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https://accuweather.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
2
REVIEW
6
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
69
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

778 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

928 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

22 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.30 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.64 s

Page Load Progression

483 ms
966 ms
1.4 s
1.9 s
2.4 s
2.9 s
3.4 s
3.9 s
Checks
15
5 PASS 6 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.1 MB transferred, 63 requests
REVIEW
1.1 MB transferred, 63 requests
Info::
Page weighs 6.2 MB (1.1 MB transferred)
Warning::
JavaScript is 738 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 738 KB
Info::
63 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
63 requests
0.23 g CO2 per page load
JavaScript 737.9 KiB 65%
Images 149.9 KiB 13%
Other 88.9 KiB 8%
HTML 48.9 KiB 4%
Other 39.0 KiB 3%
Other 33.1 KiB 3%
Fonts 22.7 KiB 2%
CSS 20.7 KiB 2%
Other 355 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

C
Image Optimization
Action
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Warning::
https://www.awxcdn.com/adc-assets/images/icons/ico... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://api.accuweather.com/maps/v1/radar/static/g... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
15 images 150 KB
0 oversized -0 KB
9 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
920ms total JS execution
REVIEW
920ms total JS execution
Warning::
https://www.accuweather.com/: 371ms CPU time
Info::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 183ms CPU time
Info::
Unattributable: 171ms CPU time
Info::
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=16...: 79ms CPU time
Info::
https://securepubads.g.doubleclick.net/pagead/mana...: 63ms CPU time
Warning::
Third-party scripts: 920ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 24% Rendering 10% Style & Layout 10% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.accuweather.com/371ms46ms9ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js183ms136ms31ms3rd
Unattributable171ms50ms0ms3rd
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=16if7iQ5tgH1FcRA4cUeejyVcdf5guIAEV9R79ms70ms4ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604130101/pubads_impl.js63ms47ms12ms3rd
https://www.accuweather.com/akam/13/26139ab152ms45ms1ms3rd
C
JS Bundles
Action
22 scripts, 282 KB unused
REVIEW
22 scripts, 282 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 128 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 105 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.accuweather.com/tags/shared/triplelift...: 48 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 282 KB
282 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604130101/pubads_impl.js188 KB128 KB (69%)✓3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js257 KB105 KB (41%)✓3rd
https://www.accuweather.com/tags/shared/tripleliftBidAdapter-cb2ab4c9.js69 KB48 KB (71%)✓3rd
https://www.awxcdn.com/adc-assets/bundles/7765.9742517af0f60e4af297.js11 KB—✓3rd
https://global.ketchcdn.com/web/v3/config/accuweather/website_smart_tag/boot.js5 KB—✓3rd
https://www.accuweather.com/tags/shared/yahooAdsBidAdapter-420837aa.js8 KB—✓3rd
https://www.accuweather.com/tags/shared/connatixBidAdapter-438668ad.js22 KB—✓3rd
https://www.accuweather.com/tags/shared/percentInView-a9b42891.js1 KB—✓3rd
https://securepubads.g.doubleclick.net/tag/js/gpt.js34 KB—✓3rd
https://www.awxcdn.com/adc-assets/bundles/home.home-desktop.0307b4dab69aa607be6d.js4 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
63 resources · 1.1 MB · 282 KB savings available
REVIEW
63 resources · 1.1 MB · 282 KB savings available
Warning::
Page weight 117 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~282 KB of savings available
Warning::
62 third-party resources (100% of weight)
Info::
1 resources over 200KB
63 resources · 1.1 MiB · 62 third-party 117.5 KiB over 1MB target
JavaScript 65% · 737.9 KiB
Image 14% · 165.4 KiB
Other 13% · 144.7 KiB
Document 4% · 50.1 KiB
Font 2% · 22.7 KiB
CSS 2% · 20.7 KiB

~282.0 KiB of savings available

Remove unused JavaScript: 282.0 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
1 fonts (23 KB)
PASS
1 fonts (23 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

23 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 778 ms LCP 928 mshttps://www.accuweather.com/fonts/Solis-Regular.woff2Solis-Regular.woff2 https://www.accuweather.com/fonts/Solis-Regular.woff2 — 22.7 KiB — 21 ms — font-display: swap
Solis-Regular.woff2 woff2 swap
Size 23 KB
Load time 21 ms
Start 358 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
63 requests over 3329ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 778 ms LCP 928 mshttps://accuweather.com// https://accuweather.com/ — 301 — 114 B — 37 ms — h2https://www.accuweather.com/www.accuweather.com/ https://www.accuweather.com/ — 200 — 48.1 KiB — 312 ms — h2https://www.accuweather.com/fonts/Solis-Regular.woff2www.accuweather.com/fonts/Solis-Reg... https://www.accuweather.com/fonts/Solis-Regular.woff2 — 200 — 22.7 KiB — 21 ms — h2https://www.accuweather.com/tags/common/ketch/ketch-2d5abe96.csswww.accuweather.com/tags/common/ket... https://www.accuweather.com/tags/common/ketch/ketch-2d5abe96.css — 200 — 417 B — 11 ms — h2https://www.accuweather.com/tags/shared/prebid/prebid-a-7411b6f1.jswww.accuweather.com/tags/shared/pre... https://www.accuweather.com/tags/shared/prebid/prebid-a-7411b6f1.js — 200 — 621 B — 18 ms — h2https://www.awxcdn.com/adc-assets/bundles/7773.b5b320cbddaaa39d3ba3.csswww.awxcdn.com/adc-assets/bundles/7... https://www.awxcdn.com/adc-assets/bundles/7773.b5b320cbddaaa39d3ba3.css — 200 — 6.7 KiB — 21 ms — h2https://www.awxcdn.com/adc-assets/bundles/4207.67441d56684b2bca10e9.csswww.awxcdn.com/adc-assets/bundles/4... https://www.awxcdn.com/adc-assets/bundles/4207.67441d56684b2bca10e9.css — 200 — 7.6 KiB — 30 ms — h2https://www.awxcdn.com/adc-assets/bundles/legacy-header.db68efe94cf86bd9e422.csswww.awxcdn.com/adc-assets/bundles/l... https://www.awxcdn.com/adc-assets/bundles/legacy-header.db68efe94cf86bd9e422.css — 200 — 6.0 KiB — 30 ms — h2https://www.accuweather.com/images/weathericons/v2a/01.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/01.svg — 200 — 1.5 KiB — 16 ms — h2https://www.accuweather.com/images/weathericons/v2a/06.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/06.svg — 200 — 1.1 KiB — 18 ms — h2https://www.accuweather.com/images/weathericons/v2a/02.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/02.svg — 200 — 1.7 KiB — 9 ms — h2https://www.accuweather.com/tags/shared/tripleliftBidAdapter-cb2ab4c9.jswww.accuweather.com/tags/shared/tri... https://www.accuweather.com/tags/shared/tripleliftBidAdapter-cb2ab4c9.js — 200 — 68.6 KiB — 12 ms — h2https://www.accuweather.com/tags/shared/ixBidAdapter-e9eded03.jswww.accuweather.com/tags/shared/ixB... https://www.accuweather.com/tags/shared/ixBidAdapter-e9eded03.js — 200 — 8.9 KiB — 20 ms — h2https://www.accuweather.com/tags/shared/appnexusBidAdapter-298757d1.jswww.accuweather.com/tags/shared/app... https://www.accuweather.com/tags/shared/appnexusBidAdapter-298757d1.js — 200 — 8.8 KiB — 22 ms — h2https://www.accuweather.com/tags/shared/ttdBidAdapter-a0b8eff8.jswww.accuweather.com/tags/shared/ttd... https://www.accuweather.com/tags/shared/ttdBidAdapter-a0b8eff8.js — 200 — 9.8 KiB — 23 ms — h2https://www.accuweather.com/tags/shared/yahooAdsBidAdapter-420837aa.jswww.accuweather.com/tags/shared/yah... https://www.accuweather.com/tags/shared/yahooAdsBidAdapter-420837aa.js — 200 — 7.9 KiB — 16 ms — h2https://www.accuweather.com/tags/shared/connatixBidAdapter-438668ad.jswww.accuweather.com/tags/shared/con... https://www.accuweather.com/tags/shared/connatixBidAdapter-438668ad.js — 200 — 22.4 KiB — 16 ms — h2https://www.accuweather.com/tags/shared/percentInView-a9b42891.jswww.accuweather.com/tags/shared/per... https://www.accuweather.com/tags/shared/percentInView-a9b42891.js — 200 — 960 B — 17 ms — h2https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 34.2 KiB — 172 ms — h3https://www.awxcdn.com/adc-assets/bundles/home.home-desktop.0307b4dab69aa607be6d.jswww.awxcdn.com/adc-assets/bundles/h... https://www.awxcdn.com/adc-assets/bundles/home.home-desktop.0307b4dab69aa607be6d.js — 200 — 4.1 KiB — 16 ms — h2https://www.awxcdn.com/adc-assets/bundles/7765.9742517af0f60e4af297.jswww.awxcdn.com/adc-assets/bundles/7... https://www.awxcdn.com/adc-assets/bundles/7765.9742517af0f60e4af297.js — 200 — 11.5 KiB — 19 ms — h2https://www.awxcdn.com/adc-assets/bundles/legacy-header.59998cf2e2a578ed27b9.jswww.awxcdn.com/adc-assets/bundles/l... https://www.awxcdn.com/adc-assets/bundles/legacy-header.59998cf2e2a578ed27b9.js — 200 — 8.0 KiB — 20 ms — h2https://global.ketchcdn.com/web/v3/config/accuweather/website_smart_tag/boot.jsglobal.ketchcdn.com/web/v3/config/a... https://global.ketchcdn.com/web/v3/config/accuweather/website_smart_tag/boot.js — 200 — 4.9 KiB — 37 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJAQMAAAAB5D5xAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQ…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJAQMAAAAB5D5xAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQ… — 200 — 0 B — 0 ms — datahttps://experiments.parsely.com/vip-experiments.js?apiKey=accuweather.comexperiments.parsely.com/vip-experim... https://experiments.parsely.com/vip-experiments.js?apiKey=accuweather.com — 200 — 9.0 KiB — 37 ms — h2https://www.accuweather.com/akam/13/26139ab1www.accuweather.com/akam/13/26139ab... https://www.accuweather.com/akam/13/26139ab1 — 200 — 9.3 KiB — 14 ms — h2https://www.accuweather.com/images/weathericons/v2a/04.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/04.svg — 200 — 1.5 KiB — 20 ms — h2https://www.accuweather.com/tags/common/body/ad-script-3333932b.jswww.accuweather.com/tags/common/bod... https://www.accuweather.com/tags/common/body/ad-script-3333932b.js — 200 — 4.7 KiB — 22 ms — h2https://www.awxcdn.com/adc-assets/images/hero/6/1440x450.jpgwww.awxcdn.com/adc-assets/images/he... https://www.awxcdn.com/adc-assets/images/hero/6/1440x450.jpg — 200 — 62.4 KiB — 20 ms — h2https://www.accuweather.com/tags/glacier/body/search-bar-ad-5d1d21c7.jswww.accuweather.com/tags/glacier/bo... https://www.accuweather.com/tags/glacier/body/search-bar-ad-5d1d21c7.js — 200 — 886 B — 18 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 778 ms LCP 928 mshttps://accuweather.com// https://accuweather.com/ — 301 — 114 B — 37 ms — h2https://www.accuweather.com/www.accuweather.com/ https://www.accuweather.com/ — 200 — 48.1 KiB — 312 ms — h2https://www.accuweather.com/fonts/Solis-Regular.woff2www.accuweather.com/fonts/Solis-Reg... https://www.accuweather.com/fonts/Solis-Regular.woff2 — 200 — 22.7 KiB — 21 ms — h2https://www.accuweather.com/tags/common/ketch/ketch-2d5abe96.csswww.accuweather.com/tags/common/ket... https://www.accuweather.com/tags/common/ketch/ketch-2d5abe96.css — 200 — 417 B — 11 ms — h2https://www.accuweather.com/tags/shared/prebid/prebid-a-7411b6f1.jswww.accuweather.com/tags/shared/pre... https://www.accuweather.com/tags/shared/prebid/prebid-a-7411b6f1.js — 200 — 621 B — 18 ms — h2https://www.awxcdn.com/adc-assets/bundles/7773.b5b320cbddaaa39d3ba3.csswww.awxcdn.com/adc-assets/bundles/7... https://www.awxcdn.com/adc-assets/bundles/7773.b5b320cbddaaa39d3ba3.css — 200 — 6.7 KiB — 21 ms — h2https://www.awxcdn.com/adc-assets/bundles/4207.67441d56684b2bca10e9.csswww.awxcdn.com/adc-assets/bundles/4... https://www.awxcdn.com/adc-assets/bundles/4207.67441d56684b2bca10e9.css — 200 — 7.6 KiB — 30 ms — h2https://www.awxcdn.com/adc-assets/bundles/legacy-header.db68efe94cf86bd9e422.csswww.awxcdn.com/adc-assets/bundles/l... https://www.awxcdn.com/adc-assets/bundles/legacy-header.db68efe94cf86bd9e422.css — 200 — 6.0 KiB — 30 ms — h2https://www.accuweather.com/images/weathericons/v2a/01.