Red flag warning for San Juan until Sunday night – gusts reaching 50 mph

Published Jun 28, 2026

A red flag warning was released by the National Weather Service on Sunday at 8:25 a.m. valid between noon and 10 p.m. for Northern San Juan.

The NWS states that the warning was issued for gusty winds, low relative humidity and dry fuels. Residents can expect winds to be southwest 20 to 30 mph with gusts up to 50 mph and relative humidity 10 to 15%.

“Several large wildfires developed across the region yesterday and exhibited extreme wildfire behavior. Atmospheric conditions are on track to be similar today as yesterday, and thus rapid wildfire spread will again be possible. The most concerning conditions are generally located near current wildfires, but any new wildfire development will also be capable of extreme behavior,” according to the NWS. “Extreme fire danger is expected. Fires will spread uncontrollably and could be very destructive.”

What is the significance of a red flag warning?

A red flag warning signifies that either extreme fire weather conditions are currently in effect or will be shortly, as stated by the NWS. Warm temperatures, very low humidities, and stronger winds are expected to combine to produce an increased risk of fire to spread rapidly.

What should you do under a red flag warning?

A red flag warning demands vigilance and immediate readiness to respond to potential fires. The NWS provides these vital guidelines to minimize fire hazards and ensure your safety:

1. Secure burn barrels:

If burning is authorized in your vicinity, ensure that all burn barrels feature a weighted metal cover with holes no larger than 3/4 of an inch.

2. Mindful disposal of smoking materials:

Prudently discard cigarette butts and avoid flinging cigarettes or matches from a moving vehicle. These seemingly innocuous actions can kindle dry grass, potentially triggering a wildfire.

3. Properly extinguish outdoor fires:

To safeguard against accidental fires, diligently extinguish all outdoor fires. Drown them with an ample amount of water and stir to confirm that everything is cold to the touch. Submerge charcoal in water until it’s thoroughly cooled. Never dispose of live charcoal on the ground.

4. Never leave fires unattended:

Avoid leaving any fire unattended. Even sparks or embers carried by the wind can ignite nearby leaves or grass, triggering a fire that spreads rapidly.

Understanding the gravity of a red flag warning and adhering to these precautions is paramount in averting wildfires during these perilous conditions. Prioritize safety, stay impeccably informed, and assume responsibility to shield lives and property.

Source: The National Weather Service