SMI South Central (Smoke Management Instructions) (no subject)

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Monday, November 15, 2010       2:40 PM      Jim Little



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





A broad flat ridge is centered off the Oregon Washington coast.  Upper level flow is from the west-northwest over the region.  Low level (transport) flow will be generally from the west or northwest except partly cloudy skies and cool temperatures.  Smoke dispersal conditions will be mostly fair to good.



    OUTLOOK (WEDNESDAY - FRIDAY)



A deep low, both at the surface and aloft develops in the Gulf of Alaska and begins to move toward the Pacific Northwest   Wednesday.  A Pacific cold front will push into Washington then drop southward, reaching NW Oregon by late morning.  This front will bring rain to the region on Thursday along with even cooler temperatures.  Snow levels will drop to around 4000 feet.  Smoke dispersal conditions through the outlook period should be generally fair to good.





2.  DISPERSION



TUESDAY

Mixing height 2800 - 3800 ft during the morning.  Mixing height rises above 5000 ft during the afternoon then lowers below 1000 ft during the evening.



Transport wind NW to NNW at 10 - 22 mph during the morning.  Transport wind decreases to WNW to NNW at 8 - 14 mph during the afternoon and decreases to WNW to NNW at 4 - 8 mph during the evening.



Surface wind NW to NNW at 10 - 18 mph during the morning.  Surface wind decreases to WNW to NNW at 6 - 10 mph during the afternoon then becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



WEDNESDAY

Mixing height below 1000 ft early rising to 1800 - 2800 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SW to WSW at 15 - 25 mph during the morning becoming SW to WSW at 23 - 41 mph during the afternoon.  Surface wind SSW to SW at 8 - 14 mph during the morning becoming SSW to WSW at 10 - 22 mph during the afternoon.



THURSDAY

Mixing height 2000 - 3000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 4 - 8 mph during the morning becoming SW to W at 4 - 8 mph during the afternoon.  Surface wind S to SW at 4 - 8 mph during the morning becoming SW to W at 4 - 8 mph during the afternoon.



FRIDAY

Mixing height below 1000 ft early rising to 2000 - 3000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 8 - 12 mph.  Surface wind SSW to WSW at 4 - 8 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 Tuesday, November 16, 2010.

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Avoid ignitions within 15 miles to the WNW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 30 miles to the SW through N in or near drainages leading to SSRAs.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 2:30pm.



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

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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