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/01.svg — 200 — 1.5 KiB — 16 ms — h2https://www.accuweather.com/images/weathericons/v2a/06.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/06.svg — 200 — 1.1 KiB — 18 ms — h2https://www.accuweather.com/images/weathericons/v2a/02.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/02.svg — 200 — 1.7 KiB — 9 ms — h2https://www.accuweather.com/tags/shared/tripleliftBidAdapter-cb2ab4c9.jswww.accuweather.com/tags/shared/tri... https://www.accuweather.com/tags/shared/tripleliftBidAdapter-cb2ab4c9.js — 200 — 68.6 KiB — 12 ms — h2https://www.accuweather.com/tags/shared/ixBidAdapter-e9eded03.jswww.accuweather.com/tags/shared/ixB... https://www.accuweather.com/tags/shared/ixBidAdapter-e9eded03.js — 200 — 8.9 KiB — 20 ms — h2https://www.accuweather.com/tags/shared/appnexusBidAdapter-298757d1.jswww.accuweather.com/tags/shared/app... https://www.accuweather.com/tags/shared/appnexusBidAdapter-298757d1.js — 200 — 8.8 KiB — 22 ms — h2https://www.accuweather.com/tags/shared/ttdBidAdapter-a0b8eff8.jswww.accuweather.com/tags/shared/ttd... https://www.accuweather.com/tags/shared/ttdBidAdapter-a0b8eff8.js — 200 — 9.8 KiB — 23 ms — h2https://www.accuweather.com/tags/shared/yahooAdsBidAdapter-420837aa.jswww.accuweather.com/tags/shared/yah... https://www.accuweather.com/tags/shared/yahooAdsBidAdapter-420837aa.js — 200 — 7.9 KiB — 16 ms — h2https://www.accuweather.com/tags/shared/connatixBidAdapter-438668ad.jswww.accuweather.com/tags/shared/con... https://www.accuweather.com/tags/shared/connatixBidAdapter-438668ad.js — 200 — 22.4 KiB — 16 ms — h2https://www.accuweather.com/tags/shared/percentInView-a9b42891.jswww.accuweather.com/tags/shared/per... https://www.accuweather.com/tags/shared/percentInView-a9b42891.js — 200 — 960 B — 17 ms — h2https://securepubads.g.doubleclick.net/tag/js/gpt.jssecurepubads.g.doubleclick.net/tag/... https://securepubads.g.doubleclick.net/tag/js/gpt.js — 200 — 34.2 KiB — 172 ms — h3https://www.awxcdn.com/adc-assets/bundles/home.home-desktop.0307b4dab69aa607be6d.jswww.awxcdn.com/adc-assets/bundles/h... https://www.awxcdn.com/adc-assets/bundles/home.home-desktop.0307b4dab69aa607be6d.js — 200 — 4.1 KiB — 16 ms — h2https://www.awxcdn.com/adc-assets/bundles/7765.9742517af0f60e4af297.jswww.awxcdn.com/adc-assets/bundles/7... https://www.awxcdn.com/adc-assets/bundles/7765.9742517af0f60e4af297.js — 200 — 11.5 KiB — 19 ms — h2https://www.awxcdn.com/adc-assets/bundles/legacy-header.59998cf2e2a578ed27b9.jswww.awxcdn.com/adc-assets/bundles/l... https://www.awxcdn.com/adc-assets/bundles/legacy-header.59998cf2e2a578ed27b9.js — 200 — 8.0 KiB — 20 ms — h2https://global.ketchcdn.com/web/v3/config/accuweather/website_smart_tag/boot.jsglobal.ketchcdn.com/web/v3/config/a... https://global.ketchcdn.com/web/v3/config/accuweather/website_smart_tag/boot.js — 200 — 4.9 KiB — 37 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJAQMAAAAB5D5xAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQ…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJAQMAAAAB5D5xAAAAA1BMVEUAAACnej3aAAAAAXRSTlMAQ… — 200 — 0 B — 0 ms — datahttps://experiments.parsely.com/vip-experiments.js?apiKey=accuweather.comexperiments.parsely.com/vip-experim... https://experiments.parsely.com/vip-experiments.js?apiKey=accuweather.com — 200 — 9.0 KiB — 37 ms — h2https://www.accuweather.com/akam/13/26139ab1www.accuweather.com/akam/13/26139ab... https://www.accuweather.com/akam/13/26139ab1 — 200 — 9.3 KiB — 14 ms — h2https://www.accuweather.com/images/weathericons/v2a/04.svgwww.accuweather.com/images/weatheri... https://www.accuweather.com/images/weathericons/v2a/04.svg — 200 — 1.5 KiB — 20 ms — h2https://www.accuweather.com/tags/common/body/ad-script-3333932b.jswww.accuweather.com/tags/common/bod... https://www.accuweather.com/tags/common/body/ad-script-3333932b.js — 200 — 4.7 KiB — 22 ms — h2https://www.awxcdn.com/adc-assets/images/hero/6/1440x450.jpgwww.awxcdn.com/adc-assets/images/he... https://www.awxcdn.com/adc-assets/images/hero/6/1440x450.jpg — 200 — 62.4 KiB — 20 ms — h2https://www.accuweather.com/tags/glacier/body/search-bar-ad-5d1d21c7.jswww.accuweather.com/tags/glacier/bo... 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h3https://securepubads.g.doubleclick.net/gampad/adx?iu=/6581/web/es/video_player/news_info/country_home&sz=3x3&c=1776361810119&m=text/javascript&t=fdate%3D20260416%26lang%3Den-us%26ut%3D1%26advelvet%3D9%26bot%3D0%26pgview%3D1%26partner%3Daccuweather%26ufdb%3DLEND%26city%3DPalacio%26country%3DES%26state%3DMD%26dma%3Dnull%26key%3D305796%26region%3Deur%26lat%3D40.415%26lon%3D-3.714%26browser%3Dchrome%26connection%3Dhosted_vhigh_5000%26wx_seg%3D102100100%252C101100100%252C109101100%252C102103100%252C102101100%252C108102100%252C101105100%252C101104100%252C100108101%252C101101102%252C102102102%252C101108100%252C100114101%252C101103100%252C100111100%252C100106102%252C100114106%252C104100104%252C108104101%252C108103102%252C102104102%252C100109104%252C107103102%252C100114104%252C110101100%252C100114103%252C101102102%252C109105102%252C108100102%252C109102102%252C109103102%252C108101102%252C103100102%252C109100102%252C105100102%252C104101101%252C107100102%252C101106102%252C103101102%252C109106102%252C107101102%252C101107101%252C109104102%252C100114109%252C100114108%252C100109109%252C110100101%252C100113101%252C110100100%252C100114102%252C100114107%26cuhd%3D24%26cuhi%3D73%26cuuv%3D0%26cuwd%3D9%26cuwx%3D1%26realfeel%3D75%26pt%3D0%26userid%3Dactive%26userid3p%3Dactive%26sub%3Dfree%26auth%3Dfalse%26site%3Ddesktop%26hour%3D17%26viewport%3D1350x940%26iabctax%3DIAB15-10%252CIAB20-14%252C390%26from%3Dnull&ppid=890a8a819ce14c52b87980b362a9cee5&userid3p=activesecurepubads.g.doubleclick.net/gamp... 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— 200 — 4.9 KiB — 91 ms — h3https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 128 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 920ms · 547KB · $12/mo
www.accuweather.com
Other
Costly
Execution 371ms
Transfer 48 KB
Monthly Cost $5/mo
cdn.ketchjs.com
Other
Optional
Execution 183ms
Transfer 257 KB
Unused 41%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 171ms
Transfer 0 KB
Monthly Cost $2/mo
cdn.p-n.io
Other
Optional
Execution 79ms
Transfer 44 KB
Monthly Cost $1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 63ms
Transfer 188 KB
Unused 69%
Monthly Cost $1/mo
www.accuweather.com
Other
Optional
Execution 52ms
Transfer 9 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.accuweather.com adds 371ms and costs ~$5/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.accuweather.com takes 371ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

69% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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