SMI Northeast (Smoke Management Instructions) Northeast Oregon Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS

SALEM FORESTRY WEATHER CENTER

OREGON DEPARTMENT OF FORESTRY



ISSUED: Friday, May 20, 2011       2:35 PM      Pete Parsons



Please Note:  A forecaster will be on duty this weekend.



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


SATURDAY

A weak upper-level trough is forecast to come onshore, along with a surface cold front, in the early morning.  The front should be strong enough to bring some showers and a slight chance of thundershowers into northeastern Oregon by the afternoon.  Light morning transport winds should increase from the west in the afternoon.  Since the cooler air will not arrive until late in the day, maximum temperatures should be able to climb to near normal.  Expect good daytime mixing.

OUTLOOK (SUNDAY-TUESDAY)

A moderately strong upper-level trough is forecast to bring mostly cloudy skies and a chance of showers Sunday and Monday.  Temperatures will cool to about 5 degrees below average.  Daytime mixing should be fair to good with northwesterly transport winds turning more north-northwesterly by Monday.

The upper-level trough is forecast to weaken by Tuesday, as it moves off to the east.  A cool but drier northwesterly flow aloft will slowly clear skies, with high temperatures edging up close to normal. Daytime mixing will remain fair to good.  North-northwesterly transport winds will slowly decrease during the day.



2.  DISPERSION



SATURDAY



Zone 630 and 632:

Mixing height below 500 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WNW to NNW at 8 - 12 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to NW to N at 4 - 8 mph during the afternoon and evening.

Zone 633 - 638:

Mixing height below 500 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to WNW to NNW at 6 - 10 mph during the afternoon and evening.



Surface wind light and variable and controlled by local terrain during the morning.  Surface wind increases to WNW to NNW at 56 - 76 mph during the afternoon then decreases to NW to N at 4 - 8 mph during the evening.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to N at 6 - 10 mph during the afternoon.  Surface wind light and variable during the morning becoming NW to N at 5 - 9 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NW to NNE at 5 - 9 mph during the morning becoming NNW to NNE at 9 - 15 mph during the afternoon.  Surface wind NW to N at 4 - 8 mph during the morning becoming NNW to NNE at 9 - 15 mph during the afternoon.



TUESDAY

Mixing height below 1000 ft early rising to 2500 to 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind NW to NNE at 6 - 10 mph.  Surface wind NW to NNE at 4 - 8 mph.



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 Saturday, May 21, 2011.

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



Zone 630 and 632:

Avoid ignitions within 10 miles to the SW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the SW through N in or near drainages leading to SSRAs.



Zone 633 - 638:

Avoid ignitions within 10 miles to the WNW through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 15 miles to the W through NNE in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.



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

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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