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: Wednesday, September 15, 2010       2:40 PM      Pete Parsons



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



    THURSDAY


A weakening cold front will give way to a transitory upper-level ridge of high pressure with a warm west-southwesterly flow aloft.  Skies should be partly to mostly cloudy with near-normal temperatures.

     OUTLOOK (FRIDAY-SUNDAY)


Southwesterly flow aloft will increase Friday with another cold front forecast to move onshore in the afternoon. Showers may spread into the region Friday night, with an upper-level trough producing some showers Saturday and Sunday.  Temperatures will cool to below normal over the weekend.



2.  DISPERSION



THURSDAY

Mixing height below 500 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.



Transport wind S to SW at 6 - 12 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SW to WNW at 4 - 8 mph during the afternoon then becomes light and variable during the evening.



OUTLOOK:



FRIDAY

Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SE to SSW at 6 - 10 mph during the morning becoming SSW to WSW at 9 - 15 mph during the afternoon.  Surface wind light and variable during the morning becoming SSW to WSW at 8 - 12 mph during the afternoon.



SATURDAY

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SSE to SSW at 6 - 12 mph during the morning becoming SSW to WSW at 6 - 12 mph during the afternoon.  Surface wind SE to SSW at 4 - 8 mph during the morning becoming SSW to WSW at 4 - 8 mph during the afternoon.



SUNDAY

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind S to SW at 6 - 10 mph.  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 Thursday, September 16, 2010.

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



Avoid ignitions within 12 miles to the S through NNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  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/20100915/d60c9a72/attachment.html>