Alert archive / Colorado / Red Flag Warnings in 2021

Red Flag Warning 4, NWS Denver/Boulder, CO

March 9, 2021Elbert County, Lincoln County, Colorado

NWS Denver/Boulder, CO issued this red flag warning at Mar 9, 2021, 2:32 PM MST for Elbert County, Lincoln County, Colorado. It took effect at Mar 10, 2021, 11:00 AM MST. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Mar 9, 2021, 2:32 PM MST (21:32 UTC)
In effect from: Mar 10, 2021, 11:00 AM MST
Expired: Mar 10, 2021, 5:00 PM MST
In force: 6 hr
Issued by: NWS Denver/Boulder, CO

Counties Elbert County, CO, Lincoln County, CO

The radar

The Pueblo radar (KPUX), 81 km from the middle of the area, began a volume at 21:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.5 hours before the alert went out and 96 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2948 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

579 
WWUS85 KBOU 092132
RFWBOU

URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
232 PM MST Tue Mar 9 2021

COZ247-101300-
/O.UPG.KBOU.FW.A.0001.210310T1800Z-210311T0100Z/
/O.NEW.KBOU.FW.W.0004.210310T1800Z-210311T0000Z/
Southeast Elbert County Below 6000 Feet/South Lincoln County-
232 PM MST Tue Mar 9 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 5 PM MST WEDNESDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHERN LINCOLN COUNTY... 

The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM to 5 PM MST Wednesday. The Fire Weather Watch is no
longer in effect.

* Affected Area...Fire Weather Zone 247.

* Timing...11 AM to 5 PM MST Wednesday.

* Winds...West 20 to 30 mph with gusts up to 40 mph.

* Relative Humidity...As low as 12 percent.

* Impacts...Strong winds combined with low relative humidity may 
  cause new fire starts to rapidly spread and grow.

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.

&&

$$

COZ246-101300-
/O.NEW.KBOU.FW.W.0004.210310T1800Z-210311T0000Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
232 PM MST Tue Mar 9 2021

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 5 PM MST WEDNESDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND NORTHERN
LINCOLN COUNTIES...

The National Weather Service in Denver has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from 11 AM to 5 PM MST Wednesday.

* Affected Area...Fire Weather Zone 246.

* Timing...11 AM to 5 PM MST Wednesday.

* Winds...West 15 to 25 mph with gusts up to 40 mph.

* Relative Humidity...As low as 14 percent.

* Impacts...Strong winds combined with low relative humidity may
  cause new fire starts to rapidly spread and grow.

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.

&&

$$

3 follow-up statements

403 
WWUS85 KBOU 100256
RFWBOU

URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
756 PM MST Tue Mar 9 2021

COZ246-247-101100-
/O.CON.KBOU.FW.W.0004.210310T1800Z-210311T0000Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
756 PM MST Tue Mar 9 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 5 PM MST
WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT
AND NORTHERN LINCOLN COUNTIES...

* Affected Area...Fire Weather Zones 246 and 247.

* Timing...11 AM to 5 PM MST Wednesday.

* Winds...West 20 to 25 mph with gusts up to 40 mph.

* Relative Humidity...As low as 13 percent.

* Impacts...Strong winds combined with low relative humidity may 
  cause new fire starts to rapidly spread and grow.

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.

&&

$$

259 
WWUS85 KBOU 100939
RFWBOU

URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
239 AM MST Wed Mar 10 2021

COZ246-247-110000-
/O.CON.KBOU.FW.W.0004.210310T1800Z-210311T0000Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
239 AM MST Wed Mar 10 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR
EASTERN ELBERT AND NORTHERN LINCOLN COUNTIES...

* Affected Area...Fire Weather Zones 246 and 247.

* Timing...11 AM to 5 PM MST Today.

* Winds...West 20 to 30 mph with gusts up to 40 mph.

* Relative Humidity...As low as 10 percent.

* Impacts...Strong winds combined with low relative humidity may 
  cause new fire starts to rapidly spread and grow.

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.

&&

$$

748 
WWUS85 KBOU 101816
RFWBOU

URGENT - FIRE WEATHER MESSAGE
National Weather Service Denver/Boulder CO
1116 AM MST Wed Mar 10 2021


COZ246-247-110000-
/O.CON.KBOU.FW.W.0004.000000T0000Z-210311T0000Z/
North and Northeast Elbert County Below 6000 Feet/North Lincoln
County-
Southeast Elbert County Below 6000 Feet/South Lincoln County-
1116 AM MST Wed Mar 10 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT
AND LINCOLN COUNTIES...

* Affected Area...Fire Weather Zones 246 and 247.

* Timing...11 AM to 5 PM MST Today.

* Winds...West 20 to 30 mph with gusts up to 45 mph.

* Relative Humidity...As low as 11 percent.

* Impacts...Strong winds combined with low relative humidity may 
  cause new fire starts to rapidly spread and grow.

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.

&&

$$

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 9, 2:40 AM MST	Winter Weather Advisory	BOU	Boulder, Grand, Jackson, Larimer	38 hr
Mar 9, 2:53 AM MST	Fire Weather Watch	BOU	Elbert, Lincoln	12 hr

Nearby

Red Flag Warnings in Colorado, 2021 Every red flag warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.