Critical fire weather: Dixie, southern Nevada, northwestern AZ

WASHINGTON COUNTY – The National Weather Service has issued separate “Red Flag Warnings” for areas encompassing Southwestern Utah including St. George, Southern Nevada including Mesquite and Las Vegas, as well as Northwestern Arizona. These critical fire weather conditions are in effect from Monday afternoon into Monday night.

Dots denote affected area at radar time 9:20 a.m., Washington County, Utah, June 2, 2014 | Image courtesy of the National Weather
Dots denote affected area at radar time 9:20 a.m., Washington County, Utah, June 2, 2014 | Image courtesy of the National Weather Service

Affected areas

  • Much of Washington County – Fire Weather Zone 497 – Mojave Desert (see map insert).
  • Most of southern Nevada, and northwestern Arizona including Lake Mead National Recreation Area, northwest desert and plateaus, the Colorado River Valley, Lincoln County and Clark County (see map  insert below)
  • Most of the Kaibab National Forest including the Williams and Tusayan ranger districts 

Time frames

  • Washington County: Noon-10 p.m. Monday
  • Southern Nevada and northwestern Arizona: Noon-9 p.m. Monday
  • Kaibab National Forest: 2-8 p.m. Monday

Winds

  • Washington County: South 20-30 mph with gusts up to 40 mph will continue into this evening and relax by 10 p.m.
  • Southern Nevada and northwest Arizona: Southwest winds 20-30 mph with gusts 30-40 mph
  • Kaibab National Forest: Southwest winds 20-30 mph with gusts 30-40 mph

Relative humidity

  • Washington County: As low as 6 to 8 percent this afternoon and evening.
  • Southern Nevada and northwest Arizona: Relative humidities will drop below 10 percent.
  • Kaibab National Forest: Below 10 percent

Impacts

The combination of strong winds, low relative humidity and dry fuels will create conditions that are favorable for extreme fire behavior.

Dots denote affected area at radar time 8:10 a.m. PDT, Nevada, Arizona, June 2, 2014 | Image courtesy of the National Weather Service
Dots denote affected area at radar time 8:10 a.m. PDT, Nevada, Arizona, June 2, 2014 | Image courtesy of the National Weather Service

Precautionary, preparedness actions

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.

Fire restrictions
The Williams and Tusayan ranger districts of the Kaibab National Forest are under Stage II fire restrictions, which prohibit campfires everywhere.  However, the North Kaibab Ranger District has not yet implemented any fire restrictions due to different weather and fuels conditions.
For the duration of the Red Flag Warning, visitors to the North Kaibab Ranger District are advised to refrain from having a campfire.  This advisory covers all campfires across the district, including in developed campgrounds.

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