TORNADOS

Plan ahead. Be sure everyone in your household knows where to go and what to do in case of a tornado warning.

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SEVERE THUNDERSTORMS

A thunderstorm is considered severe if it produces hail at least 1 inch in diameter or has wind gusts of at least 58 miles per hour.

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STORM DAMAGE

The May 2011 storm struck Battle Creek about 4:30 p.m., tipping hundreds of trees and damaging several buildings.

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EXTREME HEAT

A heat wave is an extended period of extreme heat, and is often accompanied by high humidity. These conditions can be dangerous and even life-threatening for humans who don't take the proper precautions..

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Spotters what to report and not report to the National Weather Service.

Please Submit Reports on All:

  • Tornadoes
  • Funnel Clouds
  • Waterspouts
  • Wall Clouds
  • Shelf Clouds
  • Hail
  • Storm Damage
  • Flooding
  • Heavy Rainfall
  • Winter Weather

What To Report 

  1. Wind of 58 mph or greater
  2. Hail of any size
  3. Funnel with rotation, or rotation in the clouds
  4. Tornado on the ground
  5. Rotating wall cloud
  6. Local flooding (flash flood)
  7. Property damage
  • When - Start time and, if possible, duration of event.
  • Where - Location(s) of event (or path)
  • What - Types of severe weather observed
  • Your phone number (if we need additional information)

What Not To Report 

  1. Do not call the Grand Rapids weather service if we have a local severe weather net active
  2. Big black clouds (BBC)
  3. Rain (Net control already knows that it's raining)
  4. Wind less than 58 mph
  5. It's not raining
  6. Scud clouds

Report Hail of Any Size
Hail Reference Chart

Pea – 0.25"

Plain M&M – 0.50"

Penny – 0.75"

Nickel – 0.88"

Quarter – 1.00"

Half Dollar – 1.25"

Ping Pong – 1.50"

Golf Ball – 1.75"

Lime – 2.00"

Tennis Ball – 2.50"

Baseball – 2.75"

Large Apple – 3.00"

Softball – 4.00"

Grapefruit – 4.50"

Amateur Radio Operators that have joined a dedicated formal SKYWARN Net

  • Please Do Not Call The National Weather Services 
    1-800 NUMBER!
  • Submit all your reports to the net control operator.
  • Net control will relay all reports to the National Weather Service in Grand Rapids.

Amateur spotters with SKYWARN training who are not Amateur Radio Operators


GRAND RAPIDS: GRR
NWS Office, NOAA
4899 South Complex Dr. SE
Grand Rapids, MI 49512-4034
(616) 949-0643, Ext. 726
Contact: Jim Maczko
This email address is being protected from spambots. You need JavaScript enabled to view it.
http://www.weather.gov/grr/


This information was verified with the Grand Rapids Weather Service
May 21, 2013 by Dave Smith


 

 

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