National Weather Service United States Department of Commerce

Chicago, IL

Weather Forecast Office

GYY Tower Weather

Weather.gov > Chicago, IL > GYY Tower Weather
 

Latest GYY TAF Impacts Board

KGYY
 Aviation Forecast Discussion
 

 
 

GYY

Default Runway is 12/30
 

Latest GYY Observations

Surface Weather Charts

 

6 HR Forecast Surface Map

6 HR Forecast Surface Map

12 HR Forecast Surface Map

12 HR Forecast Surface Map

18 HR Forecast Surface Map

18 HR Forecast Surface Map

24 HR Forecast Surface Map

24 HR Forecast Surface Map

Gary Hourly Weather Forecast

 

 

Hourly Weather Forecast

 

Interactive Radar Display

What is this?

Interactive National Radar Display

 

 

Latest Satellite

Great Lakes Visible Satellite

Great Lakes Visible Satellite (Loop)

Great Lakes IR Satellite

Great Lakes IR Satellite (Loop)

Great Lakes Water Vapor Satellite

Great Lakes Water Vapor Satellite (Loop)
 

 

Active SIGMETs

Click on images to get the full size graphic

Active SIGMETs
Active SIGMETs

 

AIRMETs

 

Turbulence
Current Turb AIRMET 3HR TURB AIRMET 6HR TURB AIRMET 9HR TURB AIRMET
Turbulence Current Turbulence +3hr Turbulence +6hr Turbulence +9hr

 

Icing
CURRENT ICING AIRMET 3HR ICING AIRMET 6HR ICING AIRMET 9HR ICING AIRMET
Icing Current Icing +3hr Icing +6hr Icing +9hr

 

IFR/MTN OBSC (Mountain Obscuration)
CURRENT IFR/MTN OBSC AIRMET 3HR IFR/MTN OBSC AIRMET 6HR IFR/MTN OBSC AIRMET 9HR IFR/MTN OBSC AIRMET
IFR/MTN OBSC Current IFR/MTN OSBC +3hr IFR/MTN OBSC +6hr IFR/MTN OBSC +9hr

 

 

 

Flight Categories Map

 

 

 

Latest Extended TCF Forecast

 

TFM Convective Forecast

 

