Will County Skywarn

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Hazardous Weather Outlook Information

spotter training online



Wednesday nights, (1930) 7:30p.m
on the WB9IRL Repeater
145.210- PL107.2/444.600+ PL114.8 


Main Repeater is the 2m and crossbanded to 70cm IRLP coming soon.

The NWS offers Skywarn Classes to Educate the public,and is free of charge to attend. Amateur Radio Operators use 2m/440cm radios to communicate severe weather reporting criteria to spotter repeaters that report to Liaison repeaters that the NWS ham radio team listens and talks to. non-ham operators, call into either the NWS for severe weather criteria or in an Emergency or Tornadic event. I Would call you local 911 center For a Tornado first. We encourage everyone to get there amateur radio license.


Weather Radio Frequencies

162.400 162.425 162.450 162.475 162.500 162.525 162.550

To see how the Nation Weather Service and Skywarn net control operators work  NWS Severe Weather Repeaters

            Page Out System(Severe Weather Net-Spotter Activation) *link*

If you would like to be added to the Page out System, which notifies you via sms and/or email. Please fill out contact form and ask to be added. Information needed is, name,call sign if licensed,phone number of cell, carrier of cell,email address and location. When we activate nets for severe weather or if you want to be a Net control operator, we will start page outs for Net control availability first. Then everyone else will be Paged out when severe weather Nets open and severe weather is approaching. We Page out when ever there is activation via nws radio or nws ham team is activated! 24/7  Skywarn Nets can open at anytime when severe weather is forecasted for area!                  Sign me up




Smart Phone Links for weather Apps

Radar Scope      PYKL3      TWC    Spotter Network   Allison House


  Radar Programs

   Interwarn   Gr3level  Weather underground   Simuawips 


                                     E.M.A  and A.R.E.S


 Will County A.R.E.S         Cook County ARES     Lake County, IL A.R.E.S/R.A.C.E.S     Lake County, IN A.R.E.S                 Dupage County A.R.E.

New Lenox E.S.D.A           Will County E.M.A     New Lenox C.E.R.T    I.S.A.R.C     Tinley Park E.S.D.A

Cook County C.E.R.T        Cook County E.M.A    Kankakee E.S.D.A      I.E.S.M.A      Mokina E.S.D.                                  

 Educational Material For Spotters PDFS and Links

Lightning awareness guide

About Derechos    Chicago National Weather Service       National Weather Service Storm Prediction Area  Spotter Login for the NWS

Storm Spotter Training Guide  Pictures and guidelines for spotters to reference from  Pictures and guidelines for spotters to reference from

Advanced Storm Spotter Training Guide         Cloud Catolog    D-P Radar Training Area  Cloud Explanations    Cloud Formation Explanation

Online School for Weather NWS      Weather Glossary    Radar programs Gr3 Radar training page (for use with the Gr3level Radar)

Index to Skywarn sites on the Internet, By State    Skywarn online Course     Spotter field Guide   The Joplin Tornado Assessment

Thunder Storm outlines  Red cross Social media PDFweather radar fundamental   Comet Free weather learning site


Dupage County OEM/Severe Weather Seminar Topics Archives  (Downloads PDF)

Dupage County Weather Seminar Downloads

*StormThe Modern Storm Spotter – Randy Denzer, Tyler Allison and Joshua Jans

* Damage Surveys – Jim Allsopp, National Weather Service, Chicago, IL

*Squall Lines: Meteorology, Skywarn Spotting, and A Brief Look At The 18 June 2010 Derecho –

*Back to Basics – Paul Sirvatka, Professor, College of DuPage

*The Blizzard of 2011 – Jim Allsopp, National Weather Service, Chicago 

*Dual-Pol Radar – What Does It Mean For Spotters, Chasers and Emergency Managers? – Jim      

*Settings For Various Tornadic Storm Types – Roger Edwards  Spotter Realities – Paul Sirvatka, Professor, College of DuPage

*Spread The Word Save Lives With Social Media – Tammie Souza, Fox News Chicago

*Spotter Realities – Paul Sirvatka, Professor, College of DuPage
*special thank you to,mwk-skywarn,nws,Dupage.co for articles published on storm spotting/chasing.

2014 Severe Weather Seminar Links





Dual-pol radar course       MetED Weather online Classes Free



Conditions are occurring or imminent
Tornado A severe thunderstorm has developed and has either produced a tornado based on reports or radar has indicated intense low level rotation in the presence of atmospheric conditions conducive to tornado development
Severe Thunderstorm A severe thunderstorm has developed, capable of producing hail greater than one inch in diameter and/or 50 knot (58 mph) wind speeds
Flood Long duration areal or river flooding is occurring or is imminent, which may result from excessive rainfall, rapid snow melt, ice jams on rivers or other similar causes
Flash Flood Excessive rainfall producing thunderstorms have developed, leading to short duration flash flooding. A warning may also be issued if a dam break has occurred
Blizzard Wind speeds of 35 mph or greater, considerable falling or blowing snow, and visibilities frequently below a quarter mile are expected to prevail for three hours or more
Winter Storm Snow amounts of 6 inches or more in 12 hours, or 8 inches or more in 24 hours, or heavy sleet accumulations of one half inch or greater are expected. These may or may not be accompanied by wind or other phenomena. A warning may also be issued if conditions will be approaching blizzard criteria and/or have significant impacts, even if snowfall amounts are not expected to reach the criteria above
Ice Storm Ice accumulations of a quarter inch or more are expected
Lake Effect Snow Heavy lake effect snow is expected to produce amounts of 6 inches or more in 12 hours, or 8 inches or more in 24 hours
Wind Chill Widespread wind chill values around -30° or colder.  For NWS criteria across the area, clickhere.
Excessive Heat Chicago/Cook County: Three consecutive days with a peak heat index expected to reach 100-105° or two consecutive days with a forecast peak heat index 105-110° or one day with an expected peak heat index forecast at 110° or higher 

Elsewhere: Maximum heat index is expected to reach 110° or greater and a minimum heat index of 75° or greater for at least 48 hours

Freeze Widespread temperatures below freezing when during the growing season are expected
High Wind Synoptic scale gradient winds (those not associated with thunderstorms) or mesoscale winds associated with wake lows are expected to reach speeds of 40 mph or greater, sustained for at least one hour, or 58 mph or greater gusts
Red Flag This is intended primarily for land area managers and is issued when sustained 20 foot winds of 20 mph or higher, afternoon humidity values less than 25%, and ten hour fuel moisture of 8% or less are expected.


Want to see the IRL out in the Field? @41:00 start watching  video

The Video talks about us a little and how we Help others!


 Rip Current Information and Education for Lake Michigan


Rip Currents. How are they Created?

National Rip Current Page.