Red Flag Warning issued December 18 at 5:08PM MST until December 20 at 12:00AM MST by NWS Denver CO
...THIS IS A PARTICULARLY DANGEROUS SITUATION FOR IN AND IMMEDIATELY
ADJACENT TO THE FOOTHILLS, BETWEEN 5500 AND 9000 FEET, FOR BOULDER
AND JEFFERSON COUNTIES ON FRIDAY...
Strong west winds, sustained 45-55 mph with gusts upwards of 85-105
mph, are expected in the foothills of Boulder and Jefferson Counties
beginning early Friday morning. Relative humidity values are
expected to drop into the low teens, possibly upper single digits.
While Red Flag conditions, critical fire weather, are expected
across a larger area in northern Colorado, the most extreme
conditions are expected to be along Highway 93 from Jefferson County
into Boulder County and along US-36 north of Boulder to the Larimer
County line and westward. There will be a high potential for fast
moving wildfires, should any new starts occur.
Winds toward I-25 and eastward will be slower to develop, and also
speeds will be considerably lighter. That said, gusts of 25-40 mph
are still expected to combine with very low humidity and cured
grasses to support critical fire weather conditions. Areas farther
east into eastern Adams, Arapahoe, Elbert, and Lincoln counties have
more uncertainty if those winds even develop, so those locations
remain under a Fire Weather Watch.
Such conditions may be a longer duration than usual, with potential
for low humidity to extend well into the evening hours.
* AFFECTED AREA...Fire Weather Zone 239.
* TIMING...From 10 AM Friday to midnight MST Friday night.
* WINDS...West 30 to 40 mph with gusts up to 80 mph or more
immediately next to the foothills.
* RELATIVE HUMIDITY...As low as 8 percent.
* IMPACTS...Conditions will be favorable for rapid fire spread.
Avoid outdoor burning and any activity that may produce a spark
and start a wildfire.
This is a Particularly Dangerous Situation that poses a significant
threat to life and property in the event of a wildfire start.
Residents are urged to assemble an emergency supply kit and know
their evacuation routes. In some cases, safe and timely evacuation
may not be possible should a fire approach. Have multiple ways to
receive instructions from emergency services, and evacuate if
ordered to or if a fire threatens.
Varoitus voimassa pe klo 19:00 - la klo 9:00
