National Weather Service United States Department of Commerce


Thank you for attending one of our Skywarn Spotter Training Sessions! We appreciate your assistance in helping protect life and property across southeast Arizona. The material on this page is for your reference.


NEW!   Spring 2024 Skywarn Snapshot Newsletter


Auto-generated spotter database update requests are being emailed out. Please keep an eye on your inbox and update your information as necessary. Remember: If you are also a licensed HAM radio operator or a CoCoRaHS reporter, you may fill out this form again, but select either Amateur Radio or CoCoRaHS as your NWS affiliation. There is not currently a way to do this all at once, though this function may be available in the future. If you have problems or questions, please contact

Thank you!


New Spotters for Southeast Arizona

Please be sure to fill out this Spotter Sign-up Form so that we can keep in touch.


All Spotters

If your spotter information ever changes, please let us know by filling out this Form. Be sure to use the email address you signed up with so we don't have a duplicate of your information. If your email address is the information that has changed, please email This database only functions with the use of a valid email address.

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Reporting Criteria

Weather Phenomena

Please Report the following to NWS Tucson:


Gusts of 50 mph or more (measured), any wind-related damage


The size of dimes (3/4" diameter) or larger; large amounts of small hail; hail covering a roadway and causing a hazard

Heavy Rain

Rainfall >0.50” in less than 1 hr (immediate reports only please)

Flash Flooding

Road closures due to flooding, flooding in buildings, water 8” deep flowing across a road causing a hazard


Tornadoes or funnel clouds


A wall of dust, dust channel causing a hazard

Winter Weather

1” of snow accumulation on roadways <5000 ft elevation;

2” or more snow accumulation >5000 ft elevation.

Low Visibility

Less than 1 mile for any reason (dust, fog, snow, smoke)


Any other weather-related damage, injury or fatality.



Ways to Make a Storm Report

Spotter Hotline: Please see the Spotter Information Sheet you received in class for Hotline information. Alternately, the Hotline was provided during your virtual training class.

Please call with your spotter number ready. Be sure to report what you saw, when you saw it, where you saw it and how long it lasted (if applicable). Try to keep your call short if possible.

X (Twitter): @NWSTucson – Please post to us directly or use #azwx  

Facebook: US National Weather Service Tucson


Online Reporting

Wind Speed and Hail Size Estimation Guide


Remember to only make a report when it is safe to do so!


Additional Spotter Resources

NWS Tucson Skywarn Training Schedule

NWS Tucson Spotter Training YouTube Refresher Video

NWS Tucson Spotter Training Story Maps   (Part 1)    (Part 2)

National Skywarn Training (Optional): COMET: MetEd

NWS Nashville Weather 101 Webinars

Weather Spotter's Field Guide

Weather Spotter's Field Guide (Spanish)

NWS Interactive Cloud Chart

Safety and Preparedness Information


Previous Spotter Snapshot Newsletters

Fall 2023 Skywarn Snapshot Newsletter