Go Back
  • For Business
  • |
  • Warnings
  • Data Suite
  • Forensics
  • Advertising
  • Superior Accuracy™
Severe weather outbreak to peak Friday with tornadoes. Click for the forecast. Chevron right

Ashburn, VA

78°F
Location Chevron down
Location News Videos
Use Current Location
Recent

Ashburn

Virginia

78°
No results found.
Try searching for a city, zip code or point of interest.
Create Your Account Unlock extended daily and hourly forecasts — all with your free account.
Let's Go Chevron right
Have an account already? Log In
settings
Help
Ashburn, VA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

Around the Globe

Hurricane Tracker

Severe Weather

Radar & Maps

News

News & Features

Astronomy

Business

Climate

Health

Recreation

Sports

Travel

For Business

Warnings

Data Suite

Forensics

Advertising

Superior Accuracy™

Video

Winter Center

About

Press

Careers FAQ Contact Us

AccuWeather Responds to Miscoded NWS Tsunami Warning

Updated Feb 6, 2018 1:27 PM EDT

Copied

Miscoded NWS Test Leads to False Tsunami Warning By Multiple Weather Media Outlets

AccuWeather Global Headquarters - February 6, 2018 - This morning AccuWeather passed on a National Weather Service Tsunami Warning that was intended by the NWS to be a test but was miscoded by the NWS as a real warning. AccuWeather has the most sophisticated system for passing on NWS tsunami warnings based on a complete computer scan of the codes used by the NWS. While the words “TEST” were in the header, the actual codes read by computers used coding for real warning, indicating it was a real warning.

The NWS warning also later appeared on other sources such as The Weather Channel and it even appears on some pages of the NWS own website as a real warning. The NWS is the original source of the information and displayed it as a real warning.

Tsunami warnings are handled with the utmost concern by AccuWeather and it has sophisticated algorithms to scan the entire message, not just header words, as from the time of a warning to the actual event can be mere minutes. AccuWeather was correct in reading the mistaken NWS codes embedded in the warning. The responsibility is on the NWS to properly and consistently code the messages, for only they know if the message is correct or not.

As reported by AccuWeather, once discovered that the NWS had incorrectly coded the warning, we sent messages via social channels that no tsunami warning is in effect for the East Coast of the U.S.

This is not the first time legitimate warning coding was embedded erroneously by the NWS and consequently triggered alerts. In October 2014, AccuWeather advised NWS in writing about the potential for this problem to be repeated if not fixed.

AccuWeather’s CEO Barry Myers wrote to the NWS over three years ago: “We understand the reason for test messages, but we feel that NWS consider fail safe measures for the future to prevent such an occurrence. The issuance did say it was a “TSUNAMI WARNING,” but it was not a tsunami warning, rather simply a test of the system. We note that the method currently used of relying on the “TEST” in the header of the product and a test in the VTEC status, as the identifying device for software coding in numerous programs and systems used by a plethora of companies to identify such messages, has proven to be a less than perfect system.”

This is all a matter of public record.

We are continuing to work with NWS to determine why this coding was improperly embedded in its test alert system.

For more information, contact:

Justin Roberti / 814.235.8756 / roberti@accuweather.com

Or call our 24-hour press hotline:

814-235-8710

Report a Typo
Comments that don't add to the conversation may be automatically or manually removed by Facebook or AccuWeather. Profanity, personal attacks, and spam will not be tolerated.
Comments
Hide Comments
Latest Press Releases
AccuWeather® Launches First of A Kind Weather App in ChatGPT
3 weeks ago
AccuWeather® and the Hunt Preservation Society Partner to Su...
4 weeks ago
AccuWeather NOW® Launches on Samsung TV Plus, Expanding Acce...
Mar 5, 2026

Top Stories

Severe Weather

Severe weather outbreak to peak Friday with tornado risk in central US

6 hours ago

Winter Weather

Cars are emerging from a massive snow pile months after winter storms

12 hours ago

Weather Forecasts

Cold snap, freeze to follow heat wave in part of eastern US

8 hours ago

Severe Weather

Tornadoes, grapefruit-size hail hit Iowa, Wisconsin amid week of storm...

1 day ago

Hurricane

Super Typhoon Sinlaku causes serious damage to islands

1 day ago

More Stories

Featured Stories

Astronomy

Artemis II astronauts describe their historic mission

6 hours ago

Weather News

7-month-old dies after being found in hot car in Tennessee

11 hours ago

Weather News

114 years later: How weather helped seal the Titanic’s fate

1 day ago

Weather News

River flooding, possible dam failure threatens Wisconsin, Michigan

9 hours ago

Astronomy

Lyrids 2026: How to see the 1st meteor shower since January

3 days ago

AccuWeather Press AccuWeather Responds to Miscoded NWS Tsunami Warning
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
Company
Proven Superior Accuracy™ About AccuWeather Digital Advertising Careers Press Contact Us
Products & Services
For Business For Partners For Advertising AccuWeather APIs AccuWeather Connect Personal Weather Stations
Apps & Downloads
iPhone App Android App See all Apps & Downloads
Subscription Services
AccuWeather Premium AccuWeather Professional
More
AccuWeather Ready Business Health Hurricane Leisure and Recreation Severe Weather Space and Astronomy Sports Travel Weather News Winter Center
© 2026 AccuWeather, Inc. "AccuWeather" and sun design are registered trademarks of AccuWeather, Inc. All Rights Reserved.
Terms of Use | Privacy Policy | Cookie Policy | About Your Privacy Do Not Sell or Share My Personal Information | Data Sources

...

...

...