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: Monday, May 9, 2011       2:35 PM      Jim Little



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



    TUESDAY



An upper level ridge will lie southwest to northeast on an axis from about 900 miles west of Los Angeles to southern British Columbia early in the day on Tuesday.  The ridge will drift eastward during the day providing dry weather and sunshine to the region.  Transport winds will be light and generally north or north-northwesterly.  Afternoon heating should push mixing heights above 5000 feet for generally good smoke dispersal conditions.



    OUTLOOK (WEDNESDAY - FRIDAY)



The upper ridge continues east and the Pacific Northwest starts to come under the influence of an upper level low centered about 250 miles west of the Queen Charlotte Islands on Wednesday morning. A front associated with this low approaches the Oregon coastline during the day, but this side of the Cascades should see just increasing high clouds during the day.  Maximum mixing heights will remain high but transport winds will shift to southwesterly.



The upper level low rotates to about 350 miles west of Vancouver Island by Thursday. The remains of a front will drag through for some light rain early then expect partly cloudy skies.  Smoke dispersal conditions should remain good.  Transport winds will be generally southerly.



Friday sees the upper low about 350 miles west of the mouth of the Columbia River.  Wind flow aloft will be southerly.  Little change is expected for this area with high maximum mixing heights and a generally southerly transport wind.







2.  DISPERSION



TUESDAY



Zone 630 and 632:

Mixing height 4200 - 5000 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 NNE at 5 - 9 mph.



Surface wind NW to NNE at 6 - 10 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.

Zone 633 - 638:

Mixing height 3700 - 4700 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 N at 8 - 14 mph throughout the day.



Surface wind NW to N at 8 - 14 mph during the morning and afternoon.  Surface wind becomes light and variable and controlled by local terrain during the evening.



OUTLOOK:



WEDNESDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SSE to SSW at 7 - 13 mph during the morning becoming S to SSW at 12 - 24 mph during the afternoon.  Surface wind SSE to SSW at 6 - 10 mph during the morning becoming S to SSW at 10 - 16 mph during the afternoon.



THURSDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SSE to SSW at 4 - 8 mph.  Surface wind light and variable.



FRIDAY

Mixing height 3200 to 4200 ft during the morning rising above 5000 ft during the afternoon.  Transport wind S to SW at 5 - 9 mph during the morning becoming SE to S at 4 - 8 mph during the afternoon.  Surface wind S to SW at 4 - 8 mph during the morning becoming SE to S at 4 - 8 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 Tuesday, May 10, 2011.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Verify transport winds away from SSRAs if burning in any other direction.  Complete ignitions by 4:00pm.



Zone 633 - 638:

Avoid ignitions within 12 miles to the NW through NE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.  Complete ignitions by 4:00pm.



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

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

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