Welcome to the Alliance International Aviation Weather Center. We have added this area to assist our customers with making the best "go" or "no-go" weather-related decision possible. The information here is to supplement, not replace, official FAA weather briefings.


Current U.S. Weather Conditions…

Current Surface Conditions

National Radar Summary



Southwest U.S.
Northwest U.S.
Central U.S .
Southeast U.S.
Northeast U.S.

National Satellite Image



Southwest U.S.
Northwest U.S.
Central U.S .
Southeast U.S.
Northeast U.S.

For more weather maps and city forecasts, visit The Weather Channel's web site.


Local Doppler Radar Imagery…






Portland, OR

Seattle, WA

Albuquerque, NM

Los Angeles, CA

Salt Lake City, UT

San Diego, CA

San Francisco, CA

Brownsville, TX

Chicago, IL

Dallas/Ft. Worth TX

Denver, CO

Detriot, MI

Houston, TX

Indianapolis, IN

Kansas City, MO


New Orleans, LA

Oklahoma City, OK

Omaha, NE

Rapid City, SD

St. Louis, MO

Baltimore, MD

Boston, MA

Cleveland, OH

New York, NY

Norfolk, VA

Philadelphia, PA

Portland, ME

Richmond, VA

Washington, DC

Atlanta, GA

Charleston, SC

Jacksonville, FL

Key West, FL

Louisville, KY

Melbourne, FL

Memphis, TN

Miami, FL

Morehead City, NC

Tampa, FL

Valparaiso, FL

 For more weather maps and city forecasts, visit The Weather Channel's web site.


DIFAX Graphic Weather Products…

Click on the desired product. Images are automatically downloaded from the National Weather Service's FTP server. (Images are in .TIFF format.)

Weather Depiction Chart

Surface Analysis Chart

Radar Summary Chart

Significant Weather: Low Altitude

Significant Weather: High Altitude

Lifted Index & Precipitable Water Chart

Severe Weather Outlook Chart

Observed Winds and Temperatures Aloft Chart

Tropopause Streams / Isotachs / Temperatures / Vertical Wind Shear (18 Hr.)

850-mb Analysis (5,000')

700-mb Analysis (10,000')

500-mb Analysis (18,000')

300-mb Analysis (30,000')

200-mb Analysis (39,000')


The complete DIFAX weather chart selection (including some international charts) may be found on The National Weather Service's web site. The charts above are enveloped in .TIFF format. You will likely need a plug-in or helper application to utilize them.

Graphic AIRMETs and SIGMETs…

AIRMETs -- Eastern U.S.

AIRMET's -- Western U.S.

IFR Conditions

IFR Conditions





SIGMETs -- Eastern U.S.

SIGMETs -- Western U.S.

View Eastern SIGMETs

View Western SIGMETs

Specialized weather information for pilots can be found on the Aviation Weather Center's web site. You can also access current METAR and TAF reports through the Aviation Weather Center.

U.S. Time Conversions from Standard to UTC…

(Subtract 1 hour for Daylight Savings Time)

EST to UTC add 5 hours

CST to UTC add 6 hours

MST to UTC add 7 hours

PST to UTC add 8 hours

AST to UTC add 9 hours

Hawaii and Aleutian Islands to UTC add 10 hours


GTE DUATs is now available on line! Access GTE's "Preflight" service through their SkyCentral site. There, you can receive textual weather briefings, plan flights, and file FAA and/or ICAO flight plans. Click here to visit SkyCentral.

As always, you can reach a FAA Flight Service Station or Automated Flight Service Station by any telephone, toll-free at: