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PMS 437

Crown Fire References

NWCG Committee Realignment Website Updates: Content will continue to be updated over the coming days as we work through final reviews and adjustments, and all publications and products are currently under revision.

Alexander, M. E., Help with making crown fire hazard assessments, Canadian Forest Service Publications, 1988.

Anderson, H. E., Aids to determining fuel models for estimating fire behavior, U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1982.

Andrews, Patricia L., Heinsch, Faith Ann, Schelvan, Luke, How to generate and interpret fire characteristics charts for surface and crown fire behavior, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2011.

Bishop, Jim, Technical background of the FireLine Assessment MEthod (FLAME),  U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2007.

Cruz, M.G. and M.E. Alexander, Assessing crown fire potential in coniferous forests of western North America: a critique of current approaches and recent simulation studies, International Journal of Wildland Fire, 2010.

Scott, Joe H., Comparison of crown fire modeling systems used in three fire management applications, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2006.

Scott, Joe H.; Reinhardt, Elizabeth D.,  Assessing crown fire potential by linking models of surface and crown fire behavior, U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2001.

Rothermel, Richard C., How to predict the spread and intensity of forest and range fires, U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, 1983.

Rothermel, Richard C., Predicting behavior and size of crown fires in the northern Rocky Mountains, U.S. Department of Agriculture, Forest Service, Intermountain Research Station, 1991.

Van Wagner, C. E., Conditions for the start and spread of crown fire. Can. J. For. Res., 1997.

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NWCG Latest Announcements

LMC Equipment Bulletin 26-001: Aquatic Invasive Species – Seasonal Reminder for Mussels

Date:  July 30, 2026
Questions? 
Please contact: Equipment and Technology Subcommittee

The Logistics and Equipment Management Committee (LMC) issued Equipment Bulletin 26-001: Aquatic Invasive Species - Seasonal Reminder for Mussels, reminding the wildland fire community that aquatic mussels continue to be a problem. Mussels rapidly colonize hard and soft surfaces, including aquatic plants and fire equipment, clogging pipes, fouling motors, disrupting water systems, and impacting native species.

To help prevent their spread, fire personnel must follow the decontamination procedures outlined in the NWCG Guide to Preventing Aquatic Invasive Species Transport by Wildland Fire Operations, PMS 444. Additionally, report any sightings immediately to your Lead Resource Advisor and include clear, close-up photos (with a pen or your hand for size reference) and location details.”

Read the complete LMC Equipment Bulletin 26-001, to learn more. 

References:

NWCG Alerts

LMC Equipment Bulletin 26-001: Aquatic Invasive Species - Seasonal Reminder for Mussels

NWCG Guide to Preventing Aquatic Invasive Species Transport by Wildland Fire Operations, PMS 444

Intermediate Faller (FAL2) Position Task Book Update

Date:  July 24, 2026
Questions? 
Please contact: Tree Felling Subcommittee

NWCG Operations Management Committee (OMC) has issued an update to the NWCG Position Task Book for Intermediate Faller (FAL2), PMS 311-91. To ensure clarity for both trainees and evaluators, the updated FAL2 Position Task Book (PTB) explicitly states who is authorized to sign off on your tasks:

“Evaluators must be qualified as a FAL2, or an Advanced Faller (FAL1).”

If you are currently working out of a previously published version of the FAL2 PTB, you do not need to restart. However, OMC highly encourages you to take the following step to prevent any confusion in the field:

  • Print and replace the updated evaluator information page (page 2) in your current physical PTB.

References:

Intermediate Faller (FAL2) Position Page

RMC Memo 26-01: Transition Plan for Implementing Updates to Intermediate Faller (FAL2) Position Qualifications

NWCG Position Task Book for Intermediate Faller (FAL2), PMS 311-91

Equipment Advisory 26-001: Potential Front Driveline Joint Failure on 2018 and Earlier Ram Pickups

Date:  July 10, 2026
Questions? 
Please contact: Equipment and Technology Subcommittee

The Logistics/Equipment Management Committee (LMC) has released Equipment Advisory 26-001: Potential Front Driveline Joint Failure on 2018 and Earlier Ram Pickups. This advisory highlights multiple U.S. Forest Service regions reporting front driveline joint failure incidents.

This advisory recommends firefighters and fire managers to: 

  • Follow all Ram-issued inspection, maintenance, and service guidance for front driveline joints. 
  • Consider installing a driveline loop. 
  • Coordinate with fleet managers and service providers to determine the most appropriate driveline loop kit for each pickup.

For further details, please refer to the complete advisory.

References:

Equipment Advisory 26-001: Potential Front Driveline Joint Failure on 2018 and Earlier Ram Pickups

Technical Service Bulletin: 03-002-21

NEW! NWCG Standard Operating Procedures, PMS 900

Date:  July 9, 2026
Questions? 
Please contact: NWCG Staff

NWCG is excited to announce the publication of the NWCG Standard Operating Procedures, PMS 900.

The new publication establishes general, consistent, and uniform standards for conducting business with the National Wildfire Coordinating Group.

References:

NWCG Standard Operating Procedures, PMS 900