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 14, 2010       2:35 PM      Pete Parsons



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


    SATURDAY

A transitory upper-level ridge is forecast to move over Oregon with weak westerly flow aloft.  The surface thermal trough moves over eastern Oregon, along with the warmest surface temperatures.  Early morning inversions will give way to good afternoon mixing, with southerly transport winds east of the thermal trough, over the eastern zones, but becoming more westerly across the western zones.   Conditions should remain mostly dry except for a slight chance of afternoon mountain thunderstorms.

    OUTLOOK (SUNDAY-TUESDAY)

The flow aloft is forecast to turn southwesterly on Sunday, and southerly on Monday, as a weather system moves into northern California.  The air mass will become increasingly unstable with scattered showers and thunderstorms likely by Monday.  Afternoon mixing should be good with mostly southerly transport winds.  Onshore flow could penetrate into the western zones at times. The California system will continue to circulate moisture over the region Tuesday, for a chance of showers or thunderstorms.  Transport winds will likely turn more westerly, as the main low pressure system moves east of the state.


2.  DISPERSION



SATURDAY



Zone 630 and 632:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1000 - 2000 ft during the evening.



Transport wind S to SW at 6 - 12 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to NNW to NNE at 10 - 20 mph during the evening.



Surface wind S to SW at 6 - 12 mph during the morning.  Surface wind shifts to SW to WNW at 4 - 8 mph during the afternoon and shifts to NW to NNE at 6 - 12 mph during the evening.



Zone 633 - 638:

Mixing height below 1000 ft early rising above 5000 ft by late morning.  Mixing height lowers to 1000 - 2000 ft during the evening.



Transport wind SSE to SSW at 6 - 10 mph during the morning.  Transport wind becomes light and variable and controlled by local terrain during the afternoon then increases to SE to S at 4 - 8 mph during the evening.



Surface wind SE to SSW at 6 - 10 mph during the morning.  Surface wind becomes light and variable and controlled by local terrain during the afternoon and evening.



OUTLOOK:



SUNDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SE to S at 8 - 12 mph during the morning becoming S to SW at 10 - 18 mph during the afternoon.  Surface wind light and variable during the morning becoming SSE to SW at 5 - 9 mph during the afternoon.



MONDAY

Mixing height below 1000 ft early rising above 5000 ft by late morning and through the afternoon.  Transport wind SE to S at 8 - 12 mph during the morning becoming SSE to SSW at 10 - 20 mph during the afternoon.  Surface wind SE to S at 4 - 8 mph.



TUESDAY

Mixing height 1800 to 2800 ft during the morning rising to 3500 to 4500 ft during the afternoon.  Transport wind WSW to WNW at 8 - 12 mph during the morning becoming WSW to WNW at 10 - 20 mph during the afternoon.  Surface wind WSW to WNW at 6 - 10 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 15, 2010.

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



Zone 630 and 632:

Avoid ignitions within 12 miles in all directions of SSRAs.  For units that will smolder significantly through the night avoid burning within at least 20 miles in all directions of SSRAs.



Zone 633 - 638:

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



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

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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_northeast/attachments/20100514/28908376/attachment.html>