Alert archive / Colorado / Red Flag Warnings in 2011

Red Flag Warning 28, NWS Denver/Boulder, CO

November 14, 201115 counties in Colorado

NWS Denver/Boulder, CO issued this red flag warning at Nov 14, 2011, 9:46 AM MST for 15 counties in Colorado. It took effect at Nov 14, 2011, 10:00 AM MST. It was in force for 7 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
Nov 14, 2011, 9:46 AM MST (16:46 UTC)
In effect from
Nov 14, 2011, 10:00 AM MST
Expired
Nov 14, 2011, 5:00 PM MST
In force
7 hr
Issued by
NWS Denver/Boulder, CO

Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 44 km from the middle of the area, began a volume at 16:47 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, 4.8 hours before the alert went out and 86 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2011-11-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2011-11-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 120 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
2945 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
120 m²/s²
0-3 km storm-relative helicity
267 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

425 
WWUS85 KBOU 141646
RFWBOU

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
946 AM MST MON NOV 14 2011

...FIRE DANGER INCREASING ACROSS THE PLAINS TODAY...

.GUSTY WEST WINDS WILL SPREAD ACROSS THE PLAINS THIS AFTERNOON AS
TEMPERATURES WARM INTO THE MID AND UPPER 50S. AT THE SAME TIME...DRIER
AIR WILL WORK ACROSS THE REGION WITH HUMIDITIES DROPPING TO AROUND
15 PERCENT.

COZ238>245-248>251-150000-
/O.NEW.KBOU.FW.W.0028.111114T1700Z-111115T0000Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-LOGAN COUNTY-
WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY-
946 AM MST MON NOV 14 2011

...RED FLAG WARNING IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR
WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE NORTHEAST PLAINS
OF COLORADO...

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG
WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT
UNTIL 5 PM MST THIS AFTERNOON. 

* AFFECTED AREA...FIRE WEATHER ZONES 238...239...240...241... 
  242...243...244...245...248...249...250 AND 251.

* TIMING...RED FLAG CONDITIONS ARE EXPECTED TO SPREAD EAST ACROSS
  THE PLAINS BY THE NOON HOUR. CONDITIONS WILL RAPIDLY IMPROVE BY
  SUNSET WITH HUMIDITIES INCREASING AND WINDS DECREASING.

* WINDS...WEST 15 TO 25 MPH WITH GUSTS AROUND 35 MPH. GUSTS UP TO
  45 MPH WILL OCCUR NEAR THE FOOTHILLS.

* RELATIVE HUMIDITY...NEAR 15 PERCENT.

* IMPACTS...GUSTY WINDS AND LOW HUMIDITIES WILL PRODUCE CONDITIONS
  FAVORABLE FOR RAPID FIRE GROWTH IN DRY GRASSES AND FUELS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS
ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE
OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING.

&&

$$

BARJENBRUCH
1 follow-up statement
979 
WWUS85 KBOU 142357
RFWBOU

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE DENVER CO
457 PM MST MON NOV 14 2011


COZ238>245-248>251-150100-
/O.EXP.KBOU.FW.W.0028.000000T0000Z-111115T0000Z/
LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-
BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD
COUNTY-
NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND
ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-
ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-
NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-
CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES-LOGAN COUNTY-
WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY-
457 PM MST MON NOV 14 2011

...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR
WIND AND LOW RELATIVE HUMIDITY FOR MOST OF THE NORTHEAST PLAINS
OF COLORADO...

THE RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON. 



$$

Nearby

Red Flag Warnings in Colorado, 2011Every red flag warning in 2011

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.