SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Friday, September 24, 2010       2:35 PM      Pete Parsons



1.  DISCUSSION AND FORECAST FOR NORTHEAST FORECAST AREA ZONES 630-638


    SATURDAY


Southwesterly flow aloft will begin to increase Saturday, as a broad upper-level ridge shifts east of Oregon.  Mostly sunny skies will provide the heating for good afternoon mixing.  Increasing transport wind speeds will improve ventilation conditions.


    OUTLOOK (SUNDAY-TUESDAY)


A very weak weather system is forecast to move onshore Sunday, with some middle and high clouds likely streaming into the region.  Daytime smoke dispersion should be good.  The upper-level ridge is forecast to rebuild Monday with morning inversions and slackening transport winds.  Increasing southwesterly flow aloft is forecast to bring another weak system into western Washington and northwestern Oregon Tuesday.  Increasing transport winds should improve daytime ventilation conditions with good afternoon mixing.



2.  DISPERSION



SATURDAY



Zone 630 and 632:

Mixing height below 500 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.



Transport wind S to SSW at 9 - 15 mph during the morning and afternoon.  Transport wind becomes light and variable and controlled by local terrain during the evening.



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



Zone 633 - 638:

Mixing height below 500 ft early rising to 2500 - 3500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.



Transport wind SSE to SSW at 9 - 15 mph during the morning and afternoon.  Transport wind decreases to SSE to SSW at 6 - 10 mph during the evening.



Surface wind SE to SSW at 4 - 8 mph.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to W at 6 - 10 mph.  Surface wind light and variable during the morning becoming W to NW at 4 - 8 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4000 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SSW to WSW at 4 - 8 mph during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.  Surface wind light and variable during the morning becoming WNW to NW at 8 - 12 mph during the afternoon.



3.  BURNING INSTRUCTIONS FOR NORTHEAST OREGON ZONES 630-638

    The following considerations should be adhered to in addition to

    the requirements of the Oregon Smoke Management Plan. These

    Instructions are valid for burning conducted on Saturday and Sunday, September 25 and 26, 2010.

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



For Saturday:



Zone 630 and 632:

Avoid ignitions within 15 miles to the SSE through WSW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSE through W in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4 p.m.



Zone 633 - 638:

Avoid ignitions within 15 miles to the SSE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SSE through W in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 4 p.m.



For Sunday:



Avoid ignitions within 15 miles to the SW through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SW through NNE 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. Please call this number and not individual's

    numbers to discuss daily burning.  For large burns (over

    2000 tons) or burns extending over a considerable period,

    please request a special forecast.  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_northeast/attachments/20100924/af920959/attachment.html>