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: Saturday, October 17, 2009       2:40 PM      Nick Yonker

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

Front and upper level trough will move across the region later today and tonight bringing mainly some increasing cloud cover over the region.  Most moisture will stay to the north of the region.  Minor ridging builds in early Sunday providing some modest stabilization.  Expect fair skies on Sunday with variable clouds.  Wind flow will be fairly light but with decent afternoon mixing, will make for fair to good smoke dispersion.

    OUTLOOK (MONDAY - WEDNESDAY):

Front and upper level low move into the region early Monday providing a better chance of moisture.  Low moves through Monday afternoon and gives way to a minor ridge that will develop over the state on Tuesday.  Again, this ridge will provide just brief and minor stabilization.  Another minor front will approach on Wednesday bringing another chance of some light rain mainly to the north.  Smoke dispersion should be mostly good through the period under this progressive weather pattern.

2.  DISPERSION

SUNDAY
Mixing height below 2000 ft early rising to 2800 - 3800 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers below 1000 ft during the evening.

Transport wind SSE to SW at 5 - 9 mph during the morning.  Transport wind shifts to SW to W at 8 - 12 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.

Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to SW to WNW at 6 - 12 mph during the afternoon and then becomes light and variable during the evening.

OUTLOOK:

MONDAY
Mixing height below 1000 ft early rising to 3200 - 4200 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 8 - 14 mph during the morning becoming WSW to WNW at 10 - 16 mph during the afternoon.  Surface wind SSW to WSW at 6 - 10 mph during the morning becoming WSW to WNW at 8 - 12 mph during the afternoon.

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

WEDNESDAY
Mixing height below 1000 ft early rising to 3000 - 4000 ft by late morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SW to W at 10 - 20 mph.  Surface wind SSW to WSW at 6 - 10 mph during the morning becoming WSW to WNW at 8 - 12 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 Sunday, October 18, 2009.
==================================================================

Avoid ignitions within 12 miles to the SSE through WNW of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.

==============================================================
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/20091017/1a71defb/attachment.html>