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preview.weather.gov screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 50

    SEO

    Google-friendlier than
    18% of websites

preview.weather.gov

National Weather Service

Page Load Speed

950 ms in total

First Response

43 ms

Resources Loaded

681 ms

Page Rendered

226 ms

preview.weather.gov screenshot

About Website

Welcome to preview.weather.gov homepage info - get ready to check Preview Weather best content for United States right away, or after learning these important things about preview.weather.gov

Visit preview.weather.gov

Key Findings

We analyzed Preview.weather.gov page load time and found that the first response time was 43 ms and then it took 907 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

preview.weather.gov performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value2.5 s

98/100

10%

TBT (Total Blocking Time)

Value300 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.094

91/100

15%

TTI (Time to Interactive)

Value4.8 s

79/100

10%

Network Requests Diagram

preview.weather.gov

43 ms

weatherstyle.css

21 ms

template.css

41 ms

myfcst.css

36 ms

ForecastSearch.css

54 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 90% of them (38 requests) were addressed to the original Preview.weather.gov, 5% (2 requests) were made to Googletagmanager.com and 2% (1 request) were made to Dap.digitalgov.gov. The less responsive or slowest element that took the longest time to load (366 ms) belongs to the original domain Preview.weather.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 416.2 kB (37%)

Content Size

1.1 MB

After Optimization

695.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Preview.weather.gov main page is 1.1 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. 50% of websites need less resources to load. Images take 735.9 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 128.3 kB

  • Original 159.7 kB
  • After minification 123.9 kB
  • After compression 31.4 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. This page needs HTML code to be minified as it can gain 35.8 kB, which is 22% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 128.3 kB or 80% of the original size.

Image Optimization

-27%

Potential reduce by 196.4 kB

  • Original 735.9 kB
  • After minification 539.4 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. Obviously, Preview Weather needs image optimization as it can save up to 196.4 kB or 27% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-41%

Potential reduce by 86.5 kB

  • Original 209.8 kB
  • After minification 200.9 kB
  • After compression 123.3 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 86.5 kB or 41% of the original size.

CSS Optimization

-78%

Potential reduce by 4.9 kB

  • Original 6.4 kB
  • After minification 5.0 kB
  • After compression 1.4 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. Preview.weather.gov needs all CSS files to be minified and compressed as it can save up to 4.9 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (46%)

Requests Now

41

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Preview 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 13 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

preview.weather.gov

preview.weather.gov

43 ms

weatherstyle.css

weatherstyle.css

21 ms

template.css

template.css

41 ms

myfcst.css

myfcst.css

36 ms

ForecastSearch.css

ForecastSearch.css

54 ms

pointforecast.css

pointforecast.css

30 ms

jquery-ui-1.10.3.custom.min.css

jquery-ui-1.10.3.custom.min.css

23 ms

jquery-1.10.2.min.js

jquery-1.10.2.min.js

38 ms

jquery-ui-1.10.3.custom.min.js

jquery-ui-1.10.3.custom.min.js

40 ms

jquery.hoverIntent.minified.js

jquery.hoverIntent.minified.js

45 ms

ForecastSearch.js

ForecastSearch.js

129 ms

Universal-Federated-Analytics-Min.js

Universal-Federated-Analytics-Min.js

30 ms

topNavMenu.js

topNavMenu.js

54 ms

NidsESRI.js

NidsESRI.js

54 ms

nwsexit.js

nwsexit.js

127 ms

js

js

126 ms

jquery-cookie.js

jquery-cookie.js

59 ms

MyForecastWidget.js

MyForecastWidget.js

154 ms

wwamap.css

wwamap.css

222 ms

search.css

search.css

17 ms

js

js

129 ms

webmon.js

webmon.js

172 ms

bg.png

bg.png

155 ms

header.png

header.png

156 ms

header_doc.png

header_doc.png

155 ms

head_shadow.png

head_shadow.png

155 ms

important.png

important.png

154 ms

US.png

US.png

160 ms

ak.png

ak.png

184 ms

hi.png

hi.png

197 ms

wildfire.png

wildfire.png

309 ms

heat2020.png

heat2020.png

278 ms

Summer-Preparedness-2024.png

Summer-Preparedness-2024.png

308 ms

twitter.png

twitter.png

232 ms

facebook.png

facebook.png

196 ms

youtube.png

youtube.png

253 ms

rss.png

rss.png

219 ms

usa_gov.png

usa_gov.png

233 ms

myfcst-bg.png

myfcst-bg.png

366 ms

bg_footer.png

bg_footer.png

179 ms

beryl.png

beryl.png

311 ms

myfcst-block-bg.png

myfcst-block-bg.png

366 ms

Accessibility Review

preview.weather.gov accessibility score

71

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

Best Practices

preview.weather.gov best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

preview.weather.gov SEO score

50

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

Links do not have descriptive text

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 Preview.weather.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 Preview.weather.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

preview.weather.gov

Open Graph description is not detected on the main page of Preview 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: