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 5, 2009       2:30 PM      Nick Yonker

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

Rather strong cold front moves into the region this evening bringing a good dose of moisture and brisk wind.  Air mass will remain mostly unstable tonight with good to excellent mixing and smoke dispersion tomorrow.  Rain turns to showers on Friday with continued blustery winds as the upper level trough moves in.  Snow level will lower to 4000 ft in the north and 5000 ft in the south.

    OUTLOOK (SATURDAY - MONDAY)

Upper level trough remains over the region on Saturday with impulses of moisture keeping the area wet, and accumulating good amounts of snow in the mountains above 3500 - 4000 ft.  Upper trough moves by to the east on Sunday with a minor ridge building in.  Showers will diminish.  Air mass will begin stabilizing Sunday night under the ridge after another unstable day Sunday.  Ridge will then move by to the east and yield to another front and trough moving in Monday afternoon.  Expect generally good mixing and dispersion through the period under this fall-like blustery rain pattern.

2.  DISPERSION

Zone 601-612 (North Coast Range and Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind WSW at 22 - 38 mph.
Surface wind SW to WSW at 12 - 24 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind WSW at 20 - 35 mph.
Surface wind similar to morning.

EVENING
Mixing height remains above 5000 ft.
Transport wind SW to WSW at 15 - 30 mph.
Surface wind SSW to WSW at 10 - 16 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height below 2000 ft early rising to 2800 - 3800 ft by late morning.
Transport wind SW to WSW at 13 - 25 mph.
Surface wind SSW to WSW at 10 - 20 mph.

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

EVENING
Mixing height remains above 5000 ft.
Transport wind SW to W at 10 - 18 mph.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height below 2000 ft early rising to 2500 - 3500 ft by late morning.
Transport wind SSW to WSW at 10 - 16 mph.
Surface wind SSW to SW at 8 - 12 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind similar to morning.
Surface wind SW to W at 6 - 10 mph.

EVENING
Mixing height remains above 5000 ft.
Transport wind similar to afternoon.
Surface wind similar to afternoon.

OUTLOOK:

SATURDAY
Mixing height above 5000 ft throughout the day.  Transport wind SSW to SW at 16 - 30 mph during the morning becoming WSW to W at 15 - 25 mph during the afternoon.  Surface wind SSW to WSW at 10 - 16 mph during the morning becoming SW to W at 10 - 20 mph during the afternoon.

SUNDAY
Mixing height above 5000 ft throughout the day.  Transport wind SSW to WSW at 8 - 12 mph.  Surface wind SSE to SSW at 4 - 8 mph.

MONDAY
Mixing height below 1000 ft early rising to 2200 to 3200 ft by late morning rising to 3800 to 4800 ft during the afternoon.  Transport wind SSE to SSW at 22 - 38 mph during the morning becoming SSW to SW at 18 - 32 mph during the afternoon.  Surface wind SSE to S at 12 - 22 mph.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Friday, November 6, 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/20091105/1eb14814/attachment.html>