Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 39, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Dec 2, 2012, 7:59 AM MST for 7 counties in Colorado. It took effect at Dec 2, 2012, 12:00 PM MST. It was in force for 18 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 2, 2012, 7:59 AM MST (14:59 UTC)
- In effect from
- Dec 2, 2012, 12:00 PM MST
- Expired
- Dec 3, 2012, 5:31 AM MST
- In force
- 18 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO
The radar
The Denver radar (KFTG), 74 km from the middle of the area, began a volume at 15:04 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 2, 8:05 PM MST | NON-TSTM WND GST 74 | Lyons, CO | |
| Dec 3, 12:47 AM MST | NON-TSTM WND GST 67 | Lyons, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 3.0 hours before the alert went out and 187 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
- 3135 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
930 WWUS85 KBOU 021459 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 759 AM MST SUN DEC 2 2012 ...HIGH FIRE DANGER THIS AFTERNOON THROUGH TONIGHT... .WARM AND DRY CONDITIONS COUPLED WITH INCREASING WIND WILL RAISE THE FIRE DANGER AGAIN THIS AFTERNOON. THE STRONG WINDS WILL CONTINUE OVER THE MOUNTAINS...FRONT RANGE FOOTHILLS AND SOUTH PARK TONIGHT...EVEN THOUGH HUMIDITIES WILL BE RISING. A WEATHER SYSTEM WILL BE MOVING INTO WESTERN AND CENTRAL COLORADO TONIGHT WHICH WILL BRING SNOW AND HIGHER HUMIDITIES TO THE COLORADO MOUNTAINS ALONG WITH INCREASING WIND. COZ214>216-022300- /O.UPG.KBOU.FW.A.0017.121202T1900Z-121203T0700Z/ /O.NEW.KBOU.FW.W.0039.121202T1900Z-121203T1300Z/ CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- 759 AM MST SUN DEC 2 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 AM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... 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 AM MST MONDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 214...215 AND 216. * TIMING...WINDS WILL INCREASE THROUGH TODAY ESPECIALLY IN THE AFTERNOON. LOW HUMIDITIES WILL ALSO DEVELOP AS TEMPERATURES CLIMB INTO THE UPPER 40S AND 50S. WINDS WILL BECOME EVEN STRONGER TONIGHT...THOUGH IT WILL BE TURNING COLDER WITH HIGHER HUMIDITIES. * WINDS...WEST 25 TO 40 MPH WITH GUSTS UP TO 65 MPH. * RELATIVE HUMIDITY...AS LOW AS 17 PERCENT. * IMPACTS...FIRES WILL BE EASIER TO START AND WILL SPREAD MORE QUICKLY 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 UNSEASONABLE WARM TEMPERATURES WILL CREATE RAPID FIRE GROWTH POTENTIAL. && $$
3 follow-up statements
912 WWUS85 KBOU 022235 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 335 PM MST SUN DEC 2 2012 ...HIGH FIRE DANGER THIS AFTERNOON THROUGH TONIGHT... .WARM AND DRY CONDITIONS COUPLED WITH INCREASING WIND WILL RAISE THE FIRE DANGER AGAIN THIS AFTERNOON. THE STRONG WINDS WILL INCREASE TONIGHT OVER THE MOUNTAINS...FRONT RANGE FOOTHILLS AND SOUTH PARK...EVEN THOUGH HUMIDITIES WILL BE RISING. A WEATHER SYSTEM WILL BE MOVING INTO WESTERN AND CENTRAL COLORADO TONIGHT WHICH WILL BRING SNOW AND HIGHER HUMIDITIES TO THE COLORADO MOUNTAINS ALONG WITH INCREASING WIND. COZ214>216-030645- /O.CON.KBOU.FW.W.0039.000000T0000Z-121203T1300Z/ CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- 335 PM MST SUN DEC 2 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 