Alert archive / Colorado / Red Flag Warnings in 2011
Red Flag Warning 24, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Sep 26, 2011, 10:45 AM MDT for 7 counties in Colorado. It took effect at Sep 26, 2011, 12:00 PM MDT. It was in force for 7 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 26, 2011, 10:45 AM MDT (16:45 UTC)
- In effect from
- Sep 26, 2011, 12:00 PM MDT
- Expired
- Sep 26, 2011, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Elbert County, CO, Larimer County, CO, Lincoln County, CO, Morgan County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 26 km from the middle of the area, began a volume at 16:45 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, 4.8 hours before the alert went out and 90 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
- 3533 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
122 WWUS85 KBOU 261645 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT MON SEP 26 2011 ...UNSEASONABLY WARM AND DRY CONDITIONS ALONG WITH BREEZY NORTH WINDS WILL BRING HIGH FIRE DANGER TODAY... .AN INCREASE IN NORTHERLY FLOW WILL BRING BREEZY NORTH WINDS TO PORTIONS OF NORTHEAST COLORADO THIS AFTERNOON. THE STRONGEST WINDS OF 15-20 MPH WITH GUSTS TO 25 TO 30 MPH WILL OCCUR FROM LARIMER AND WELD COUNTIES SOUTHWARD THROUGH THE FORT MORGAN...BYERS...AND LIMON AREA. TEMPERATURES WILL BE UNSEASONABLY WARM WITH VERY LOW HUMIDITY READINGS. FUELS ARE QUITE DRY AS WELL...ESPECIALLY GRASS. ANY NEW FIRE STARTS COULD SPREAD RAPIDLY THIS AFTERNOON DUE TO THE DRY CONDITIONS. COZ238-242>246-270045- /O.NEW.KBOU.FW.W.0024.110926T1800Z-110927T0100Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- 1045 AM MDT MON SEP 26 2011 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS 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 UNTIL 7 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONES 238...242...243...244... 245 AND 246. * TIMING...NOON UNTIL 1900 MDT. * WINDS...NORTH 15 TO 20 MPH WITH GUSTS UP TO 30 MPH. * RELATIVE HUMIDITY...NEAR 10 PERCENT. * IMPACTS...THE VERY DRY CONDITIONS AND GUSTY WINDS COULD LEAD TO RAPID GROWTH OF NEW FIRE STARTS ESPECIALLY IN THIS SEASONS WELL CURED GRASS. 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. && $$ BARJENBRUCH
1 follow-up statement
283 WWUS85 KBOU 270101 RFWBOU URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 701 PM MDT MON SEP 26 2011 COZ238-242>246-270215- /O.EXP.KBOU.FW.W.0024.000000T0000Z-110927T0100Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- 701 PM MDT MON SEP 26 2011 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY... THE RED FLAG WARNING IS NO LONGER IN EFFECT. $$
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.