What is a red flag warning? Iowa sees ‘very high to extreme’ fire danger Thursday

The majority of Iowa, including the Des Moines metro, is under a red flag warning for Thursday.

The warning runs from 11 a.m. to 7 p.m. and has been expanded to replace the previous fire weather watch, according to the National Weather Service.

What is a red flag warning?

Warm temperatures combined with low humidities and strong winds create an increased risk for fire danger. Red flag warnings are usually only issued in the spring and fall weather seasons from Feb. 15 to April 30 and Oct. 1 to Dec. 15, according to the National Weather Service.

Where is the Red Flag warning in Iowa?

High wind gusts from 35 mph to 45 mph west and north of the Des Moines metro will create “very high to extreme fire danger conditions,” according to the National Weather Service. Humidity will be quite low, ranging from 15% to 25%. Des Moines is expected to see a peak humidity point of 22% and winds at 31 mph.

Is a red flag warning a burn ban in Iowa?

Red flag warnings are issued by the National Weather Service. Meteorologists strongly advise against starting fires, but cannot ban them.

Individual counties or cities may issue burn bans. Polk, Story and Johnson counties were among the 59 counties with burn bans active as of 8:45 a.m. Thursday. The Iowa State Fire Marshall’s Office maintains an interactive map of all active burn bans.

Safety practices you should take during red flag warnings

• In areas that permit burning, all burn barrels must be covered with a weighted metal cover with holes no larger than 3/4 of an inch.
• Do not throw away cigarettes or matches while driving. This could ignite dry vegetation.
• Properly extinguish outdoor fires by drowning it with plenty of water, and never leave a fire unattended.

Kate Kealey is a general assignment reporter for the Des Moines Register. Reach her at kkealey@registermedia.com or follow her on Twitter at @Kkealey17.