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: Sunday, October 31, 2010       2:40 PM      Jim Little



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


    MONDAY
On Monday a ridge in the upper atmosphere will extend from southern California to the northern Rockies and an upper level low will be centered in the Gulf of Alaska.  Winds around these two features will leave the Pacific Northwest in a southwesterly flow aloft.  A Pacific cold front nearly parallel to the flow will slowly move into the Pacific Northwest.  Heaviest rain will be in western Washington but rain reaching south-central Oregon will be spotty and light.  Expect brisk south-southwest transport winds ahead of the front and mixing heights climbing into the 3000 to 3500 foot range most areas.

EXTENDED OUTLOOK (TUESDAY - THURSDAY)
      *** Marginal to Poor Ventilation Ventilation Conditions after Monday ***
The low in the Gulf deepens and the ridge over the western US expands for dry weather through the middle part of the week.  Transport winds will become light and by Tuesday with a tendency to east-northeast. Wednesday and Thursday transports will still be light but with a tendency toward southeast or south-southeast.  Maximum mixing heights will generally be less than 2500 feet with very stable conditions overnight keeping any residual smoke close to the ground.





2.  DISPERSION



MONDAY

Mixing height 1700 - 2700 ft during the morning.  Afternoon mixing height rises to 2800 - 3800 ft then lowers to 1000 - 1600 ft during the evening.



Transport wind SW to WSW at 14 - 28 mph.



Surface wind SSW to WSW at 10 - 22 mph during the morning and afternoon.  Surface wind decreases to SW to W at 5 - 9 mph during the evening.



OUTLOOK:



TUESDAY

Mixing height below 1000 ft early rising to 1400 - 2400 ft by late morning and through the afternoon.  Transport wind light and variable during the morning becoming ENE to E at 10 - 16 mph during the afternoon.  Surface wind light and variable during the morning becoming ENE to E at 8 - 12 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 1000 - 2000 ft by late morning and through the afternoon.  Transport wind light and variable.  Surface wind light and variable.



THURSDAY

Mixing height below 1000 ft during the morning rising to 1800 - 2800 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



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

    RANGE PORTION OF ZONE 624

This instruction is valid for burning conducted on Monday, November 1, 2010.

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



Avoid ignitions within 15 miles to the SSW through W 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.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  Recommend against burning units that will smolder significantly overnight.  Complete ignitions by 3:30pm.



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

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_south_central/attachments/20101031/c5d9685b/attachment.html>