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Weather Graphics is your source for weather forecasting tools, software, and books.


"Thank you for actually penning these books. They are a wonderful review of the concepts without the excessive (but necessary) amount of math behind them. I wish they had been recommended as supplements in both my undergrad and graduate years."

— Josh Tobias, 2017

  "I have used Digital Atmosphere for quite sometime and consider it to be one of the most straightforward, comprehensive, and operationally useful programs on my server. I have found it to be invaluable for my day-to-day analyses and forecasting as well as my ongoing research. Tim is also extremely helpful and absolutely indispensable when it comes to locating scripts, the best datasets, and even professional contacts to help make any organization as productive as possible."

Chris Robbins, iWeatherNet

"The quality of your products is second to none."

— C. Brian Batey

"Thanks Tim for your quick response (we like that at FedEx) about our Professional Versions! As we're a 24/7 operation, we're look forward to augmenting our present weather system with Digital Atmosphere."

— Mel Bradley, FedEx Operations

"Wow. Your books are incredibly technical and useful. I consider myself a very amateur weather watcher and feel that I am already ahead of the curve. Thank you."

— Terry W. Taylor

"The NEXRAD support is truly awesome and easy to use – and the ‘other’ feature just really tops it off. This is about my sixth email tonight – the other five being to other spotters in the area telling them they just have to download Digital Atmosphere and give it a serious going over."

— David Cashion

"I'm really looking forward to the next phase of Digital Atmosphere Workstation. I'm sure it will be as excellent as all your other products."

— Simon Keeling
Weather Consultancy Services, UK

"I run and manage a number of festival type events and Digital Atmosphere is able to produce charts that I can use for normal weather forecasting with a fair degree of accuracy and in particular wind speed and direction that is crucial to many of events."

— Robert Connolly, GI7IVX

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"I am very impressed with what you have done. I have already shown several people at work your site. I plan on talking to our MIC [Meteorologist In Charge] soon to see if we can get Digital Atmosphere in the office to complement/supplement AWIPS."

— Ken Simosko, NWS, Pocatello

"This new version is even better than the older version which was awesome! Your programming skills and met knowledge amaze me!"

— Chris Kincaid

Weather plotting charts

Listed here are a number of key diagrams, plotting charts, and other graphics scanned by Weather Graphics and provided as a courtesy for forecasters. The PDF link provides the diagram in a letter-sized document. To print to 11x17" or other sizes, use the Page Handling options in Adobe Reader. Nearly all of these graphics are the work of the federal government and no copyright is claimed. We will likely add additional charts from our collection in the near future.

Thermodynamic Diagrams

Skew-T log P diagram, basic. This is the primary, essential Skew-T diagram.
SOURCE: U.S. Air Force DOD WPC 9-16 (1987).

JPG: wpc-916.jpg

PDF: wpc-916.pdf
Skew-T log P diagram, Compact
SOURCE: U.S. Air Force DOD WPC 9-16-1 (1978).

JPG: wpc9161.jpg

PDF: wpc9161.pdf
Skew-T log P diagram, with refractivity overprint
SOURCE: U.S. Air Force DOD WPC 9-16-2 (1968).

JPG: wpc9162.jpg

PDF: wpc9162.pdf
Skew-T log P diagram, 1000-400 mb (low level). This is a chart that is useful for working with inversions and performing accurate analysis of LCLs and parcels.
SOURCE: U.S. Air Force DOD WPC 9-16A (1977).

JPG: wpc916a.jpg

PDF: wpc916a.pdf
Skew-T log P diagram, formfeed version. This was presumably used for dot-matrix or teleprinter output from centers or from local software.
SOURCE: Unknown; probably U.S. Weather Bureau late 1960s.

JPG: skew_formfeed.jpg

PDF: skew_formfeed.pdf
Tephigram. This is one of the other significant types of thermodynamic diagrams.
SOURCE: University of Virginia & NSF Grant ATM 74-21701 (1978).

JPG: tephigram_trop.jpg

PDF: tephigram_trop.pdf
Arowagram. This type of thermodynamic diagram was preferred by the U.S. Navy in the 1950s and was useful for calculating refraction.
SOURCE: ATA Chart 17, reproduction of U.S. Navy diagram OPNAV FORM 3140-3 (aprx. 1950).

JPG: arowagram.jpg

PDF: arowagram.pdf
Skew-T log P diagram. This is essentially an ATA reproduction of WPC 9-16.
SOURCE: ATA Chart 20 (aprx. 1950).

JPG: ata20.jpg

PDF: ata20.pdf
Pastagram. The pastagram was introduced by John C. Bellamy in 1945. It is essentially a skew-T diagram but the upper part is an emagram.
SOURCE: Weathermasters Form JCB 460106 (1946), presumably for university or U.S. Weather Bureau use.
SOURCE (Literature): Bellamy, John C., 1945: The use of pressure altitude and altimeter corrections in meteorology. J. Meteor., 2, 1-79.

JPG: pastagram.jpg

PDF: pastagram.pdf
Pseudoadiabatic diagram. Basically an emagram.
SOURCE: USWB Chart D-29 (aprx 1958-1960).

JPG: pseudoadiabatic.jpg

PDF: pseudoadiabatic.pdf

Vector Diagrams

Maneuvering board. Can also be used as a hodograph.
SOURCE: U.S. Navy H.O. 2665-10 (1970).

JPG: usn_ho-2665-10_1970.jpg

PDF: usn_ho-2665-10_1970.pdf

Weather Plotting Charts

United States

JPG: uswb_15p91_1963.jpg

PDF: uswb_15p91_1963.pdf
United States (compact)

JPG: uswb_15p93_1965.jpg

PDF: uswb_15p93_1965.pdf
Southeast United States

JPG: uswb_10p94_1965.jpg

PDF: uswb_10p94_1965.pdf
Daily Weather Map

JPG: wpc-6-20-1_us_1969.jpg

PDF: wpc-6-20-1_us_1969.pdf
United States upper air & synoptic plotting chart (1974)

JPG: wpc-7-15-5_1974.jpg

PDF: wpc-7-15-5_1974.pdf
South Central United States (1952)

JPG: wpc-faws4_1952.jpg

PDF: wpc-faws4_1952.pdf

Station Locator Charts

Weather Plotting Chart: United States

JPG: slc-1.pdf

PDF: slc-1.pdf
Weather Plotting Chart: Southwest Asia

JPG: slc-5.jpg

PDF: slc-5.pdf


U.S. Tornadoes 1930-74 (Theodore Fujita)

JPG: fujita_us_tor.jpg

PDF: fujita_us_tor.pdf
Norman radar worksheet, 1963

JPG: koun_radar_1963.jpg

PDF: koun_radar_1963.pdf