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: Friday, November 20, 2009       2:30 PM      Nick Yonker

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

Cold front is moving through the region today and will have moved east of the region by this evening.  Cold upper level trough will move through overnight and bring a few lingering showers.  Next frontal system and trough race toward the region tomorrow with moisture beginning again by the afternoon.  Expect mostly unstable conditions and brisk wind flow, leading to excellent smoke dispersion.

    OUTLOOK (SUNDAY - TUESDAY)

Upper level trough will move through the state early Sunday following Saturday night's front.  Upper level ridge will follow and bring mostly dry conditions through Tuesday.  A warm front will ride over the top and may give a little moisture to the extreme northern part of the state.  After unstable conditions on Sunday, the air mass will stabilize through Tuesday.  Expect good to excellent smoke dispersion Sunday then deteriorating dispersion Monday and Tuesday.

2.  DISPERSION

Zone 601, 602, 603, 612 and 615-620 (North and South Coast Range):

MORNING
Mixing height above 5000 ft.
Transport wind SSW at 18 - 32 mph.
Surface wind S to SW at 10 - 20 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SSW at 22 - 40 mph.
Surface wind S to SSW at 13 - 25 mph.

EVENING
Mixing height 3500 - 4500 ft.
Transport wind SSW at 30 - 50 mph.
Surface wind SSW at 19 - 33 mph.

Zone 605-611 (North Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind S to SW at 15 - 30 mph.
Surface wind S to SW at 9 - 15 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind SSW at 22 - 38 mph.
Surface wind increases to S to SSW at 12 - 24 mph.

EVENING
Mixing height 3500 - 4500 ft.
Transport wind S at 28 - 48 mph.
Surface wind similar to afternoon.

Zone 616-623 (South Cascades):

MORNING
Mixing height above 5000 ft.
Transport wind SSE to SSW at 10 - 16 mph.
Surface wind SSE to SSW at 8 - 12 mph.

AFTERNOON
Mixing height above 5000 ft.
Transport wind increases to S to SW at 15 - 25 mph.
Surface wind S to SW at 6 - 12 mph.

EVENING
Mixing height 2500 - 3500 ft.
Transport wind S at 18 - 32 mph.
Surface wind increases to SSE to SSW at 10 - 20 mph.

OUTLOOK:

SUNDAY
Mixing height 4400 to 5000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind W to NW at 15 - 25 mph during the morning becoming W to NW at 8 - 12 mph during the afternoon.  Surface wind W to NW at 10 - 16 mph during the morning becoming WSW to NW at 5 - 9 mph during the afternoon.

MONDAY
Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning and through the afternoon.  Transport wind SSW to WSW at 10 - 16 mph during the morning becoming SW to W at 10 - 22 mph during the afternoon.  Surface wind SSE to SSW at 5 - 9 mph.

TUESDAY
Mixing height below 1000 ft early rising to 1000 to 1600 ft by late morning and through the afternoon.  Transport wind SSE to SSW at 5 - 9 mph.  Surface wind SE to S at 4 - 8 mph during the morning becoming light and variable during the afternoon.

3.  BURNING INSTRUCTIONS FOR ALL ZONES IN THE WESTERN OREGON AREA
These instructions are valid for burning conducted on Saturday, November 21, 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.  Verify transport winds away from SSRA if burning within 10 miles of the SSRA in Zone 605 and 606.  Avoid ignitions north of T24S in Zone 616.

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.


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