Noaa.gov National Oceanic and Atmospheric Administration | U.S. Department of Commerce
noaa.gov Mobile Performance
39/100
These metrics represent real-world Chrome users experience viewing noaa.gov on mobile devices. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
Cumulative Layout Shift
Largest Contentful Paint
First Contentful Paint
First Input Delay
Metrics
Largest Contentful Paint0/100 14.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
First Contentful Paint9/100 7.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Time to Interactive28/100 9.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index32/100 7.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
Total Blocking Time96/100 210 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (14)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 1,598 KiB
7,650 ms
Efficiently encode images
Potential savings of 1,286 KiB
6,450 ms
Eliminate render-blocking resources
Potential savings of 3,330 ms
3,330 ms
Remove unused CSS
Potential savings of 139 KiB
1,350 ms
Remove unused JavaScript
Potential savings of 85 KiB
600 ms
Minify JavaScript
Potential savings of 48 KiB
450 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Serve static assets with an efficient cache policy
49 resources found
Minimize main-thread work
3.2 s
Avoid enormous network payloads
Total size was 2,996 KiB
Keep request counts low and transfer sizes small
59 requests • 2,996 KiB
Avoid chaining critical requests
21 chains found
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
8 long tasks found
Passed Audits (14)
Use video formats for animated content
Initial server response time was short
Root document took 120 ms
Defer offscreen images
Uses passive listeners to improve scrolling performance
Preload key requests
JavaScript execution time
0.7 s
Minify CSS
Avoids `document.write()`
Properly size images
Minimize third-party usage
Third-party code blocked the main thread for 110 ms
Enable text compression
Avoid multiple page redirects
Potential savings of 630 ms
Avoids an excessive DOM size
430 elements
Preconnect to required origins
noaa.gov Mobile SEO
92/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (1)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Passed Audits (11)
Document uses legible font sizes
92.4% legible text
Tap targets are sized appropriately
100% appropriately sized tap targets
Document has a valid `hreflang`
Document has a `<title>` element
Links have descriptive text
Document avoids plugins
Document has a valid `rel=canonical`
Links are crawlable
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Page isn’t blocked from indexing
Page has successful HTTP status code
noaa.gov Mobile Best Practices
69/100
These checks highlight opportunities to improve the overall code health of noaa.gov mobile page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (4)
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Includes front-end JavaScript libraries with known security vulnerabilities
11 vulnerabilities detected
General
Browser errors were logged to the console
Passed Audits (10)
Avoids requesting the notification permission on page load
Properly defines charset
Detected JavaScript libraries
Allows users to paste into password fields
Avoids requesting the geolocation permission on page load
Displays images with correct aspect ratio
Page has the HTML doctype
Avoids Application Cache
Serves images with appropriate resolution
Avoids deprecated APIs
noaa.gov Mobile Progressive Web App
46/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (9)
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Does not provide a valid `apple-touch-icon`
Installable
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
Web app manifest does not meet the installability requirements
Fast and reliable
Current page does not respond with a 200 when offline
`start_url` does not respond with a 200 when offline
Passed Audits (5)
Contains some content when JavaScript is not available
Page load is fast enough on mobile networks
Content is sized correctly for the viewport
Redirects HTTP traffic to HTTPS
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
noaa.gov Mobile Accessibility
94/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (3)
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
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.
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (18)
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Form elements have associated labels
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-*]` attributes match their roles
Document has a `<title>` element
The page contains a heading, skip link, or landmark region
`[role]` values are valid
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`<html>` element has a `[lang]` attribute
`[aria-*]` attributes are valid and not misspelled
No element has a `[tabindex]` value greater than 0
`[aria-*]` attributes have valid values
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` is not present on the document `<body>`
`<html>` element has a valid value for its `[lang]` attribute
`[id]` attributes on active, focusable elements are unique
`[role]`s have all required `[aria-*]` attributes
`[role]`s are contained by their required parent element
Mobile Usability
100/100
These checks validate how easily a visitor can use noaa.gov on a mobile device. Test results include a list of any mobile usability problems. Mobile usability problems are issues that can affect a user that visits the page on a mobile (small screen) device, including small font sizes (which are hard to read on a small screen).
Passed Audits (5)
Avoid plugins
Configure the viewport
Size content to viewport
Size tap targets appropriately
Use legible font sizes
Mobile Speed
30/100
These checks analyze the performance of noaa.gov on mobile devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (5)
Optimize images
Enable compression
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Minify JavaScript
Passed Audits (5)
Avoid landing page redirects
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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