ft by late morning.
Transport wind SSW to WSW at 6 - 12 mph.
Surface wind SSW to WSW at 6 - 10 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind SW to WNW at 4 - 8 mph.
Surface wind becomes light and variable but favors SW to NW and controlled by local terrain.

EVENING
Mixing height lowers below 1000 ft.
Transport wind becomes light and variable but favors SW to NW.
Surface wind similar to afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Thursday, November 12, 2009.
=================================================================

Coast Range

All Zones
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.


Cascades

All zones except zone 611
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

Zone 611
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.


Siskiyous
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.

==============================================================
4.  SPECIAL NOTE:

    Call the smoke management duty forecaster at (503) 945-7401 to
    discuss burning.  Please do not call individual's numbers to
    discuss daily burning.  If the forecaster is not available,
    leave a message and he will return your call as soon as possible.
    Avoid calling between 2 to 2:30 p.m.

    The 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


5.  STANDARD GUIDANCE MATRIX:

  * Greater than 5000 ft mixing height:  No burning within 5 miles of
    downwind SSRA.  Maximum 100 tons per mile from downwind SSRA.
    Example:  500 ton maximum allowed if burned 5 miles from downwind SSRA.

  * 3000 - 5000 ft mixing height:  No burning within 10 miles of
    downwind SSRA.  Maximum 75 tons per mile from downwind SSRA.
    Example:  750 ton maximum allowed if burned 10 miles from downwind SSRA.

  * Less than 3000 ft mixing height:  No burning within 15 miles of
    downwind SSRA.  Maximum 50 tons per mile from downwind SSRA.
    Example:  750 ton maximum allowed if burned 15 miles from downwind SSRA.

  * All exceptions must be coordinated with the duty forecaster
    prior to ignition.


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_west/attachments/20091112/e226459b/attachment.html>