Alert archive / Colorado / Red Flag Warnings in 2011
Red Flag Warning 28, NWS Denver/Boulder, CO
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.
- 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
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.