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: Thursday, September 16, 2010       2:40 PM      Pete Parsons



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



    FRIDAY



Skies will be mostly cloudy ahead of the next weather system moving across western Oregon.  Increasing south-southwesterly transport winds will help high temperatures climb to near normal and combine with high mixing heights to provide good ventilation conditions.


     OUTLOOK (SATURDAY-MONDAY)


A very moist southwesterly flow aloft will keep skies generally cloudy with surges of precipitation.  High temperatures will cool to below normal Saturday, with a little rain likely early.  Another round of rain is likely Sunday with significantly cooler temperatures and the snow level dropping to 8000 feet.  Showers will taper off Monday with continued well below normal temperatures.



2.  DISPERSION



FRIDAY

Mixing height below 500 ft early rising to 4000 - 5000 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1000 - 2000 ft during the evening.



Transport wind SSE to SSW at 9 - 15 mph during the morning.  Transport increases to S to SW at 12 - 22 mph during the afternoon then shifts to WSW to WNW and decreases to 8 - 12 mph during the evening.



Surface wind SSE to SW at 4 - 8 mph during the morning.  Surface increases to SSW to SW at 8 - 12 mph during the afternoon then shifts to WSW to WNW and decreases to 4 - 8 mph during the evening.



OUTLOOK:



SATURDAY

Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming SSW to SW at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming SW to W 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.



MONDAY

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph.  Surface wind SW to WNW at 4 - 8 mph.



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

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Friday, September 17, 2010.

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



Avoid ignitions within 12 miles to the SSE through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SE through WNW in or near drainages leading to SSRAs.  Watch for shifting transport winds.  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/20100916/0aec0ad3/attachment.html>