A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Rapid Spread of Wildfire Continues through Late This Afternoon... Slowly diminishing but still gusty northwest winds over 25 mph will continue until 5 pm, along with relative humidity between 10 and 20 percent, across the Rio Grande Valley and Deep South Texas ranchlands. Winds will diminish rapidly just before sunset, ending the threat. ...RED FLAG WARNING NOW IN EFFECT UNTIL 6 PM CST THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND WINDS 15 TO 20 MPH WITH GUSTS 25 TO 30 MPH FOR ALL OF THE RIO GRANDE VALLEY AND DEEP SOUTH TEXAS EXCEPT THE BARRIER ISLAND... * AFFECTED AREA...All of the Rio Grande Valley and Deep South Texas Except the barrier island. * TIMING...Until 6 PM this afternoon. * WINDS...North 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * TEMPERATURES...Up to 67. * LIGHTNING...None. * IMPACTS...Rapid spread of wildfire on flash-dried grasses and brush is possible until winds diminish rapidly and humidity begins to rise.