I would like to thank the people who helped me with this list!! This is a quick slap together list not in any order. I do have plans to updating this list so it's by county. If you see any errors or have anything else to add please e-mail me shabec98@yahoo.com.

Also for you spotters / Chasers Check out my Weather Link for IL.

Also here is a program that helps decode the RTTY weather data that's transmitted on 147.060 in the Chicago area. Click Here to Download.

Or try this NEW program from Jerry Kimento jerrywk@ix.netcom.com for the 147.060Mhz system. Click here to Download.

Also check out the following websites:
Milwaukee Area Skywarn Association
Frequencies for the rest of the country

Chicago area Skywarn Map Thanks to John-N9MYC
Central Illinois Map and Frequencies for spotters

NORTHERN ILLINOIS:

Lake County:

147.18, 147.78 (PL 127.3)

DuPage and Cook County:

147.510 naperville weather net. KC9CHY simplex also
443.050 pos. offset Naperville weather net and repeater KC9CHY. operated by WB9QAH.
460.975 - Lemont EMA spotting and call outs
155.025 - (ESMARN) run by DuPage County OEM (Office of Emergency Management)
145.710- DCOEM/KB9RDZ
154.965- DPC OEM, Aurora, and Naperville
37.94 - DuPage County Emergency Radio Net (DCERN- not DUCERN)
147.060 300bd weather info, use standard modem to decode
442.900 Schaumburg
442.975 Chicago
442.925-146.925 Rutland Township
442.950 DeKalb Fishfar repeater system. Primary link between
local nets and Chicago Skywarn. Reports should go to the local net
first, then from the local net to Chicago Skywarn on the FAR.
The Link Between NWS Romeville and Chicago Skywarn is on the 222 band ( I
don't have it right of the top of my head), with the FAR being the secondary link.
146.67 WAFAR Skywarn Net Chicago
146.805 TRITOWN Skywarn net Hazelcrest (south and Southeast Burbs)
Elgin:
147.525, 146.79(R) 107.2PL
Bolingbrook:
147.33, 224.54

Kane County:

The primary frequency for the Kane County OEM is 156.1725 . Just about all the OEM's operations are on that frequency. Also the OEM simulcasts from the their EOC on their old frequency of 158.745 (103.5 Hz. PL) with weather spotter information as well as their new frequency.

On the ham end of things, the primary frequency is:
145.470 (103.5 Hz. PL).
Altermnate is:
443.025 (114.8 Hz. PL).

Kendall County:

The weather freq for Kendall county ARES is 147.375

The Kendall County EMA usually uses 460.375 sometimes 460.575

Will County:

444.550 MHz, standard input offset (+ 5 MHz) and PL of 114.8. co-sponsored by the Plainfield Radio League / Will Co EMA. This is currently designated to be used as a relay between spotters “in the field” in Will County (who report information to the EOC via a different freq – either the Will Co 800 system or another ham freq) and NWS Lockport.
Will Co. EMA automatically retransmits the eas on the 155.760.
146.820, 146.220 (PL 107.2)

McHenry County:

146.835 Woodstock repeater. It uses a PL of 91.5 Hz(Thank You John W9ZE)
145.410 alternate frequency (PL 91.5)

Lee County:

146.970, 146.370 (CS)

Ogle County:

147.105

Winnebago County:

147.195Mhz - Winnebago County (114.8PL)

Dekalb County:

146.730, 146.130 in (PL 100.0)

CENTRAL ILLINOIS ESDA, WX SPOTTER FREQUENCIES:

45.560 NOAA Lincoln WX Service new 32 county weather net to NOAA Lincoln (PL 210.7)

Champaign County, Champaign-Urbana, IL

147.060 (131.8) Champaign County ARES repeater (backup to 444.100) {old PL was 107.2}
155.865 (131.8) Mahomet ESDA
155.755 (CSQ) Philo ESDA
158.805 (127.3) Savoy ESDA
158.820 (186.2) Thomasboro ESDA
155.955 (CSQ) Royal ESDA
155.040(out) 158.925(in) (131.8 PL) ESDA-Main Repeater,Highway Dept
155.115 (131.8 PL) ESDA-Town-to-Town (simplex)
Ham spotters on 444.100 pl 162.2

Just a Note from above:

Champaign ARES repeater is at 444.100. Normally all severe weather nets occur there, while the repeater at 147.060 is used for general information, spotter-to-spotter communication, and non-spotter reports (and as backup in case the 444.100 repeater is down). EMA (formerly known as ESDA) spotters use the 155.040 frequency, while ARES spotters use the other two.

Thanks for Chris Anderson for the updated information!!