AM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... * AFFECTED AREA...FIRE WEATHER ZONES 214...215 AND 216. * TIMING...WINDS WILL INCREASE EVEN FURTHER TONIGHT...WITH THE STRONGEST WINDS EXPECTED BETWEEN 1900 AND 0300 TONIGHT. HUMIDITIES WILL REMAIN LOW WITH ONLY A SLIGHT RECOVERY TONIGHT IN THE WINDY AREAS. * WINDS...WEST 15 TO 25 MPH WITH GUSTS UP TO 45 MPH UNTIL 1900...THEN INCREASING TO 25 TO 35 MPH WITH GUSTS UP TO 65 MPH. * RELATIVE HUMIDITY...5 TO 15 PERCENT. * IMPACTS...FIRES WILL BE EASIER TO START AND WILL SPREAD MORE QUICKLY UNDER THESE CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND UNSEASONABLE WARM TEMPERATURES WILL CREATE RAPID FIRE GROWTH POTENTIAL. && $$
944 WWUS85 KBOU 030445 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 945 PM MST SUN DEC 2 2012 ...HIGH FIRE DANGER THROUGH TONIGHT... .A WEATHER SYSTEM WILL BE MOVING ACROSS NORTHERN COLORADO TONIGHT WITH STRONG WINDS AND SNOW TO HIGHER ELEVATIONS WITH SOME LIGHT ACCUMULATIONS. COZ214>216-031300- /O.CON.KBOU.FW.W.0039.000000T0000Z-121203T1300Z/ CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- 945 PM MST SUN DEC 2 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 AM MST MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND SOUTH PARK... * AFFECTED AREA...FIRE WEATHER ZONES 214...215 AND 216. * TIMING...WINDS WILL INCREASE EVEN FURTHER TONIGHT...WITH THE STRONGEST WINDS EXPECTED THROUGH 0300 TONIGHT. HUMIDITIES WILL REMAIN LOW WITH ONLY A SLIGHT RECOVERY TONIGHT IN THE WINDY AREAS. * WINDS...WEST 25 TO 35 MPH WITH GUSTS UP TO 65 MPH. * RELATIVE HUMIDITY...15 TO 25 PERCENT. * IMPACTS...FIRES WILL BE EASIER TO START AND WILL SPREAD MORE QUICKLY 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 UNSEASONABLE WARM TEMPERATURES WILL CREATE RAPID FIRE GROWTH POTENTIAL. && $$
276 WWUS85 KBOU 031231 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 531 AM MST MON DEC 3 2012 ...DANGEROUS FIRE WEATHER CONDITIONS DECREASING... .A WEATHER SYSTEM MOVED OVER NORTHERN COLORADO OVERNIGHT BRINGING WINDY CONDITIONS TO THE MOUNTAINS AND FOOTHILLS AND AREAS OF SNOW TO THE MOUNTAINS WEST OF THE CONTINENTAL DIVIDE. AS WINDY CONDITIONS PERSISTED OVERNIGHT...HAZARDOUS FIRE WEATHER CONDITIONS ALSO CONTINUED. HOWEVER...AS HUMIDITY LEVELS GRADUALLY INCREASED OVERNIGHT...THE STAGE WAS SET FOR FIRE WEATHER CONDITIONS TO EASE AS WIND SPEEDS BEGAN DECREASING. GUSTY WINDS ARE EXPECTED TO DIMINISH OVER THE NEXT FEW HOURS AS PRESSURE GRADIENTS ACROSS THE STATE BEGIN TO RELAX. WITH COOLER TEMPERATURES...HIGHER HUMIDITIES AND LESS WIND EXPECTED THROUGH THIS AFTERNOON...THE THREAT OF DANGEROUS FIRE WEATHER CONDITIONS WILL BE ENDING. COZ214>216-031345- /O.CAN.KBOU.FW.W.0039.000000T0000Z-121203T1300Z/ CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- 531 AM MST MON DEC 3 2012 ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FRONT RANGE FOOTHILLS AND PARK COUNTY... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE RED FLAG WARNING. AS GUSTY WINDS DECREASE THROUGH THE MORNING HOURS...HIGHER HUMIDITIES AND COOLER TEMPERATURES WILL EASE THE DANGEROUS FIRE WEATHER CONDITIONS THAT HAVE BEEN IN PLACE OVER THE WEEKEND. FIRE BEHAVIOR IS NOT EXPECTED TO BE AS EXTREME TODAY AS IT HAS BEEN OVER THE PAST COUPLE DAYS. $$
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.