4 HR Forecast

4 HR Forecast

6 HR Forecast

6 HR Forecast

8 HR Forecast

8 HR Forecast

TCF Map Legend

TCF Map Legend
 

Latest Watch/Warning/Advisory Display

Southern Florida NE Gulf N of 25N E of 87W Gulf from 22N to 25N E of 87W including Straits of Florida NW Gulf including Stetson Bank N Central Gulf including Flower Garden Banks Marine Sanctuary W Central Gulf from 22N to 26N W of 94W Central Gulf from 22N to 26N between 87W and 94W Atlantic from 27N to 31N W of 77W Atlantic from 27N to 31N between 70W and 77W Atlantic from 27N to 31N between 65W and 70W Bahamas N of 22N including the Cay Sal Bank Atlantic from 22N to 27N E of Bahamas to 70W Tropical N Atlantic from 15N to 19N between 55W and 60W Caribbean N of 18N between 76W and 85W including the Cayman Basin Caribbean N of 18N between 76W and 85W including the Cayman Basin Caribbean approaches to the Windward Passage Atlantic S of 22N W of 70W including approaches to the Windward Passage Newport/Morehead City, NC Brownsville, TX Corpus Christi, TX Houston/Galveston, TX New Orleans, LA Lake Charles, LA Mobile, AL Tallahassee, FL Tampa, FL Miami, FL Key West, FL Florida Keys Miami, FL Melbourne, FL Jacksonville, FL Charleston, SC Wilmington, NC Baltimore/Washington, DC Wakefield, VA Philadelphia/Mt. Holly, PA/NJ New York, NY Boston, MA Gray/Portland, ME Intra Coastal Waters from Schoodic Point ME to Stonington ME Coastal Waters from Schoodic Point ME to Stonington ME out 25 NM Waters from Eastport ME to Stonington ME from 25 to 40 NM Northeast Minnesota and Northern Wisconsin Northern Michigan Northern Michigan Northern Michigan East Central Wisconsin - Green Bay East Central Wisconsin - Green Bay Southern and Southeastern Wisconsin Northeastern Illinois and Northwestern Indiana - Chicago Northern Indiana and Northwestern Ohio Southwestern Michigan Northeast Michigan - Gaylord Northeast Michigan - Gaylord Northeast Michigan - Gaylord Southeastern Michigan - Detroit Southeastern Michigan - Detroit Southeastern Michigan - Detroit Northern Ohio Western New York - Buffalo Western New York - Buffalo Northern Michigan Los Angeles, CA San Diego, CA San Francisco Bay Area/Monterey, CA Eureka, CA Medford, OR Portland, OR Seattle, WA Los Angeles Area Los Angeles Area Los Angeles Area Los Angeles Area Los Angeles Area Los Angeles Area South Central California San Francisco Area Western Nevada North Central California Northwest California Coast Southwest Oregon and Northern California Northeast Oregon and Southeast Washington Northwest Oregon Northwest Washington Eastern Washington and Northern Idaho Southern Nevada, Southeastern California and Northwestern Arizona - Las Vegas Southwestern California - San Diego Central Arizona and California Deserts Southeast Arizona Northern Arizona Utah Northern and Northeastern Nevada Southwestern Idaho and Eastern Oregon Southeastern Idaho Western Montana and Central Idaho Central Montana - Great Falls Northeastern Montana Southeastern Montana Western Wyoming Southeastern Wyoming and Western Nebraska Northeastern Colorado Western Colorado and Eastern Utah Southeastern Colorado Northern and Central New Mexico Southern New Mexico and extreme Western Texas - El Paso Texas and Oklahoma Lubbock and South Plains Texas Western Texas and Southeastern New Mexico Western South Dakota and Northeastern Wyoming Northwestern Kansas and East Central Colorado - Goodland Central Nebraska - North Platte North Central Kansas and South Central Nebraska Southeastern South Dakota, Southwestern Minnesota, and Northwestern Iowa Northern and Northeastern South Dakota Western North Dakota Eastern Nebraska and Southwestern Iowa - Omaha Valley Northeastern Kansas Southeastern Kansas Southwestern Kansas - Dodge City Central Oklahoma Eastern Oklahoma and Northwestern Arkansas Dallas and Fort Worth Central Texas - San Angelo Austin and San Antonio Texas Corpus Christi, Victoria, and Laredo Texas Southern Texas Texas - Houston/Galveston Southeast Texas and Southwest Louisiana Northern Louisiana and Eastern Texas - Shreveport Arkansas Southwestern Missouri Northwestern Missouri Central Iowa Southern Minnesota Northeastern North Dakota and Northwestern Minnesota Northeast Minnesota and Northern Wisconsin Southwestern Wisconsin, Southeastern Minnesota, and Northeast Iowa Eastern Iowa and Northwestern Illinois - Quad Cities Eastern Missouri - West Central Illinois Western Tennessee, Eastern Arkansas and Northern Mississippi - Memphis Central Mississippi Southeastern Louisiana Middle Tennessee Northern Alabama Central Alabama Mobile - Pensacola West Central Florida East Central Florida Panhandle of Florida and Southwestern Georgia Northeast Florida and Southeast Georgia Northern and Central Georgia Low Country of South Carolina and Georgia Northeastern South Carolina and Southeastern North Carolina - Wilmington Central South Carolina and CSRA Western North Carolina and Northwest South Carolina Eastern Tennessee Eastern Kentucky Central Kentucky Southern Illinois and Indiana, Southeastern Missouri and Western Kentucky Central and East Central Illinois Central Indiana Northeastern Illinois and Northwestern Indiana - Chicago Southern and Southeastern Wisconsin East Central Wisconsin - Green Bay Northern Michigan Northeast Michigan - Gaylord Northeast Michigan - Gaylord Southeastern Michigan - Detroit Southwestern Michigan Northern Indiana and Northwestern Ohio Southwestern Ohio Northern Kentucky West Virginia Western Virginia, Southeast West Virginia, and Northwest North Carolina Central North Carolina - Raleigh Eastern North Carolina Eastern Virginia, Southern Maryland and Northeast North Carolina Washington D.C., Central Maryland, Northern Virginia, Eastern West Virginia Western Pennsylvania, East Central Ohio and Extreme Western Maryland Northern Ohio Central Pennsylvania New Jersey, Delaware, and Southeastern Pennsylvania New York City and Surrounding Areas South Central New York and Northeastern Pennsylvania Western New York - Buffalo Eastern New York and Western New England Areas Boston and Surrounding Areas Northern Vermont and New York Southern Maine and New Hampshire Northern Maine Gulf of Maine to the Hague Line Georges Bank between Cape Cod and 68W north of 1000 fathoms South of New England between the Great South Channel and Montauk Point to 1000 fathoms South of Long Island between Montauk Point and Sandy Hook to 1000 fathoms Hudson Canyon to Baltimore Canyon to 1000 fathoms Baltimore Canyon to Cape Charles Light to 100 NM offshore Cape Charles Light to Currituck Beach Light to 100 NM offshore Currituck Beach Light to Cape Hatteras to 100 NM offshore Cape Hatteras to Cape Fear to 100 NM offshore Cape Fear to 31N to 1000 FM Georges Bank between 68W and the Hague Line East of 69W to the Hague Line between 1000 fathoms and 39N East of 69W and south of 39N to 250 NM offshore Between 1000 fathoms and 38.5N west of 69W Baltimore Canyon to 69W east of 1000 fathoms and south of 38.5N to 250 NM offshore Baltimore Canyon to Hatteras Canyon between 100 NM and 250 NM offshore Hatteras Canyon to Cape Fear 100 NM and 250 NM offshore Cape Fear to 31N east of 1000 fathoms to 250 NM offshore Cape Flattery to Cape Shoalwater between 60 NM and 150 NM offshore Cape Shoalwater to Cape Lookout between 60 NM and 150 NM offshore Cape Lookout to Florence, OR between 60 NM and 150 NM offshore Florence, OR to Point St. George between 60 NM and 150 NM offshore Point St. George to Point Arena between 60 NM and 150 NM offshore Point Arena to Pigeon Point between 60 NM and 150 NM offshore Pigeon Point to Point Piedras Blancas between 60 NM and 150 NM offshore Point Piedras Blancas to Santa Cruz Island, CA between 60 NM and 150 NM offshore Santa Cruz Island, CA to San Clemente Island, CA between 60 NM and 150 NM offshore Cape Flattery to Cape Shoalwater between 150 NM and 250 NM offshore Cape Shoalwater to Cape Lookout between 150 NM and 250 NM offshore Cape Lookout to Florence, OR between 150 NM and 250 NM offshore Florence, OR to Point St. George between 150 NM and 250 NM offshore Point St. George to Point Arena between 150 NM and 250 NM offshore Point Arena to Pigeon Point between 150 NM and 250 NM offshore Pigeon Point to Point Piedras Blancas between 150 NM and 250 NM offshore Point Piedras Blancas to Santa Cruz Island, CA between 150 NM and 250 NM offshore Santa Cruz Island, CA to 120W between 150 NM and 250 NM offshore San Clemente Island, CA to Guadalupe Island from 60 NM Offshore west to 120WJuneau, AK Fairbanks, AK Anchorage, AK Western US Arctic Offshore Eastern US Arctic Offshore Bering Sea offshore 171 degrees West to 180 degrees and north of 56 degrees North Bering Sea offshore 171 degrees West to 180 degrees and south of 56 degrees North Pribilof Islands (St. Paul and St. George) Bering Sea offshore east of 171 degrees West Gulf of Alaska offshore north of 57 degrees North and west of 144 degrees West Gulf of Alaska offshore south of 57 degrees North north of 55 degrees North and west of 144 degrees West Gulf of Alaska north of 55 degrees North and east of 144 degrees West
NWS Watch, Warning, Advisory Display
 
