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Surface Fire: Effective Windspeed EWS

EWS integrates the effect of winds and slope on a surface fire behavior estimate based on the fuel model the fire is expected to be burning in. These tables produce the resulting EWS when winds are blowing upslope.

For downslope and cross-slope winds, use the zero (0) mph row in the Midflame Windspeed (MFWS) column to estimate the Slope Equivalent Windspeed. It can be used as the MFWS in the lookup tables to produce slope vector fire behavior estimates for use in the Vectoring Fire Behavior section.

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Effective Windspeed Adjustment Table. Use this series of tables to estimate windspeed when wind is blowing upslope. Factors include midflame windspeed, and slope. Using a midflame windspeed of zero (0) and the appropriate slope will allow user to estimate the slope equivalent windspeed.

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NWCG Latest Announcements

WFSTAR 2025 Core Component Module Package and 2024 Fire Year in Review Now Available

Date: March 14, 2025
Questions?  Please contact:
Joe Schindel at mschindel@blm.gov
 

The 2025 Core Component Module Package for RT-130, Wildland Fire Safety Training Annual Refresher (WFSTAR) and the 2024 Fire Year in Review are now available on the NWCG website. The 2025 Core Component Module Package provides all content needed to deliver RT-130.

References:

2025 Core Component Module Package

2024 Fire Year in Review Module

NEW! NWCG Wildland Urban Interface Mitigation Field Guide, PMS 053

Date: March 12, 2025
Contact: Wildland Urban Interface Mitigation Committee

The NWCG Wildland Urban Interface Mitigation Field Guide, PMS 053 provides mitigation practitioners at all experience levels with recommendations on the most effective and efficient ways to accomplish mitigation work in communities at risk to wildfire damage or destruction. The content in this guide was written in coordination with the NWCG Standards for Mitigation in the Wildland Urban Interface, PMS 052.

References:

NWCG Wildland Urban Interface Mitigation Field Guide, PMS 053 

Updated, NWCG Standards for Wildland Fire Module Operations, PMS 430

Date: March 11, 2025
Contact: Fire Use Subcommittee
Wildland Fire Module Unit

The NWCG Standards for Wildland Fire Module Operations, PMS 430 standardizes procedures and expectations for Wildland Fire Modules (WFMs). These standards are to be used by staff, supervisors, specialists, and technicians for planning, administering, and conducting WFM operations. These standards will also be used as a measure of WFM qualifications, capabilities, and expected performance, for both Type 1 and Type 2 WFMs.

References:

NWCG Standards for Wildland Fire Module Operations, PMS 430

NEW! NWCG Standards for Airtanker Operations, PMS 514

Date: March 7, 2025
Contact: National Interagency Aviation Committee

The NWCG Standards for Airtanker Operations, PMS 514 establishes the standards for dispatching, utilizing, and coordinating airtankers on interagency wildland fires. These standards should be used in conjunction with the NWCG Standards for Aerial Supervision (SAS), PMS 505, NWCG Standards for Airtanker Base Operations (SABO), PMS 508, and any applicable agency plans.

References:

NWCG Standards for Airtanker Operations, PMS 514