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, June 19, 2010       2:35 PM      Pete Parsons



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



    SUNDAY


A broad and cool upper-level trough will remain over Washington and Oregon.  The center of an embedded upper-level disturbance will move over southwestern Oregon early in the morning and slowly progress eastward, to over southeastern Oregon, by evening.  Scattered showers will continue with a chance of thundershowers, especially across the eastern zones.  High temperatures will cool another 5-10 degrees, from Saturday, with generally northwesterly transport winds. Cool low-level onshore flow, considerable clouds, and showers will combine to produce only marginal mixing heights for late spring.

    OUTLOOK (MONDAY-WEDNESDAY)

A weak and transitory upper-level ridge will move over western Oregon Monday and drift eastward, to over eastern Oregon, on Tuesday.  Showers will taper off Monday, from west to east, with progressively more sunshine helping temperatures recover to near normal by Tuesday.  Transport winds will decrease Monday and perhaps become light southerly by Tuesday. A weak upper-level trough will bring increasing southwesterly flow aloft on Wednesday.  Temperatures will hold near normal with an increasing threat of showers or thunderstorms, by late in the day, from west to east across the region.  High afternoon mixing heights are expected during the outlook period.


2.  DISPERSION



SUNDAY

Mixing height below 1500 ft early rising to 2000 - 3000 ft by late morning.  Afternoon mixing height rises to 2900 - 3900 ft then lowers to 1500 - 2500 ft during the evening.



Transport wind NW to NNW at 10 - 18 mph.



Surface wind WNW to NNW at 8 - 12 mph.



OUTLOOK:



MONDAY

In the west mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  In the east mixing height 1800 to 2800 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind WSW to NW at 4 - 8 mph during the morning becoming WNW to NNW at 6 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 5 - 9 mph during the afternoon.



TUESDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.



WEDNESDAY

Mixing height below 1000 ft early rising to 4000 to 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph.  Surface wind light and variable.



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, June 20, 2010.

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



Avoid ignitions within 15 miles to the W through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the WSW through NNW in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  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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