spaceweather.gov

https://spaceweather.gov· First analyzed 12 May 2026· Updated 12 May 2026

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spaceweather.gov

Mobile

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Hosting Provider

National Oceanic and Atmospheric Administration

IP Address

137.75.88.52

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Riverdale Park, United States

ASN

AS3477

Organization

National Oceanic and Atmospheric Administration

Server

Apache

CDN

CloudFront

Nameservers

ns-03.noaa.gov.ns-02.noaa.gov.ns-01.noaa.gov.

Performance

Core Web Vitals

Weight

First Contentful Paint

862 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

4.5 MB

131 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

Drupal

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Technology Stack

9 Technologies Detected

CSS Frameworks

Libraries

Analytics

Other

Web Servers

SEO Analysis

D59/100

Meta Tags10/15

Content11/12

Headings3/8

Technical16/25

E-E-A-T0/7

Images5/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

spaceweather.govspaceweather.gov

Homepage | NOAA / NWS Space Weather Prediction Center

No description available for this page.

Title Length53 chars

Recommended: 50-60 chars (~333px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

10 issues found

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Crawlability

Sitemap

robots.txt

53 rules

Local SEO

Local Search Readiness

6/100

Poor

2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

D40/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

10/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:5%

Words:1,129

Token eff.:Optimal

Sections/1K:0.9

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary17w

Descriptive Headingsavg 2w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

80/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

13/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

13/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

16/100

567 mg

CO₂e / view

4.5 MB

Page Weight

15%

Cleaner Than

New Visitor

648 mg

Returning (cached)

324 mg

Annual (10K/mo)

68.0 kg

Emission Segments

Data Center

127 mg

Network

136 mg

Device

304 mg

Resource Breakdown

JavaScript

224.9 KB

Images

4.1 MB

CSS

140.7 KB

HTML

19.5 KB

Green Hosting Not Verified

National Oceanic and Atmospheric Administration

8 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

91%Excellent

Static / Informational

HTTPS

No WAF

62d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

16.06.2025

Valid Until

13.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.spaceweather.gov

SHA-256 Fingerprint

CA:73:CB:60:CB:2A:CD:D8:63:4B:04:02:ED:A0:8E:46:19:DC:44:F7...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-origin

www.swpc.noaa.gov, www.spaceweather.gov, services.swpc.noaa....

age

cache-control

🔴 No Cache(must-revalidate, no-cache, private)

content-encoding

📦 Gzip(gzip)

content-language

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

spaceweather.gov

Domain Age

27y 6m

Created

29.10.1998

Expires

19.08.2026

Last Updated

24.08.2025

Registrar

get.gov

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

64/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

helvetica

WCAG AAA

57/100

Readability

/30

16/30

12px · LH 1.50

Hierarchy

/20

6/20

WCAG

/25

20/25

7.35:1 min contrast

Performance

/25

15/25

1 font · 1 req

Heading Font

helvetica

Sans

Body Font

helvetica

Sans12px

Contrast Ratio

7.35:1

WCAG AAA (≥7:1)

Reading Comfort

Single Font Family

left aligned

32px

12px

❌ Critical: 12px body text is too small. Minimum 14px, recommend 16px+.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.3:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFonts

Color Palette

9 unique colors

21:1 AAA Light

#ffffff

Background· 27.7%

#000000

Text· 12.3%

#2e6384

Primary· 7%

#003562

Accent· 4.5%

#7d99a6

Secondary· 4.4%

#0d283f

Accent· 3.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)code.highcharts.com(4)dap.digitalgov.gov(2)googletagmanager.com(1)

Website Identity

spaceweather.gov

27 years old

Location detected: 🇺🇸 United Statesvia ip

get.goven

Social Profiles

Facebook X (Twitter)

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Last analyzed: 12 May 2026 at 00:07

Historical Analysis & Change Tracking