SMI South Central (Smoke Management Instructions) South Central 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       2:40 PM      Jim Little

1.  DISCUSSION AND FORECAST FOR SOUTH CENTRAL OREGON ZONES 624 AND 625

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.  Any rain should stay to the north and west of the region.  Dry weather with good mixing heights are likely for Friday and some light rain is likely for Saturday as a disturbance moves through.

    OUTLOOK (THURSDAY - SATURDAY):


2.  DISPERSION

WEDNESDAY
Mixing height 3000 - 4000 ft during the morning.  Afternoon mixing height rises to 3500 - 4500 ft then lowers to 2600 - 3600 ft during the evening.

Transport wind SW to WSW at 10 - 20 mph during the morning.  Transport wind increases to SSW to SW at 13 - 25 mph during the afternoon and increases to SSW to SW at 19 - 33 mph during the evening.

Surface wind SSW to WSW at 6 - 12 mph.

OUTLOOK:

THURSDAY
Mixing height 2300 - 3300 ft during the morning rising to 4000 - 5000 ft during the afternoon.  Transport wind SSW to SW at 20 - 34 mph.  Surface wind SSW to SW at 9 - 15 mph.

FRIDAY
Mixing height 2200 - 3200 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind SE to SSW at 6 - 12 mph during the morning becoming light and variable during the afternoon.  Surface wind SE to SSW at 6 - 10 mph during the morning becoming light and variable during the afternoon.

SATURDAY
Mixing height 2200 - 3200 ft during the morning rising to 4500 - 5000 ft during the afternoon.  Transport wind light and variable.  Surface wind light and variable.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Wednesday, November 18, 2009.
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Avoid ignitions within 12 miles to the SSW through WSW of SSRAs.  No additional restrictions necessary.

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4.  SPECIAL NOTE:

    The smoke management forecaster is available at (503)
    945-7401.  The smoke management forecaster is available
    to discuss specific burns.  The duty forecaster phone
    number is (503) 945-7401. Please call this number and
    not individual's numbers to discuss daily burning. Please
    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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