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: Friday, June 4, 2010       2:40 PM      Pete Parsons



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



    SATURDAY


The region will get a break from the rains of the past couple of days, as a transitory upper-level ridge pushes an unseasonably strong westerly jet stream slightly north.  High pressure will also build at the surface with decreasing south-southwesterly transport winds.  Partly sunny skies will help temperatures recover to near normal. High afternoon mixing heights will provide good daytime smoke dispersal conditions.

    OUTLOOK (SUNDAY-TUESDAY)

The strong westerly jet stream will direct another, weaker, weather system across Washington and Oregon on Sunday.  Clouds and showers will cool surface temperatures back below normal.  Dry weather is expected on Monday with skies becoming partly to mostly sunny.  Temperatures should be near normal.  The next system is forecast to bring back a chance of rain by late Tuesday with showery and cooler weather likely Tuesday night and Wednesday.  High afternoon mixing heights will provide fair to good daytime smoke dispersal conditions during the outlook period.


2.  DISPERSION



SATURDAY

Mixing height below 1000 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 S to SW at 6 - 12 mph.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SSW to WSW at 4 - 8 mph during the afternoon and evening.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising to 3500 - 4500 ft during the afternoon.  Transport wind S to SW at 10 - 20 mph during the morning becoming SW to WSW at 15 - 29 mph during the afternoon.  Surface wind SSE to SSW at 6 - 10 mph during the morning becoming SW to W at 10 - 18 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 3500 - 4500 ft by late morning rising to 4500 - 5000 ft during the afternoon.  Transport wind ESE to S at 4 - 8 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 4000 - 5000 ft by late morning and through the afternoon.  Transport wind S to SW at 10 - 18 mph during the morning becoming S to SW at 15 - 25 mph during the afternoon.  Surface wind SSE to SW at 6 - 10 mph during the morning becoming S to SW at 10 - 18 mph during the afternoon.



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

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Saturday, June 5, 2010.

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Avoid ignitions within 12 miles to the SSE through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the SSE through WSW in or near drainages leading to SSRAs.  Complete ignitions by 5 p.m.



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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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