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: Saturday, October 30, 2010       2:35 PM      Pete Parsons



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



SUNDAY



A cold front is forecast to bring rain to the region from Saturday night through Sunday morning, with decreasing showers during the day.  Rainfall totals should be around one-quarter of an inch.  Snow levels should remain in the 6000 to 6500 foot range with southwesterly transport winds and fair to ghould smoke dispersal conditions. Evening clearing should rapidly lower mixing heights.


OUTLOOK (MONDAY-WEDNESDAY)


An intense storm system is forecast to develop, in the western Gulf of Alaska, by Monday.  An associated warm front may bring considerable clouds and breezy south winds to the region Monday, but precipitation appears as if it will stay to the north and west of the region.  Snow levels will lift to above 8000 feet.  Mixing heights will drop some, from Sunday, but southerly transport winds will likely provide fair smoke dispersal conditions.



A strong upper-level ridge is forecast to build over Oregon Tuesday and Wednesday, pushing the threat of warm-frontal rain well to the north.  Stagnant conditions will spread northward across the region.  Valley fog should become more widespread with possible persistent surface-based inversions.  Southerly transport winds will slacken and turn offshore.  Low mixing heights will make for marginal to poor smoke dispersal conditions.  Smoke from higher ridges could possibly raise above surface-based inversions into light southerly transport winds.



2.  DISPERSION



SUNDAY



Transport wind SW to WSW at 12 - 24 mph during the morning.  Transport wind decreases to SSW to WSW at 10 - 18 mph during the afternoon and decreases to SSW to SW at 8 - 12 mph during the evening.



Surface wind SSW to SW at 7 - 11 mph.





OUTLOOK:



MONDAY

Mixing height 1500 to 2500 ft during the morning rising to 3000 to 4000 ft during the afternoon.  Transport wind S to SSW at 10 - 20 mph.  Surface wind SE to SSW at 6 - 10 mph.



TUESDAY

Mixing height below 1000 ft early rising to 1000 to 1700 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming ESE to SSE at 4 - 8 mph during the afternoon.  Surface wind light and variable.



WEDNESDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 1900 to 2900 ft during the afternoon.  Transport wind ESE to SSE at 8 - 12 mph.  Surface wind E to SE at 4 - 8 mph.



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, October 31, 2010.

    ==================================================================



Avoid ignitions within 12 miles to the SSW through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through WSW in or near drainages leading to SSRAs.  Complete ignitions by 4 p.m.



    =========================================================

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

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