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: Thursday, October 7, 2010       2:35 PM      Pete Parsons



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



FRIDAY



A blocking pattern in the upper-level flow will break down, as the trough over Nevada gets ejected eastward to over the northern Rockies.  Clouds and showers associated with the Nevada low will push eastward but will get replaced by some clouds from the first in a series of Pacific storms coming onshore.  Some breaks in the clouds will help with afternoon mixing, but transport winds will remain fairly light.


OUTLOOK (SATURDAY-MONDAY)


Two cold fronts will bring spread clouds back over the region this weekend with rain likely by Sunday.  Brisk southwesterly transport winds will veer to westerly, in the wake of the second cold front, Sunday evening.  The flow aloft will dry out and turn northwesterly on Monday.  Transport winds will turn northerly, with subsidence aloft suppressing afternoon mixing heights.



2.  DISPERSION



FRIDAY

Mixing height below 1000 ft early rising to 2200 - 3200 ft by late morning.  Afternoon mixing height rises to 3900 - 4900 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind SSE to SW at 6 - 12 mph during the morning becoming SW to WSW at 10 - 22 mph during the afternoon.  Surface wind light and variable during the morning becoming SSE to SSW at 6 - 10 mph during the afternoon.



SUNDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3000 to 4000 ft during the afternoon.  Transport wind S to SW at 9 - 15 mph.  Surface wind SE to SSW at 5 - 9 mph.



MONDAY

Mixing height 1200 to 2200 ft during the morning rising to 3000 to 4000 ft during the afternoon.  Transport wind NW to NNE at 4 - 8 mph.  Surface wind light and variable during the morning becoming NW to N at 4 - 8 mph during the afternoon.



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 Friday, October 8, 2010.

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



Avoid ignitions within 15 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles in all directions of 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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