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, May 8, 2011       2:35 PM      Jim Little



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

   MONDAY

A very deep (for this time of year) upper low is centered over the Oregon/Idaho/Nevada border early in the day.  It pulls slowly south during the day and by evening is centered over Wendover, Utah.  As the low moves away weak upper ridging builds offshore.  Scattered light showers are possible through much of the day.  Maximum mixing heights should be near 4000 feet for fair to good smoke dispersal conditions.



   EXTENDED OUTLOOK (TUESDAY - THURSDAY)



Tuesday the ridge builds and moves over the region for dry weather.  Surface temperatures should warm to two to four degrees above average and the warmer daytime conditions should help to keep afternoon mixing heights high for good smoke dispersal conditions.



On Wednesday the ridge moves east as yet another deep upper level low moves slowly southeastward in the Gulf of Alaska and begins to affect the Pacific Northwest.  This low will be a major weather feature for several days.  Wednesday, however, will only see an increase in cloudiness through the day. Temperatures will be from 5 to 8 degrees above average.  Models indicate a fair amount of shear in the transport winds.  Winds will be generally northwesterly at low levels backing to southwesterly with height.  This could limit plume growth and inhibit smoke dispersal conditions.



Friday sees a broad upper low centered about 200 miles west of Vancouver Island with southwesterly flow aloft over the region. Expect a few scattered showers and temperatures two to five degrees below average.  Mixing heights will climb to 5000 feet or better for good smoke dispersal conditions.



2.  DISPERSION



MONDAY



Zone 630 and 632:

Mixing height 2800 - 3800 ft during the morning.  Afternoon and evening mixing rises to 3500 - 4500 ft.



Transport wind NW to N at 10 - 20 mph during the morning.  Transport wind increases to NNW to N at 16 - 30 mph during the afternoon and evening.



Surface wind NW to N at 10 - 18 mph throughout the day.

Zone 633 - 638:

Mixing height 2300 - 3300 ft during the morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers to 2000 - 3000 ft during the evening.



Transport wind NW to NNW at 10 - 22 mph throughout the day.



Surface wind NW to NNW at 10 - 18 mph.



OUTLOOK:



TUESDAY

In the west mixing height below 1000 ft early rising to 3100 to 4100 ft by late morning rising above 5000 ft during the afternoon.  In the east mixing height 3100 to 4100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to N at 6 - 12 mph.  Surface wind WNW to NNW at 4 - 8 mph during the morning becoming NNW to NNE at 6 - 12 mph during the afternoon.



WEDNESDAY

Mixing height below 1000 ft early rising to 3000 to 4000 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSE to SSW at 4 - 8 mph.  Surface wind SSE to SSW at 4 - 8 mph.



THURSDAY

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 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.



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, May 9, 2011.

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



Zone 630 and 632:

Avoid ignitions within 12 miles to the NW through N of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the NW through N in or near drainages leading to SSRAs.  Care needed in selecting units as smoke will likely fumigate along the ground in wind prone areas.



Zone 633 - 638:

Avoid ignitions within 12 miles to the WNW through NNE of SSRAs.  No additional restrictions necessary.



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

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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