NWS Warnings and Advisories on this map become active links to IWIN products (below):
A new browser window will open to display these text products.
Convective/Tropical Weather Flooding Winter Weather Non-Precipitation
Tornado Watch
Tornado Warning*
Severe Thunderstorm Watch
Severe Thunderstorm Warning*
Hurricane Watch
Hurricane Warning
Tropical Storm Watch
Tropical Storm Warning		 Flash Flood Watch
Flash Flood Warning*
Coastal/Flood Watch
Coastal/Flood Warning
Small Stream Flood Advisory		 Blizzard Warning
Winter Storm Watch
Winter Storm Warning
Snow Advisory
Freezing Rain Advisory
Ice Storm Warning
Winter Weather Advisory		 High Wind Warning or Advisory

 

NWS Chicago Weather Story

Follow us on Twitter  Follow us on Twitter
Follow us on Facebook  Follow us on Facebook
Follow us on YouTube  Follow us on YouTube
LOT RSS Feed  LOT RSS Feed

Hazards
Enhanced Hazardous Weather Outlook
Hazardous Weather Outlook
National Briefing
Skywarn
Outlooks
Watch/Warning/Advisory Criteria
Snow Squall Warnings

Local Forecasts
Text Products
Aviation
Marine
Fire
Enhanced Data Display (EDD)
Great Lakes Marine Portal
Lake Michigan Beach Forecast
El Nino
Snow and Ice Probabilities

Current Conditions
Current Conditions
CoCoRaHs
Drought Monitor

Past Weather
Stormdata
Holiday Climate Data
Climate Plots
Weather Event Write-Ups

Education
Jetstream
Student Opportunities
NWS Training Portal
Play Time for Kids

Weather Safety
Severe Weather Preparedness
Rip Currents
Lightning
NOAA Weather Radio
Winter Weather Preparedness
Weather Safety (Spanish)
Beach Hazards Awareness
Heat Safety

Information
Social Media Feeds