National Weather Service United States Department of Commerce

St. Louis, MO

Weather Forecast Office

Red Flag Warning and Elevated Fire Danger Criteria

Weather.gov > St. Louis, MO > Red Flag Warning and Elevated Fire Danger Criteria

All three of the following criteria must be exceeded in order for Red Flag Warning conditions to be met:

  • Sustained 20 ft Winds: >15 mph
  • Relative Humidity: < 25%
  • 10 hr Dead Fuel Moisture: <9%

Below is a matrix that describes the Elevated Fire Danger criteria:

Elevated fire danger matrix for the St. Louis forecast area.

Follow us on Twitter  Follow us on Twitter
Follow us on Facebook  Follow us on Facebook
Follow us on YouTube  Follow us on YouTube
LSX RSS Feed  LSX RSS Feed

CURRENT HAZARDS
Watches / Warnings
Submit Storm Report

CURRENT CONDITIONS
Observations
Snow Cover
Snowfall Analysis
Precip Analysis
Road Conditions

FORECAST
Forecaster's Discussion
Local area
Activity Planner
Aviation Weather
Fire Weather
Marine Weather
Severe Weather
Winter Weather
Hurricane Center
FAA Center Weather

CLIMATE
Local
CoCoRAHS
National
Drought
NOAA Climate Science
More...

Hydrology
Rivers and Lakes

Weather Safety
Weather Radio
NWS Storm Spotter Talks
Safety and Preparedness Information
StormReady
Weather-Ready Nation Ambassador Program

LOCAL PROGRAMS
About NWS St. Louis
Items of Interest
Education Resources
Coop Observer

Contact Us
Contact Info