Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 8, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Apr 5, 2012, 3:38 PM MDT for 12 counties in Colorado. It took effect at Apr 6, 2012, 9:00 AM MDT. It was in force for 11 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
- Apr 5, 2012, 3:38 PM MDT (21:38 UTC)
- In effect from
- Apr 6, 2012, 9:00 AM MDT
- Expired
- Apr 6, 2012, 8:00 PM MDT
- In force
- 11 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, Grand County, CO, Jackson County, CO, Larimer County, CO, Morgan County, CO, Summit County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 55 km from the middle of the area, began a volume at 21:36 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, 9.6 hours before the alert went out and 160 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
- 1765 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
055 WWUS85 KBOU 052138 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 338 PM MDT THU APR 5 2012 ...CRITICAL FIRE WEATHER FOR NORTH AND MIDDLE PARKS THROUGH THIS EVENING...SPREADING ACROSS THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS FRIDAY... .DRY AND WINDY CONDITIONS WILL CONTINUE OVER THE MOUNTAINS TODAY AS A STORM SYSTEM OVER THE WESTERN UNITED STATES DEEPENS. CONDITIONS ARE EXPECTED TO IMPROVE LATER THIS EVENING. ON FRIDAY...EVEN STRONGER WINDS ARE EXPECTED TO DEVELOP DURING THE AFTERNOON HOURS WITH LOWER HUMIDITIES SPREADING ACROSS THE FRONT RANGE FOOTHILLS AND ADJACENT PLAINS. WIND GUSTS TO 40 MPH CAN BE EXPECTED AND HUMIDITIES WILL DROP TO AROUND 10 PERCENT. COZ214-216-239-052245- /O.CAN.KBOU.FW.A.0005.120406T1800Z-120407T0200Z/ CENTRAL AND SOUTHEAST PARK COUNTY- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- 338 PM MDT THU APR 5 2012 ...FIRE WEATHER WATCH IS CANCELLED FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTH PARK...THE FRONT RANGE FOOTHILLS... AND ADJACENT PLAINS... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE FIRE WEATHER WATCH. FUELS HAVE BEEN DETERMINED TO BE UNRESPONSIVE TO FIRE GROWTH AND SPREAD. $$ COZ215-238-240-242>245-060700- /O.UPG.KBOU.FW.A.0005.120406T1800Z-120407T0200Z/ /O.NEW.KBOU.FW.W.0008.120406T1800Z-120407T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 338 PM MDT THU APR 5 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TO 8 PM MDT FRIDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 215...238...240...242... 243...244 AND 245. * TIMING...NOON TO 8 PM MDT FRIDAY. * WINDS...SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 40 MPH OVER THE PLAINS...GUSTS UP TO 50 MPH OVER THE HIGHER FOOTHILLS. * RELATIVE HUMIDITY...AS LOW AS 9 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL FRIDAY AFTERNOON AND EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ COZ211-213-060100- /O.CON.KBOU.FW.W.0007.000000T0000Z-120406T0100Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- 338 PM MDT THU APR 5 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... * AFFECTED AREA...FIRE WEATHER ZONES 211 AND 213. * TIMING...HUMIDITIES WILL IMPROVE SLIGHTLY BY 7 PM WITH WINDS GRADUALLY DECREASING EARLY THIS EVENING. * WINDS...SOUTHWEST 15 TO 20 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL THIS AFTERNOON AND EARLY EVENING. 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. && $$
4 follow-up statements
783 WWUS85 KBOU 060114 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 714 PM MDT THU APR 5 2012 COZ211-213-060215- /O.EXP.KBOU.FW.W.0007.000000T0000Z-120406T0100Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- 714 PM MDT THU APR 5 2012 ...RED FLAG WARNING HAS EXPIRED FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR NORTH PARK AND MIDDLE PARK... THE RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE. $$ COZ215-238-240-242>245-060915- /O.CON.KBOU.FW.W.0008.120406T1800Z-120407T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 714 PM MDT THU APR 5 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS... * AFFECTED AREA...FIRE WEATHER ZONES 215...238...240...242... 243...244 AND 245. * TIMING...NOON TO 8 PM MDT FRIDAY. * WINDS...SOUTHWEST 15 TO 25 MPH WITH GUSTS UP TO 50 MPH. * RELATIVE HUMIDITY...AS LOW AS 9 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL FRIDAY AFTERNOON AND EVENING. 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. && $$
379 WWUS85 KBOU 060846 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 246 AM MDT FRI APR 6 2012 COZ211-213-061900- /O.EXB.KBOU.FW.W.0008.120406T1500Z-120407T0200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- 246 AM MDT FRI APR 6 2012 ...RED FLAG WARNING IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE HIGH MOUNTAIN VALLEYS OF JACKSON AND GRAND COUNTIES... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 211 AND 213. * TIMING...9 AM TO 8 PM MDT FRIDAY. * WINDS...SOUTHWEST 25 TO 35 MPH WITH GUSTS UP TO 50 MPH. * RELATIVE HUMIDITY...AS LOW AS 15 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL FRIDAY AFTERNOON AND EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ COZ215-238-240-242>245-061900- /O.EXT.KBOU.FW.W.0008.120406T1500Z-120407T0200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 246 AM MDT FRI APR 6 2012 ...RED FLAG WARNING NOW IN EFFECT FROM 9 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS... * AFFECTED AREA...FIRE WEATHER ZONES 215...238...240...242... 243...244 AND 245. * TIMING...9 AM TO 8 PM MDT FRIDAY. * WINDS...SOUTHWEST 25 TO 35 MPH WITH GUSTS UP TO 50 MPH. * RELATIVE HUMIDITY...AS LOW AS 11 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL FRIDAY AFTERNOON AND EVENING. 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. && $$
583 WWUS85 KBOU 061959 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 159 PM MDT FRI APR 6 2012 COZ211-213-215-238-240-242>245-070200- /O.CON.KBOU.FW.W.0008.000000T0000Z-120407T0200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 159 PM MDT FRI APR 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS... * AFFECTED AREA...FIRE WEATHER ZONES 211...213...215...238... 240...242...243...244 AND 245. * TIMING...9 AM TO 8 PM MDT FRIDAY. * WINDS...SOUTHWEST 25 TO 35 MPH WITH GUSTS UP TO 50 MPH. * RELATIVE HUMIDITY...AROUND 10 PERCENT. * IMPACTS...ANY FIRES THAT START MAY SPREAD QUICKLY AND BE DIFFICULT TO CONTROL FRIDAY AFTERNOON AND EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$
885 WWUS85 KBOU 070154 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 754 PM MDT FRI APR 6 2012 COZ211-213-215-238-240-242>245-070300- /O.EXP.KBOU.FW.W.0008.000000T0000Z-120407T0200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 754 PM MDT FRI APR 6 2012 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHERN FRONT RANGE FOOTHILLS AND ADJACENT PLAINS... A FEW LOCATIONS IN AND NEAR THE FOOTHILLS MAY SEE RED FLAG CONDITIONS THROUGH 10 PM AS WINDS CONTINUE TO GUSTS TO 40 MPH WITH RELATIVE HUMIDITIES LESS THAN 15 PERCENT. OTHERWISE...WINDS WILL CONTINUE TO DECREASE AND RELATIVE HUMIDITIES WILL RISE THROUGH THE EVENING HOURS. THEREFORE THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 4:05 AM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 12 hr |
Nearby
Red Flag Warnings in Colorado, 2012Every red flag warning in 2012
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.