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: Wednesday, October 20, 2010       2:35 PM      Pete Parsons



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



THURSDAY



The strong upper-level ridge that has been over the region for the past few days will shift eastward to over the northern Rockies.  The first in a series of weather systems is forecast to bring increasing clouds to the region late in the day. Increasing south to southwesterly transport winds and higher mixing heights will combine to improve afternoon smoke dispersal conditions to fair.


OUTLOOK (FRIDAY-SUNDAY)


A dissipating cold front will bring clouds and spotty sprinkles to the region early Friday.  West-southwesterly flow aloft will maintain considerable clouds across the region in the afternoon, but it should stay mostly dry.  Further cooling aloft will continue to lift mixing heights with fair to good afternoon smoke dispersal conditions.  A little stronger system is forecast to bring a chance of light rain to the region on Saturday.  Daytime smoke dispersion will remain fair to good.  A much stronger and moisture-laden cold front is forecast to spread rain across the entire region Sunday, along with brisk southwesterly to westerly transport winds.



2.  DISPERSION



THURSDAY



Zone 630 and 632:

Mixing height below 500 ft early rising to 2000 - 3000 ft by late morning.  Afternoon mixing height rises to 2700 - 3700 ft then lowers to 1000 - 2000 ft during the evening.



Transport wind S to SW at 4 - 8 mph.



Surface wind light and variable and controlled by local terrain.  Surface wind increases to S to SW at 4 - 8 mph during the evening.



Zone 633 - 638:

Mixing height below 500 ft early rising to 1500 - 2500 ft by late morning.  Afternoon mixing height rises to 2300 - 3300 ft then lowers below 1000 ft during the evening.



Transport wind SSE to SSW at 4 - 8 mph throughout the day.



Surface wind light and variable and controlled by local terrain.



OUTLOOK:



FRIDAY

Mixing height below 1000 ft early rising to 2000 to 3000 ft by late morning rising to 3500 to 4500 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



SATURDAY

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



SUNDAY

Mixing height 2200 to 3200 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SW to WSW at 25 - 45 mph during the morning becoming WSW to W at 22 - 38 mph during the afternoon.  Surface wind SSE to SSW at 10 - 18 mph during the morning becoming SW to WSW at 9 - 15 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 Thursday, October 21, 2010.

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



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.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30 p.m.



Zone 633 - 638:

Unfavorable burning situation due to very poor smoke dispersion.  Delay ignitions until 10:00 a.m.  Avoid ignitions within 20 miles to the SE through SW of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 35 miles to the SE through NW in or near drainages leading to SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30 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/20101020/f40a9733/attachment.html>