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, June 18, 2010       2:35 PM      Pete Parsons



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



    SATURDAY


A broad and cool upper-level trough will remain over Washington and Oregon.  The center of an upper-level disturbance, embedded within the broad trough, will slowly sag southward along the Oregon coast.  The counterclockwise circulation around it will produce a moist and somewhat unstable south-southwesterly flow aloft over the state.  Skies will be partly to mostly cloudy with scattered showers and a chance of thundershowers.  High temperatures should cool to about 5-10 degrees below normal.  Daytime heating and cool air aloft will yield high afternoon mixing heights with transport winds turning onshore.

    OUTLOOK (SUNDAY-TUESDAY)

The center of the embedded upper-level disturbance will move over southwestern Oregon early Sunday and slowly progress eastward, to over southeastern Oregon, by Sunday evening.  Scattered showers will continue with a chance of thundershowers.  High temperatures will cool another 5-10 degrees, from Saturday, with generally northwesterly transport winds.

A weak and transitory upper-level ridge will move over western Oregon Monday and drift eastward, to over eastern Oregon, on Tuesday.  Showers will taper off Monday with progressively more sunshine helping temperatures recover to near normal by Tuesday.  Transport winds will decrease Monday and perhaps become light southerly by Tuesday. High afternoon mixing heights are expected during the outlook period.


2.  DISPERSION



SATURDAY

Mixing height below 1500 ft early rising to 3500 - 4500 ft by late morning.  Afternoon mixing height rises above 5000 ft then lowers to 1500 - 2500 ft during the evening.



Transport wind light and variable and controlled by local terrain during the morning.  Transport wind increases to NW to N 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 7 - 11 mph during the afternoon and evening.



OUTLOOK:



SUNDAY

Mixing height 1900 to 2900 ft during the morning rising to 4200 to 5000 ft during the afternoon.  Transport wind NNW to N at 8 - 14 mph.  Surface wind NW to N at 6 - 10 mph.



MONDAY

Mixing height 2200 to 3200 ft during the morning rising to 4500 to 5000 ft during the afternoon.  Transport wind light and variable during the morning becoming NW to N at 4 - 8 mph during the afternoon.  Surface wind light and variable.



TUESDAY

Mixing height below 1000 ft early rising to 4500 to 5000 ft by late morning and through the afternoon.  Transport wind SE to SSW at 6 - 10 mph.  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 Saturday, June 19, 2010.

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



Avoid ignitions within 12 miles to the WNW through NNE of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles to the WNW through NNE in or near drainages leading to SSRAs.



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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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