SMI South Central (Smoke Management Instructions) South Central Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Saturday, October 16, 2010       2:40 PM      Nick Yonker



1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625



Weak upper level trough over the region today will dissipate and give way to an upper level ridge that will build into the region through early next week.  Surface high pressure will build to the north with a thermal trough moving up from California.  This will bring mostly northerly to offshore flow.  Expect mostly sunny skies.  Air mass will further stabilize and with generally light wind flow, make for poor smoke dispersion.



    OUTLOOK (MONDAY - WEDNESDAY):



Upper level ridge continues to strengthen over the state Monday and Tuesday before slowly shifting eastward on Wednesday.  Expect little change in the pattern with high pressure to the north and a surface thermal trough to the west maintaining a very light wind flow.  Expect continued stable conditions through the period and poor smoke dispersion.



2.  DISPERSION



SUNDAY

Mixing height below 1000 ft early rising to 2300 - 3300 ft by late morning.  Afternoon mixing height rises to 4000 - 5000 ft then lowers below 1000 ft during the evening.



Transport wind light and variable and controlled by local terrain.  Transport wind increases to NNE to NE at 9 - 15 mph during the evening.



Surface wind light and variable and controlled by local terrain through the day.  Surface wind increases to N to ENE at 4 - 8 mph during the evening.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 1300 - 2300 ft by late morning rising to 3000 - 4000 ft during the afternoon.  Transport wind NE to E at 4 - 8 mph.  Surface wind light and variable.



TUESDAY

Mixing height 1000 - 2000 ft during the morning rising to 2500 - 3500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



WEDNESDAY

Mixing height 1000 - 2000 ft during the morning rising to 3300 - 4300 ft during the afternoon.  Transport wind light and variable during the morning becoming SE to SSW at 4 - 8 mph during the afternoon.  Surface wind light and variable.



3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Sunday, October 17, 2010.

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



Avoid ignitions within 15 miles to the N through SSE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the N through SSE 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.  The smoke management forecaster is available

    to discuss specific burns.  The duty forecaster phone

    number is (503) 945-7401. Please call this number and

    not individual's numbers to discuss daily burning. Please

    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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_south_central/attachments/20101016/53e54b3b/attachment.html>