Alert archive / Colorado / Red Flag Warnings in 2012
Red Flag Warning 31, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Sep 1, 2012, 3:43 AM MDT for 10 counties in Colorado. It took effect at Sep 1, 2012, 11:00 AM MDT. It was in force for 8 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
- Sep 1, 2012, 3:43 AM MDT (09:43 UTC)
- In effect from
- Sep 1, 2012, 11:00 AM MDT
- Expired
- Sep 1, 2012, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 9.7 hours before the alert went out and 36 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
- 3977 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
765 WWUS85 KBOU 010943 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 343 AM MDT SAT SEP 1 2012 COZ246-248>251-011745- /O.UPG.KBOU.FW.A.0013.120901T1700Z-120902T0100Z/ /O.NEW.KBOU.FW.W.0031.120901T1700Z-120902T0100Z/ NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- 343 AM MDT SAT SEP 1 2012 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF NORTHEAST COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONES 246...248...249...250 AND 251. * TIMING...HOT AND DRY CONDITIONS WILL RETURN AGAIN BY THIS AFTERNOON. * WINDS...SOUTH 15 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...WEATHER CONDITIONS WILL COMBINE WITH THE DRY FUELS TO PRODUCE CONDITIONS FAVORABLE FOR FIRE STARTS AND RAPID 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. && $$ COZ242-244-245-011745- /O.NEW.KBOU.FW.W.0031.120901T1700Z-120902T0100Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- 343 AM MDT SAT SEP 1 2012 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PLAINS OF NORTHEAST COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 242...244 AND 245. * TIMING...HOT AND DRY CONDITIONS WILL RETURN AGAIN BY THIS AFTERNOON. * WINDS...SOUTH 10 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...WEATHER CONDITIONS WILL COMBINE WITH THE DRY FUELS TO PRODUCE CONDITIONS FAVORABLE FOR FIRE STARTS AND RAPID SPREAD. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$
2 follow-up statements
345 WWUS85 KBOU 011835 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1235 PM MDT SAT SEP 1 2012 COZ242-244>246-248>251-020100- /O.CON.KBOU.FW.W.0031.000000T0000Z-120902T0100Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- 1235 PM MDT SAT SEP 1 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTHEAST COLORADO... * AFFECTED AREA...FIRE WEATHER ZONES 242...244...245...246... 248...249...250 AND 251 ON THE PLAINS OF NORTHEAST COLORADO. * TIMING...UNSEASONABLY WARN TEMPERATURES...LOW RELATIVE HUMIDITY...A HIGH HAINES INDEX AND GUSTY SOUTHERLY WINDS WILL PREVAIL THROUGH EARLY THIS EVENING. * WINDS...SOUTHERLY AT 10 TO 20 MPH WITH GUSTS TO AROUND 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 8 PERCENT. * IMPACTS...FAVORABLE WEATHER CONDITIONS WILL COMBINE WITH VERY DRY FUELS TO POTENTIALLY PRODUCE WILDLAND FIRE STARTS AND RAPID 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. && $$ BAKER
228 WWUS85 KBOU 020105 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 705 PM MDT SAT SEP 1 2012 COZ242-244>246-248>251-020215- /O.EXP.KBOU.FW.W.0031.000000T0000Z-120902T0100Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY- PHILLIPS COUNTY- 705 PM MDT SAT SEP 1 2012 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE EASTERN PLAINS OF COLORADO... SOUTHERLY WINDS ACROSS THE EASTERN PLAINS HAVE DECREASED SUFFICIENTLY TO ALLOW THE RED FLAG WARNING TO EXPIRE. TEMPERATURES WERE ALSO COOLING WITH HUMIDITIES GRADUALLY INCREASING. $$ BARJENBRUCH
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.