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

ODF Smoke Management Instructions smi_south_central at listsmart.osl.state.or.us
Sat Jun 5 14:17:31 PDT 2010


SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Saturday, June 5, 2010       2:40 PM      Pete Parsons



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



    SUNDAY


A strong westerly jet stream will direct another in a series of potent weather system across Washington and Oregon.  Widespread morning rain will give way to afternoon showers with a chance of thunderstorms.  Temperatures will cool back below normal.  High afternoon mixing heights and strong onshore flow will provide good daytime smoke dispersal conditions.

    OUTLOOK (MONDAY-WEDNESDAY)

No major change to the overall weather pattern is expected.  However, the region will get another brief break between storms on Monday, with skies becoming partly to mostly sunny in the afternoon.  Temperatures will warm to near normal.  The next system will bring another surge of onshore flow Tuesday and Wednesday.  Temperatures will cool back below normal by Wednesday with a good chance of showers.  Showery and cool weather is expected Thursday with skies slowly clearing on Friday.  High afternoon mixing heights will provide fair to good daytime smoke dispersal conditions during the outlook period.


2.  DISPERSION



SUNDAY

Mixing height below 1500 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2300 - 3300 ft during the evening.



Transport wind SSW to WSW at 14 - 28 mph during the morning and afternoon.  Transport wind decreases to WSW to WNW at 9 - 15 mph during the evening.



Surface wind S to SW at 8 - 14 mph during the morning.  Surface wind shifts to SW to W at 10 - 18 mph during the afternoon then decreases to W to NW at 5 - 9 mph during the evening.



OUTLOOK:



MONDAY

Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NNW at 4 - 8 mph during the afternoon.



TUESDAY

Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 9 - 15 mph during the morning becoming WSW to W at 12 - 22 mph during the afternoon.  Surface wind SSW to WSW at 5 - 9 mph during the morning becoming WSW to WNW at 10 - 18 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 2200 - 3200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 9 - 15 mph.  Surface wind WSW to WNW at 8 - 12 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 Sunday, June 6, 2010.

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



Avoid ignitions within 12 miles to the SSW through WNW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.



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

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

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