SMI South Central (Smoke Management Instructions) South Central Smoke Management Instructions

[ODF Smoke Management Instructions]

SMOKE MANAGEMENT FORECAST AND INSTRUCTIONS
SALEM FORESTRY WEATHER CENTER
OREGON DEPARTMENT OF FORESTRY

ISSUED: Monday, May 24, 2010       2:40 PM      Jim Little

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

    TUESDAY

An upper level low remains about 6000 miles west of Vancouver Island on Tuesday.  Counter clockwise flow around that low drives a Pacific weather system mainly into northern California but rain spreads in from the southwest during the afternoon.  Mixing heights will be high enough for good smoke dispersal conditions.  Transport winds will be generally southerly.

    OUTLOOK (WEDNESDAY-FRIDAY)

The upper low elongates on a NW/SE axis but remains offshore on Wednesday.   Upper flow will be from the south or southeast across Oregon.  There will be enough moisture for scattered showers.  By Thursday the upper low consolidates off the southwest Oregon coast.  Moisture continues to stream around the low and spread south to north across the region.  The low finally drifts east and a drier northerly flow sets up across the region.  Expect dry weather, and with some sunshine, warmer temperatures.  Smoke dispersal conditions should remain fair to good throughout the outlook period.

2.  DISPERSION

TUESDAY
Mixing height 3000 - 4000 ft during the morning.  Mixing height rises to above 5000 ft during the afternoon then lowers to 2400 - 3400 ft during the evening.

Transport wind S to SW at 10 - 18 mph during the morning and afternoon.  Transport wind increases to S to SSW at 13 - 25 mph during the evening.

Surface wind S to SW at 8 - 14 mph.

OUTLOOK:

WEDNESDAY
Mixing height 2100 - 3100 ft during the morning rising above 5000 ft during the afternoon.  Transport wind SSW to SW at 12 - 22 mph.  Surface wind S to SW at 6 - 12 mph during the morning becoming SW to WSW at 8 - 12 mph during the afternoon.

THURSDAY
Mixing height below 1000 ft early rising to 2500 - 3500 ft by late morning rising above 5000 ft during the afternoon.  Transport wind SSW to WSW at 10 - 20 mph.  Surface wind SSW to WSW at 9 - 15 mph.

FRIDAY
Mixing height 3000 - 4000 ft during the morning rising above 5000 ft during the afternoon.  Transport wind NW to N at 15 - 29 mph.  Surface wind NW to N at 12 - 24 mph.

3.  BURNING INSTRUCTIONS FOR ZONES 624 AND 625 INCLUDING THE WALKER
    RANGE PORTION OF ZONE 624
This instruction is valid for burning conducted on Tuesday, May 25, 2010.
==================================================================

Avoid ignitions within 12 miles to the S through SW of SSRAs.  No additional restrictions necessary.

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


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://omls.oregon.gov/pipermail/smi_south_central/attachments/20100524/9a12f7fe/attachment.html>