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: Tuesday, November 17, 2009       2:35 PM      Jim Little

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

A deep upper trough in the northern Gulf of Alaska will continue to influence Pacific Northwest weather through the week.  Weather systems rotating around this low will move into the Pacific Northwest, but mostly dissipate as they move past the Cascades.  Thus expect a generally dry second half of this week.  Mixing heights should be favorable and transport winds generally southerly on Wednesday.

    OUTLOOK (THURSDAY-SATURDAY)

On Thursday surface high pressure develops with some atmospheric stabilization.  Some light rain, however, is possible in north central Oregon.  Dry weather with good mixing heights are likely for Friday and some light rain is likely for Saturday as a disturbance moves through.

2.  DISPERSION

WEDNESDAY

Zone 630 and 632:
Mixing height 2000 - 3000 ft during the morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers to 2800 - 3800 ft during the evening.

Transport wind SW to WSW at 12 - 24 mph during the morning.  Transport wind increases to S to SW at 18 - 32 mph during the afternoon and increases to SSW to SW at 23 - 41 mph during the evening.

Surface wind SSW to SW at 8 - 12 mph during the morning.  Surface wind increases to S to SW at 10 - 18 mph during the afternoon and evening.

Zone 633 - 638:
Mixing height 1000 - 1600 ft during the morning.  Afternoon and evening mixing rises to 3500 - 4500 ft.

Transport wind SSW to SW at 8 - 14 mph during the morning.  Transport wind increases to S to SSW at 10 - 22 mph during the afternoon and evening.

Surface wind S to SW at 6 - 12 mph.

OUTLOOK:

THURSDAY
Mixing height 2100 to 3100 ft throughout the day.  In the west transport wind SSW to SW at 22 - 40 mph.  In the east transport wind S to SSW at 16 - 30 mph.  Surface wind S to SSW at 10 - 22 mph.

FRIDAY
Mixing height 1500 to 2500 ft during the morning rising to 4000 to 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

SATURDAY
Mixing height 2200 to 3200 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind SW to WNW at 4 - 8 mph during the morning becoming light and variable during the afternoon.  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 Wednesday, November 18, 2009.
    ==================================================================

Zone 630 and 632:
Avoid ignitions within 12 miles to the S through WSW 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 SSE through WSW 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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