Cloud Seeding in Florida: Statute 403.411, Penalties, and Reporting

Cloud seeding in Florida is illegal. As of July 1, 2025, releasing any chemical, compound, substance, or apparatus into the atmosphere over Florida for the purpose of affecting temperature, weather, climate, or sunlight intensity is a third-degree felony punishable by up to five years in state prison and fines as high as $100,000 per violation.¹ Governor Ron DeSantis signed Senate Bill 56 into law on June 20, 2025.²

What Florida Statute 403.411 Prohibits

The law bans both traditional cloud seeding and broader geoengineering techniques such as solar radiation management. It applies to any person or entity operating within Florida’s borders.¹ There are no listed exceptions in the statute. Research, agriculture, drought relief, and academic study are not carved out.

The scope is broad in what activities it names, but narrow in one important way: it applies only to atmospheric releases done for the express purpose of altering weather, climate, temperature, or sunlight.

The Express Purpose Requirement

The “express purpose” language is an intent element, and it does real work.¹ Ordinary jet contrails, agricultural crop dusting, mosquito control spraying, and industrial emissions all release substances into the air, but none of those activities aim to alter the weather. A prosecution has to show that weather or climate modification was the defendant’s purpose, not just that an atmospheric release occurred.

Where this matters is at the edges. A researcher releasing silver iodide only to study dispersion, with no rain-making intent, might fall outside the ban. Anyone dispersing seeding agents into a rain cloud will have a difficult time arguing that weather modification was not the point.

Penalties for a Violation

Every violation is a third-degree felony, which under Florida’s general felony statute carries up to five years in state prison.³ Section 403.411 sets its own fine schedule, well above the usual $5,000 cap for third-degree felonies:¹

Individuals and corporations face fines up to $100,000 per violation.
Corporate officers, directors, and employees face fines up to $100,000 per violation.
Aircraft operators or controllers face fines up to $5,000 per violation, plus up to five years in prison.

Each separate act counts as its own offense, so repeated conduct stacks. Fine revenue goes into Florida’s Air Pollution Control Trust Fund.

How to Report a Suspected Violation

The Florida Department of Environmental Protection oversees enforcement. Anyone who observes a suspected violation can report it to DEP online, by phone, by mail, or by email.¹ DEP has to maintain a public email address and online form for these reports, screen the incoming tips, and investigate any that warrant further review.

The agency launched a portal called Clear Skies for this purpose. DEP can refer reports to the Department of Health or the Division of Emergency Management when appropriate.⁴

Airport Reporting Obligations

SB 56 also created a monthly reporting duty for airports. Operators of publicly owned airports must submit reports to the Florida Department of Transportation identifying any aircraft on their premises equipped with weather modification or geoengineering devices.² That requirement took effect alongside the felony ban on July 1, 2025. As of late 2025, airport reports across the state showed no such equipment present at any public facility.

What Changed From the Old Law

Before SB 56, Florida regulated weather modification through a licensing system rather than a ban. The prior version of Section 403.411 made it a second-degree misdemeanor to operate without a license, file false application information, or skip required reports, with penalties capped at 60 days in jail.⁵

The licensing framework was dormant. DEP confirmed it had never received a single application, and never issued a license, since the original statute took effect in 1957. SB 56 repealed the licensing scheme and replaced it with the current felony ban.²

Federal Rules Still Apply Separately

Florida’s ban sits on top of a federal reporting framework, not in place of it. The Weather Modification Reporting Act of 1972 requires anyone conducting weather modification anywhere in the United States to notify the Secretary of Commerce at least 10 days before starting, with reports going to NOAA. Failing to report carries a federal fine of up to $10,000.⁶

The federal law does not prohibit weather modification. It requires disclosure. Cloud seeding remains legal in several western states, where operators file federal reports alongside their state permits. Florida is stricter than the federal baseline: the activity itself is a crime, not just an unreported activity.

1
Florida Senate. Florida Statutes 403.411 – Geoengineering and Weather Modification Activities Prohibited; Penalty
2
Executive Office of the Governor. Governor Ron DeSantis Celebrates Action to Protect Floridians from Chemical and Technological Interference
3
The Florida Legislature. Florida Statutes Title XLVII Chapter 775 – Definitions; General Penalties; Registration of Convicted Felons
4
Florida Department of Environmental Protection. About Public Notice of Pollution
5
Justia Law. Florida Statutes 403.411 (2017) – Penalty
6
NOAA Library. Weather Modification Project Reports