Alert archive / Colorado / Red Flag Warnings in 2015
Red Flag Warning 3, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 28, 2015, 4:55 AM MDT for 5 counties in Colorado. It took effect at Mar 28, 2015, 12:00 PM MDT. 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 28, 2015, 4:55 AM MDT (10:55 UTC)
- In effect from
- Mar 28, 2015, 12:00 PM MDT
- Expired
- Mar 28, 2015, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Broomfield County, CO, Jefferson County, CO, Larimer County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 64 km from the middle of the area, began a volume at 10:52 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 (KDEN), launched 00:00Z, 10.9 hours before the alert went out and 163 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
- 222 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 2244 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted, in the capitals the NWS used until 2016.
958 WWUS85 KBOU 281055 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 455 AM MDT SAT MAR 28 2015 ...FIRE DANGER INCREASING THIS AFTERNOON... DRY AIR...WARM TEMPERATURES...AND GUSTY WEST WINDS WILL COMBINE TO PRODUCE HIGH TO VERY HIGH FIRE DANGER THIS AFTERNOON. CONDITIONS WILL BE WORST NEAR THE WYOMING BORDER IN LARIMER AND WELD COUNTIES WHERE WINDS WILL GUST TO NEAR 30 MPH THIS AFTERNOON. COZ238-242-290000- /O.NEW.KBOU.FW.W.0003.150328T1800Z-150329T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY- 455 AM MDT SAT MAR 28 2015 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR ZONES 238 AND 242... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 238 AND 242...EASTERN LARIMER AND NORTHERN WELD COUNTIES. * TIMING...RED FLAG CONDITIONS WILL DEVELOP BY NOON AND CONTINUE UNTIL TEMPERATURE START TO COOL AROUND 6 PM. * WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 14 PERCENT. * IMPACTS...FIRES WILL IGNITE EASILY AND SPREAD RAPIDLY UNDER THESE CONDITIONS. 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. && $$ GIMMESTAD
2 follow-up statements
307 WWUS85 KBOU 281530 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 930 AM MDT SAT MAR 28 2015 ...HIGH FIRE DANGER THIS AFTERNOON NEAR THE WYOMING BORDER AND ALONG THE BASE OF THE FRONT RANGE FOOTHILLS... UNSEASONABLY WARM TEMPERATURES...VERY LOW HUMIDITY AND GUSTY WEST WINDS WILL COMBINE TO PRODUCE HIGH TO VERY HIGH RANGELAND FIRE DANGER THIS AFTERNOON. THESE CONDITIONS WILL BE MOST LIKELY NEAR THE WYOMING BORDER IN LARIMER AND WELD COUNTIES WHERE WINDS WILL GUST TO NEAR 30 MPH THIS AFTERNOON. THE DEVELOPMENT OF VERY WARM AND GUSTY DOWNSLOPE WINDS AREAS ALONG THE BASE OF THE FRONT RANGE FOOTHILLS IN BOULDER AND JEFFERSON COUNTIES WILL ALSO PRODUCE HIGH FIRE DANGER PARTICULARLY IN OPEN AREAS. COZ239-282330- /O.EXA.KBOU.FW.W.0003.150328T1800Z-150329T0000Z/ BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- 930 AM MDT SAT MAR 28 2015 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT TODAY FOR GUSTY WEST WIND AND LOW RELATIVE HUMIDITY ALONG THE BASE OF THE FRONT RANGE FOOTHILLS IN BOULDER AND JEFFERSON COUNTIES. THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT UNTIL 6 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 239. * TIMING...RED FLAG CONDITIONS WILL DEVELOP BY NOON AND CONTINUE UNTIL TEMPERATURES AND WIND SPEEDS DECREASE AROUND 6 PM. * WINDS...WEST 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 13 PERCENT. * IMPACTS...FIRES WILL IGNITE EASILY AND SPREAD RAPIDLY UNDER THESE CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY...AND VERY WARM TEMPERATURES CAN CONTRIBUTE TO VERY HIGH TO EXTREME FIRE BEHAVIOR. && $$ COZ238-242-282330- /O.CON.KBOU.FW.W.0003.150328T1800Z-150329T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY- 930 AM MDT SAT MAR 28 2015 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MDT TODAY FOR GUSTY WEST WINDS AND LOW RELATIVE HUMIDITY FOR ZONES 238 AND 242 UP ALONG THE WYOMING BORDER IN LARIMER AND WELD COUNTIES... * AFFECTED AREA...FIRE WEATHER ZONES 238 AND 242. * TIMING...RED FLAG CONDITIONS WILL DEVELOP BY NOON AND CONTINUE UNTIL TEMPERATURES AND WIND SPEEDS DECREASE AROUND 6 PM. * WINDS...WEST 15 TO 20 MPH WITH GUSTS UP TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 12 PERCENT. * IMPACTS...FIRES WILL IGNITE EASILY AND SPREAD RAPIDLY UNDER THESE CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY...AND VERY WARM TEMPERATURES CAN CONTRIBUTE TO VERY HIGH TO EXTREME FIRE BEHAVIOR. && $$ BAKER
043 WWUS85 KBOU 290003 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 603 PM MDT SAT MAR 28 2015 COZ238-239-242-290115- /O.EXP.KBOU.FW.W.0003.000000T0000Z-150329T0000Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTHEAST WELD COUNTY- 603 PM MDT SAT MAR 28 2015 ...RED FLAG WARNING HAS EXPIRED FOR GUSTY WEST WIND AND LOW RELATIVE HUMIDITY ALONG THE BASE OF THE FRONT RANGE FOOTHILLS IN BOULDER AND JEFFERSON COUNTIES. WINDS WERE BEGINNING TO DECREASE EARLY THIS EVEING AND HUMIDITIES WILL SLOWLY INCREASE SO THE RED FLLAG WARNING HAS BEEN ALLOWED TO EXPIRE. $$
Nearby
Red Flag Warnings in Colorado, 2015Every red flag warning in 2015
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.