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PMS 437

Weather: Temp RH and Dew Point Tables

  1. Full Set PDF
  2. Elevation 0-500 feet (0-300 feet in Alaska), 30 in.
  3. Elevation 501-1,900 feet (301-1,700 feet in Alaska), 29 in.
  4. Elevation 1,901-3,900 feet (1,701-3,600 feet in Alaska), 27 in.
  5. Elevation 3,901-6,100 feet (3,601-5,700 feet in Alaska), 25 in.
  6. Elevation 6,101-8,500 feet (5,701-7,900 feet in Alaska), 23 in.
  7. Elevation 8,501-11,000 feet (above 7,900 feet in Alaska), 21 in.

The following tables calculate Dew Point and Relative Humidity based on the observed wet bulb and dry bulb temperatures and the elevation at the site of the observation. These can be calculated automatically using Wildland Fire RH Calculator Apps for iOS and Android available for free.

 

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Full Set PDF

Click here to obtain a full set of tables in PDF form. Another available tool is an online Dew Point calculator.

 

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Elevation 0-500 feet (0-300 feet in Alaska), 30 in.

 

Dry Bulb Temp 41-60

Psychometric Tables Pressure 30 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Tables Pressure 30 In Mercury, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 30 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 30 in, DB Temp 81-100

 

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Elevation 501-1,900 feet (301-1,700 feet in Alaska), 29 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 29 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 29 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 29 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 29 in, DB Temp 101-119

 

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Elevation 1,901-3,900 feet (1,701-3,600 feet in Alaska), 27 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 27 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 27 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 27 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Table, Pressure 27 in, DB Temp 101-119

 

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Elevation 3,901-6,100 feet (3,601-5,700 feet in Alaska), 25 in.

 

Dry Bulb Temp 41-60

Psychometric Table, Pressure 25 in, DB Temp 41-60

 

Dry Bulb Temp 61-80

Psychometric Table, Pressure 25 in, DB Temp 61-80

 

Dry Bulb Temp 81-100

Psychometric Table, Pressure 25 in, DB Temp 81-100

 

Dry Bulb Temp 101-119

Psychometric Tables Pressure 25 in, DB Temp 101-119

 

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Elevation 6,101-8,500 feet (5,701-7,900 feet in Alaska), 23 in.

 

Dry Bulb Temp 31-50

Psychometric Table, Pressure 23 in, DB Temp 31-50

 

Dry Bulb Temp 51-70

Psychometric Table, Pressure 23 in, DB Temp 51-70

 

Dry Bulb Temp 71-90

Psychometric Table, Pressure 23 in, DB Temp 71-90

 

Dry Bulb Temp 91-110

Psychometric Table, Pressure 23 in, DB Temp 91-109

 

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Elevation 8,501-11,000 feet (above 7,900 feet in Alaska), 21 in.

 

Dry Bulb Temp 31-50

Psychometric Table, Pressure 21 in, DB Temp 31-50

 

Dry Bulb Temp 51-70

Psychometric Table, Pressure 21 in, DB Temp 51-70

 

Dry Bulb Temp 71-90

Psychometric Table, Pressure 21 in, DB Temp 71-90

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NWCG Latest Announcements

RMC Safety Bulletin 26-001: Rhabdomyolysis in Wildland Firefighters

Date:  May 28, 2026
Questions? 
Please contact: Risk Management Committee

The Risk Management Committee (RMC) has issued Safety Bulletin 26-001: Rhabdomyolysis in Wildland Firefighters. Research from 2016 to 2025 shows that 88 cases of rhabdomyolysis (rhabdo) were reported. Analysis of reports from eSafety, the Safety Management Information System (SMIS), and the Wildland Fire Lessons Learned Center (LLC) indicates that rhabdo is common during this time of year due to Work Capacity Tests and contributing factors such as weather, hydration, nutrition, and medication or supplement use.

RMC issued this safety bulletin to raise awareness in the Wildland Fire Community, and to provide research findings and educational resources that support reducing future cases of rhabdo.

References:

NWCG Alerts

RMC Safety Bulletin 26-001: Rhabdomyolysis in Wildland Firefighters

NEW! D-110, Expanded Dispatch Recorder Course Available Now

Date:  May 15, 2026
Questions? 
Please contact: Dispatch Position and Curriculum Management Subcommittee

NWCG is pleased to announce the new D-110, Expanded Dispatch Recorder (Instructor-led) course is now available on the Wildland Fire Learning Portal (WFLP). Developed through the National Coordination System Committee, this course introduces the structure and function of expanded dispatch, the qualities of an effective dispatcher, and provides hands-on experience with the Interagency Resource Ordering Capability (IROC) system. 

The D-110, Expanded Dispatch Recorder course aligns with the competencies and duties outlined in the NWCG Incident Position Standards for Expanded Dispatch Recorder, PMS 350-59, and is designed for individuals with no prior experience who may be called upon to support dispatch operations.

References:

D-110, Expanded Dispatch Recorder (Instructor-Led)

Expanded Dispatch Recorder (EDRC), Position Page

NWCG Incident Position Standards for Expanded Dispatch Recorder, PMS 350-59

Wildland Fire Learning Portal

Leadership Committee IAP Flyer Now Available

Date:  May 8, 2026
Questions? 
Please contact: Leadership Committee

The NWCG Leadership Committee promotes and enables leadership development across the wildland fire service. The committee provides education, training opportunities, and support for leadership innovation and best practices throughout the community.

A new IAP flyer is now available on the committee website, offering an overview of the products, curriculum, and learning opportunities the Leadership Committee develops. This resource is ideal for posting in your office, sharing with new employees, or distributing through your incident management teams to engage new voices in the leadership journey and reinforce a culture of self‑reflection, development, and growth.

References:

Leadership Committee 2026 IAP Flyer

Incident Operations Subcommittee Updates the Next Generation Position Task Book for FFT1

Date:  May 7, 2026
Questions? 
Please contact: Incident Operations Subcommittee

The NWCG Incident Operations Subcommittee (IOSC) has updated the NWCG Position Task Book for Firefighter Type 1 (Squad Boss) (FFT1), PMS 311‑14. The FFT1 Position Task Book transitioned to the Next Generation (Next Gen PTB) format in June 2025 through the Incident Performance and Training Modernization effort. Since then, IOSC has received feedback from the wildland fire community regarding coding for one of the tasks. Task #13 has been updated to include the option of evaluation in a simulation.

See IOSC Memorandum 26‑01: Transition Plan for Implementation of Updates to the NWCG Position Task Book for Firefighter Type 1 (Squad Boss) (FFT1), PMS 311‑14 for more information.

References:

IOSC Memorandum 26-01: Transition Plan for Implementation of Updates to the NWCG Position Task Book for Firefighter Type 1

NWCG Firefighter Type 1 Squad Boss Position Page