National Weather Service - Skywarn Weather Spotter
What to Report
Water that covers roads or threatens property
- High Winds
40mph - small trees sway
50mph - large trees sway
60mph - smaller tree branches break - up to 1 inch diameter
70mph - large tree branches break - 1 to 3 inches diameter
80mph - tree uprooted
100mph - large tree trunks snapped
- Blowing Dust
Reduced visibilities to one-half mile or less
Measure the diameter of the largest hail stone with a ruler
Swirling dust on the ground below a funnel cloud
How to Report
CoCoRaHS - rainfall nework
Sarah Nilsson, J.D., Ph.D., MAS
602 561 8665
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