Skip to main content

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.

Return to Top

Full Set PDF

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

Return to Top

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

Return to Top

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

Return to Top

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

Return to Top

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

Return to Top

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

Return to Top

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

Page Last Modified / Reviewed:

Print PDF

NWCG Latest Announcements

2024 Week of Remembrance

Date: June 27, 2024
Contact: 6 Minutes for Safety Subcommittee 

As we approach the 2024 Week of Remembrance (WOR), June 30 to July 6, we dedicate this time to thoughtfully reviewing and recognizing the events of the 2018 Mendocino Complex. As such, this year’s theme of “Learning From the Mendocino Complex” embodies a longstanding hallmark of WOR, honoring through learning.

Throughout the week, our energy will be directed toward fostering generative conversations in briefing rooms and at tailgates.

References:

6 Minutes for Safety - 2024 Week of Remembrance

Wildland Fire Lessons Learned Center

Updated NWCG Wildland Fire Risk and Complexity Assessment, PMS 236

Date: June 24, 2024
Contact: Incident and Position Standards Committee 

The June 2024 update of the NWCG Wildland Fire Risk and Complexity Assessment, PMS 236, is now available to meet the current needs for incident management typing.

The NWCG Wildland Fire Risk and Complexity Assessment should be used to evaluate firefighter safety issues, assess risk, and identify the appropriate incident management organization based on incident complexity. Assessing risk, determining incident complexity, and identifying an appropriate incident management organization is a subjective process based on examining a combination of indicators or factors, which can change over time.

References:

NWCG Wildland Fire Risk and Complexity Assessment, PMS 236

Operations Branch Director (OPBD) Next Gen PTB Available

Date: June 10, 2024
Contact: NWCG Feedback 

The NWCG Position Task Book for Operations Branch Director (OPBD), PMS 311-109 is now available for use within the OPBD position qualification pathway. As part of the transition to Complex Incident Management (CIM), the OPBD Next Gen PTB was developed and the position qualification pathway updated.

More information about the Next Gen PTB format can be found on the NWCG Position Task Book webpage.

References:

Operations Branch Director Position Page

Operations Branch Director Next Gen PTB

NWCG Position Task Books

Updated NWCG Standards for Interagency Incident Business Management, PMS 902

Date: June 5, 2024
Contact: NWCG Incident Business Committee 

The 2024 revision of the NWCG Standards for Interagency Incident Business Management, PMS 902 is now available. The uniform application of interagency incident business management standards is critical to interagency fire operations. PMS 902 assists NWCG agencies in constructively working together to provide effective execution of each agency's incident business management program.

References:

PMS 902