Boone County:

147.375, 147.975 in (PL 100.0)


McLean County ( Bloomington - Normal IL):

453.700 Mclean County esda (PL 103.5) (main channel)
45.5200 Mclean County esda (CS) some of the towns still use this to communicate with the eoc.
155.790 City of LeRoy esda (DPL360)
154.965 Cities of Colfax, Anchor, Cooksville esda (CS)
159.105 City of Gridley (PL 186.2)
453.450 City of Lexington (PL 103.5)
155.115 City of Chenoa (PL 173.8)
153.860 City of Mclean ( CS)
154.085 Cities of Danvers and Carlock (CS)
461.975 City of Heyworth & Randolph Township (PL 107.2)
155.700 City of Stanford (CS)
Also McLean co esda is also on the METCOM 800 MHz Johnson trunking system also McLean County Ham Repeaters
146.790 McLean County ARES Repeater
146.940 Backup ARES Repeater

Sangamon County:

45.440 IEMA Springfield (PL 103.5)

Woodford County:

155.820 - Tremont Storm Chasers Tremont, IL w/ association w/ Lincoln, IL
155.025 Woodford Co esda (CS)
156.120 Woodford Co esda repeater (PL 114.8) shared with co highway dept.
39.900 Woodford Co esda Command and control channel
154.055 Eureka esda (CS)
154.860 Metamora esda (CS)
155.265 Congerville esda/fd (PL 131.8)
155.880 Elpaso esda (PL 114.8)
153.980 Elpaso esda paging channel
154.115 Minonk city esda
45.560 Lincoln WX Service (PL 210.7)
Ham Repeater:
147.255 + Woodford Co Races repeater (PL 103.5)
147.570 s Woodford Co Races simplex (CS)
453.825 (77.0) El Paso spotters (repeater)

Tazewell County:
155.070 (131.8) Main ESDA repeater (repeats 158.970) - formerly was the sheriff repeater prior to TAZCOM EDACS TRS
453.150 (186.2) Washington ESDA
155.820 Tazewell Co esda (CS)
39.900 Tazewell Co esda Command & Control (CS)
453.150 Washington City esda (PL 186.2)
45.560 Lincoln WX service (PL 210.7)
146.910 - Tazewell County WX Net (CS)

Piatt County:

453.500 (151.4) Piatt County Highway/ESDA repeater
155.805 (114.8) Mansfield ESDA

Livingston County:

154.340 Pontiac esda/fire (CS)
462.950/467.950 (103.5) is reported to be Fire Ch2 and ESDA
Weather watch/warning updates are announced simultaneously on 460.100, 460.225, 460.600, and 462.950
458.775 (173.8) FD ch 7 - Dwight ESDA spotters PD/FD ch7 (simplex)
458.300 (107.2) FD ch 5 - Pontiac weather spotters (simplex)

Dewitt County:

155.025 Dewitt Co esda (CS)
45.240 Dewitt Co esda (CS)
45.560 Lincoln WX service (PL 210.7)
146.985 - Clinton area (CS)

Logan County:

158.760 Logan Co esda (PL 110.9)
45.560 Lincoln WX Service (PL 210.7)
147.345 - Lincoln/Logan Co ARES

Peoria County:

154.295 Peoria County esda/underwater rescue unit (PL 186.2) they have 2
repeaters one on the west side of county and one on the east side on the bluff of the Illinois river.
155.925 Peoria city esda (PL 100.0)
155.040 Peoria city esda & city paging (CS)
47.500 Peoria city esda to major companies in the area
45.560 Lincoln WX Service (PL 210.7)
155.025 Statewide esda (ESMARN (CS)
Also city of Peoria is putting in a new GE EDAS system so I think city esda is moving it operations over to this now.
146.760 - Peoria City esda group

Kankakee County:

Kankakee County ARES
146.94, 444.8, 155.025

Grundy County:

147.27 + offset, 107.2 pl. This primary channel.
Also used is 442.325 + offset, 114.8 pl, as a secondary or backup.
Both of the repeaters are located south of Morris at the Grundy Co. Highway Dept. On a county owned tower. These are good wide area repeaters and are open to anyone . They also have an APRS Digi located at the Grundy Co. EOC, in Morris.
TG 1268 on the Grundy County TRS is reportedly used by ESDA (I haven't confirmed it thought). TG 1200 is an ISPERN patch where you can hear tornado warning broadcasts by ISP as storms pass through the area. Download our Grundy county profile for the Grundy county Trunk system information: http://www.carmachicago.com/profiles.html

Lasalle County:

147.120, 147.720 (CS)

SOUTHERN ILLINOIS:

Williamson County:

Shawnee Amateur Radio Association Marion, IL
146.640

STATEWIDE SYSTEMS:

You should monitor the following Illinois Emergency Management freqs:
45.28, 45.36, 45.40. 45.44, 45.56

Illinois State Police:

42.500 - Dispatcher often give Weather Watches and Warning over this Frequency
155.475 - ISPERN - Sometimes weather reports and Warning will be broadcasted.

INDIANA:

Lake County Indiana Skywarn 146.700 with a PL of 82.5. Located in Merrillville
Porter County Indiana weather spotting frequency is 147.105 with a PL of 131.8.

Nationwide Stuff:

146.550 - Chasers National simplex frequency