Report Summary

  • 51

    Performance

    Renders faster than
    69% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    25% of websites

aviationweather.gov

Aviation Weather Center

Page Load Speed

851 ms in total

First Response

202 ms

Resources Loaded

503 ms

Page Rendered

146 ms

aviationweather.gov screenshot

About Website

Click here to check amazing Aviation Weather content for United States. Otherwise, check out these important facts you probably never knew about aviationweather.gov

How can the Aviation Weather Center help you? AWC provides comprehensive user-friendly aviation weather information.

Visit aviationweather.gov

Key Findings

We analyzed Aviationweather.gov page load time and found that the first response time was 202 ms and then it took 649 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

aviationweather.gov performance score

51

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

14/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

22/100

25%

SI (Speed Index)

Value5.2 s

59/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.241

52/100

15%

TTI (Time to Interactive)

Value5.8 s

66/100

10%

Network Requests Diagram

aviationweather.gov

202 ms

jquery-1.9.1.js

9 ms

OpenLayers.js

34 ms

awc_openlayers.js

31 ms

mainmap.js

31 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 51% of them (22 requests) were addressed to the original Aviationweather.gov, 40% (17 requests) were made to Aviationweather.cp.ncep.noaa.gov and 9% (4 requests) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (202 ms) belongs to the original domain Aviationweather.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.6 MB (70%)

Content Size

2.2 MB

After Optimization

671.4 kB

In fact, the total size of Aviationweather.gov main page is 2.2 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Javascripts take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 292.2 kB

  • Original 322.6 kB
  • After minification 320.6 kB
  • After compression 30.4 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 292.2 kB or 91% of the original size.

Image Optimization

-3%

Potential reduce by 10.6 kB

  • Original 376.4 kB
  • After minification 365.8 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Aviation Weather images are well optimized though.

JavaScript Optimization

-82%

Potential reduce by 1.2 MB

  • Original 1.5 MB
  • After minification 1.2 MB
  • After compression 265.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 1.2 MB or 82% of the original size.

CSS Optimization

-68%

Potential reduce by 20.2 kB

  • Original 29.6 kB
  • After minification 23.5 kB
  • After compression 9.4 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Aviationweather.gov needs all CSS files to be minified and compressed as it can save up to 20.2 kB or 68% of the original size.

Requests Breakdown

Number of requests can be reduced by 27 (64%)

Requests Now

42

After Optimization

15

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Aviation Weather. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

aviationweather.gov accessibility score

84

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

aviationweather.gov best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

aviationweather.gov SEO score

67

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Aviationweather.gov can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Aviationweather.gov main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Aviation Weather. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: