Alert archive / Colorado / Red Flag Warnings in 2011
Red Flag Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 25, 2011, 9:50 AM MDT for 5 counties in Colorado. It was in force for 10 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 25, 2011, 9:50 AM MDT (15:50 UTC)
- Expired
- Mar 25, 2011, 8:01 PM MDT
- In force
- 10 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO
The radar
The Denver radar (KFTG), 47 km from the middle of the area, began a volume at 15:49 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, 3.8 hours before the alert went out and 100 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
- 3134 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
095 WWUS85 KBOU 251550 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 950 AM MDT FRI MAR 25 2011 COZ241-245>247-260200- /O.NEW.KBOU.FW.W.0009.110325T1550Z-110326T0200Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- 950 AM MDT FRI MAR 25 2011 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 241...245... 246 AND 247... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 241...CASTLE ROCK... ELBERT...FONDIS...KIOWA...LARKSPUR...FIRE WEATHER ZONE 245... BENNETT...BYERS...DEER TRAIL...LEADER...FIRE WEATHER ZONE 246...AGATE...HUGO...LIMON...MATHESON...FIRE WEATHER ZONE 247...FORDER...KARVAL...KUTCH...PUNKIN CENTER. * TIMING...GUSTY WINDS WILL CONTINUE THROUGH THE DAY. RELATIVE HUMIDITY WILL BE DROPPING TO LOWER TEENS DURING THE MORNING HOURS. * WIND...SOUTHERLY WINDS OF 25 TO 35 MPH WILL PERSIST ACROSS THE AREA THROUGH THE EARLY EVENING. * HUMIDITY...RELATIVE HUMIDITY READINGS OF 10 TO 15 PERCENT CAN BE EXPECTED THROUGH THE AFTERNOON. * IMPACTS...THE GUSTY WINDS AND LOW HUMIDITY WILL COMBINE TO PRODUCE DANGEROUS FIRE WEATHER CONDITIONS. NEW FIRE STARTS AND ANY ONGOING FIRES WILL QUICKLY SPREAD. 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. && $$ LESZCYNSKI
1 follow-up statement
710 WWUS85 KBOU 260201 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 801 PM MDT FRI MAR 25 2011 COZ241-245>247-260315- /O.CAN.KBOU.FW.W.0009.000000T0000Z-110326T0200Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- 801 PM MDT FRI MAR 25 2011 ...RED FLAG WARNING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 241...245...246 AND 247 HAS EXPIRED... THE NATIONAL WEATHER SERVICE IN DENVER HAS ALLOWED THE RED FLAG WARNING TO EXPIRE. $$
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.