SMI Northeast (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       2:35 PM      Jim Little



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


    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 with any rain reaching northeast or north central Oregon holding off until evening and amounts would be quite light.  Expect brisk south-southwest transport winds ahead of the front and mixing  heights climbing into the 3500 to 4000 foot range most areas.
EXTENDED OUTLOOK (TUESDAY - THURSDAY)
      *** Marginal 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 shift to light and variable Tuesday then to light southeasterly Wednesday and Thursday.  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



Zone 630 and 632:

Mixing height 2200 - 3200 ft during the morning.  Afternoon and evening mixing rises to 3300 - 4300 ft.



Transport wind SSW to SW at 18 - 30 mph during the morning.  Transport wind decreases to SW to W at 12 - 24 mph during the afternoon then increases to SW to WSW at 16 - 30 mph during the evening.



Surface wind SSW to SW at 12 - 22 mph during the morning.  Surface wind decreases to SW to W at 9 - 15 mph during the afternoon and evening.



Zone 633 - 638:

Mixing height 2600 - 3600 ft during the morning.  Afternoon and evening mixing rises to 3300 - 4300 ft.



Transport wind S to SSW at 15 - 25 mph during the morning.  Transport wind shifts to SW to W and decreases to 10 - 18 mph during the afternoon and evening.



Surface wind S to SSW at 10 - 22 mph during the morning.  Surface wind shifts to SW to W and decreases to 8 - 12 mph during the afternoon and evening.



OUTLOOK:



TUESDAY

In the west mixing height 1200 to 2200 ft during the morning rising to 2100 to 3100 ft during the afternoon.  In the east mixing height below 1000 ft early rising to 1000 to 1700 ft by late morning rising to 2100 to 3100 ft during the afternoon.  Transport wind SSW to WSW at 6 - 12 mph during the morning becoming light and variable during the afternoon.  Surface wind light and variable.



WEDNESDAY

Mixing height below 1000 ft early rising to 1000 to 2000 ft by late morning rising to 1800 to 2800 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.



THURSDAY

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



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 Monday, November 1, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the SSW through W of SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.  No additional restrictions necessary.



Zone 633 - 638:

Avoid ignitions within 12 miles to the S through W of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the S 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.  Watch for shifting transport winds.



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

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/20101031/d4909815/attachment.html>