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: Sunday, November 8, 2009       2:30 PM      Jim Little

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

After a brief respite from rain later Sunday another Pacific cold front will move in Monday afternoon and Monday night.  Precipitation from this system will be lighter than what fell Saturday and Sunday morning.  Snow level will be around 4000 feet.  Mixing heights will be high for good smoke dispersal conditions.

    OUTLOOK (TUESDAY-THURSDAY)

An upper level trough in the Gulf of Alaska will dominate weather through the outlook period.  The trough will move slowly eastward and be exiting the region by Friday.  Several weather systems will rotate around that upper system and affect the area.  The strongest of those will be on Wednesday.  The net result will be mostly wet and windy weather with high mixing heights and good smoke dispersal conditions.

2.  DISPERSION

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

MORNING
Mixing height 3000 - 4000 ft.
Transport wind SSW to SW at 15 - 25 mph.
Surface wind S to SW at 8 - 12 mph.

AFTERNOON
Mixing height rising above 5000 ft.
Transport wind S to SSW at 12 - 22 mph.
Surface wind SSE to SSW at 6 - 10 mph.

EVENING
Mixing height 1600 - 2600 ft.
Transport wind shifts to SW to W at 10 - 22 mph.
Surface wind shifts to SSW to WSW at 6 - 10 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind S to SSW at 13 - 25 mph.
Surface wind S to SSW at 12 - 22 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SSE to S at 14 - 28 mph.
Surface wind SSE to S at 12 - 24 mph.

EVENING
Mixing height 2800 - 3800 ft.
Transport wind S to SW at 12 - 24 mph.
Surface wind SSW to SW at 10 - 22 mph.

Zone 615-620 (South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind SSE to SSW at 10 - 18 mph.
Surface wind SSE to SSW at 8 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to SSW to SW at 14 - 28 mph.
Surface wind increases to SSW to SW at 10 - 22 mph.

EVENING
Mixing height 2400 - 3400 ft.
Transport wind decreases to SSW to WSW at 10 - 20 mph.
Surface wind decreases to SSW to WSW at 8 - 12 mph.

Zone 616-623 (South Cascades):

MORNING
Mixing height 3000 - 4000 ft.
Transport wind S to SW at 8 - 14 mph.
Surface wind S to SW at 6 - 12 mph.

AFTERNOON
Mixing height 4000 - 5000 ft.
Transport wind increases to S to SSW at 15 - 25 mph.
Surface wind increases to S to SSW at 10 - 22 mph.

EVENING
Mixing height 2000 - 3000 ft.
Transport wind decreases to SSE to SSW at 8 - 12 mph.
Surface wind decreases to SSE to SSW at 6 - 10 mph.

OUTLOOK:

TUESDAY
In the north mixing height 2400 to 3400 ft during the morning rising to 3500 to 4500 ft during the afternoon.  In the south mixing height 1400 to 2400 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind SSW to WSW at 6 - 12 mph.  Surface wind S to SW at 5 - 9 mph.

WEDNESDAY
Mixing height 3500 to 4500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 10 - 16 mph during the morning becoming W to NW at 5 - 9 mph during the afternoon.  Surface wind light and variable.

THURSDAY
Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 10 - 16 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Monday, November 9, 2009.
=================================================================

Coast Range

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


Cascades

Zone 605, 606, and 611
Units should be 1000 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 607 and 608
Units should be 1500 tons or less, spaced 5 miles apart, and 10 miles from downwind SSRAs.

Zone 609, 610, 616, 617, 620, 622, and 623
Use standard guidance matrix. (See section 5 below.)  Ensure adequate distance from downwind SSRAs for smoke to dissipate.  Avoid ignitions north of T24S in Zone 616.


Siskiyous
Units should be 1000 tons or less, spaced 8 miles apart, and 10 miles from downwind SSRAs.

==============================================================
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/20091108/eefc328e/attachment.html>