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: Friday, June 11, 2010       2:35 PM      Pete Parsons



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



    SATURDAY


An upper-level ridge will extend from southwestern Oregon to northeastern Washington.  Winds aloft and at transport level will turn northerly with continued drying and warming of the air mass.  After a chilly start, with surface-based morning temperature inversions, plenty of sunshine will help afternoon temperatures recover to near normal.  High afternoon mixing heights should make for good daytime smoke dispersal conditions.  Clearing skies will allow temperatures and mixing heights to quickly drop off in the evening, so residual smoke may stay near the ground.

    OUTLOOK (SUNDAY-TUESDAY)

The upper-level ridge axis is forecast to shift over the region by Sunday afternoon.  Temperatures will warm to slightly above normal with transport winds becoming light northerly.  A cold front is forecast to sweep across the state Monday with increasing southwesterly flow aloft.  This system is fairly dry, but conditions may be unstable enough for it to produce a line of scattered showers or thunderstorms in the afternoon and evening.  At the very least, it will bring some clouds and a return to onshore flow, which will cool temperatures several degrees both Monday and Tuesday. Daytime heating should continue to yield high afternoon mixing heights.


2.  DISPERSION



SATURDAY

Mixing height below 1500 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind NNE to NE at 10 - 22 mph.



Surface wind N to NE at 9 - 15 mph.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming NNW to NNE at 5 - 9 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to NNE at 5 - 9 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 3500 to 4500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NW to NNE at 4 - 8 mph during the morning becoming NNW to NNE at 10 - 20 mph during the afternoon.  Surface wind light and variable during the morning becoming NNW to NNE at 9 - 15 mph during the afternoon.



TUESDAY

Mixing height 2500 to 3500 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to NNW at 8 - 12 mph.  Surface wind WNW to NNW at 5 - 9 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 Saturday, June 12, 2010.

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



Avoid ignitions within 10 miles to the N through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the NNW through NE in or near drainages leading to SSRAs.



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

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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