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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

Modified / Reviewed:

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NWCG Latest Announcements

NWCG Equipment Technology Committee Releases Safety Warning: 24-001 Stihl Chainsaw Toolless Fuel Cap Spill Prevention

Date: November 14, 2024
Contact: Equipment Technology Committee

The Equipment Technology Committee (ETC) has released Safety Warning: 24-001 Stihl Chainsaw Toolless Fuel Cap Spill Prevention. Misaligned toolless fuel caps on Stihl chainsaws have led to recurring fuel spillage, fuel ignition, and burn injuries during wildland fire management operations.

This Safety Warning is intended to highlight the details and recommended procedures for the installation of a Stihl chainsaw toolless fuel cap, as well as how to identify and correct a misaligned, damaged, or broken fuel cap to help prevent fuel spillage.

References:

NWCG Safety Warning: 24-001 Stihl Chainsaw Toolless Fuel Cap Spill Prevention

Advertencia de equipos 24-001: Prevención de derrames de la tapa de combustible sin herramientas de la motosierra Stihl

NWCG Alerts

The Incident Position Standards and Next Generation Position Task Book are now available for Equipment Time Recorder (EQTR)

Date: November 13, 2024
Contact: Incident Business Committee

NWCG is excited to announce that the NWCG Incident Position Standards for Equipment Time Recorder, PMS 350-51 and NWCG Position Task Book for Equipment Time Recorder (EQTR), PMS 311-51 are now available.

The Performance Support Package, which for EQTR, includes the Incident Position Standards and Next Generation Position Task Book were developed through the Incident Performance and Training Modernization (IPTM) effort. The Performance Support Package will support trainees, those qualified in the position, and evaluators.

References:

NWCG Equipment Time Recorder Position Page

NWCG Incident Position Standards for Equipment Time Recorder, PMS 350-51

NWCG Position Task Book for Equipment Time Recorder (EQTR), PMS 311-51

The Incident Position Standards and Next Generation Position Task Book are now available for Personnel Time Recorder (PTRC)

Date: November 13, 2024
Contact: Incident Business Committee

NWCG is excited to announce that the NWCG Incident Position Standards for Personnel Time Recorder, PMS 350-53 and NWCG Position Task Book for Personnel Time Recorder (PTRC), PMS 311-53 are now available.

The Performance Support Package, which for PTRC, includes the Incident Position Standards and Next Generation Position Task Book were developed through the Incident Performance and Training Modernization (IPTM) effort. The Performance Support Package will support trainees, those qualified in the position, and evaluators.

References:

NWCG Personnel Time Recorder Position Page

NWCG Incident Position Standards for Personnel Time Recorder, PMS 350-53

NWCG Position Task Book for Personnel Time Recorder (PTRC), PMS 311-53

NWCG Risk Management Committee Releases Safety Bulletin: 24-001 Use of Respirators on Wildland Fires

Date: November 7, 2024
Contact: Risk Management Committee

The Risk Management Committee (RMC) has released Safety Bulletin: 24-001 Use of Respirators on Wildland Fires. As wildland fire respirators are available through several established vendors, wildland fire personnel need to understand regulations and limitations of respirator use in the workplace.

Safety Bulletin 24-001 outlines the following topics regarding respirator use for wildland fires:

  • Requirements for Respirator Use
  • Voluntary Respirator Use
  • Current Respirator Options
  • Unknown Risks of Respirator Use

This bulletin also provides mitigation recommendations to help reduce smoke exposure for wildland firefighting efforts.

References:

NWCG Safety Bulletin: 24-001 Use of Respirators on Wildland Fires

NWCG Smoke Management Guide for Prescribed Fire, PMS 420-3

VIDEO: Protecting Wildfire Personnel from Smoke - How Incident Management Teams Address Smokes Risks

VIDEO: Smoke, Knowing the Risks