Alert archive / Colorado / Red Flag Warnings in 2011
Red Flag Warning 25, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Oct 4, 2011, 2:50 AM MDT for 10 counties in Colorado. It took effect at Oct 4, 2011, 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
- Oct 4, 2011, 2:50 AM MDT (08:50 UTC)
- In effect from
- Oct 4, 2011, 12:00 PM MDT
- Expired
- Oct 4, 2011, 6:00 PM MDT
- In force
- 6 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 radar
The Denver radar (KFTG), 90 km from the middle of the area, began a volume at 08:47 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 00:00Z, 8.8 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
- 46 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 3257 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
160 WWUS85 KBOU 040850 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 250 AM MDT TUE OCT 4 2011 ...HIGH FIRE DANGER OVER PORTIONS OF THE PLAINS TODAY... .SOUTHERLY WINDS WILL INCREASE RATHER SHARPLY ACROSS THE EASTERN PLAINS OF COLORADO BY THE NOON HOUR. GUSTS BY MID TO LATE AFTERNOON ARE EXPECTED TO REACH 35 MPH. HUMIDITY READINGS ARE ALSO EXPECTED TO DROP TO NEAR 15 PERCENT. GIVEN THE VERY DRY FUELS...FIRE DANGER WILL BE VERY HIGH ESPECIALLY IN GRASSLAND. COZ242-244>251-041700- /O.NEW.KBOU.FW.W.0025.111004T1800Z-111005T0000Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- 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- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 250 AM MDT TUE OCT 4 2011 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF THE EASTERN PLAINS OF COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A RED FLAG WARNING FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 242...244...245...246... 247...248...249...250 AND 251. * TIMING...NOON UNTIL 6 PM MDT THIS EVENING. * WINDS...SOUTH 15 TO 25 MPH WITH GUSTS AROUND 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 15 PERCENT. * IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH VERY DRY FUELS WILL LEAD TO HIGH FIRE DANGER. ANY NEW FIRE STARTS WILL BE ABLE TO SPREAD RAPIDLY GIVEN THE STRONG WINDS AND VERY DRY FUELS. 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. CONTROLLED BURNS OR OPEN BURNING SHOULD BE AVOIDED TODAY GIVEN THE POTENTIAL FOR RAPID OUT OF CONTROL FIRE SPREAD. && $$ BARJENBRUCH
2 follow-up statements
696 WWUS85 KBOU 041649 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1049 AM MDT TUE OCT 4 2011 ...HIGH FIRE DANGER OVER PORTIONS OF THE PLAINS TODAY... .STRONG SOUTHERLY WINDS WILL DEVELOP ACROSS THE PLAINS OF EASTERN COLORADO THIS AFTERNOON. BY MID TO LATE AFTERNOON GUSTS WILL REACH 35 MPH. HUMIDITY READINGS ARE ALSO EXPECTED TO DROP TO NEAR 15 PERCENT. GIVEN THE VERY DRY FUELS...FIRE DANGER WILL BE VERY HIGH ESPECIALLY IN GRASSLANDS. COZ242-244>251-050000- /O.CON.KBOU.FW.W.0025.111004T1800Z-111005T0000Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 1049 AM MDT TUE OCT 4 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF THE EASTERN PLAINS OF COLORADO... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 242...244...245...246... 247...248...249...250 AND 251. * TIMING...NOON UNTIL 6 PM MDT THIS EVENING. * WINDS...SOUTH 15 TO 25 MPH WITH GUSTS TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 15 PERCENT. * IMPACTS...THE STRONG AND GUSTY WINDS COMBINED WITH VERY DRY FUELS WILL LEAD TO HIGH FIRE DANGER. ANY NEW FIRE STARTS WILL BE ABLE TO SPREAD RAPIDLY GIVEN THE STRONG WINDS AND VERY DRY FUELS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. CONTROLLED BURNS OR OPEN BURNING SHOULD BE AVOIDED TODAY GIVEN THE POTENTIAL FOR RAPID OUT OF CONTROL FIRE SPREAD. && $$ GIMMESTAD
476 WWUS85 KBOU 042353 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 553 PM MDT TUE OCT 4 2011 COZ242-244>251-050100- /O.EXP.KBOU.FW.W.0025.000000T0000Z-111005T0000Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- 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- LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 553 PM MDT TUE OCT 4 2011 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF THE EASTERN PLAINS OF COLORADO... THE RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING. RELATIVE HUMIDITY VALUES ARE CURRENTLY RUNNING AROUND 15 PERCENT. THE WILL INCREASE AFTER 6 PM. THEREFORE...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 6 PM. FIRE DANGER WILL REMAIN ELEVATED THROUGH THE EVENING AS GUSTY SOUTHERLY WINDS CONTINUE THROUGH THE EVENING HOURS. $$
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.